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Yellow-bellied sea snake

January 01, 1970

The yellow-bellied sea snake (Hydrophis platurus) is a venomous species of snake from the subfamily Hydrophiinae (the sea snakes) found in tropical oceanic waters around the world except for the Atlantic Ocean. For many years, it was placed in the monotypic genus Pelamis, but recent molecular evidence indicates it lies within the genus Hydrophis.

Yellow-bellied sea snake
Yellow-bellied sea snake
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Elapidae
Genus: Hydrophis
Species:
H. platurus
Binomial name
Hydrophis platurus
(Linnaeus, 1766)
Yellow-bellied sea snake range[2]
Synonyms
List
Yellow form from the Golfo Dulce on the Pacific coast of Costa Rica

Taxonomy edit

In 1766, Linnaeus published the original description of the yellow-bellied sea snake, naming it Anguis platura (Anguis meaning snake). In 1803, François Marie Daudin created the new genus Pelamis and assigned this species to it, referring to it as Pelamis platuros. In 1842, Gray described what he thought was a new species and called it Pelamis ornata (subsequently P. ornata became a synonym of P. platura). The commonly used genus name Pelamis is derived from the Ancient Greek word for "tunny fish", which presumably refers to the habitat or what Daudin thought they ate. The specific name platurus is a combination of the Ancient Greek words platys "flat" and oura "tail", referring to the flattened tail. The word Pelamis is a feminine noun and means young or small tunny fish. In 1872, Stoliczka introduced the name Pelamis platurus (still the most used scientific name by scientists today), but used the incorrect ending -us instead of -a which a feminine noun requires.[5] A few recent examples exist of scientists' beginning to use the grammatically correct name Pelamis platura, e.g., Bohme 2003 and the Reptile Database with its page headed Pelamis platura (Linnaeus, 1766), which includes an extensive synonymy of the different scientific names which have been used for the yellow-bellied sea snake.[6] The same rules apply for the most recent taxonomic name of Hydrophis platurus.

To further complicate the nomenclature, the taxonomic status of sea snakes is still under review, with recent authors suggesting a dismantling of monotypic genera, such as Pelamis, in favour of a single genus, Hydrophis, in order to reduce paraphyly and better reflect phylogenetic relationships.[7]

Other common names are yellowbelly sea snake or pelagic sea snake.[citation needed]

Evolution edit

Sea snakes are a monophyletic group (Hydrophiinae) that diverged from the front-fanged Australasian venomous snakes (Elapidae) about 10 million years ago.[8][9] The yellow-bellied sea snake is a part of the rapidly radiating Hydrophis group.[10]

Description edit

 
Hydrophis platurus, a front-fanged venomous snake, related to the brown snakes, cobras and taipans (Elapidae)

The yellow-bellied sea snake, as the name implies, has a distinctive bicolor pattern with a yellow underbelly and brown back, making it easily distinguishable from other sea snake species. Yellow-bellied sea snakes, like many other species of sea snake, are fully adapted to living their whole lives at sea: mating, eating and giving birth to live young (ovoviviparous). Adaptations to aquatic life include the reduced ventral scale size, laterally compressed body and paddle-tail for swimming,[11][12] valved nostrils and palatine seal for excluding seawater, and cutaneous gas exchange for prolonging dive times.[12][13][14] This species can uptake up to 33% of its oxygen requirements through the skin while diving and swimming at the surface of the water.[15] Sea snakes also have a special salt gland located in the lower jaw that was formerly believed to filter out salt from the surrounding seawater[16] but has been found not to be used for that purpose, as sea snakes drink fresh water only.[17]

See snake scales for terminology used here

Morphology edit

The body of this snake is compressed, with the posterior less than half the diameter of the neck; the body scales are juxtaposed, subquadrangular in shape, and in 23–47 rows around the thickest part of the body; ventral scales, 264–406 in number, are very small and, if distinct, divided by a latitudinal groove, but usually are indistinguishable from adjacent body scales. The head is narrow, with an elongated snout; head shields are entire, nostrils are superior, and nasal shields are in contact with one another; the prefrontal scale is in contact with second upper labial; one or two preoculars, two or three postoculars, and two or three small anterior temporals are present; seven or eight upper labials are found, with four or five below the eye, but separated from the border by a subocular. Colors of the snake are variable, but most often distinctly bicolored, black above, yellow or brown below, with the dorsal and ventral colors sharply demarcated from one another; ventrally, there may be a series of black spots or bars on the yellow or brown background, or the yellow may extend dorsally so there is only a narrow middorsal black stripe, or a series of black crossbars.[18] Total length for males is up to 720 mm (28 in), for females up to 880 mm (35 in); tail length for males is up to 80 mm (3.1 in), females up to 90 mm (3.5 in).

