Die streepstert-nooientjie (Abudefduf sexfasciatus) is 'n vis wat voorkom in die Stille Oseaan, die Indiese Oseaan; meer spesifiek die Rooisee en aan die kus van Oos-Afrika suidwaarts tot by die noorde van KwaZulu-Natal. In Engels staan die vis bekend as die Stripetail damsel.
Die vis word tot 19cm lank en sy lyf is blougroen aan die bokant en wit aan die sye en op die pens. Daar is 5 swart vertikale sterpe oor die sye. Die gevurkte stertvin se rante is swart. Die vis leef in rots kusareas en koraalriwwe in water wat 1 tot 15m diep is. Hier kom hulle gewoonlik in groepe voor bokant die rif. Hulle vreet soöplankton, klein skaaldiere en alge.
Die streepstert-nooientjie (Abudefduf sexfasciatus) is 'n vis wat voorkom in die Stille Oseaan, die Indiese Oseaan; meer spesifiek die Rooisee en aan die kus van Oos-Afrika suidwaarts tot by die noorde van KwaZulu-Natal. In Engels staan die vis bekend as die Stripetail damsel.
Abudefduf sexfasciatus és una espècie de peix de la família dels pomacèntrids i de l'ordre dels perciformes.
Els mascles poden assolir els 16 cm de longitud total.[2]
Es troba des del Mar Roig fins a Pinda (Moçambic), les Tuamotu i el sud del Japó.[2]
Abudefduf sexfasciatus és una espècie de peix de la família dels pomacèntrids i de l'ordre dels perciformes.
The scissortail sergeant or striptailed damselfish (Abudefduf sexfasciatus) is a large damselfish. It earns its name from the black-striped tail and sides, which are reminiscent of the insignia of a military Sergeant, being similar to those of the sergeant major damselfish. It grows to a length of about 16 centimetres (6.3 in).
Scissortail sergeants live on coral reefs at depths of up to 15 metres (49 ft) in tropical reaches, often living in a group surrounding a single head of coral. They are found on reefs in the Indo-Pacific region, including the Red Sea.
The fish feed upon the larvae of invertebrates, zooplankton, smaller fishes, crustaceans, and various species of algae. They are preyed upon by some members of the Labridae and Serranidae families. They lay their eggs in patches on a firm substrate and guard them vigorously till they hatch.
Scissortail sergeants are found in the Indo-Pacific including the Red Sea.[2] Areas scissortail sergeants can be found in around the Indian Ocean include the Red Sea, eastern Africa, Madagascar, Seychelles, the Persian Gulf, India, Sri Lanka, the Bay of Bengal, the Andaman Sea, Indonesia, and Australia. Pacific Ocean populations are found in the Great Barrier Reef around Australia, the Gulf of Thailand, Indonesia, the Philippines, Taiwan, Japan, and various Pacific islands all the way to Hawaii. A single record was reported recently (2017) in the eastern Mediterranean Sea near Athens, Greece, likely a result of aquarium release.[3]
[2] Adults live in coral reefs while younger individuals live in the open sea.[2] They are found at depths of 1 to 20 metres (3.3 to 65.6 ft).[2]
This fish is white.[4] They have 5 vertical bands that are black. Two horizontal bands are present on the lobes of their tail.[4] This fish can grow up to 22 centimetres (8.7 in) at maximum length.[4]
This species fish feeds on algae, zooplankton, and sometimes its own eggs.[2][4]
This fish aggregates in large groups above coral.[2]
This fish is popular in the aquarium trade. It is very aggressive and difficult to stay peaceful with other similar size fishes.[5]
Like some other fish species, male scissortail sergeants are in charge of parental care. Males are polygamous and will collect eggs from up to 12 females while females spawn with a male and then abandon their eggs. Male parental care is more common than female or biparental care in fish because territorial males are able to guard several clutches of eggs while simultaneously attracting new mates.[6]
Male scissortail sergeants undergo brood cycling, in which they alternate between a mating phase and a parental phase.[7] During the mating phase, males become gold in color and put on displays to attract egg-laying females. After two to three days in the mating phase, male scissortail sergeants will lose their gold color and transition into a four- to five-day parental phase. During the parental phase, males guard their eggs until they hatch. Filial cannibalism occurs during the parental phase.
