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The communication habits of M. grayi are unknown, but those of other whales have been well studied. Whales are famous for their combination of songs, squeals, grunts, clicks, and clacks. Because water serves as a much better transmission medium for sound than air, evolution has clearly centered on vocal communication rather than any other form. The timing of whale communications, along with their content, may signal position, identity, threats, or food to other members of a pod or to other pods.
The most common beaked whales, Blainville's Beaked whales, have been observed to use particular patterns of clicks when herding schools of prey, possibly to confuse them. It has been proposed that M. grayi uses similar methods, but further information is unavailable.
Some tactile communication most likely occurs between mates, as well as between mothers and their offspring. If the tusks of these animals are used in physical competition, as scarring patterns on the head indicate, this is another form of tactile communication which should be noted.
Females may signal their sexual readiness with chemical cues.
Communication Channels: tactile ; acoustic ; chemical
Other Communication Modes: choruses
Perception Channels: visual ; tactile ; acoustic ; chemical
M. grayi is protected by the Marine Mammal Protection Act of 1972. These laws are a strict guideline protecting marine mammals and their habitats. For M. grayi in particular, there is not enough information to determine its appropriate conservation status. Original sightings were so rare that the animals were thought to be close to extinction, but the increasing number of reliable sightings suggests there is a larger, more stable population than believed.
IUCN Red List of Threatened Species: no special status
Natural preadators of Gray's Beaked whales are unknown. The natural coloration pattern (dark on the dorsal side, lighter on the belly) makes these animals harder to see from above (where they blend in with darker water below) and from below (where they blend in with lighter water above it).
This species is not known to be commercially hunted, but the possibilty that individuals have been taken by fishing operations cannot be excluded. However, the known population of M. grayi generally resides outside of most commercial fishing operations and the impact of these operations is probably limited.
Anti-predator Adaptations: cryptic
Gray’s Beaked whales, like all members of Ziphiidae, are medium sized whales with a distinct beak. They are 5.0 to 6.0 m in length and weigh around 5 tons (10,000 pounds). M. grayi is distinct from all other beaked whales (except for Tasmacetus shepherdi) in that it does not lack upper teeth; rather, it has a row of 17 to 22 teeth lining each side of the upper jaw.
The coloration pattern of M. grayi is similar to other beaked whales, with dark brown to gray on the back and flanks, and light gray to white on the underside. The beak is characteristically white or light colored with white flecks extending to the throat. There are also conspicuous white markings around the navel, genitals, and anal regions.
One of the most conspicuous features of members of the genus Mesoplodon is the single pair of enlarged triangular tusks in the lower jaw. The location of these tusks is set farther back in the mouth than in other beaked whales. The exact function of these tusks is unknown, but the pattern of scarring on the head and body of examined individuals indicates that fighting may occur, most likely for mates . Some Mesoplodon have a hardened bone in their skulls, acting like a shield while fighting. These tusks were originally thought to erupt only in males. However, more recent information shows that the tusks erupt in both sexes. Beached females with erupting tusks, have been discovered recently with high frequency.
Average mass: 5000 kg.
Range length: 5.5 to 6.0 m.
Sexual Dimorphism: sexes alike; ornamentation
Other Physical Features: endothermic ; bilateral symmetry
There is no information on the lifespan of M. grayi and there have been no reports of attempts to keep any animals in captivity.
The particular waters M. grayi occupies are not well known. Animals are generally spotted in waters deeper than 2000 m, but animals frequent shallower waters and have often been found beached in New Zealand.
Range depth: 2000 to 0 m.
Habitat Regions: temperate ; tropical ; saltwater or marine
Aquatic Biomes: pelagic ; coastal
The general distribution of Gray's beaked whales, Mesoplodon grayi , is in the oceans of the southern hemisphere, south of 30 degrees latitude. Original sightings were off the coast of New Zealand and Eastern Australia east to Argentina and Chile. However, recent sightings near South Africa, north to Madagascar, and in the Indian Ocean east to Australia confirm its circumpolar home range. There has been one confirmed live animal sighting in the northern hemisphere, off the coast of The Netherlands, but there have been no other indications of a North Atlantic population (IUCN, 1991). Though there are nineteen species in the Family Ziphiidae (Beaked Whales), they are rarely seen and poorly studied. There is no reliable information on migratory habits, if any, of this species.
Biogeographic Regions: indian ocean (Native ); atlantic ocean (Native ); pacific ocean (Native )
Beaked whales of the genus Mesoplodon eat squid almost exclusively, usually members of the families Ommastrephidae, Octopoteuthidae, Enoploteuthidae, and Neoteuthidae. Mesoplodon may also feed on deep-sea and mesopelagic fish (Lampanyctus, Scopelogadus, Cepola), but they are likely to be only opportunistic prey; squid make up the great majority of the diet.
Animal Foods: fish; mollusks
Primary Diet: carnivore (Molluscivore )
There are no known adverse affects of M. grayi on humans.
The evolutionary development of dentition in mesoplodont whales and their nearly exclusive diet of squid, indicate that there must be a strong ecological relationship between these organisms. The highly specialized tongue and reduced teeth allow the whales to use suction to capture their prey. The stomach remains of mesoplodont whales almost always contains squid species smaller than 500 g, which contrasts sharply with other beaked whales (genera Hyperoodon and Ziphius) whose diet consists mainly of squid averaging 1000 g in weight (CMS, 2003). This information indicates that Mesoplodon occupies a dietary niche separate from other beaked whales. The preference for and effectiveness at capturing squid suggests that mesoplodont whales strongly impact the squid population.