Distribution and habitat edit

 
Hydrophis platurus xanthos

The yellow-bellied sea snake is one of the most widely distributed snakes in the world.[19] It is completely pelagic and is often observed on oceanic drift lines, using surface currents and storms to move around the ocean.[20] Their distribution appears to be largely determined by favourable water temperatures, oceanic currents and recent formation of land bridges that have blocked farther dispersal.

The yellow-bellied sea snake has an extensive distribution covering the entire tropical Indo-Pacific, as well as extending to Costa Rica, southern California, and northern Peru.[21][22] It is the only sea snake to have reached the Hawaiian Islands.[23] The favoured habitat for hunting and reproduction includes free floating mats of sea kelp occurring in the Indian Ocean. The species is the most commonly beached sea snake on the coast of Southwest Australia, including records at beaches near metropolitan areas.[24] It is also reported from Christmas Island and Cocos (Keeling) Islands (Australia).[25]

The yellow-bellied sea snake requires a minimum of 16–18 °C (60.8 to 64.4 °F) to survive, long-term.[26] However, the species has been reported in colder waters of the Pacific, such as the coasts of southern California, Mexico, Tasmania, and New Zealand,[27] the latter being a country that would otherwise be free of snakes were it not for the infrequent strandings of yellow-bellied sea snakes and banded sea kraits.[28] Nonetheless, these wayward individuals make the yellow-bellied sea snake the most commonly-seen snake (and sea snake) in New Zealand, to the degree that the species is considered endemic (indigenous) to New Zealand and worthy of protection under the Wildlife Act 1953.[29] These colder water occurrences are believed to be linked to El Niño, among other severe weather events, possibly creating unusually strong, new ocean currents that transport the snakes far off-course.[30][31][32] In October 2015, beached yellow-bellied sea snakes were reported and photographed on beaches in Ventura County, California, well outside their normal range, for the first time in 30 years.[30] A few months later, in January 2016, a stranded individual was found in Coronado, California, washed-up on Coronado Beach's north end (better known as Dog Beach), just south of Naval Air Station North Island (NASNI). The specimen was subsequently transported to and examined at the Scripps Institute of Oceanography, La Jolla.[33]

The yellow-bellied sea snake is the only sea snake to have been found in the Atlantic Ocean, although only in limited circumstances. The yellow-bellied sea snake's occurrence into the Atlantic is not considered a part of its native range, but rather a dispersal from its native Pacific range.[34]

The yellow-bellied sea snake has been found in all the countries of Africa's eastern coast and all eastern islands, like Djibouti, Eritrea, Kenya, Madagascar, Mauritius, Mayotte, Mozambique, Réunion, Seychelles, Somalia, South Africa and Tanzania.[25] On the African Atlantic coast they have been reported to occur in the Benguela Current, with specimens found along the coasts of South Africa and Namibia.[35][36]

The yellow-bellied sea snake has also been found in the Colombian Caribbean four separate times, making it the only sea snake to be found in the Caribbean Sea. However these occurrences are believed to be the result of human activity, be it ship discharge, intentional release or via the Panama Canal, as it is not considered a part of their native range. This is due to the land bridge between North and South America (Isthmus of Panama), which formed from about 10 million years ago to 3 million years ago[37] (i.e., continental drift), acting as a dispersal barrier and preventing entry into the Caribbean Sea from the Pacific Ocean. The man-made Panama Canal has not made a crossing of the isthmus possible presumably because it is fresh water.[38]

Due to the wide distribution of the species and relative lack of dispersal barriers, it has been assumed that individuals from different localities represent a single breeding population (i.e., high gene flow). However, a study that used haplotype networks in two populations from Costa Rica suggests that shallow genetic population structure exists, which reflects variation in colour patterns (brown and yellow in Golfo de Papagayo and completely yellow in Golfo Dulce).[39]

