At present, there is limited information regarding the diet and feeding habits of Mesoplodon perrini. However, it is suspected that these whales feed primarily on squid and some fish, as do many other ziphiids. This is supported by gut content analysis of two of the type specimens. One contained the eye lens of a squid, and the other contained two squid beaks (identifed as Octopoteuthis deletron) and unidentified vertebrate parts.
Animal Foods: fish; mollusks
Primary Diet: carnivore (Piscivore , Molluscivore )
Mesoplodon perrini was named to honor American cetologist William F. Perrin.
Although little is known about how Mesoplodon perrini communicates, research on other species of mesoplodont whales indicates that they have the ability to echolocate. A 2004 study involving tagged Mesoplodon densirostris found that these animals are very vocal, most frequently emitting ultrasonic clicks that are well outside the range of human hearing. This research also revealed that these whales only emit clicks when they are below 200 meters depth, where they most commonly forage.
Communication Channels: acoustic
Perception Channels: tactile ; acoustic ; echolocation ; chemical
Since so little is known about the habits of Mesoplodon perrini, and so few individuals have been encountered in the wild, it is difficult to adequately evaluate how many individuals are left and what potential threats (if any) there are to the survival of the species. According to the ICUN, this species has the potential to become caught in certain types of fishing gear, such as deepwater gill nets used for capturing large pelagic fish species. Like other marine mammals, it may also be negatively impacted by navy sonar and loud noises generated by seismic exploration. Climate change may also cause their range to change or grow smaller, but since the specific range of M. perrini has yet to be determine, this assertion is presently based only on conjecture.
US Federal List: no special status
CITES: appendix ii
IUCN Red List of Threatened Species: data deficient
Members of this species are probably too rare to have a significant negative impact on humans.
Members of this species are probably to rare to be important to humans.
Members of this species consume fish and squid. They are probably not significant as prey for other animals.
Commensal/Parasitic Species:
At present, Perrin's beaked whales (Mesoplodon perrini) are only found in the northern Pacific Ocean. Four of the five known specimens of this whale species were found stranded along the coast of southern California within 85 kilometers of one another in the late 1970's. Although this suggests an eastern distribution within the North Pacific, there is currently too little information to come to any firm conclusions. Scars attributed to cookie cutter sharks (Isistius) that were found on one of the type specimens indicates that M. perrini may migrate through tropical regions where this shark is found in surface waters. However, it could also indicate a more northern distribution of Isistius.
Biogeographic Regions: pacific ocean (Native )
Like most other ziphiids, Mesoplodon perrini spends the majority of its time in deep oceanic waters over 1,000 meters deep.
Habitat Regions: temperate ; saltwater or marine
Aquatic Biomes: pelagic
Since Mesoplodon perrini is such an elusive species, as is typical of this genus, nothing is known about its longevity and life history.
Mesoplodon perrini is similar in shape to other members of this genus, with a short head and tail, a long abdomen, and a deep caudal peduncle. Like its closest relatives, Mesoplodon hectori and Mesoplodon peruvianus, it has a relatively short snout. It has a crescent-shaped blowhole with the tips facing towards the head. The mouth forms a straight line, and a series of grooves are present along the throat. As adults, M. perrini have dark gray coloration on their backs which grades to white on their undersides. The ventral side of their tail flukes is a lighter shade of grey with striations. Juvenile type specimens have a somewhat different color pattern, with a white area around the throat and a dark grey patch around the rostrum and eyes. Only the original five beached specimens have been accurately measured. The adult female was approximately 4.4 meters from nose to tail, while the adult male was 3.9 meters in length. The other three specimens were juvenile males, which were measured at 2.1, 2.2, and 2.4 meters.
Like other mesoplodont whales, male M. perrini have a set of tusk-like teeth that originate from the lower jaw. These tusks are not present in females. It is thought that they play a role in intrasexual competition, as is evidenced by a series of long, white scars along the flank of the adult male type specimen. The tusks may also help these whales distinguish individuals belonging to their species from those of similar, sympatric species.
Mesoplodon perrini is similar in appearance to a related species, M. hectori. In fact, many of the type specimens of this species were originally identified as the latter species, and were only designated as a separate species by Dalebout in 2002. Morphological characteristics that set these two species apart include minor differences in the cranium, teeth, and mandible.
Most of the characteristics that set M. perrini apart from related species are molecular. Substantial differences in mtDNA and cytochrome b form the basis for its diagnosis as a new species. Morphological similarities suggested that the closest relative of M. perrini was M. hectori. However, based on the molecular characters, Dalebout et al. concluded that its true sister species is M. peruvianus. This conclusion was later supported by analysis of nuclear actin sequences by Dalebout et al. (2004).
Range length: 2.10 to 4.43 m.
Other Physical Features: endothermic ; homoiothermic; bilateral symmetry
Sexual Dimorphism: ornamentation
The only known predators of Mesoplodon perrini are sharks and humans. Scars left by cookiecutter shark bites (Isistius) were present on one of the type specimens, but they did not appear to have caused any lasting damage. Although mesoplodont whales were never harvested commercially, there have been reports of them being taken by humans from time to time.
Known Predators:
No information is available on mating in Mesoplodon perrini.
There is currently little information available regarding reproductive habits of Mesoplodon perrini or other ziphiids. The two adult type specimens were both sexually mature, and an analysis of the teeth indicated an approximate age of 9 years for both of them.
Key Reproductive Features: iteroparous ; gonochoric/gonochoristic/dioecious (sexes separate); sexual ; viviparous
Little is known about parental investment in Mesoplodon perrini. However, the 2.1 meter type specimen had a fringed tongue, which indicates that it was not yet weaned when it died. Researchers suspect that it was the calf of the adult female type specimen, and that it was still dependent on her when she was stranded. Like all other whales, young are able to swim soon after birth.
Parental Investment: precocial ; pre-fertilization (Provisioning, Protecting: Female); pre-hatching/birth (Provisioning: Female, Protecting: Female); pre-weaning/fledging (Provisioning: Female); pre-independence (Provisioning: Female, Protecting: Female)
Mezoplodon Perrin (Mesoplodon perrini) a zo ur morvil dantek.
El zífid de Perrin (Mesoplodon perrini) és l'espècie de zífid descrita més recentment. Se la descobrí per primer cop al mig del 1975 davant la costa de Califòrnia i se'n trobaren quatre exemplars més abans del setembre del 1997. Inicialment se'ls identificà com a zífids d'Héctor (Mesoplodon hectori), tret del més recent, que fou considerat un zífid de Cuvier nounat. Després de la inclusió d'un d'aquests exemplars en una base de dades de seqüències d'ADNmt de zífids, resultà ser ben diferent de M. hectori.[1] L'espècie fou descrita formalment el 2002 per Dalebout i cols; el seu nom és un homenatge al cetòleg William F. Perrin.
El zífid de Perrin (Mesoplodon perrini) és l'espècie de zífid descrita més recentment. Se la descobrí per primer cop al mig del 1975 davant la costa de Califòrnia i se'n trobaren quatre exemplars més abans del setembre del 1997. Inicialment se'ls identificà com a zífids d'Héctor (Mesoplodon hectori), tret del més recent, que fou considerat un zífid de Cuvier nounat. Després de la inclusió d'un d'aquests exemplars en una base de dades de seqüències d'ADNmt de zífids, resultà ser ben diferent de M. hectori. L'espècie fou descrita formalment el 2002 per Dalebout i cols; el seu nom és un homenatge al cetòleg William F. Perrin.