Species Used as Host:
Mutualist Species:
Commensal/Parasitic Species:
The instances of humans encountering M. grayi are so rare that it probably has little direct economic importance. Further information is unavailable.
Unfortunately, there is little information on the mating system of M. grayi. However, it is very likely that M. grayi follows similar patterns to other toothed whales (Odontoceti). M. grayi, like other toothed whales, does not show as distinct a seasonality in mating and birth as do the baleen whales; this is primarily due to the relatively warmer waters the toothed whales inhabit. Toothed whales live in small groups with very large ranges of thousands of square miles. It may be difficult for individuals to meet others of the opposite sex, so when they do, it is essential that the right signals are conveyed. Toothed whales are very social, and when pods meet there are physical changes in the female’s body to indicate to potential mates that she is ready. Though these exact signals are unknown, it is likely that a combination of both behavioral dance-like movements and hormones discharged through feces or urine serve as cues.
The courtship and mating rituals usually involve belly contact between the male and female. The pair may be interlocked vertically, or the male may swim upside-down underneath the female. There is also much play in the form of chases, breaching of the surface, and flipper contact. All these behavioral cues convey the readiness to mate.
Detailed information on the reproductive behavior of M. grayi is unavailable. The mother most likely give birth to a single calf. Gray’s beaked whales, like many whales, are most often seen in pods and highly social behavior has been observed. Often in these groups, females that don't have offspring of their own assist other females in the pod raise their calves. A calf likely remains by its mother’s side until it reaches maturity.
Although toothed whales occupying warm oceanic waters can breed throught the year, most breeding in the southern hemisphere is probably between October and December, and the young are born between February and March. Breeding grounds for similar species are often in shallower waters that are sheltered by bays or inlets. Seasonal movements from winter mating grounds to summer feeding grounds are common for other species but not confirmed for M. grayi.
Breeding interval: Unknown; Probably one calf per year.
Breeding season: Unknown; Probably between October and December
Average number of offspring: 1.
Key Reproductive Features: iteroparous ; seasonal breeding ; gonochoric/gonochoristic/dioecious (sexes separate); sexual ; viviparous
All cetacean species follow a similar pattern for parental investment. The mother nurses the young; she and the pod family teach newborn calves how to socialize, how to avoid preadators, and how to hunt. Specific information on M. grayi is unavailable.
Parental Investment: no parental involvement; precocial ; female parental care ; pre-fertilization (Protecting: Female); pre-hatching/birth (Provisioning: Female, Protecting: Female); pre-weaning/fledging (Provisioning: Female, Protecting: Female); pre-independence (Protecting: Female); extended period of juvenile learning
Mezoplodon Gray (Mesoplodon grayi) a zo ur morvil dantek.
El zífid de Gray (Mesoplodon grayi) és un dels membres més ben coneguts del gènere de cetacis Mesoplodon. El nom científic fa referència a John Edward Gray, un zoòleg del British Museum. És una espècie bastant gregària que queda avarada bastant sovint per un zífid. És notable perquè és l'únic zífid, a part del zífid becut de Shepherd (que no és del gènere Mesoplodon), que té moltes dents.
Grays næbhval (Mesoplodon grayi) er en art i familien af næbhvaler i underordenen af tandhvaler. Dyret bliver 4,5-5,6 m langt og vejer 1-1,5 t.
Der Camperdown-Wal (Mesoplodon grayi), auch als Gray-Zweizahnwal bezeichnet, ist eine Walart aus der Familie der Schnabelwale (Ziphiidae). Durch seine lange Schnauze und die Zähne im Oberkiefer unterscheidet er sich von den anderen Vertretern der Gattung der Zweizahnwale (Mesoplodon).
Diese Walart lebt zirkumpolar in den Gewässern der südlichen Hemisphäre. Strandungen sind aus Neuseeland, Australien, Südafrika, Chile und Argentinien belegt, Sichtungen lebender Tiere werden vor allem vom südlichen Indischen Ozean berichtet. Eine Strandung in den Niederlanden kann darauf hindeuten, dass diese Wale gelegentlich nordwärts wandern.
Camperdown-Wale haben eine langgestreckte, weiße Schnauze, die neben den zwei dreieckigen, großen Zähnen des Unterkiefers 34 bis 44 kleine Zähne im Oberkiefer beinhaltet. Ihr Körper ist dunkelgrau gefärbt, am Bauch finden sich helle, unregelmäßige Flecken. Im Alter werden die Kiefer weiß. Weibchen werden etwas größer als Männchen, sie erreichen bis zu 5,6 Meter, während Männchen höchstens 4,7 Meter lang werden.
Im Gegensatz zu anderen Zweizahnwalen leben Camperdown-Wale in größeren Schulen zusammen. Aus dem 19. Jahrhundert ist eine Massenstrandung von 28 Tieren bekannt, was Rückschlüsse auf die Gruppengröße ermöglicht. Wie die meisten Schnabelwale ernähren sie sich vorwiegend von Tintenfischen und gelten als gute, ausdauernde Taucher.
Häufige Sichtungen und Strandungen deuten darauf hin, dass der Camperdown-Wal zu den häufigeren Schnabelwalen gehört, genaue Daten sind jedoch nicht verfügbar.
Der Camperdown-Wal (Mesoplodon grayi), auch als Gray-Zweizahnwal bezeichnet, ist eine Walart aus der Familie der Schnabelwale (Ziphiidae). Durch seine lange Schnauze und die Zähne im Oberkiefer unterscheidet er sich von den anderen Vertretern der Gattung der Zweizahnwale (Mesoplodon).
