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Biology ( Anglèis )

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Marine snakes in general exhibit a range of adaptations to their aquatic environment, of which the ability to stay submerged for long periods of time is particularly remarkable. They are able to avoid frequent trips to the surface to breathe because not only do they have a long, cylindrical lung that runs almost the length of their body, but they are also able to diffuse oxygen from the water through their skin (4). Although in sea kraits this form of respiration is less efficient than in other marine snakes (3), the Rennell Island sea krait frequently remains submerged for more than eight minutes (5). It forages in fairly shallow waters from a depth of only a few centimetres down to a recorded 13 metres. With frequent tongue flicking, it investigates crevices and holes, and the edges of submerged logs and branches for small fish, such as the native goby Eleotris fusca. Like many other marine snakes, this species has a potent venom, which it secretes from hollow fangs at the front of its mouth, and uses to immobilise prey before swallowing (3) (5). While sea kraits are the only group of marine snake considered to be oviparous, that is, laying eggs instead of giving birth to live offspring, the mode of reproduction has never been reliably recorded in the Rennell Island sea krait (3) (5). Furthermore, local people maintain that in contrast with other Laticauda species, the Rennell Island sea krait does actually give birth to live young (5). Although the other sea krait species are all amphibious, an essential trait for oviparous snakes that must come ashore to lay their eggs (4), during the only field study conducted on this species it was never seen on land (5).
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Conservation ( Anglèis )

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Currently, there are no known conservation measures in place for this species. However, East Rennell which includes Lake Te-Nggano, is classified as a World Heritage Site because of its exceptionally diverse and unique fauna and flora. Consequently, the area is managed according to a management plan recommended by UNESCO (United Nations Educational, Scientific and Cultural Organisation) which should ensure its long-term preservation (6).
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Description ( Anglèis )

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The genus Laticauda (sea kraits) comprises seven species typically recognised by their strong colour banding and amphibious lifestyles (1) (3) (4). While six of the seven species fit this description, the Rennell Island sea krait is intriguingly different. Instead of having the conspicuous pattern of light and dark bands, this species is uniformly dark brown in colouration and only exhibits relatively faint banding. It is also considered a dwarf species, because of its relatively small size compared with the other Laticauda species (5). In common with the body shape of other sea kraits, and indeed most other marine snakes, it has a paddle shaped tail with which it propels itself through the water (3) (4).
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Habitat ( Anglèis )

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The lake in which this species is found is narrowly separated from the sea and has a salt content about one third that of salt water. It mostly inhabits shallow parts of the lake, which lies within a limestone (raised coral reef) basin (1) (5).
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Range ( Anglèis )

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Despite its partly misleading name, rather than occurring in the sea, the Rennell Island sea krait is restricted to a lake (Lake Te-Nggano) on Rennell Island in the Solomon Islands (2) (5).
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Status ( Anglèis )

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Classified as Vulnerable (VU) on the IUCN Red List (2).
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Threats ( Anglèis )

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The Rennell Island sea krait is the only species of marine snake currently listed on the IUCN Red List. Despite the absence of any significant direct threats, it is classified as Vulnerable because it has a very small and restricted range (2).
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Distribution ( Anglèis )

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Continent: Oceania
Distribution: Solomon Islands (Rennell)
Type locality: Lake Te-Nggano on Rennell Island
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Common Names ( Anglèis )

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Crocker's sea snake

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Distribution ( Anglèis )

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Solomon Islands (Lake Te-Nggano, Rennell Island).

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Notes ( Anglèis )

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Holotype: CAS 72001, according to original description.

Type-locality: Lake Tungano [Te-Nggano], Rennell Island, Solomon Islands

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Crocker's sea snake ( Anglèis )

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Crocker's sea snake (Laticauda crockeri) is a species of venomous snake in the subfamily Hydrophiinae of the family Elapidae. The species is native to Oceania.