Der Perrin-Schnabelwal (Mesoplodon perrini) ist eine Walart aus der Familie der Schnabelwale (Ziphiidae). Die Art wurde erst im Jahr 2002 wissenschaftlich beschrieben.
Zwischen 1975 und 1997 strandeten fünf Exemplare dieser Art an der Küste Kaliforniens, vier wurden irrtümlich dem Hector-Schnabelwal zugerechnet, einer Walart, die ansonsten nur in den Gewässern rund um die Antarktis vorkommt, ein Fund wurde zunächst für einen jungen Cuvier-Schnabelwal gehalten. Molekulargenetische Untersuchungen haben aber bestätigt, dass es sich um eine neue Art handelt, die 2002 zu Ehren des amerikanischen Walforschers William Perrin benannt wurde. Die Untersuchungen haben auch gezeigt, dass ihr nächster Verwandte der Peruanische Schnabelwal ist, eine in den 1990ern entdeckte Art, die ebenfalls nur aus dem östlichen Pazifik bekannt ist.
Perrin-Schnabelwale sind sehr kleine Vertreter ihrer Gattung, sie erreichen eine Länge von 4 bis 4,5 Metern. Sie sind durch eine kurze Schnauze gekennzeichnet; die Oberseite und die Flipper der Tiere sind dunkelgrau, die Flanken und der Bauch heller, fast weißlich gefärbt. Der Mageninhalt der gestrandeten Tiere ergab, dass sie sich in erster Linie von Tintenfischen ernähren. Wahrscheinlich ist die Art auf den nördlichen Pazifik oder nur Teile davon beschränkt.
Der Perrin-Schnabelwal (Mesoplodon perrini) ist eine Walart aus der Familie der Schnabelwale (Ziphiidae). Die Art wurde erst im Jahr 2002 wissenschaftlich beschrieben.
Zwischen 1975 und 1997 strandeten fünf Exemplare dieser Art an der Küste Kaliforniens, vier wurden irrtümlich dem Hector-Schnabelwal zugerechnet, einer Walart, die ansonsten nur in den Gewässern rund um die Antarktis vorkommt, ein Fund wurde zunächst für einen jungen Cuvier-Schnabelwal gehalten. Molekulargenetische Untersuchungen haben aber bestätigt, dass es sich um eine neue Art handelt, die 2002 zu Ehren des amerikanischen Walforschers William Perrin benannt wurde. Die Untersuchungen haben auch gezeigt, dass ihr nächster Verwandte der Peruanische Schnabelwal ist, eine in den 1990ern entdeckte Art, die ebenfalls nur aus dem östlichen Pazifik bekannt ist.
Perrin-Schnabelwale sind sehr kleine Vertreter ihrer Gattung, sie erreichen eine Länge von 4 bis 4,5 Metern. Sie sind durch eine kurze Schnauze gekennzeichnet; die Oberseite und die Flipper der Tiere sind dunkelgrau, die Flanken und der Bauch heller, fast weißlich gefärbt. Der Mageninhalt der gestrandeten Tiere ergab, dass sie sich in erster Linie von Tintenfischen ernähren. Wahrscheinlich ist die Art auf den nördlichen Pazifik oder nur Teile davon beschränkt.
Perrin's beaked whale (Mesoplodon perrini) is part of the toothed whale suborder and is one of over 90 known cetaceans in existence today.[3] Beaked whales are part of the family Ziphiidae, which are the second most diverse group out of all marine mammals with over 20 species currently recognized.[4] Although diverse, little is understood about these timid, deep divers that can dive for up to two hours.[5] The whales are partially named after their beak shaped jaw, which extends from their small head. The genus name Mesoplodon comes from the Greek meanings of meso- (middle), - hopla (arms), - odon (teeth), and may be translated as 'armed with a tooth in the center of the jaw'.
Perrin's beaked whale was described as a new species in 2002 by Dalebout et al. based on five animals stranding on the coast of California between 1975 and 1997, which were initially identified as other species.[6] The common and specific names of Mesopledon perrini are a tribute to cetologist William F. Perrin. As of May 2019, only six specimens have ever been examined.[6] The first two specimens were found stranded on the California coast in May 1975, other specimens were found in 1978, 1979, September 1997 (a strong El Niño year), and October 2013.[7] The first four individuals were initially identified as Hector's beaked whales (Mesoplodon hectori), but the mtDNA sequence database of beaked whales revealed the specimens were genetically distinct. The fifth was assumed to be a neonate Cuvier's beaked whale (Ziphius cavirostris).
Perrin's beaked whales are closely related to pygmy beaked whales and likely represent pygmy beaked whales' Northern Hemisphere sister species. Perrin's beaked whales have not definitively been recorded alive by scientists; however, its appearance is known from beached specimens. Perrin's beaked whales cannot be identified with absolute certainty at sea. However, the combination of small size, appearance, and a small presumed geographical range makes uncertainty unlikely. Stranded specimens can be identified as this species by either DNA sequence data and/or anatomical details of the skull.[4]
The morphology of the Perrin's beaked whale Mesoplodon perrini resembles the Hector's beaked whale M. hectori.[4] Morphological characteristics that set these two species apart include minor differences in the cranium, teeth, and mandible.[4] External appearances of Perrin's beaked whales are typical of Mesoplodon beaked whales, with a relatively small head, long thorax and abdomen, deep peduncle, and short tail.[4] Only the original five beached specimens have been accurately measured. From nose to tail, the adult female was approximately 4.4 meters (~14.5 feet), while the adult male was 3.9 meters (~13 feet). The other three specimens were juvenile males, which measured between 2.1-2.4 meters (~7-7.5 ft).[4]
The rostrum of Perrin's beaked whales are relatively short compared to all other species in the genus, except for M. hectori and M. peruvianus.[4] The rostrum of calves appears to be shorter and stubbier than adults.[4] The teeth are fairly large and towards the tip of the mouth.[4] The blowhole is broad and crescent-shaped, with the tips pointing anteriorly (toward the front/head; see blowhole image).[4] The melon forms a small bulge, the mouthline is straight, and throat grooves are present.[4]
Adult males are dark gray dorsally (on back) grading to white ventrally (on stomach).[4] The ventral side of the tail flukes are light gray with converging striations and a white patch around the umbilicus (navel).[4] The coloration of females is not known, since the only specimen was moderately decomposed.[4] Calves are light to dark gray dorsally and white ventrally.[4] The lower jaw and throat regions are white.[4]
A dark gray region extends from the corner of the mouth and encompasses the eye and the rostrum, forming an extended mask.[4] The flippers are medium to dark gray dorsally and white ventrally.[4] There is a lighter-colored patch on the anterodistal portion.[4] The flukes are dark gray dorsally and medium to light gray ventrally.[4] The ventral surface includes a pattern of white striations that converge posteromedially.[4]
A photograph of a possible living specimen - one of the two observed in 1976 - is featured in Rice (1978: 95) as "Mesoplodon carlhubbsi", a distinctly larger species also native to the waters off California. Recordings of the animals' vocalizations were also gained during this opportunity.[8]
In Perrin's beaked whale, the teeth are located near the tip of the lower jaw and are roughly equilateral triangles when viewed laterally (from the side) in the jaw, which resembles the font teeth of Baird's beaked whale (Berardius bairdii) more than other Mesoplodon species.[4] Like other mesoplodont whales, male M. perrini have a set of tusk-like teeth that originate from the lower jaw (see image).[4] These tusks are not present in females. A series of long, white scars along the flank of the adult male specimen brought to the conclusion that tusks may play a role in intrasexual competition. The tusks may also help these whales distinguish individuals belonging to their species from those of similar, sympatric species.[4][9]
Most of the characteristics that set M. perrini apart from related species are molecular. Substantial differences in mtDNA and cytochrome b form the basis for its diagnosis as a new species. Morphological similarities suggested that the closest relative of M. perrini was M. hectori. However, based on the molecular characters, Dalebout et al. concluded that its true sister species is M. peruvianus.[4] This conclusion was later supported by analysis of nuclear actin sequences by Dalebout et al. (2004).[10]
Currently (2019), Perrin's beaked whales have only been found near North Pacific waters off the coast of central and southern California. Stranded Perrin's beaked whales have been found along the Californian coast between Torrey Pines State Reserve, just north of San Diego (32°55’N, 117°15’W) and Fisherman's Wharf, Monterey (36°37’N, 121°55’W).[4] It is believed these whales inhabit the offshore waters of the Pacific coast of North America (and possibly elsewhere in the North Pacific) in waters 1,000 meters deep or more. However, the northern and southern limits of its range are entirely unknown. There is no current information on the home range and migratory behaviors of these whales, although biogeography of beaked whales suggests it does not reach the Equator.