Gray's beaked whale (Mesoplodon grayi), sometimes known as Haast's beaked whale, the scamperdown whale, or the southern beaked whale, is one of the better-known members of the genus Mesoplodon. This species is fairly gregarious and strands relatively frequently for a beaked whale. In the Māori language, this species is called hakurā or iheihe.[3]
The species was first described in 1876 by Julius von Haast, director of the Canterbury Museum, Christchurch, New Zealand. He named it after the British taxonomist John Edward Gray, a zoologist at the British Museum. His description was based on three skulls he had received in May 1875 from a Louis Walter Hood Esq. (1837 – 11 February 1912, generally known as Walter) the storekeeper at Waitangi, Chatham Island, who had retrieved them from three specimens that were part of a group of 28 individuals that had stranded on Waitangi Beach in the summer of 1874–75.[4]
Gray's beaked whale is a fairly slender member of the genus. The melon on the whale bulges towards the blowhole and slopes down towards the beak. The beak itself is very long and pointed for a beaked whale, and has a relatively straight mouth line. In both sexes, 17–22 small teeth per row located towards the back of the mouth have been reported, but not confirmed. In males, two small, triangular teeth are present halfway down the mouth. The overall coloration is dark on top and light below, and both sexes have a white beak. Females are lighter on top and have additional white markings near the genitals. Adult males often carry linear scars that probably result from fighting, and both males and females may display circular scars from cookiecutter shark bites.[5] M. grayi are 5.5 to 6.0 m (18.0 to 19.7 ft) long and weigh around 1,100 kg (2,400 lb).[6] They are believed to be around 2.4 m (7 ft 10 in) long when born.
Gray's beaked whale is very gregarious. It has a tendency to strand in large groups, once involving 28 individuals. Other strandings involved five to eight animals. The upper teeth may be used in holding prey, but why only this species has them is not clear.
Gray's beaked whale is said to be the most common species of whale to beach in New Zealand.[7] Two whales that stranded themselves on Opape Beach in the Bay of Plenty, New Zealand, in December 2010, were initially thought to be Gray's beaked whales, but later found to be the very rare spade-toothed whale.[7]
This species typically lives in the Southern Hemisphere between 30 and 45°, and is typically observed at depths of 2,000 m (6,600 ft).[6] Many strandings have occurred off New Zealand, but others have happened off Australia, South Africa, South America, and the Falkland Islands. This species has been sighted in groups off the coast of Madagascar and in the Antarctic area. Oddly, one specimen stranded off the Netherlands, in a different hemisphere and several thousand miles away from all other strandings. No population estimates exist, but they are believed to be rather common.
These whales have not been hunted deliberately and they have not been entangled in fishing gear. Gray's beaked whale is included in the Memorandum of Understanding Concerning the Conservation of the Manatee and Small Cetaceans of Western Africa and Macaronesia (Western African Aquatic Mammals MoU) and the Memorandum of Understanding for the Conservation of Cetaceans and Their Habitats in the Pacific Islands Region (Pacific Cetaceans MoU)
Gray's beaked whale (Mesoplodon grayi), sometimes known as Haast's beaked whale, the scamperdown whale, or the southern beaked whale, is one of the better-known members of the genus Mesoplodon. This species is fairly gregarious and strands relatively frequently for a beaked whale. In the Māori language, this species is called hakurā or iheihe.
Greja bekobaleno, Greja mezoplodo, Greja dentobaleno, mezoplodo malgranda, aŭ malgranda mezoplodo (Mesoplodon grayi), foje konata kiel bekobaleno de Haast, bekobaleno de Scamperdown aŭ suda bekobaleno, estas unu el plej bone konataj membroj de la genro Mesoplodon. Tiu specio estas tre gregema kaj surstrandiĝas relative ofte por bekobaleno. En Maoria lingvo, tiu specio estas nomita hakurā aŭ iheihe.[1]
La specio estis unuafoje priskribita en 1876 fare de Julius von Haast, direktoro de la Kanterburia Muzeo, Christchurch, Novzelando. Li nomigis ĝin laŭ la Brita taksonomiisto John Edward Gray, zoologo de la Brita Muzeo. Lia priskribo estis bazita sur tri kranioj kiujn li estis ricevintaj en Majo 1875 el William Hood, Esq., kiujn li estis rikoltinta el tri specimenoj kiuj estis parto de grupo de 28 individuoj surstrandiĝintaj en Waitangi Beach, insulo Chatham, somere de 1874-75.[2]
Greja bekobaleno, Greja mezoplodo, Greja dentobaleno, mezoplodo malgranda, aŭ malgranda mezoplodo (Mesoplodon grayi), foje konata kiel bekobaleno de Haast, bekobaleno de Scamperdown aŭ suda bekobaleno, estas unu el plej bone konataj membroj de la genro Mesoplodon. Tiu specio estas tre gregema kaj surstrandiĝas relative ofte por bekobaleno. En Maoria lingvo, tiu specio estas nomita hakurā aŭ iheihe.