In order to select the best quality males and maximize their offspring survival rate, females will pool their eggs with other females into a single male's territory and create a larger brood. Studies have shown that pooling to create larger broods serves to not only decrease predatory effects, but also increases paternal investment. By increasing brood size, predation rate per individual decreases as a result of dilution effects. Also, males with larger broods are less likely to cannibalize their broods. It has also been hypothesized that egg pooling is a simple imitation tactic by which females confirm the quality of the male. By copying the spawning behavior of other females, females can minimize the search costs of finding a good mate.
In order to increase the propagation of their offspring, female scissortail sergeant must also actively select for good fathers. Female fish utilize multiple strategies in order to select for male parental quality: important factors include mate size, courtship rates, and male cannibalism. Some females will monitor a male's parental quality by laying small clutches of “test eggs” in a male's territory.[8] This unusual tactic is a direct way for females to confirm the parenting ability of males who do not yet have any eggs in their brood. Females only lay one test clutch and return shortly after laying it. Capable males prove their parental quality by defending the brood and not cannibalizing the eggs. Test eggs are energetically expensive to create, so this strategy is typically only used by large females at the beginning of the mating phase.
Filial cannibalism, the act of eating one's own offspring, is a common phenomena in territorial male fish. It occurs during the parental phase of brood cycling. Embryo mortality rates are generally attributed more to filial cannibalism than to predation effects because embryo predators are largely unsuccessful. Recent studies suggest that filial cannibalism, in fact, is an evolutionarily adaptive behavior.[9] Baseline cannibalism is a result of males eating nonviable or damaged eggs, but males may cannibalize their current broods even more based on the costs and benefits of their parental investment.[10] Raising offspring requires a large energy investment. Increased filial cannibalism occurs when the cost-to-benefit ratio of raising offspring is too high.
Filial cannibalism balances the loss of foraging opportunities. When guarding their territories, investment costs are lowest for large males with easy food access. When fathers are small and are unable to forage while caring for their broods, their offspring can be used as an extra food source to offset the energy requirements needed for parental care. By eating part of his brood, a male can improve his care for the remaining young in his brood. Supplementary feeding, however, decreases the energetic costs of raising a brood and can modulate cannibalistic tendencies in male scissortail sergeants. Experiments that supply provisional food like scissortail sergeant eggs and/or crab meat to brooding males lead to a decrease in cannibalism.[11]
At the most extreme level, a male Scissortail Sergeant may cannibalize his entire brood. If the current brood is small and is not worth a male's continued investment, a male can choose to improve his future reproductive success by eating the rest of his current brood. Studies show that males who skip one mating cycle due to cannibalism or other environmental factors tend to invest more effort and have larger broods during the following season.
Cannibalism is also related to brood size and age. There is an increase in cannibalism when broods have low reproductive value. Smaller broods that are still early in the development cycle have relatively low reproductive value and are more likely to be cannibalized. Studies found that males who had their clutches reduced the first day of the parental phase were more likely to cannibalize the remaining eggs. Males whose broods are reduced on the third day of the parental phase, however, do not increase cannibalism because parental care is less costly closer to the hatch date. Males that cannibalized their broods early on in the development process, however, may mate with more females and rebrood during the same season.[12]
Filial cannibalism is also influenced by the father's relatedness to his brood. The benefits of parental investment decrease with decreasing relatedness. Sneaking by other males is a common occurrence in male scissortail sergeants. Sneaking behavior, as defined by opportunistic males that attempt to fertilize some eggs during another spawning pair, decreases the relatedness of a brood to its father. Decreased benefits due to relatedness increase the probability of cannibalism. When there are many other non-nesting males around a male's territory, scientists see increased cannibalism and reduced parental care.[13][14] This finding is attributed to the increased probability of sneaking.