Even though current data suggest an eastern North Pacific distribution, there are too few records to date to draw any conclusions on this. Cookie-cutter shark scars on a calf found in Monterey could be evidence of migratory behavior, because in surface waters cookie-cutter sharks Isistius spp. are limited in their northern distribution,[11] but the occurrence of such scars on cetaceans is not.[12] This suggests either these cetaceans are migratory and pass through the territory of Isistius spp., or the distribution of Isistius spp. extends farther north in deeper waters and attack cetaceans when they dive. The habitat preferences of other beaked whales suggest M. perrini can primarily be found in oceanic waters that are over 1,000 m in depth.
Beaked whales are timid, deep divers who can dive for up to 2 hours, so little is known about the behavior and ecology of Perrin's beaked whales because they are rarely seen. Again, Perrin's beaked whales have not definitely been recorded alive by scientists, so the limited information known about the species is derived from dead individuals that are beached. Some information is assumed based on the shared adaptations and behaviors of the species within the genus Mesoplodon.
Based on the stomach contents of stranded whales, these whales primarily feed on pelagic squid, such as Octopoteuthis deletron; found within the remains of the female's stomach.[4] Some unidentified vertebrate parts were also present. Assuming Perrin's beaked whales share the same diet as other beaked whales, they likely consume octopus and fish as well.
Little is known about the social structure, reproduction, age of sexual maturity, or lifespan of the Perrin's beaked whales, but scars on the bodies of males suggest aggressive competitive behavior.[4] The two adult type specimens were both sexually mature and an analysis of the teeth indicated they were both about 9 years old.[4] For this reason, it can be assumed that males reach sexual maturity around this age or sooner.
The males of this species seem to engage in fights like most other mesoplodonts. Scars from fighting are present on this species, although the precise mechanism of combat is enigmatic: given the teeth's position near the lower jaw tips, it can be expected that the scars consist of two parallel lines. However, it is noted that the scars on the adult male appear to have been made with a single tooth, rather than with two teeth simultaneously, as might be expected in species with apical teeth.[4][13] Single scar lines could suggest they were created by glancing blows rather than direct attacks.
The largest Perrin's beaked whale calf, LACM 088901, at 2.45 m of length, appeared to be independent from its mother. The smallest specimen, USNM 504259, at 2.1 m of length, had a fringed tongue which indicated it was still suckling.[4] Teeth were not present in the immature specimen [verification needed], but are not needed for feeding. The dates when the specimens were found suggest the young start to feed independently in summer. Considering most whales suckle until around age one; this suggests the young are born during the summer half of the year. Since all calves were similar in size, the calves were all estimated to be approximately one year old.
Perrin beaked whales are thought to produce a species-specific frequency modulated (FM) echolocation pulse of BW43.[14] Within a passive acoustics study, signals of BW43 were only detected in southern California at deep sites (1100–1300 m) and are thought to be produced by Perrin's beaked whale, known only from Californian waters.[14]
Data suggests a significant decline in abundance for Mesoplodon spp. in the California Current between 1996 and 2001.[5] Declines are hypothesized to have occurred from the effects of incidental mortality from fishing, impacts of anthropogenic noise (Navy sonar), and ecosystem changes.[5] Since then, the population size of Mesoplodon beaked whales has increased from a mean of 1230 in 2001 to 3439 in 2014 within California Current waters off the U.S. West Coast.[7]
Perrin's beaked whales are threatened by attacks from sharks such as the cookiecutter shark (Isistius brasiliensis). As with their relatives, cookiecutter sharks attack this whale with attempts at biting off chunks of flesh. Such attacks are generally not life-threatening to the whale. It is a host of the thoracican barnacle Conchoderma auritum, and for one or several species of parasitic Phyllobothrium cestodes (possibly Phyllobothrium delphini), this species is either a primary or a dead-end host.
These whales are vulnerable to naval sonar and seismic activity. Currently, there are no whaling threats for this species. Although Mesoplodon whales were never harvested commercially, there have been reports of them being taken by humans from time to time.[4] Bycatch is likely one of the main threats to this deep-water species due to it causing harm or death to whales entangled in fishing gear. According to the IUCN, this species has the potential to become caught in certain types of fishing gear, such as deepwater gill nets, used for capturing large pelagic fish species. Plastic is also seen as a threat to Perrin's beaked whales because it has been found within the stomach contents of stranded individuals.
Possible sightings may have also 1976 possible sightings took place on July 30, 1976 and September 9, 1978, which was the same day the holotype specimen was discovered (Mead 1981). Altogether, there is a marked concentration of sightings between May and September. It is unknown if this has any significance. With scant data at hand, it still appears the best odds of encountering small beaked whales of this species is during the summer months in the area between Santa Catalina and San Clemente Islands and the mainland.
The causes of death of two Perrin's beaked whales can be tentatively inferred. The specimen found in 1997, was starving at the time of death, possibly following a parasite infection (Dalebout et al. 2002). The female found in 1975 had died around May 14 (Mead 1981), and its juvenile was found on May 22. Since the calf was not fully weaned, its death is likely a direct consequence of the loss of its mother.
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{{cite journal}}: Cite journal requires |journal= (help) Perrin's beaked whale (Mesoplodon perrini) is part of the toothed whale suborder and is one of over 90 known cetaceans in existence today. Beaked whales are part of the family Ziphiidae, which are the second most diverse group out of all marine mammals with over 20 species currently recognized. Although diverse, little is understood about these timid, deep divers that can dive for up to two hours. The whales are partially named after their beak shaped jaw, which extends from their small head. The genus name Mesoplodon comes from the Greek meanings of meso- (middle), - hopla (arms), - odon (teeth), and may be translated as 'armed with a tooth in the center of the jaw'.