El zifio de Gray o delfín picudo de Gray (Mesoplodon grayi) es una especie de cetáceo odontoceto de la familia Ziphidae.[2] Es uno de los miembros más conocidos del género Mesoplodon. El nombre científico es en referencia a John Edward Gray, zoólogo británico. Esta especie es bastante gregaria, se caracteriza por ser la única zifio presenta una numerosa dentadura. No se reconocen subespecies.[2]
De color gris oscuro dorsal y coloración gris claro a blanco en el vientre, la mandíbula inferior y la zona de la garganta posee un cuerpo delgado y cabeza pequeña con frente plana. Su hocico es largo y fino, presentando dos surcos ventrales (en forma de V) en el área de la garganta. La aleta dorsal falcada, se ubica en el tercio posterior del dorso. Alcanza una longitud de entre 5,5 y 6 my un peso de cerca 4.800 kg.[3]
Esta especie es propia del hemisferio sur entre los 30 y los 45 grados. Se han registrado varamientos en Nueva Zelanda, Australia, Sudáfrica, América del Sur y las Islas Malvinas.
En el Atlántico norte es considerada como divagante, con avistamientos en la costa de Andalucía (España)[4] y un varamiento registrado en la costa holandesa, el único en Europa.[3]
No existen estimaciones de población, pero se cree que son bastante comunes.
El zifio de Gray o delfín picudo de Gray (Mesoplodon grayi) es una especie de cetáceo odontoceto de la familia Ziphidae. Es uno de los miembros más conocidos del género Mesoplodon. El nombre científico es en referencia a John Edward Gray, zoólogo británico. Esta especie es bastante gregaria, se caracteriza por ser la única zifio presenta una numerosa dentadura. No se reconocen subespecies.
Mesoplodon grayi Mesoplodon generoko animalia da. Artiodaktiloen barruko Ziphiidae familian sailkatuta dago.
Mesoplodon grayi Mesoplodon generoko animalia da. Artiodaktiloen barruko Ziphiidae familian sailkatuta dago.
Mesoplodon grayi
La baleine à bec de Gray (Mesoplodon grayi) est une espèce de cétacés de la famille des Ziphiidae.
Mesoplodon grayi
La baleine à bec de Gray (Mesoplodon grayi) est une espèce de cétacés de la famille des Ziphiidae.
Il mesoplodonte di Gray (Mesoplodon grayi, von Haast, 1876) è un cetaceo odontoceto della famiglia Ziphiidae. È uno dei membri meglio conosciuti del genere Mesoplodon. Il nome scientifico si riferisce a John Edward Gray, uno zoologo del British Museum. Questa specie è parecchio gregaria e si spiaggia abbastanza facilmente. Oltre al tasmaceto, è l'unico zifide che possiede denti numerosi. Nella lingua māori, questa specie è chiamata hakurā o iheihe[1].
Il mesoplodonte di Gray è chiaramente il membro più snello del genere. Il melone di questo cetaceo si protende verso lo sfiatatoio e si inclina verso il becco. Il becco stesso è molto lungo e appuntito per una balena dal becco, e presenta una rima boccale piuttosto diritta. In entrambi i sessi sono presenti 17-22 fila di piccoli denti, situati verso il retro della bocca, che emergono appena dalla gengiva. Nei maschi, sono presenti due piccoli denti triangolari situati a metà della bocca. La colorazione del dorso è nera, ma sul ventre si fa più chiara, ed entrambi i sessi hanno un becco bianco. Le femmine hanno il dorso più chiaro e presentano inoltre delle chiazze bianche vicino ai genitali. I maschi adulti hanno le cicatrici provocate dai combattimenti e dagli squali cookie-cutter, tipiche del genere[2]. Le femmine raggiungono al massimo i 5,3 metri, mentre i maschi misurano 5,7 metri e pesano intorno ai 1100 chilogrammi[3]. Si pensa che alla nascita siano lunghe 2,4 metri.
Questa specie ha la tendenza a spiaggiarsi in gruppi numerosi, uno dei quali raggiunse una volta i 20 individui. Gli altri spiaggiamenti coinvolgono gruppi di 5 o 6 animali, e a volte anche 8. I denti superiori possono essere usati per trattenere la preda, ma non è chiaro perché li possegga solo questa specie.
Questa specie vive generalmente nell'emisfero meridionale tra i 30 e i 45 gradi. Molti spiaggiamenti sono avvenuti sulle coste della Nuova Zelanda, ma altri anche in Australia, Sudafrica, Sudamerica e sulle isole Falkland. Questa specie è stata avvistata in gruppo al largo del Madagascar e dell'area antartica. Fatto stranissimo, un esemplare si è spiaggiato nei Paesi Bassi, in un diverso emisfero e a distanza di alcune migliaia di miglia dai luoghi degli altri spiaggiamenti. Non esiste alcuna stima della popolazione, ma si crede che sia piuttosto comune.
Questi odontoceti non vengono cacciati deliberatamente e non sono rimasti intrappolati nelle reti da pesca.
Il mesoplodonte di Gray (Mesoplodon grayi, von Haast, 1876) è un cetaceo odontoceto della famiglia Ziphiidae. È uno dei membri meglio conosciuti del genere Mesoplodon. Il nome scientifico si riferisce a John Edward Gray, uno zoologo del British Museum. Questa specie è parecchio gregaria e si spiaggia abbastanza facilmente. Oltre al tasmaceto, è l'unico zifide che possiede denti numerosi. Nella lingua māori, questa specie è chiamata hakurā o iheihe.
De spitssnuitdolfijn van Gray (Mesoplodon grayi) is een walvisachtige uit de familie der spitssnuitdolfijnen (Ziphiidae). De spitssnuitdolfijn van Gray komt waarschijnlijk enkel voor op het Zuidelijk Halfrond. Het is een vrij sociale soort, die voor een spitssnuitdolfijn uit het geslacht Mesoplodon, regelmatig strandt. De soort is vernoemd naar de Britse zoöloog John Edward Gray.