The scissortail sergeant or striptailed damselfish (Abudefduf sexfasciatus) is a large damselfish. It earns its name from the black-striped tail and sides, which are reminiscent of the insignia of a military Sergeant, being similar to those of the sergeant major damselfish. It grows to a length of about 16 centimetres (6.3 in).
Scissortail sergeants live on coral reefs at depths of up to 15 metres (49 ft) in tropical reaches, often living in a group surrounding a single head of coral. They are found on reefs in the Indo-Pacific region, including the Red Sea.
The fish feed upon the larvae of invertebrates, zooplankton, smaller fishes, crustaceans, and various species of algae. They are preyed upon by some members of the Labridae and Serranidae families. They lay their eggs in patches on a firm substrate and guard them vigorously till they hatch.
Abudefduf sexfasciatus es una especie de peces de la familia Pomacentridae en el orden de los Perciformes.
Los machos pueden llegar alcanzar los 16 cm de longitud total.[1]
Se encuentra desde el Mar Rojo hasta Pinda (Mozambique), las Tuamotu y el sur del Japón.
Abudefduf sexfasciatus es una especie de peces de la familia Pomacentridae en el orden de los Perciformes.
Abudefduf sexfasciatus Abudefduf generoko animalia da. Arrainen barruko Pomacentridae familian sailkatzen da.
Espezie hau Agulhasko itsaslasterran aurki daiteke.
Abudefduf sexfasciatus Abudefduf generoko animalia da. Arrainen barruko Pomacentridae familian sailkatzen da.
Sergent-major à queue en ciseaux
Le Sergent-major à queue en ciseaux (Abudefduf sexfasciatus) est un poisson appartenant à la famille des Pomacentridae.
Ce sont des sergents-majors caractéristiques, avec un corps argenté comprimé latéralement. On les reconnaît aux 5 barres noires verticales qui ornent leurs flancs (mais s'arrêtent avant le ventre), et aux deux barres noires en ciseau au niveau de la queue (ce qui les distingue de tous les autres sergents-majors). Les juvéniles peuvent être colorés de bleu et de jaune pâle[2].
juvénile
adulte
Il fréquente les eaux tropicales du bassin Indo-Pacifique ainsi que la mer Rouge[3].
Sergent-major à queue en ciseaux
Le Sergent-major à queue en ciseaux (Abudefduf sexfasciatus) est un poisson appartenant à la famille des Pomacentridae.
Abudefduf sexfasciatus, conosciuto comunemente come pesce sergente dalla coda a forbice, è un pesce d'acqua salata appartenente alla famiglia Pomacentridae.
Questa specie è diffusa nel Mar Rosso e nell'Indo-Pacifico (dalle coste del Mozambico fino all'Isola di Pasqua). Abita barriere coralline, zone rocciose e acque aperte, spesso frequentando aree abitate da coralli molli e spugne.
Presenta un corpo alto, molto compresso ai fianchi, ovaloide, con profili dorsale e ventrale convessi. La pinna caudale è fortemente forcuta, mentre le altre pinne appuntite. La livrea è semplice: il fondo è biancastro, con sei bande verticali che scendono dall'apice della dorsale e terminano sul ventre. La quinta banda invece continua anche sulla pinna anale. Sulla coda sono presenti invece due bande orizzontali, la superiore sfociante nell'ultima banda verticale.
Raggiunge una lunghezza massima di 16 cm.
A. sexfasciatus si nutre di alghe e zooplancton.
Anche se commestibile, è pescato solamente a livello locale.
È diffuso negli acquari pubblici, meno (viste anche le dimensioni) in quelli domestici.
Abudefduf sexfasciatus, conosciuto comunemente come pesce sergente dalla coda a forbice, è un pesce d'acqua salata appartenente alla famiglia Pomacentridae.