Etymology

The specific name, crockeri, is in honor of American railroad magnate Charles Templeton Crocker (1885-1948), who allowed the California Academy of Sciences to use his yacht, the Zaca, for scientific expeditions.[2]

Geographic range

L. crockeri is endemic to a single brackish lake (Lake Te-Nggano) on Rennell Island in the Solomon Islands.[3]

Description

L. crockeri is sexually dimorphic, with females growing to be longer and heavier than males.[1] Females may attain a snout-to-vent length (SVL) of 80 cm (31 in), but males may attain only 62 cm (24 in) in SVL.[4] Maximum tail length is about 9 cm (3.5 in) in both sexes.[4]

Conservation status

L. crockeri is currently listed as "Vulnerable" by the International Union for Conservation of Nature (IUCN) due to the extremely limited distribution of the species.[1]

References

  1. ^ a b c Lane, A.; Guinea, M. (2010). "Laticauda crockeri ". IUCN Red List of Threatened Species. 2010: e.T11369A3273817. doi:10.2305/IUCN.UK.2010-4.RLTS.T11369A3273817.en. Retrieved 16 November 2021.
  2. ^ Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. ISBN 978-1-4214-0135-5. (Laticauda crockeri, p. 61).
  3. ^ Gill, B.J.; Whitaker, A.H. (2014). "Records of sea-kraits (Serpentes: Laticaudidae: Laticauda) in New Zealand". Records of the Auckland Museum. 49: 39–42. ISSN 1174-9202.
  4. ^ a b Species Laticauda crockeri at The Reptile Database www.reptile-database.org.
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Crocker's sea snake: Brief Summary ( Anglèis )

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Crocker's sea snake (Laticauda crockeri) is a species of venomous snake in the subfamily Hydrophiinae of the family Elapidae. The species is native to Oceania.

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Laticauda crockeri ( Spagneul; Castilian )

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Laticauda crockeri es una especie de serpientes de la familia Elapidae.[2]

Distribución geográfica

Es endémica de las islas de Rennell y Bellona (Islas Salomón).

Referencias

  1. Lane, A. & Guinea, M. (2010). «Laticauda crockeri». Lista Roja de especies amenazadas de la UICN 2015.4 (en inglés). ISSN 2307-8235. Consultado el 9 de mayo de 2016.
  2. Uetz, P. & Jirí Hošek (ed.). «Laticauda rennellensis». Reptile Database (en inglés). Reptarium. Consultado el 9 de mayo de 2016.

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Laticauda crockeri: Brief Summary ( Spagneul; Castilian )

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Laticauda crockeri es una especie de serpientes de la familia Elapidae.​

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Laticauda crockeri ( Basch )

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(RLQ=window.RLQ||[]).push(function(){mw.log.warn("Gadget "ErrefAurrebista" was not loaded. Please migrate it to use ResourceLoader. See u003Chttps://eu.wikipedia.org/wiki/Berezi:Gadgetaku003E.");});
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Laticauda crockeri: Brief Summary ( Basch )

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Laticauda crockeri Laticauda generoko animalia da. Narrastien barruko Hydrophiidae familian sailkatuta dago.

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Laticauda crockeri ( Fransèis )

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Laticauda crockeri ou tricot rayé des Salomon est une espèce de serpents de la famille des Elapidae[1].

Répartition

 src=
Répartition de l'espèce.

Cette espèce est endémique du lac Te-Nggano, un lac d'eau saumâtre et aussi le plus grand lagon surélevé au monde (superficie de 155 km2), sur l'île Rennell dans l'archipel des Salomon[1].

Description

L'holotype de Laticauda crockeri[2] mesure 479 mm dont 64 mm pour la queue. Les plus grands individus[1] mesurent 615 mm pour les mâles et 795 mm pour les femelles. Cette espèce[2] très mal connue présente un corps uniformément brun sombre ou porte de 27 à 47 anneaux plus sombre, avec une tache jaune au niveau de l'anus. On ne l'a jamais vu à terre : ce serpent mène peut-être une vie entièrement aquatique. Il chasse jusqu'à une profondeur de 13 m maximum des petits gobies Eleotris fusca et cohabite avec des tricots rayés communs[3].

Il s'agit de l'une des deux espèces de serpents dits marins à vivre en eau douce (plus exactement saumâtre), l'autre espèce étant Leioselasma semperi. C'est un serpent ovipare[1].

Étymologie

Cette espèce est nommée en l'honneur de Templeton Crocker[2].

Publication originale

  • Slevin, 1934 : The Templeton Crocker Expedition to Western Polynesian and Melanesian Islands, 1933. No. 15. Notes on the reptiles and amphibians, with the description of a new species of sea-snake. Proceedings of the California Academy of Sciences, vol. 21, no 15, p. 183-188 (texte intégral).