Perrin's beaked whale was described as a new species in 2002 by Dalebout et al. based on five animals stranding on the coast of California between 1975 and 1997, which were initially identified as other species. The common and specific names of Mesopledon perrini are a tribute to cetologist William F. Perrin. As of May 2019, only six specimens have ever been examined. The first two specimens were found stranded on the California coast in May 1975, other specimens were found in 1978, 1979, September 1997 (a strong El Niño year), and October 2013. The first four individuals were initially identified as Hector's beaked whales (Mesoplodon hectori), but the mtDNA sequence database of beaked whales revealed the specimens were genetically distinct. The fifth was assumed to be a neonate Cuvier's beaked whale (Ziphius cavirostris).
La Perina mezoplodo aŭ Perina bekobaleno (Mesoplodon perrini) estas la plej ĵuse priskribita specio de bekobaleno. La unuaj du specimenoj estis trovitaj en Majo 1975 surstrande en la marbordo de Kalifornio, kaj du pliaj specimenoj estis trovitaj en 1978 kaj 1979, kaj la lasta en Septembro 1997. Ili estis dekomence identigitaj kiel Hektora bekobaleno (Mesoplodon hectori), escepte la plej ĵusa, kiu estis konsideita kiel bebo de Trubeka zifio.[1]
Post inkludo de unu el tiuj specimenoj en sekvenca datumbazo de DNA de bekobalenoj, rezultis, ke ili aspektis distingeblaj el M. hectori (Dalebout et al. 1998). La aliaj "Hektoraj" specimenoj el Kalifornio estis sekve konfirmitaj keil apartenantaj al la sama nepriskribita taksono (Dalebout 2002). La nova specio estiss formale priskribita en 2002 de Dalebout et al.; la koncernaj komuna kaj specia nomoj estas omaĝo al la cetologo William F. Perrin.
Spite la supraĵajn similaĵojn kun la (tute alopatria) Hektora bekobaleno, tiu specio estas tre rilata al la Perua mezoplodo, la venonta plej ĵuse priskribita specio, kaj probable reprezentas ties fratan specion en la Norda Hemisfero.
La Perina mezoplodo ankoraŭ ne estis definitive registrita viva fare de sciencistoj. Tamen, ties aspekto estas konata el la surstrandigitaj specimenoj, kaj pro ties identeco kiel nova specio, verŝajnas ke la kvar supozitaj Hektoraj bekobalenoj, kiuj estis viditaj ĉe Kalifornio en 1976 kaj 1978, estis fakte tiu specio (Mead 1981, Dalebout et al. 2002).
La Perina mezoplodo ne povas esti identigita absolute certe en la maro. Tamen, la kombino de malgrando, aspekto kaj supozebla teritorio malverŝajnigas konfuzon. Strandigitaj specimenoj povas esti identigitaj kiel tiu specio ĉu pere de DNA kaj/aŭŭ pere de anatomiaj detaloj de la kranio.(Dalebout et al. 2002)
Tiu specio havas la tre tipan korpoformon de mezoplodoj, kun malgranda kapo, longa korpo, kaj profunda vosto. La beko de tiu baleno estas pli mallonga ol tiuj de aliaj mezoplodoj scepte pri la Hektoro kaj la Nana bekobalenoj, speciale ĉe junaj individuoj. La buŝolinio de tiu specio estas rekta, kaj la melono formas malgrandan kernon kun krescentforma spirtruo kun antaŭen indikantaj pintoj. La dentoj de tiu specio estas tre grandaj al la buŝpinto. La matura maskla specimeno estis 3.9 metrojn longa kaj la ino estis 4.4 metrojn longa; la nematuraj maskloj mezuris inter 2.1 kaj 2.45 metrojn.
La koloraro estas malhelgriza supre kaj blanka sube en la holotipa masklo, kun pli helgriza sube ĉe la vosto. Estas blanka makulo ĉe la umbiliko. La koloro de inoj estas nekonata, ĉar la nura specimeno estis tro malkomponita.
Idoj estas helaj al malhelaj grizaj pinte, kaj blankaj sube, inklude la malsupran makzelon kaj gorĝon; la suba vosto estas helgriza. Estas malhela "masko" en la kapo, el la anguloj de la buŝo al la okulregiono, la beko kaj la melono, kaj estas blankaj strioj en la vosta subaĵo. La maskla plenkreskulo havis la tipajn blankajn cikatrostriojn el lukho kun samspecianoj. Nur masklaj plenkreskuloj ŝajne havas dentojn, kaj eĉ tiuj nur du, kongrue kun aliaj specijo de la genro Mesoplodon. En tiu bekobaleno, la dentoj estas ĉe la pinto de la malsupra makzelo.
La Perina mezoplodo aŭ Perina bekobaleno (Mesoplodon perrini) estas la plej ĵuse priskribita specio de bekobaleno. La unuaj du specimenoj estis trovitaj en Majo 1975 surstrande en la marbordo de Kalifornio, kaj du pliaj specimenoj estis trovitaj en 1978 kaj 1979, kaj la lasta en Septembro 1997. Ili estis dekomence identigitaj kiel Hektora bekobaleno (Mesoplodon hectori), escepte la plej ĵusa, kiu estis konsideita kiel bebo de Trubeka zifio.
Post inkludo de unu el tiuj specimenoj en sekvenca datumbazo de DNA de bekobalenoj, rezultis, ke ili aspektis distingeblaj el M. hectori (Dalebout et al. 1998). La aliaj "Hektoraj" specimenoj el Kalifornio estis sekve konfirmitaj keil apartenantaj al la sama nepriskribita taksono (Dalebout 2002). La nova specio estiss formale priskribita en 2002 de Dalebout et al.; la koncernaj komuna kaj specia nomoj estas omaĝo al la cetologo William F. Perrin.
Spite la supraĵajn similaĵojn kun la (tute alopatria) Hektora bekobaleno, tiu specio estas tre rilata al la Perua mezoplodo, la venonta plej ĵuse priskribita specio, kaj probable reprezentas ties fratan specion en la Norda Hemisfero.
La Perina mezoplodo ankoraŭ ne estis definitive registrita viva fare de sciencistoj. Tamen, ties aspekto estas konata el la surstrandigitaj specimenoj, kaj pro ties identeco kiel nova specio, verŝajnas ke la kvar supozitaj Hektoraj bekobalenoj, kiuj estis viditaj ĉe Kalifornio en 1976 kaj 1978, estis fakte tiu specio (Mead 1981, Dalebout et al. 2002).
El zifio de Perrin (Mesoplodon perrini) es una especie de cetáceo odontoceto de la familia Ziphidae. Es a una de las especies de zifio más recientes en cuanto a catalogación. Ejemplares varados en 1975 frente a las costas de California fueron identificadas inicialmente como zifios de Hector. Estudios posteriores de ADN demostraron que correspondía a una nueva especie, catalogándose el año 2002. Recibe el nombre en honor al cetologo William F. Perrin.
La combinación de pequeño tamaño, apariencia y coloración, hace poco probable una confusión. Especímenes varados puede ser identificado por su secuencia de ADN y/o detalles anatómicos del cráneo. (Dalebout et al. 2002) El macho adulto mide unos 4 metros longitud, y la hembra unos 4,5.[1]
Hasta ahora sólo se han encontrado varados en las costa de California entre San Diego y Monterey. No existen estimaciones de su población ni estado de conservación.