Abudefduf sexfasciatus est piscis familiae Pomacentridarum. Nomen habet ex caude et lateribus colore nigro fasciatis, quae insignia "Serganti[1] Maioris"[2] militaris reddunt. Longitudinem fere 16 cm (sex unciarum) attinet.
Pisces larvis invertebratorum vescuntur, zooplankton quoque, et minoribus piscibus, crustaceis, variisque algarum speciebus. Comeduntur ab aliis membris familiarum Labridarum et Serranidarum. Ova pariunt.
Pisci Abudefduf sexfasciato a Lacépède anno 1801 nominato, Cuvier nomen ad Glyphisodontem coelestinum anno 1830 mutare conatus est. Quamquam alii biologi hunc conatum eodem tempore sustinebant, primum nomen paene solum hodie adhibetur.
Haec stipula ad Perciformes spectat. Amplifica, si potes! Abudefduf sexfasciatus est piscis familiae Pomacentridarum. Nomen habet ex caude et lateribus colore nigro fasciatis, quae insignia "Serganti Maioris" militaris reddunt. Longitudinem fere 16 cm (sex unciarum) attinet.
Pisces larvis invertebratorum vescuntur, zooplankton quoque, et minoribus piscibus, crustaceis, variisque algarum speciebus. Comeduntur ab aliis membris familiarum Labridarum et Serranidarum. Ova pariunt.
Šešiadryžė vienuolžuvė (lot. Abudefduf sexfasciatus, angl. Scissortail Sergeant) – vienuolžuvinių (Pomacentridae) šeimos žuvis. Kūnas iki 22 cm ilgio, baltas, su penkiomis juodomis juostomis. Išilgai nugarinio peleko abiejuose šonuose yra tamsi juosta.
Gyvena koraliniuose rifuose iki 15 m gylyje. Paplitusios tropiniuose ir vidutinio klimato vandenyse nuo Raudonosios jūros iki Japonijos ir Australijos.
Šešiadryžė vienuolžuvė (lot. Abudefduf sexfasciatus, angl. Scissortail Sergeant) – vienuolžuvinių (Pomacentridae) šeimos žuvis. Kūnas iki 22 cm ilgio, baltas, su penkiomis juodomis juostomis. Išilgai nugarinio peleko abiejuose šonuose yra tamsi juosta.
Gyvena koraliniuose rifuose iki 15 m gylyje. Paplitusios tropiniuose ir vidutinio klimato vandenyse nuo Raudonosios jūros iki Japonijos ir Australijos.
Abudefduf sexfasciatus is een straalvinnige vissensoort uit de familie van rifbaarzen of koraaljuffertjes (Pomacentridae).[1]
De naam van de soort werd in 1801 gepubliceerd door Bernard Germain de Lacépède.
Bronnen, noten en/of referenties
六線豆娘魚（学名：Abudefduf sexfasciatus），又稱六帶雀鯛，俗名為厚殼仔，為輻鰭魚綱鱸形目隆頭魚亞目雀鯛科的其中一種。[2]
本魚分布於印度太平洋區，包括紅海、東非、台灣、土木土群島、日本南部、羅得豪島、拉帕群島、夏威夷、菲律賓、印尼、澳洲北部、越南、泰國等海域。
水深0至12公尺。
本魚體呈藍灰色，腹側呈淡黃色，體呈卵圓形而側扁。吻短而略尖。眼中大，上側位。口小，上頜骨末端不及眼前緣；齒單列，齒端具缺刻。體側有5條黑色橫帶，其中最後一條位於尾柄上。體被大櫛鱗；側線之有孔鱗片19至21個。尾鰭叉形，上下緣均有一黑色橫帶。背鰭硬棘13枚；軟條12至16枚；臀鰭硬棘 2枚；軟條12至14枚。體長可達15公分。
本魚棲息於潮池或向海斜坡珊瑚茂盛的地區，常成群結隊地行動。屬雜食性，以動物性浮游生物和藻類為主食。
可供釣遊、觀賞及食用，體型小，經濟價值低。
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