Behaviour edit

Contrary to past beliefs, sea snakes require fresh water to survive and the yellow-bellied sea snake drinks precipitation that forms on the surface of sea water.[40] This species has been reported to survive severe dehydration of up to 7 months during seasonal drought.[41]

Yellow-bellied sea snakes breed in warm waters; they are ovoviviparous with a gestation period around 6 months. According to Ditmars, females bear live young in tidal pools.[42] They move poorly on land due to their smaller belly scales that form a ventral keel.[13] They are sometimes observed in large aggregations of thousands on the surface of the water in oceanic drift lines, which has been proposed as a strategy to catch prey.[43] They hunt by floating on the surface of the water to attract pelagic fish that are seeking shelter; prey are captured via a backwards swimming motion and rapid lunge of the jaws.[20] The ability to swim backwards is an unusual and distinguishing characteristic of this species.[24] Heatwole proposed that these snakes find their prey by sensing the vibration generated by fish movement.[44]

Venom edit

The venom of this species is highly potent, like that of other sea snakes.[45] Bites are rare and the most common victims are fishermen who try to get them out of fishing nets.[46] The subcutaneous LD50 of the venom is 0.067 mg/kg and the venom yield per bite is 1.0–4.0 mg.[47][48] Yellow-bellied sea snake venom contains several different neurotoxins and two other isotoxins.[49]

Antivenom edit

Sea snake venom can cause damage to skeletal muscle with consequent myoglobinuria, neuromuscular paralysis or direct renal damage. The venoms of significant species of sea snake are neutralised with Commonwealth Serum Laboratories Ltd (of Melbourne, Australia) sea snake (Enhydrina schistosa) antivenom.[50][51] If that preparation is not available, tiger snake or polyvalent antivenom should be used. No deaths have been recorded from bites in Australian waters.[52][53] The E. schistosa antivenom was tested specifically on Pelamus platurus, and it effectively neutralised the venom.[54]