De spitssnuitdolfijn van Gray is een grote tandwalvis. De kop is klein en bijna plat, zonder duidelijke meloen maar met een lange, smalle bek. De kleur is meestal bruinachtig of blauwig donkergrijs tot zwart op de rug, met vaak gevlekt grijs op de flanken en een lichtgrijze tot witte buik. De bek kan wit of witgevlekt zijn, en wordt witter naarmate het dier ouder wordt. Rond de navel, de anus en de genitaliën bevinden zich witte markeringen.
Het mannetje heeft één paar driehoekige tanden in de onderkaak, die middelgroot zijn (ongeveer 10 cm hoog en 8cm breed), een gezaagde rand hebben met één of meer scherpe punten en iets naar voren gebogen staan. Deze tanden bevinden zich zo'n 20 cm van de punt van de kaak af. Ook hebben zowel het mannetje als het vrouwtje ongeveer 17 tot 22 (maximaal 26) zeer kleine, rudimentaire tandjes in de bovenkaak, die net buiten het tandvlees steken.
Vrouwtjes worden groter dan mannetjes. Vrouwtjes worden 5,64 tot 6 meter lang en 4,8 ton zwaar, mannetjes gemiddeld 4,64 meter lang en gemiddeld 1 ton zwaar.
De spitssnuitdolfijn komt voor in alle gematigde en koude zeeën ten zuiden van de Steenbokskeerkring. De enige bekende stranding van de soort op het Noordelijk Halfrond was op de Nederlandse kust. Hij leeft waarschijnlijk in groepjes van zes of meer dieren, afgaande op enkele massale strandingen en zeldzame waarnemingen op volle zee. Net als de meeste andere spitssnuitdolfijnen jaagt hij voornamelijk op inktvissen.
De spitssnuitdolfijn van Gray (Mesoplodon grayi) is een walvisachtige uit de familie der spitssnuitdolfijnen (Ziphiidae). De spitssnuitdolfijn van Gray komt waarschijnlijk enkel voor op het Zuidelijk Halfrond. Het is een vrij sociale soort, die voor een spitssnuitdolfijn uit het geslacht Mesoplodon, regelmatig strandt. De soort is vernoemd naar de Britse zoöloog John Edward Gray.
De spitssnuitdolfijn van Gray is een grote tandwalvis. De kop is klein en bijna plat, zonder duidelijke meloen maar met een lange, smalle bek. De kleur is meestal bruinachtig of blauwig donkergrijs tot zwart op de rug, met vaak gevlekt grijs op de flanken en een lichtgrijze tot witte buik. De bek kan wit of witgevlekt zijn, en wordt witter naarmate het dier ouder wordt. Rond de navel, de anus en de genitaliën bevinden zich witte markeringen.
Het mannetje heeft één paar driehoekige tanden in de onderkaak, die middelgroot zijn (ongeveer 10 cm hoog en 8cm breed), een gezaagde rand hebben met één of meer scherpe punten en iets naar voren gebogen staan. Deze tanden bevinden zich zo'n 20 cm van de punt van de kaak af. Ook hebben zowel het mannetje als het vrouwtje ongeveer 17 tot 22 (maximaal 26) zeer kleine, rudimentaire tandjes in de bovenkaak, die net buiten het tandvlees steken.
Vrouwtjes worden groter dan mannetjes. Vrouwtjes worden 5,64 tot 6 meter lang en 4,8 ton zwaar, mannetjes gemiddeld 4,64 meter lang en gemiddeld 1 ton zwaar.
De spitssnuitdolfijn komt voor in alle gematigde en koude zeeën ten zuiden van de Steenbokskeerkring. De enige bekende stranding van de soort op het Noordelijk Halfrond was op de Nederlandse kust. Hij leeft waarschijnlijk in groepjes van zes of meer dieren, afgaande op enkele massale strandingen en zeldzame waarnemingen op volle zee. Net als de meeste andere spitssnuitdolfijnen jaagt hij voornamelijk op inktvissen.
A baleia-bicuda-de-gray (Mesoplodon grayi) é um cetáceo da família dos zifiídeos (Ziphiidae) encontrado nas águas temperadas frias do hemisfério sul.
A baleia-bicuda-de-gray (Mesoplodon grayi) é um cetáceo da família dos zifiídeos (Ziphiidae) encontrado nas águas temperadas frias do hemisfério sul.
Grays näbbval (Mesoplodon grayi) är en art i familjen näbbvalar (Ziphiidae) som förekommer i alla hav söder om ekvatorn. Djuret är uppkallat efter den brittiska zoologen John Edward Gray.