El zifio de Perrin (Mesoplodon perrini) es una especie de cetáceo odontoceto de la familia Ziphidae. Es a una de las especies de zifio más recientes en cuanto a catalogación. Ejemplares varados en 1975 frente a las costas de California fueron identificadas inicialmente como zifios de Hector. Estudios posteriores de ADN demostraron que correspondía a una nueva especie, catalogándose el año 2002. Recibe el nombre en honor al cetologo William F. Perrin.
Mesoplodon perrini Mesoplodon generoko animalia da. Artiodaktiloen barruko Ziphiidae familian sailkatuta dago.
Mesoplodon perrini Mesoplodon generoko animalia da. Artiodaktiloen barruko Ziphiidae familian sailkatuta dago.
Mesoplodon perrini
La baleine à bec de Perrin (Mesoplodon perrini), ou Mésoplodon de Perrin, est une espèce de cétacés de la famille des Ziphiidae.
Cette espèce n'est connue que par des échouages survenus sur les côtes californiennes et par quelques observations en mer.
Taille : 4 mètres. Il existe peut-être un dimorphisme sexuel concernant la taille : les femelles pourraient être un peu plus grandes (4,4 mètres) que les mâles (3,9 mètres). Les jeunes mesurent environ 2 mètres à 2 mètres 50.
Petit Mésoplodon de couleur majoritairement grise, s'éclaircissant à mesure que l'on se rapproche du ventre de couleur blanche. Une zone plus sombre entourant les yeux et la base du rostre pourrait être un signe distinctif de l'espèce, mais le manque d'individu observé ou retrouvé rend difficile l'établissement d'une description précise de la coloration. Chez les jeunes, le sommet du dos et l'aileron peuvent être de couleur pâle.
Rostre court, muni chez le mâle de 2 dents dépassant de 3 cm à l'extrémité de la mâchoire inférieure. Le melon forme une petite protubérance sur le sommet du crâne.
Présence d'un aileron dorsal triangulaire à l'arrière du dos.
Très peu d'observations ont pu être réalisées, mais il semblerait qu'il se déplace seul ou en petit groupe (2 spécimens ont été aperçus côte à côte en 1976 et un spécimen solitaire en 1978)[1].
Il peut être confondu avec les autres Mésoplodons du Pacifique Nord (Mésoplodon de Hubbs, de Nishiwaki, de Stejneger, de Blainville et pygmée). Seuls les individus mâles adultes peuvent être différenciés des autres lors d'une observation en mer. En effet, les Mésoplodons mâles sont caractérisés par la présence, à l'âge adulte, de 2 dents plus ou moins visibles selon les espèces. Celles du Mésoplodon de Perrin sont situées à l'extrémité du rostre, à l'inverse des autres espèces qui les présentes à la base ou au centre de celui-ci.
Les mâles Mésoplodon d'Hector adultes possèdent eux aussi 2 dents visibles à l'avant du rostre, mais cette espèce n'est présente que dans l'hémisphère sud[2].
Son aire de répartition est mal connue. Le Mésoplodon de Perrin n'est connu que par 5 spécimens retrouvés échoués sur les côtes de Californie entre 1975 et 1997. On le suppose présent dans tout le Pacifique Nord.
Il passerait la majeure partie de son temps en eau profonde.
Il semble se nourrir de calamars mésopélagiques (entre 200 et 1 000 mètres de profondeur).
Mesoplodon perrini
La baleine à bec de Perrin (Mesoplodon perrini), ou Mésoplodon de Perrin, est une espèce de cétacés de la famille des Ziphiidae.
Cette espèce n'est connue que par des échouages survenus sur les côtes californiennes et par quelques observations en mer.
Il mesoplodonte di Perrin (Mesoplodon perrini) è un cetaceo odontoceto della famiglia Ziphiidae. È la specie di mesoplodonte descritta più di recente. Venne trovata per la prima volta nel maggio 1975 sulla costa della California, e fino al settembre 1997 furono disponibili solamente quattro esemplari di questa specie. Questi furono identificati inizialmente come mesoplodonte di Hector (Mesoplodon hectori), eccetto l'esemplare ritrovato più di recente, che venne considerato un piccolo di zifio. La seguente introduzione di uno di questi esemplari in un database di sequenze di DNA mitocondriale di mesoplodonti, mostrò che questa specie era ben distinta da M. hectori (Dalebout et al. 1998). In seguito venne confermato che gli altri esemplari "di Hector" provenienti dalla California appartenevano allo stesso nuovo taxon (Dalebout 2002). La nuova specie venne descritta per la prima volta nel 2002 da Dalebout et al.; i suoi nomi comune e specifico sono un tributo al cetologo William F. Perrin.
Nonostante le similitudini superficiali con il mesoplodonte di Hector (del tutto allopatrico), questa specie è strettamente imparentata con il mesoplodonte pigmeo, un'altra specie scoperta recentemente, e rappresenta probabilmente la sua specie sorella dell'emisfero settentrionale.
Dagli scienziati non è stato ancora registrato un avvistamento confermato del mesoplodonte di Perrin. Comunque, il suo aspetto è noto grazie agli esemplari spiaggiati, e in seguito al suo riconoscimento come nuova specie, sembra molto probabile che 3 supposti "mesoplodonti di Hector" avvistati al largo della California nel 1976 (2 individui) e nel 1978 (un individuo) appartengano a questa specie (Mead 1981, Dalebout et al. 2002).
Il mesoplodonte di Perrin non può essere identificato in mare con assoluta certezza. Comunque, la combinazione di piccole dimensioni, aspetto e areale presunto rende difficile la confusione con altre specie. Gli esemplari spiaggiati possono venire identificati come appartenenti a questa specie sia dai dati della sequenza del DNA che dai dettagli anatomici del cranio (Dalebout et al. 2002).
Questa specie ha la forma del corpo tipica di un mesoplodonte, con testa piccola, corpo lungo e coda priva di seno interlobare. Il rostro di questa balena è più corto di quello di ogni altro mesoplodonte, eccezion fatta per quello del mesoplodonte di Hector e del mesoplodonte pigmeo, soprattutto negli individui giovani. La rima boccale di questa specie è diritta, il melone forma una piccola protuberanza e lo sfiatatoio è a forma di mezzaluna con le punte rivolte in avanti. I denti di questa specie sono abbastanza grandi e sono situati verso la punta della bocca. Su questa specie sono presenti delle scanalature sulla gola. L'esemplare maschio maturo misurava 3,9 metri di lunghezza e la femmina ne misurava 4,4; i maschi immaturi erano lunghi tra i 2,1 e i 2,45 metri.
Nell'olotipo maschio la colorazione è grigio scura sopra e bianca sotto, con la regione inferiore della pinna caudale grigio più chiaro. Vicino all'ombelico è presente una macchia bianca. La colorazione delle femmine è ignota, dal momento che l'unico esemplare era piuttosto decomposto. I piccoli sono grigio chiaro o scuro sopra, e bianco sotto, mascella inferiore e gola comprese; la faccia inferiore delle pinne è grigio più chiaro. Sulla testa c'è una "maschera" scura, che va dagli angoli della bocca fino alla regione oculare, al rostro e al melone, e sono presenti strisce bianche sulla regione inferiore della coda. Il maschio adulto aveva le tipiche strisce di cicatrici provocate dai combattimenti con i conspecifici. Solo il maschio adulto sembra che abbia i denti, anche se sono solamente due, come nelle altre specie di Mesoplodon. Nel mesoplodonte di Perrin, i denti sono posti vicino alla punta della mascella inferiore e hanno pressappoco la forma di triangoli equilateri quando vengono visti lateralmente e sono posti ancora nella mascella; da questo punto di vista ricordano i denti frontali della balena dal becco di Baird più che quelli delle specie di Mesoplodon più simili nell'aspetto (Dalebout et al. 2002).