Cited references edit

  1. ^ Guinea, M.; Lukoschek, V.; Cogger, H.; Rasmussen, A.; Murphy, J.; Lane, A.; Sanders, K. Lobo, A.; Gatus, J.; Limpus, C.; Milton, D.; Courtney, T.; Read, M.; Fletcher, E.; Marsh, D.; White, M.-D.; Heatwole, H.; Alcala, A.; Voris, H.; Karns, D. (2017). "Hydrophis platurus". IUCN Red List of Threatened Species. 2017: e.T176738A115883818. doi:10.2305/IUCN.UK.2017-2.RLTS.T176738A115883818.en. Retrieved 12 November 2021.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  2. ^ Guinea, M.; Lukoschek, V.; Cogger, H.; Rasmussen, A.; Murphy, J.; Lane, A.; Sanders, K.; Lobo, A.; Gatus, J.; Limpus, C.; Milton, D.; Courtney, T.; Read, M.; Fletcher, E.; Marsh, D.; White, M.-D.; Heatwole, H.; Alcala, A.; Voris, H.; Karns, D. (2017). "Hydrophis platurus". IUCN Red List of Threatened Species. 2010: e.T176738A115883818.
  3. ^ Boulenger, G.A. 1896. Catalogue of the Snakes in the British Museum (Natural History). Volume III., Containing the Colubridæ (Opisthoglyphæ and Proteroglyphæ)... Trustees of the British Museum (Natural History). London. pp. 266–268.
  4. ^ The Reptile Database. www.reptile-database.org.
  5. ^ Lanza, B.; Boscherini, S. (2000). "The gender of the genera Podarcis Wagler 1830 (Lacertidae), Pelamis Daudin 1803 (Hydrophiidae) and Uropeltis Cuvier 1829 (Uropeltidae)". Tropical Zoology. 13 (2): 327–329. doi:10.1080/03946975.2000.10531139.
  6. ^ Pelamis platura at the Reptarium.cz Reptile Database. Accessed May 2008
  7. ^ Rasmussen, Arne Redsted; Sanders, Kate Laura; Guinea, Michael L.; Amey, Andrew P. (2014-01-01). "Sea snakes in Australian waters (Serpentes: subfamilies Hydrophiinae and Laticaudinae)-a review with an updated identification key". Zootaxa. 3869 (4): 351–371. doi:10.11646/zootaxa.3869.4.1. ISSN 1175-5334. PMID 25283923. S2CID 207552237.
  8. ^ Lukoschek, Vimoksalehi; Keogh, J. Scott (2006-11-01). "Molecular phylogeny of sea snakes reveals a rapidly diverged adaptive radiation". Biological Journal of the Linnean Society. 89 (3): 523–539. doi:10.1111/j.1095-8312.2006.00691.x. hdl:1885/20734. ISSN 1095-8312.
  9. ^ Pyron, R. Alexander; Burbrink, Frank T.; Colli, Guarino R.; de Oca, Adrian Nieto Montes; Vitt, Laurie J.; Kuczynski, Caitlin A.; Wiens, John J. (2011-02-01). "The phylogeny of advanced snakes (Colubroidea), with discovery of a new subfamily and comparison of support methods for likelihood trees". Molecular Phylogenetics and Evolution. 58 (2): 329–342. doi:10.1016/j.ympev.2010.11.006. ISSN 1095-9513. PMID 21074626.
  10. ^ Sanders, Kate L.; Lee, Michael S. Y.; Mumpuni; Bertozzi, Terry; Rasmussen, Arne R. (2013-03-01). "Multilocus phylogeny and recent rapid radiation of the viviparous sea snakes (Elapidae: Hydrophiinae)". Molecular Phylogenetics and Evolution. 66 (3): 575–591. doi:10.1016/j.ympev.2012.09.021. PMID 23026811.
  11. ^ Sanders, Kate L.; Rasmussen, Arne R.; Elmberg, Johan (2012-08-01). "Independent Innovation in the Evolution of Paddle-Shaped Tails in Viviparous Sea Snakes (Elapidae: Hydrophiinae)". Integrative and Comparative Biology. 52 (2): 311–320. doi:10.1093/icb/ics066. ISSN 1540-7063. PMID 22634358.
  12. ^ a b Aubret, F.; Shine, R. (2008-04-01). "The origin of evolutionary innovations: locomotor consequences of tail shape in aquatic snakes". Functional Ecology. 22 (2): 317–322. doi:10.1111/j.1365-2435.2007.01359.x. ISSN 1365-2435.