Arten lever i alla hav kring Antarktis och norrut ungefär till 30° sydlig bredd. Strandade individer hittades främst i Nya Zeeland, Australien, Sydafrika, Chile, Argentina och Peru. Iakttagelser i det öppna havet registrerades huvudsakligen i Indiska oceanen. En strandning i Nederländerna tyder på att vissa individer utför längre vandringar. Grays näbbval vistas främst i det öppna havet längre bort från kustlinjerna.[1] Havsdjupet i dessa områden är 200 meter eller djupare.[2]
Liksom andra näbbvalar har grays näbbval en långsträckt nos. Vad som skiljer arten från andra medlemmar i samma familj är antalet tänder. Grays näbbval har förutom två tänder i underkäken 34 till 44 små tänder i överkäken. Kroppens färg är mörkgrå och på buken finns några ljusa fläckar, nosen är hos äldre individer vitaktig. Honor blir med en längd upp till 5,6 meter något större än hannar som når 4,7 meters längd. Vikten uppgår till 1 500 kilogram.[3] På strupen förekommer två rännor.[2]
Oftast iakttas ensamma individer eller par. Grays näbbval bildar ibland större flockar än andra näbbvalar. Under 1800-talet registrerades strandningar av upp till 28 individer samtidig. Arten livnär sig främst av bläckfiskar och har bra förmåga att dyka. Även några fiskar ingår i födan.[3] Efter dräktigheten som uppskattas vara ett år lång föds en unge. Antagligen är den ett år beroende av moderns vård.[2]
Många iakttagelser och strandningar tyder på att grays näbbval har ett större bestånd men noggranna data saknas. IUCN listar arten med kunskapsbrist (data deficient).[1]
Wikimedia Commons har media som rör Grays näbbval.
Grays näbbval (Mesoplodon grayi) är en art i familjen näbbvalar (Ziphiidae) som förekommer i alla hav söder om ekvatorn. Djuret är uppkallat efter den brittiska zoologen John Edward Gray.
Gray gagalı balinası veya Gray iki dişli balinası (Mesoplodon grayi), gagalı balinagiller (Ziphiidae) familyasından iki dişli balina (Mesoplodon) cinsine ait bir balina türü. Bu cinse ait diğer türlerden üst çenesinde de dişleri olması ve daha uzun burunu ile farklıdır.
Gray gagalı balinası güney yarıkürenin denizlerinde yaşar. Karaya vuran leşleri Yeni Zelanda, Avustralya, Güney Afrika, Şili ve Arjantin'de bulunmuştur. Hint Okyanusu'nun güneyinde canlı bireyler gözlenebilir. Bir kez Hollanda'nın kıyısına vuran bir bireyden dolayı ara sıra kuzeye de göç ettikleri tahmin edilir.
Uzun bir, beyaz renkte burunları, iki adet üçgen şeklinde azman dişi ve çene üstünde 34 - 44 dişi olur. Vücutları koyu gri renk, alt kısmı daha açık renk olur. Dişilerin boyu 5,6 metreye, erkeklerin ise 4,7 metreye varır.
Diğer iki dişli balinalardan farklı olarak gray gagalı balinası büyük gruplar içinde yaşar. 19'uncu yüzyılda 28 bireyden oluşan bir grup karaya vurmuştur. Diğer gagalı balinagiller gibi onlar da çok derinliklerde avladıkları kafadan bacaklılar ile beslenir.
Diğer gagalı balinalardan daha sık görüldüğü ve daha sık karaya vurduğu için sayıları diğerlerinden daha sağlam olduğu tahmin edilir.
Gray gagalı balinası veya Gray iki dişli balinası (Mesoplodon grayi), gagalı balinagiller (Ziphiidae) familyasından iki dişli balina (Mesoplodon) cinsine ait bir balina türü. Bu cinse ait diğer türlerden üst çenesinde de dişleri olması ve daha uzun burunu ile farklıdır.
Ременезуб Грея (Mesoplodon grayi) — кит з роду Ременезуб, родини Дзьоборилові. Має маленькі трикутні зубами розташовані далеко від переднього кінця нижньої щелепи. Цих китів знаходять у водах Нової Зеландії, Південної Австралії, Південної Африки, Патагонії, Фолклендських островів. Схоже це не тільки широко розповсюджений, але й стадний вид.
Ременезуб Грея (Mesoplodon grayi) — кит з роду Ременезуб, родини Дзьоборилові. Має маленькі трикутні зубами розташовані далеко від переднього кінця нижньої щелепи. Цих китів знаходять у водах Нової Зеландії, Південної Австралії, Південної Африки, Патагонії, Фолклендських островів. Схоже це не тільки широко розповсюджений, але й стадний вид.
Cá voi mõm khoằm Gray (danh pháp khoa học: Mesoplodon grayi) là một loài cá voi có răng. Chúng là loài được người ta biết đến nhiều hơn của chi Mesoplodon. Danh pháp khoa học đặt theo John Edward Gray, một nhà động vật học tại Bảo tàng Anh. Loài này thường sống ở Nam bán cầu giữa 30 và 45 độ. Nhiều loài đi lang thang đến ngoài khơi New Zealand, và một số con khác hiện diện ngoài khơi Australia, Nam Phi, Nam Mỹ, và quần đảo Falkland. Loài này đã được nhìn thấy trong các nhóm ngoài khơi bờ biển Madagascar và trong khu vực Nam Cực. Nhưng kỳ lạ, đã một mẫu vật bị mắc kẹt ngoài khơi Hà Lan, trong một bán cầu khác và cách xa hàng ngàn dặm từ tất cả các khu vực mắc cạn khác. Người ta chưa ước tính tổng số lượng còn tồn tại, nhưng chúng được cho là khá phổ biến.