Una fotografia di un probabile esemplare vivente - uno dei 2 osservati nel 1976 - viene ritenuta da Rice (1978: 95) appartenente ad un Mesoplodon carlhubbsi, una specie molto più grande anch'essa originaria delle acque al largo della California. Allo scopo dell'individuazione di questo animale furono anche d'aiuto le registrazioni delle vocalizzazioni.
Questa specie è stata trovata solamente sulle coste della California tra San Diego e Monterey. È probabile che viva al largo della costa pacifica del Nordamerica - e forse anche altrove nel Pacifico settentrionale - in acque profonde 1000 metri o più. Comunque, le prove mancano e i limiti settentrionali e meridionali del suo areale sono completamente sconosciuti (sebbene la biogeografia delle balene dal becco suggerisca che non raggiungono l'equatore). Finora non è stato possibile stimare la popolazione o assegnarle uno status di conservazione. L'isola di San Clemente possiede una struttura di ricerca sui sonar della marina statunitense; in passato queste ricerche sono state causa di spiaggiamenti di cetacei (vedi Ziphiidae).
Non sappiamo nulla sul comportamento in vita di questa specie. Comunque, dal momento che è simile in apparenza a tutti gli altri Mesoplodon, possono essere fatte alcune ipotesi ben fondate.
I maschi di questa specie sembrano ingaggiare combattimenti come la maggior parte degli altri mesoplodonti. In questa specie sono presenti le cicatrici causate dai combattimenti, sebbene il meccanismo preciso di queste lotte sia enigmatico: data la posizione dei denti sulla punta della mascella inferiore, si può aspettare che le cicatrici consistano di due linee parallele; sul maschio adulto era presente, comunque, solo una singola linea di cicatrici e questo suggerisce che si sia trattata solamente di una strusciata fugace, piuttosto che di un attacco diretto.
Per le analisi furono disponibili pochi contenuti stomacali. Presumibilmente, questa specie si nutre di calamari pelagici (come Octopoteuthis deletron, i cui resti vennero ritrovati nello stomaco della femmina) e forse di piccoli pesci, come altre balene dal becco.
L'immaturo più grande, LAM 088901, di 2,45 metri di lunghezza, sembrava indipendente dalla madre. D'altra parte, l'esemplare più piccolo conosciuto, USNM 504259, aveva la lingua frangiata, fatto che indica che succhiava ancora. Negli immaturi non erano presenti i denti, ma questi non sono necessari per la nutrizione. I dati presi al ritrovamento di questi esemplari suggeriscono che i giovani iniziano a nutrirsi da soli in estate; considerando che la maggior parte dei cetacei succhiano fino ad un anno d'età, si può sostenere che i giovani erano nati non prima dell'estate precedente. Di conseguenza, dal momento che avevano entrambi dimensioni simili, gli immaturi avevano probabilmente circa un anno d'età. Gli adulti avevano tutti e due un'età stimata sui 9 anni al momento della morte.
Si possono dedurre le cause della morte di 2 animali: l'esemplare del 1997 era affamato al momento della morte, forse a causa di un'infezione parassitaria (Dalebout et al. 2002). La femmina del 1975 morì intorno al 14 maggio (Mead 1981); dato che il giovane trovato il 22 maggio era in apparenza il suo piccolo e che non era ancora stato completamente svezzato, la sua morte sembra essere la conseguenza diretta della perdita della madre.
Come accade anche ai loro parenti, gli squali cookie-cutter attaccano questi zifidi per cercare di portar via brandelli di carne. Questi attacchi non sono generalmente pericolosi per i mesoplodonti. Questi ultimi ospitano il cirripede toracico Conchoderma auritum e una o alcune specie di cestodi parassiti del genere Phyllobothrium (forse Phyllobothrium delphini) che possono convivere con l'animale pacificamente o portarlo alla morte.
I possibili avvistamenti del 1976 avvennero il 30 luglio e quello del 1978 il 9 settembre - lo stesso giorno della scoperta dell'esemplare olotipo (Mead 1981). Nel complesso, c'è un'evidente concentrazione di avvistamenti tra maggio e settembre. Non si sa, però, se questo fatto ha un motivo preciso. Ciononostante, data la scarsità dei dati disponibili, sembra che il modo migliore per incontrare questa enigmatica specie sia cercarla durante i mesi estivi nell'area tra le isole di Santa Catalina e San Clemente e la terraferma.
Il mesoplodonte di Perrin (Mesoplodon perrini) è un cetaceo odontoceto della famiglia Ziphiidae. È la specie di mesoplodonte descritta più di recente. Venne trovata per la prima volta nel maggio 1975 sulla costa della California, e fino al settembre 1997 furono disponibili solamente quattro esemplari di questa specie. Questi furono identificati inizialmente come mesoplodonte di Hector (Mesoplodon hectori), eccetto l'esemplare ritrovato più di recente, che venne considerato un piccolo di zifio. La seguente introduzione di uno di questi esemplari in un database di sequenze di DNA mitocondriale di mesoplodonti, mostrò che questa specie era ben distinta da M. hectori (Dalebout et al. 1998). In seguito venne confermato che gli altri esemplari "di Hector" provenienti dalla California appartenevano allo stesso nuovo taxon (Dalebout 2002). La nuova specie venne descritta per la prima volta nel 2002 da Dalebout et al.; i suoi nomi comune e specifico sono un tributo al cetologo William F. Perrin.
Nonostante le similitudini superficiali con il mesoplodonte di Hector (del tutto allopatrico), questa specie è strettamente imparentata con il mesoplodonte pigmeo, un'altra specie scoperta recentemente, e rappresenta probabilmente la sua specie sorella dell'emisfero settentrionale.
Dagli scienziati non è stato ancora registrato un avvistamento confermato del mesoplodonte di Perrin. Comunque, il suo aspetto è noto grazie agli esemplari spiaggiati, e in seguito al suo riconoscimento come nuova specie, sembra molto probabile che 3 supposti "mesoplodonti di Hector" avvistati al largo della California nel 1976 (2 individui) e nel 1978 (un individuo) appartengano a questa specie (Mead 1981, Dalebout et al. 2002).
Mesoplodon perrini, ofwel de Spitssnuitdolfijn van Perrini, is een spitssnuitdolfijn uit het geslacht Mesoplodon die bekend is van vijf exemplaren (een volwassen mannetje als holotype, een volwassen vrouwtje en drie onvolwassen mannetjes) die tussen 1975 en 1997 op de kust van Californië (Verenigde Staten) gestrand zijn. Deze exemplaren werden aanvankelijk als de Hectorspitssnuitdolfijn geïdentificeerd, op één dier na dat als een onvolwassen dolfijn van Cuvier werd gedetermineerd, en pas in 2002 als een nieuwe soort beschreven door Nieuw-Zeelandse en Amerikaanse onderzoekers. M. perrini lijkt morfologisch het meest op de Hectorspitssnuitdolfijn, maar is genetisch nauwer verwant aan de Humboldtspitssnuitdolfijn. De soort is genoemd naar Dr. W.F. Perrin, een Amerikaanse deskundige op het gebied van walvissen die onder andere twee van de vijf bekende exemplaren van M. perrini heeft gevonden.