  13. ^ a b Brischoux, François; Shine, Richard (2011-05-01). "Morphological adaptations to marine life in snakes". Journal of Morphology. 272 (5): 566–572. doi:10.1002/jmor.10933. ISSN 1097-4687. PMID 21337377. S2CID 26527627.
  14. ^ Seymour, Roger S. (1974-08-09). "How sea snakes may avoid the bends". Nature. 250 (5466): 489–490. Bibcode:1974Natur.250..489S. doi:10.1038/250489a0. PMID 4469599. S2CID 4162151.
  15. ^ Graham, J. B. (1974-07-01). "Aquatic respiration in the sea snake Pelamis platurus". Respiration Physiology. 21 (1): 1–7. doi:10.1016/0034-5687(74)90002-4. ISSN 0034-5687. PMID 4846936.
  16. ^ Dunson, William A.; Packer, Randall K.; Dunson, Margaret K. (1971-01-01). "Sea Snakes: An Unusual Salt Gland under the Tongue". Science. 173 (3995): 437–441. Bibcode:1971Sci...173..437D. doi:10.1126/science.173.3995.437. JSTOR 1732639. PMID 17770448. S2CID 41474438.
  17. ^ . Phenomena. 18 March 2014. Archived from the original on March 19, 2014.
  18. ^ (M.A. Smith, 1943: 476–477, gives more complete descriptions of the color pattern variants).
  19. ^ Rasmussen, Arne Redsted; Murphy, John C.; Ompi, Medy; Gibbons, J. Whitfield; Uetz, Peter (2011). "Marine Reptiles". PLOS ONE. 6 (11): e27373. Bibcode:2011PLoSO...627373R. doi:10.1371/journal.pone.0027373. PMC 3210815. PMID 22087300.
  20. ^ a b Heatwole, Harold (1993). Fauna of Australia: Family Hydrophiinae. Canberra: AGPS. p. 15.
  21. ^ Quiñones, Javier; Burneo, Karla García; Barragan, Claudio (2014-12-09). "Rediscovery of the Yellow-bellied Sea Snake, Hydrophis platurus (Linnaeus, 1766) in Máncora, northern Perú". Check List. 10 (6): 1563–1564. doi:10.15560/10.6.1563.
  22. ^ Palermo, Elizabeth (December 28, 2015). "Venomous Sea Snake Washes Up on California Beach, Surprising Scientists". Scientific American. Retrieved 2016-03-30.
  23. ^ Liptow, J. (1999). "Pelamis platura". Animal Diversity Web. University of Michigan. Retrieved 17 December 2022.
  24. ^ a b Browne-Cooper, R.; Bush, B.; Maryan, B.; Robinson, D. (2007). Reptiles and frogs in the bush : southwestern Australia. University of Western Australia Press. p. 273. ISBN 9781920694746.
  25. ^ a b Guinea, M. (15 February 2009). "IUCN Red List of Threatened Species: Hydrophis platurus". IUCN Red List of Threatened Species.
  26. ^ Dunson and Ehlert 1971.
  27. ^ "Swimmers told not to be surprised of poisonous sea snake". Waikato Times. Hamilton, New Zealand: Fairfax New Zealand. 4 January 2012. Retrieved 26 April 2012.
  28. ^ Natural History Information Centre. . Auckland, New Zealand: Auckland War Memorial Museum. Q. Are there any snakes in New Zealand?. Archived from the original on 29 November 2014. Retrieved 26 April 2012.
  29. ^ 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. JSTOR 43264621. Wikidata Q58629017.
  30. ^ a b "Blame El Niño for poisonous sea snake found on Ventura County beach". Los Angeles Times. 17 October 2015. Retrieved 2015-10-25.
  31. ^ "Yellow-bellied Sea Snake – Australian Museum". australianmuseum.net.au. Retrieved 2016-03-30.
  32. ^ "El Nino brings sea snake to California's coast". CNN. 17 October 2015. Retrieved 2015-10-25.
  33. ^ "Yellow-bellied Sea Snake from Coronado Beach, Coronado, San Diego, California". iNaturalist. 12 January 2016.
  34. ^ Harvey B Lillywhite, Coleman M Sheehy, Harold Heatwole, François Brischoux, David W Steadman; "Why Are There No Sea Snakes in the Atlantic?", BioScience, Volume 68, Issue 1, 1 January 2018, Pages 15–24, https://doi.org/10.1093/biosci/bix132