Phương tiện liên quan tới Mesoplodon grayi tại Wikimedia Commons
Cá voi mõm khoằm Gray (danh pháp khoa học: Mesoplodon grayi) là một loài cá voi có răng. Chúng là loài được người ta biết đến nhiều hơn của chi Mesoplodon. Danh pháp khoa học đặt theo John Edward Gray, một nhà động vật học tại Bảo tàng Anh. Loài này thường sống ở Nam bán cầu giữa 30 và 45 độ. Nhiều loài đi lang thang đến ngoài khơi New Zealand, và một số con khác hiện diện ngoài khơi Australia, Nam Phi, Nam Mỹ, và quần đảo Falkland. Loài này đã được nhìn thấy trong các nhóm ngoài khơi bờ biển Madagascar và trong khu vực Nam Cực. Nhưng kỳ lạ, đã một mẫu vật bị mắc kẹt ngoài khơi Hà Lan, trong một bán cầu khác và cách xa hàng ngàn dặm từ tất cả các khu vực mắc cạn khác. Người ta chưa ước tính tổng số lượng còn tồn tại, nhưng chúng được cho là khá phổ biến.
Mesoplodon grayi (Von Haast, 1876)
Ареал
Ремнезуб Грея (лат. Mesoplodon grayi) — морское млекопитающее из рода ремнезубы (Mesoplodon). Назван в честь британского зоолога Джона Эдуарда Грея.
Длина до 6 м. Зубы маленькие, треугольные, растут далеко от переднего конца нижней челюсти.
Встречаются в водах Новой Зеландии, юга Австралии, Южной Африки, Патагонии, Фолклендских островов, архипелага Чатем. Отдельные экземпляры попадались вблизи Голландии и Калифорнии.
Для ремнезуба Грея предполагается стадный образ жизни.
Ремнезуб Грея (лат. Mesoplodon grayi) — морское млекопитающее из рода ремнезубы (Mesoplodon). Назван в честь британского зоолога Джона Эдуарда Грея.
格氏中喙鯨或哥氏中喙鯨（學名Mesoplodon grayi）旧称格氏喙鲸，又称哥瑞氏中喙鯨、下跃喙鲸、南方喙鲸。其可能是最具群居性的中喙鯨，其擱淺發生頻率相當高，有時會有群體擱淺的情形，而牠們也是中喙鯨屬中人類研究最深入的一種。其通用俗名源自大英博物館的著名動物學學者，約翰·艾德華·蓋利（John Edward Gray）的姓氏。哥氏中喙鯨主要在南極洋出現。
其他俗名：
出生時身長體重：約2.1-2.2m，體重未知
最大身長體重記錄：雄-5.7m、雌-5.3m以上；體重約1,100kg
壽命：未知
哥氏中喙鯨的體型中等而修長，背鰭小，約略呈鐮刀形。牠們有顯著的長而尖銳的嘴喙，嘴部曲線相當筆直。額隆在噴氣孔前方略微凸起，至嘴喙的傾斜度較平滑。哥氏中喙鯨在中喙鯨屬中相當特別，成鯨無論雌雄在上顎皆有17-22對小牙齒，大致由下顎大牙齒的相對位置開始往後方排列，這些牙齒的長度通常僅數公釐，且根部未連接下顎骨。根據此項特點，曾有科學家建議將牠們獨立為1新屬Oulodon。成年雄鯨下顎有2顆中小型的牙齒，外露的部分呈三角形，其位置約在尖端後方20-24公分處，略微往前傾斜。
整體而言，其背部呈暗灰色而腹面為淺灰色，胸鰭的顏色很深。成年雄鯨渾身皆為深灰色，但下顎是顯眼的白色；成年雌鯨背部顏色較成年雄鯨略淺，下顎為淺灰色至白色。在肚臍、生殖裂、肛門、乳裂周圍有白色斑塊。成年雄鯨身上有許多白色長條傷痕與白色小而圓的斑點。
哥氏中喙鯨廣泛分布於南半球溫帶水域，主要在南緯30度至45度之間。擱淺曾在智利、阿根廷、福克蘭群島、南非、澳洲、紐西蘭與跕松群島（Chatham Islands）等地發現，尤以紐西蘭為甚。在馬達加斯加南部、東部外海，以及南極洲附近海域皆有已證實的目擊記錄。在荷蘭曾有1次擱淺記錄，但一般認為是迷途而非其正常分布範圍。
哥氏中喙鯨有時會大量地集體擱淺。1874年，在跕松群島發現28頭個體集體擱淺，由此記錄顯示牠們可能有比一般中喙鯨大得多的族群。在跕松群島另外曾有過8頭集體擱淺的記錄，而5至6頭的群體擱淺也曾在馬達加斯加的東南部海岸發現。關於哥氏中喙鯨上顎小牙齒的功能不明，部分學者推測可能有輔助抓取獵物的功能，不過一般認為牠們專吃魷魚，可能以吮吸的方式來捕捉獵物。其生殖狀況所知極少。
由高擱淺頻率與集體擱淺的群體大小推斷，哥氏中喙鯨的數量可能相當地多。沒有證據顯示牠們曾遭蓄意獵捕或經常因漁網纏繞而死。
1. Pieter A. Folken, Randall R. Reeves, etc. / illustrated by Pieter A. Folkens, 《Guide to MARINE MAMMALS of the World》,Alfred A. Knopf, 2002: p282-283. ISBN 0-375-41141-0
2. Mark Carwardine / illustrated by Martin CammDorling, 《DORLING KINDERSLEY HANDBOOKS: WHALES, DOLPHINS AND PORPOISES》, Dorling Kindersley, 1995: p126-127. ISBN 0-7513-2781-6