Net als andere Mesoplodon heeft M. perrini een relatief kleine kop, een lang achterlijf en een korte staart. De bovenkant van het lichaam is grijs, de onderkant wit. Deze soort is morfologisch van andere vormen van Mesoplodon te onderscheiden door een combinatie van kenmerken aan de schedel. Het dier heeft 46 tot 50 wervels; de eerste twee nekwervels zijn samengesmolten. De totale lengte bedraagt 443 en 390 mm voor de twee volwassen exemplaren en 210 tot 245 mm voor de drie onvolwassen dieren, de schedellengte 424 tot 594 mm voor alle exemplaren.
Deze soort eet waarschijnlijk voornamelijk inktvissen, net als andere spitssnuitdolfijnen, al is er ook een bot van een onidentificeerbare gewervelde in de maag van een van de dieren gevonden. De twee volwassen exemplaren waren waarschijnlijk zo'n negen jaar oud, terwijl van de drie kalveren er één waarschijnlijk al gespeend was en een ander nog gezoogd werd. Er zijn verschillende parasieten op de dieren gevonden.
Mesoplodon perrini, ofwel de Spitssnuitdolfijn van Perrini, is een spitssnuitdolfijn uit het geslacht Mesoplodon die bekend is van vijf exemplaren (een volwassen mannetje als holotype, een volwassen vrouwtje en drie onvolwassen mannetjes) die tussen 1975 en 1997 op de kust van Californië (Verenigde Staten) gestrand zijn. Deze exemplaren werden aanvankelijk als de Hectorspitssnuitdolfijn geïdentificeerd, op één dier na dat als een onvolwassen dolfijn van Cuvier werd gedetermineerd, en pas in 2002 als een nieuwe soort beschreven door Nieuw-Zeelandse en Amerikaanse onderzoekers. M. perrini lijkt morfologisch het meest op de Hectorspitssnuitdolfijn, maar is genetisch nauwer verwant aan de Humboldtspitssnuitdolfijn. De soort is genoemd naar Dr. W.F. Perrin, een Amerikaanse deskundige op het gebied van walvissen die onder andere twee van de vijf bekende exemplaren van M. perrini heeft gevonden.
Net als andere Mesoplodon heeft M. perrini een relatief kleine kop, een lang achterlijf en een korte staart. De bovenkant van het lichaam is grijs, de onderkant wit. Deze soort is morfologisch van andere vormen van Mesoplodon te onderscheiden door een combinatie van kenmerken aan de schedel. Het dier heeft 46 tot 50 wervels; de eerste twee nekwervels zijn samengesmolten. De totale lengte bedraagt 443 en 390 mm voor de twee volwassen exemplaren en 210 tot 245 mm voor de drie onvolwassen dieren, de schedellengte 424 tot 594 mm voor alle exemplaren.
Deze soort eet waarschijnlijk voornamelijk inktvissen, net als andere spitssnuitdolfijnen, al is er ook een bot van een onidentificeerbare gewervelde in de maag van een van de dieren gevonden. De twee volwassen exemplaren waren waarschijnlijk zo'n negen jaar oud, terwijl van de drie kalveren er één waarschijnlijk al gespeend was en een ander nog gezoogd werd. Er zijn verschillende parasieten op de dieren gevonden.
A baleia-bicuda-de-perrin (Mesoplodon perrini) é um cetáceo da família dos zifiídeos (Ziphiidae) encontrado no Pacífico Norte na costa da América do Norte.
A baleia-bicuda-de-perrin (Mesoplodon perrini) é um cetáceo da família dos zifiídeos (Ziphiidae) encontrado no Pacífico Norte na costa da América do Norte.
Mesoplodon perrini[2][3][4] är en däggdjursart som beskrevs av Dalebout, Mead, Baker, Baker och Van Helden 2002. Mesoplodon perrini ingår i släktet Mesoplodon och familjen näbbvalar.[5][6] IUCN kategoriserar arten globalt som otillräckligt studerad.[1] Inga underarter finns listade i Catalogue of Life.[5]
Arten förekommer i Stilla havet väster om Kalifornien och halvön Baja California (Mexiko). Den lever i djupare havsområden som är minst 1000 meter djup. Denna näbbval äter bläckfiskar och andra havslevande ryggradslösa djur.[1]
Wikimedia Commons har media som rör Mesoplodon perrini.
Wikispecies har information om Mesoplodon perrini.
Mesoplodon perrini är en däggdjursart som beskrevs av Dalebout, Mead, Baker, Baker och Van Helden 2002. Mesoplodon perrini ingår i släktet Mesoplodon och familjen näbbvalar. IUCN kategoriserar arten globalt som otillräckligt studerad. Inga underarter finns listade i Catalogue of Life.
Arten förekommer i Stilla havet väster om Kalifornien och halvön Baja California (Mexiko). Den lever i djupare havsområden som är minst 1000 meter djup. Denna näbbval äter bläckfiskar och andra havslevande ryggradslösa djur.
Wikimedia Commons'ta Mesoplodon perrini ile ilgili çoklu ortam belgeleri bulunur. 
Wikispecies'te Mesoplodon perrini ile ilgili detaylı taksonomi bilgileri bulunur. Mesoplodon perrini, yeni dönemde tanımlanan gagalı balina türü. Türe ait örnekler 1970'li yıllarda ortaya çıkarılmıştır. İlk örnekler 1975 yılında, ardından 1978 ve 1979 yıllarında Kaliforniya sahillerinde bulunmuştur. Son örnek Eylül 1997'de bulunmuştur. Bu türler başta Hektor gagalı balinası ve Cuvier gagalı balinası olarak tanımlanmalarına rağmen, sonradan 2002 yılında yapılan DNA merkezli bir çalışmada tür yeni olarak tanımlanmış ve William F. Perrin'in adı verilerek "Perrin gagalı balinası" olarak anılmıştır.[1]
Mesoplodon perrini türünü canlı kaydeden bir bilim insanı veya araştırmacı henüz olmamıştır. Ancak karaya vuran örneklerden yeni bir tür olduğu belirlenmiştir.[1][2][3]
Mesoplodon perrini, yeni dönemde tanımlanan gagalı balina türü. Türe ait örnekler 1970'li yıllarda ortaya çıkarılmıştır. İlk örnekler 1975 yılında, ardından 1978 ve 1979 yıllarında Kaliforniya sahillerinde bulunmuştur. Son örnek Eylül 1997'de bulunmuştur. Bu türler başta Hektor gagalı balinası ve Cuvier gagalı balinası olarak tanımlanmalarına rağmen, sonradan 2002 yılında yapılan DNA merkezli bir çalışmada tür yeni olarak tanımlanmış ve William F. Perrin'in adı verilerek "Perrin gagalı balinası" olarak anılmıştır.
Mesoplodon perrini türünü canlı kaydeden bir bilim insanı veya araştırmacı henüz olmamıştır. Ancak karaya vuran örneklerden yeni bir tür olduğu belirlenmiştir.