  35. ^ Sexton, Owen J. (1967-01-01). "Population Changes in a Tropical Lizard Anolis limifrons on Barro Colorado Island, Panama Canal Zone". Copeia. 1967 (1): 219–222. doi:10.2307/1442198. JSTOR 1442198.
  36. ^ Also see references in The Living Shores of Southern Africa, Margo and George Branch, pp. 130–131, Macmillan South Africa (Publishers), Johannesburg and "Snake versus Man" Johan Marais, pp. 50–51, C. Struik Publishers, Cape Town.
  37. ^ "North and South America Came Together Much Earlier Than Thought: Study". NBC News. Retrieved 2016-03-30.
  38. ^ Hernández-Camacho, J.I. & Álvarez-León, Ricardo & Renjifo-Rey, J.M.. (2006). Pelagic sea snake Pelamis platurus (Linnaeus, 1766) (Reptilia: Serpentes: Hydrophiidae) is found on the Caribbean Coast of Colombia. Mem. Fund. La. Salle Cien. Nat.. 164. 143-152.
  39. ^ Sheehy, Coleman M.; Solórzano, Alejandro; Pfaller, Joseph B.; Lillywhite, Harvey B. (2012-08-01). "Preliminary insights into the phylogeography of the yellow-bellied sea snake, Pelamis platurus". Integrative and Comparative Biology. 52 (2): 321–330. doi:10.1093/icb/ics088. ISSN 1557-7023. PMID 22659201.
  40. ^ Lillywhite, Harvey B.; Brischoux, François; Sheehy, Coleman M.; Pfaller, Joseph B. (2012-08-01). "Dehydration and drinking responses in a pelagic sea snake". Integrative and Comparative Biology. 52 (2): 227–234. doi:10.1093/icb/ics039. ISSN 1557-7023. PMID 22510231.
  41. ^ Lillywhite, Harvey B.; Sheehy, Coleman M.; Brischoux, François; Grech, Alana (2014-05-07). "Pelagic sea snakes dehydrate at sea". Proceedings of the Royal Society of London B: Biological Sciences. 281 (1782): 20140119. doi:10.1098/rspb.2014.0119. ISSN 0962-8452. PMC 3973276. PMID 24648228.
  42. ^ Schmidt, K.P. & D.D. Davis. 1941. Field Book of Snakes of the United States and Canada. G.P. Putnam's Sons. New York. p. 280.
  43. ^ Brischoux, François; Lillywhite, Harvey B. (2011-06-14). "Light- and flotsam-dependent 'float-and-wait' foraging by pelagic sea snakes (Pelamis platurus)". Marine Biology. 158 (10): 2343–2347. doi:10.1007/s00227-011-1738-z. ISSN 0025-3162. S2CID 86115673.
  44. ^ Heatwole, Harold (1999-01-01). Sea Snakes. UNSW Press. ISBN 9780868407760.
  45. ^ "SnakeBiteTemplate3.pmd" (PDF).
  46. ^ Cañas, Carlos A.; Castaño-Valencia, Santiago; Castro-Herrera, Fernando (September 2022). "Biological and medical aspects related to the yellow-bellied sea snake Hydrophis platurus (Linnaeus, 1766): A view from Colombia". Travel Medicine and Infectious Disease. 49: 102410. doi:10.1016/j.tmaid.2022.102410. ISSN 1477-8939.
  47. ^ LD50 value of venomous snakes 2012-02-01 at the Wayback Machine
  48. ^ [1] LD stands for "Lethal dose".
  49. ^ Mori, Nobuhiro & Ishizaki, Hiroyuki & Tu, Anthony. (1989). "Isolation and Characterization of Pelamis platurus (Yellow-bellied Sea Snake) Postsynaptic Isoneurotoxin". The Journal of Pharmacy and Pharmacology. 41. 331-4. 10.1111/j.2042-7158.1989.tb06466.x.
  50. ^ P. Gopalakrishnakone (1994). Sea Snake Toxinology. NUS Press. pp. 27–. ISBN 978-9971-69-193-6.
  51. ^ Hawgood, B. J. (1 March 1998). "Hugh Alistair Reid OBE MD: investigation and treatment of snake bite". Toxicon. 36 (3): 431–446. doi:10.1016/s0041-0101(97)00082-2. PMID 9637363.
  52. ^ https://www.flyingdoctor.net/IgnitionSuite/uploads/docs/snakebite.pdf Management of snake bites in Australia and Papua New Guinea. Accessed May 2008
  53. ^ http://www.emedicine.com/emerg/topic543.htm Accessed May 2008
  54. ^ http://www.ajtmh.org/cgi/content/abstract/23/1/135 Published 1973. Accessed May 2008.