Notes et références

  1. a b c et d Reptarium Reptile Database, consulté lors d'une mise à jour du lien externe
  2. a b et c Slevin, 1934 : The Templeton Crocker Expedition to Western Polynesian and Melanesian Islands, 1933. No. 15. Notes on the reptiles and amphibians, with the description of a new species of sea-snake. Proceedings of the California Academy of Sciences, vol. 21, no 15, p. 183-188 (texte intégral).
  3. Alain Diringer (préf. Marc Taquet), Mammifères marins et reptiles marins de l'océan Indien et du Pacifique, Éditions Orphie, 2020, 272 p. (ISBN 979-10-298-0254-6), Tricot rayé des Salomon page 190
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Laticauda crockeri: Brief Summary ( Fransèis )

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Laticauda crockeri ou tricot rayé des Salomon est une espèce de serpents de la famille des Elapidae.

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Laticauda crockeri ( Latin )

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Laticauda crockeri est species serpentis familiae Elapidarum, in Lacu Tenago, in singulo aquae amarae corpore Insulae Rennell in Insulis Salomonis endemica.

Nunc habetur vulnerabilis ab IUCN ob distributionem geographicam angustissimam.

Fons

Avis Haec stipula ad reptile spectat. Amplifica, si potes!
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Laticauda crockeri: Brief Summary ( Latin )

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Laticauda crockeri est species serpentis familiae Elapidarum, in Lacu Tenago, in singulo aquae amarae corpore Insulae Rennell in Insulis Salomonis endemica.

Nunc habetur vulnerabilis ab IUCN ob distributionem geographicam angustissimam.

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Laticauda crockeri ( vietnamèis )

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Laticauda crockeri là một loài rắn trong họ Rắn hổ. Loài này được Slevin mô tả khoa học đầu tiên năm 1934.[1]

Hình ảnh

Chú thích

  1. ^ Laticauda crockeri. The Reptile Database. Truy cập ngày 29 tháng 5 năm 2013.

Tham khảo


Hình tượng sơ khai Bài viết về họ Rắn hổ này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn.
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Laticauda crockeri: Brief Summary ( vietnamèis )

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Laticauda crockeri là một loài rắn trong họ Rắn hổ. Loài này được Slevin mô tả khoa học đầu tiên năm 1934.

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クロッカーウミヘビ ( Giaponèis )

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クロッカーウミヘビ 保全状況評価 VULNERABLE
(IUCN Red List Ver.2.3 (1994))
Status iucn2.3 VU.svg 分類 : 動物界 Animalia : 脊索動物門 Chordata 亜門 : 脊椎動物亜門 Vertebrata : 爬虫綱 Reptilia : 有鱗目 Squamata 亜目 : ヘビ亜目 Serpentes : コブラ科 Elapidae 亜科 : ウミヘビ亜科 Hydrophiinae : エラブウミヘビ属 Laticauda : クロッカーウミヘビ L. crockeri 学名 Laticauda crockeri Slevin, 1934 和名 クロッカーウミヘビ 英名 Crocker's sea krait

Laticauda crockeri distribution (colored).png

クロッカーウミヘビ学名Laticauda crockeri)は、コブラ科エラブウミヘビ属に分類されるヘビ

分布[編集]

ソロモン諸島レンネル島テンガノ湖)固有種[1]

形態[編集]

頭胴長45-80cm。[1]頭部は長方形。[1]吻端を覆う鱗(吻端板)は1枚で、左右の鼻孔が開口する鱗(鼻板)は接しない。[1]額前方を覆う鱗(前額板)は2枚。[1]胴体中央部の斜めに列になった背面の鱗の数(体列鱗数)は19か21。[1]腹面を覆う鱗の数(腹板数)は193-210。[1]体色は暗褐色で、黒く太い27-41本の横帯が入るが全身が黒い個体もいる。[1]

オスの総排出口から後部の鱗の数(尾下板数)は34-39。[1]メスの尾下板数は24-30。[1]

[編集]

神経毒を持つ。[1]

生態[編集]

汽水湖に生息し、岩場を好む。[1]

食性は動物食で、ハゼのみを食べる。[1]

人間との関係[編集]

分布が極めて限定的でハゼ1種のみを食べることから、環境の変化による絶滅が懸念されている。[1]

関連項目[編集]

参考文献[編集]

[ヘルプ]
  1. ^ a b c d e f g h i j k l m n 小原秀雄・浦本昌紀・太田英利・松井正文編著 『動物世界遺産 レッド・データ・アニマルズ7 オーストラリア、ニューギニア』、講談社2000年、214頁。

外部リンク[編集]

執筆の途中です 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)。
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クロッカーウミヘビ: Brief Summary ( Giaponèis )

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クロッカーウミヘビ(学名:Laticauda crockeri)は、コブラ科エラブウミヘビ属に分類されるヘビ

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