3. James G. Mead, 《Beaked Whales of the Genus Mesoplodon》, edited by Sam H. Ridgway and Sir Richard Harrison, F.R.S. 《Handbook of Marine Mammals, Volume 4: River Dolphins and the Larger Toothed Whales》, Academic Press, 1989: p349-430. ISBN 0-12-588504-0
格氏中喙鯨或哥氏中喙鯨（學名Mesoplodon grayi）旧称格氏喙鲸，又称哥瑞氏中喙鯨、下跃喙鲸、南方喙鲸。其可能是最具群居性的中喙鯨，其擱淺發生頻率相當高，有時會有群體擱淺的情形，而牠們也是中喙鯨屬中人類研究最深入的一種。其通用俗名源自大英博物館的著名動物學學者，約翰·艾德華·蓋利（John Edward Gray）的姓氏。哥氏中喙鯨主要在南極洋出現。
分類 界 : 動物界 Animalia 門 : 脊索動物門 Chordata 亜門 : 脊椎動物亜門 Vertebrata 綱 : 哺乳綱 Mammalia 目 : 鯨偶蹄目 Cetartiodactyla 亜目 : ハクジラ亜目 Odontoceti 科 : アカボウクジラ科 Ziphiidae 亜科 : トックリクジラ亜科 Hyperoodontinae 属 : オウギハクジラ属 Mesoplodon 種 : ミナミオウギハクジラ M. grayi 学名 Mesoplodon grayi
ミナミオウギハクジラ（南扇歯鯨、Mesoplodon grayi）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小型のクジラである。オウギハクジラ類としては比較的良く知られている種である。群を成して行動することが多く、集団座礁（マスストランディング）の報告例もアカボウクジラ類としては比較的多い。他の多くのアカボウクジラ類とは異なり、ミナミオウギハクジラはオウギハクジラ類としては唯一、アカボウクジラ類としてはタスマニアクジラ属のタスマニアクジラを除けば唯一、多数の歯を有している。
種小名の grayi および英名の Gray's はイギリスの動物学者であるジョン・エドワード・グレイに由来する。和名のミナミ（南）は南半球に棲息することに由来する。他の英名としては Haast's Beaked Whale、Scamperdown Whale などが知られる。
ミナミオウギハクジラはオウギハクジラ類としては非常に細身の体型である。頭部メロンは僅かに膨らんでいる程度であまり目立たない。口吻は非常に長く、唇の線は直線的である。雌雄とも上顎に歯茎から僅かに出ている17から22対の歯を有する。雄の下顎の中ほどには三角形の小さな歯がある。
全体的な体色は灰色であり、背側は濃い灰色、腹側は明るい灰色である。雌雄とも口吻は白い。雌の背は雄よりも明るい灰色であり、生殖器の周囲に白い模様がある。雌雄ともダルマザメによる噛み傷があり、雄の場合には別の雄と争ってできた傷跡があることも多い。
成体の体長は雄が5.7m、雌が少なくとも5.3mであり、体重は1,100kg程度である。産まれた直後の体長は2.4mほどであると考えられる。
南半球の南緯30度から45度の海域に生息する。集団座礁（マスストランディング）の多くはニュージーランドにおいて報告されているが、オーストラリア、南アフリカ、南アメリカ、フォークランド諸島などにおける報告例もある。マダガスカルの沖や南極海における群の目撃例も報告されている。変わった例として、遠く離れた北半球のオランダにおける座礁例が知られている。
全生息数は不明であるが、それほど少数ではないだろうと考えられている。国際自然保護連合 (IUCN) のレッドリストでは「データ不足」 (DD - Data Deficient) に分類されている。
集団座礁（マスストランディング）することが珍しくない。多くは5頭から8頭程度の集団座礁であるが、一度に20頭が座礁した例も知られている。
上述の通りアカボウクジラ類としては珍しく多数の歯を有する。上顎に生えている歯は獲物を捕食する際に使用されるかもしれないが、小さな歯であるため実際に役に立っているかどうかは不明である。
捕鯨の対象とされたことはなく、漁網などによる混獲の被害の報告も知られていない。
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）。 ミナミオウギハクジラ（南扇歯鯨、Mesoplodon grayi）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小型のクジラである。オウギハクジラ類としては比較的良く知られている種である。群を成して行動することが多く、集団座礁（マスストランディング）の報告例もアカボウクジラ類としては比較的多い。他の多くのアカボウクジラ類とは異なり、ミナミオウギハクジラはオウギハクジラ類としては唯一、アカボウクジラ類としてはタスマニアクジラ属のタスマニアクジラを除けば唯一、多数の歯を有している。
種小名の grayi および英名の Gray's はイギリスの動物学者であるジョン・エドワード・グレイに由来する。和名のミナミ（南）は南半球に棲息することに由来する。他の英名としては Haast's Beaked Whale、Scamperdown Whale などが知られる。
그레이부리고래(Mesoplodon grayi)는 부리고래과 이빨부리고래속에 속하는 고래의 일종이다.[2] 이빨부리고래속 고래 중에서 잘 알려진 고래로 하스트부리고래(Haast's beaked whale) 또는 캠포다운고래(Scamperdown whale), 남방부리고래(southern beaked whale) 등으로도 불린다. 학명은 대영 박물관의 동물학자 존 에드워드 그레이의 이름을 따서 지었다.
그레이부리고래(Mesoplodon grayi)는 부리고래과 이빨부리고래속에 속하는 고래의 일종이다. 이빨부리고래속 고래 중에서 잘 알려진 고래로 하스트부리고래(Haast's beaked whale) 또는 캠포다운고래(Scamperdown whale), 남방부리고래(southern beaked whale) 등으로도 불린다. 학명은 대영 박물관의 동물학자 존 에드워드 그레이의 이름을 따서 지었다.
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