Mesoplodon perrini схожий за формою на інших членів цього роду, з короткою головою і хвостом, довгим животом. Як і його найближчий родич, Mesoplodon hectori і Mesoplodon peruvianus, вид має відносно коротку морду. Рот утворює пряму лінію, і ряд канавок присутній на горлі. Дорослі М. perrini мають темно-сірий забарвлення на спині яке переходить в білу на їх низу. Неповнолітні особи мають дещо інше забарвлення з білою областю навколо горла і темно-сірого плями навколо рострума і очей. Тільки оригінальні п'ять берегових зразків були точно виміряні. Доросла самиця була приблизно 4,4 метра від носа до хвоста, а дорослий самець був 3,9 метрів у довжину. Інші три зразки були неповнолітні самці.
Всі п'ять зразків досі розглянуті були з південної і центральної Каліфорнії (між 32 ° і 37 ° N), і цілком імовірно, що цей вид є ендемічним в північній частині Тихого океану (можливо, навіть східній частині Північної частини Тихого океану). Як і інші члени роду, цей вид мабуть воліє океанічні води більше, ніж в 1000 м в глибину, спостереження цього виду сталося в глибоких водах.
Ґрунтуючись на обмеженій вибірці вмісту шлунка, ймовірно, харчується в основному кальмарами (у тому числі Octopoteuthis). Відомими хижаками є акули і люди.
Всі підтверджені записи були з викидання на берег (плюс два можливих спостережень), так що нічого не відомо про потенційні загрози. Ремнезуби цього роду були вбиті іноді китобоями, але на даний час вони не є основними цілями будь-якого полювання. Заплутаність в риболовецьких снастях, особливо зябрових мереж в глибокій воді, ймовірно, є найбільш серйозною загрозою. Цей вид, як і інші ремнезуби, швидше за все, вразливий до гучних антропогенних звуків, наприклад, які генеруються гідролокаторами і сейсморозвідкою.
Як вид з, мабуть обмеженим поширенням, може бути уразливим до наслідків зміни клімату, оскільки потепління океану може призвести до зміщення або скорочення ареалу. Наслідки таких змін на цей вид невідомі.
Дані з викинутих на берег особин кількох подібних видів показують, що вони проковтнули викинуті пластмасові предмети, які можуть в кінцевому підсумку призвести до смерті; цей вид також може бути в небезпеці.
Cá voi mõm khoằm Perrin, tên khoa học Mesoplodon perrini, là một loài động vật có vú trong họ Ziphiidae, bộ Cetacea. Loài này được Dalebout et al. mô tả năm 2002.[2]
Cá voi mõm khoằm Perrin, tên khoa học Mesoplodon perrini, là một loài động vật có vú trong họ Ziphiidae, bộ Cetacea. Loài này được Dalebout et al. mô tả năm 2002.
ペリンオウギハクジラ（ペリン扇歯鯨、Mesoplodon perrini）はハクジラ亜目アカボウクジラ科オウギハクジラ属に属するクジラである。
2002年に新種として報告されており、オウギハクジラ類としては最も新しく発見された種である（2007年3月時点）。1975年、アメリカ合衆国カリフォルニア州の沖で発見された個体が最初の報告であり、1997年9月までに他に4個体が報告されている。当時は、最初に見つかった個体はアカボウクジラ、他の4個体はニュージーランドオウギハクジラとそれぞれ考えられていた。最近の遺伝子解析により、これらの5個体はアカボウクジラやニュージーランドオウギハクジラなどではない同一の別種であることが明らかになった。1970年代、カリフォルニア州の沖合での複数の目撃例は、当時はニュージーランドオウギハクジラであると思われたが、おそらくペリンオウギハクジラであっただろうと考えられる。
ペリンオウギハクジラは、外観はニュージーランドオウギハクジラに良く似ているが、むしろピグミーオウギハクジラ（ペリンオウギハクジラに次いで2番目に新しく発見された種）に密接に関係している。
種小名の perrini はアメリカ合衆国の海棲哺乳類学者であるW. F. Perrinに由来する。
ペリンオウギハクジラの体型はオウギハクジラ類としては典型的であり、小さな頭部、長い胴部、幅広い尾を有する。頭部メロンは膨らんでいる。唇の形状は直線に近く、口吻は他のオウギハクジラ類（ニュージーランドオウギハクジラとペリンオウギハクジラを除く）よりも短い。また、喉溝 (throat groove) を有する。歯のサイズは比較的大きく、後側（尾側）に傾斜している。
雄の体色は、背側は濃い灰色で腹側は白で、臍の周囲や尾びれの腹側に灰色の斑点がある。雌の体色については、唯一の雌の資料の状態が良くなかったため、不明である。子供の体色は、背側は明るい灰色あるいは濃い灰色であり、下顎や喉を含む腹側は白である。体表にはダルマザメによる噛み傷などを有することが多い。
成体の体長は雄が約3.9m、雌が約4.4mである。
ペリンオウギハクジラはアメリカ合衆国カリフォルニア州のサンディエゴからモントレーまでの海域でのみ観察されている。おそらく他の海域にも生息していると考えられるが、証拠はない。生息数は不明である。
他のオウギハクジラ類と同じく、雄は同種の雄と闘うことがある。
不明な点が多く、情報不足である。
この項目は、動物に関連した書きかけの項目です。この項目を加筆・訂正などしてくださる協力者を求めています（Portal:生き物と自然／プロジェクト:生物）。 ペリンオウギハクジラ（ペリン扇歯鯨、Mesoplodon perrini）はハクジラ亜目アカボウクジラ科オウギハクジラ属に属するクジラである。
2002年に新種として報告されており、オウギハクジラ類としては最も新しく発見された種である（2007年3月時点）。1975年、アメリカ合衆国カリフォルニア州の沖で発見された個体が最初の報告であり、1997年9月までに他に4個体が報告されている。当時は、最初に見つかった個体はアカボウクジラ、他の4個体はニュージーランドオウギハクジラとそれぞれ考えられていた。最近の遺伝子解析により、これらの5個体はアカボウクジラやニュージーランドオウギハクジラなどではない同一の別種であることが明らかになった。1970年代、カリフォルニア州の沖合での複数の目撃例は、当時はニュージーランドオウギハクジラであると思われたが、おそらくペリンオウギハクジラであっただろうと考えられる。
ペリンオウギハクジラは、外観はニュージーランドオウギハクジラに良く似ているが、むしろピグミーオウギハクジラ（ペリンオウギハクジラに次いで2番目に新しく発見された種）に密接に関係している。
種小名の perrini はアメリカ合衆国の海棲哺乳類学者であるW. F. Perrinに由来する。
페린부리고래(Perrin's beaked whale, Mesoplodon perrini)는 가장 최근에 기술된 이빨부리고래이다. 1975년 캘리포니아주 해안에 좌초한 고래로부터 2개의 표본을 처음 발견했으며, 1978년과 1979년에 2점 그리고 1997년 9월에 마지막으로 수집했다. 가장 마지막에 수집한 표본은 퀴비에부리고래의 새끼로 추정했으며, 나머지는 처음에 헥토르부리고래로 인식했다.[2]
페린부리고래(Perrin's beaked whale, Mesoplodon perrini)는 가장 최근에 기술된 이빨부리고래이다. 1975년 캘리포니아주 해안에 좌초한 고래로부터 2개의 표본을 처음 발견했으며, 1978년과 1979년에 2점 그리고 1997년 9월에 마지막으로 수집했다. 가장 마지막에 수집한 표본은 퀴비에부리고래의 새끼로 추정했으며, 나머지는 처음에 헥토르부리고래로 인식했다.