Other sources edit

  • Ditmars, R.L. 1936. The Reptiles of North America. Doubleday, Doran & Co. New York. 476 pp.
  • Hecht, M. K.; Kropach, C.; Hecht, B. M. (1974). "Distribution of the yellow-bellied sea snake Pelamis platurus, and its significance in relation to the fossil record". Herpetologica. 30: 387–395.
  • Kropach, C. 1975 The yellow-bellied sea snake, Pelamis, in the eastern Pacific. pp. 185–213 in: Dunson, W., ed., The Biology of Sea Snakes. Univ. Park Press, Baltimore, xi + 530 pp.
  • Smith, M.A. 1943. The Fauna of British India, Ceylon and Burma, including the Whole of the Indo-Chinese Sub-region. Reptiles and Amphibians. Vol. III. – Serpentes. Taylor & Francis. London. 583 pp.

External links edit

  • Pelagic Sea Snakes and the animals that live on them, Life is Short but Snakes are Long

January 01, 1970
yellow, bellied, snake, yellow, bellied, snake, hydrophis, platurus, venomous, species, snake, from, subfamily, hydrophiinae, snakes, found, tropical, oceanic, waters, around, world, except, atlantic, ocean, many, years, placed, monotypic, genus, pelamis, rece. The yellow bellied sea snake Hydrophis platurus is a venomous species of snake from the subfamily Hydrophiinae the sea snakes found in tropical oceanic waters around the world except for the Atlantic Ocean For many years it was placed in the monotypic genus Pelamis but recent molecular evidence indicates it lies within the genus Hydrophis Yellow bellied sea snake Yellow bellied sea snake Conservation status Least Concern IUCN 3 1 1 Scientific classification Domain Eukaryota Kingdom Animalia Phylum Chordata Class Reptilia Order Squamata Suborder Serpentes Family Elapidae Genus Hydrophis Species H platurus Binomial name Hydrophis platurus Linnaeus 1766 Yellow bellied sea snake range 2 Synonyms List Anguis platura Linnaeus 1766Hydrus bicolor Schneider 1799Hydrophis platura Latreille 1801Pelamis platuros Daudin 1803Pelamis bicolor Daudin 1803Hydrophis pelamis Schlegel 1837Pelamis ornata Gray 1842Pelamis platurus Stoliczka 1872Hydrus platurus Boulenger 1890Pelamydrus platurus Schmidt amp Davis 1941Pelamis platura Bohme 2003 3 4 Yellow form from the Golfo Dulce on the Pacific coast of Costa Rica Contents 1 Taxonomy 1 1 Evolution 2 Description 2 1 Morphology 3 Distribution and habitat 4 Behaviour 5 Venom 5 1 Antivenom 6 Cited references 7 Other sources 8 External linksTaxonomy editIn 1766 Linnaeus published the original description of the yellow bellied sea snake naming it Anguis platura Anguis meaning snake In 1803 Francois Marie Daudin created the new genus Pelamis and assigned this species to it referring to it as Pelamis platuros In 1842 Gray described what he thought was a new species and called it Pelamis ornata subsequently P ornata became a synonym of P platura The commonly used genus name Pelamis is derived from the Ancient Greek word for tunny fish which presumably refers to the habitat or what Daudin thought they ate The specific name platurus is a combination of the Ancient Greek words platys flat and oura tail referring to the flattened tail The word Pelamis is a feminine noun and means young or small tunny fish In 1872 Stoliczka introduced the name Pelamis platurus still the most used scientific name by scientists today but used the incorrect ending us instead of a which a feminine noun requires 5 A few recent examples exist of scientists beginning to use the grammatically correct name Pelamis platura e g Bohme 2003 and the Reptile Database with its page headed Pelamis platura Linnaeus 1766 which includes an extensive synonymy of the different scientific names which have been used for the yellow bellied sea snake 6 The same rules apply for the most recent taxonomic name of Hydrophis platurus To further complicate the nomenclature the taxonomic status of sea snakes is still under review with recent authors suggesting a dismantling of monotypic genera such as Pelamis in favour of a single genus Hydrophis in order to reduce paraphyly and better reflect phylogenetic relationships 7 Other common names are yellowbelly sea snake or pelagic sea snake citation needed Evolution edit Sea snakes are a monophyletic group Hydrophiinae that diverged from the front fanged Australasian venomous snakes Elapidae about 10 million years ago 8 9 The yellow bellied sea snake is a part of the rapidly radiating Hydrophis group 10 Description edit nbsp Hydrophis platurus a front fanged venomous snake related to the brown snakes cobras and taipans Elapidae The yellow bellied sea snake as the name implies has a distinctive bicolor pattern with a yellow underbelly and brown back making it easily distinguishable from other sea snake species Yellow bellied sea snakes like many other species of sea snake are fully adapted to living their whole lives at sea mating eating and giving birth to live young ovoviviparous Adaptations to aquatic life include the reduced ventral scale size laterally compressed body and paddle tail for swimming 11 12 valved nostrils and palatine seal for excluding seawater and cutaneous gas exchange for prolonging dive times 12 13 14 This species can uptake up to 33 of its oxygen requirements through the skin while diving and swimming at the surface of the water 15 Sea snakes also have a special salt gland located in the lower jaw that was formerly believed to filter out salt from the surrounding seawater 16 but has been found not to be used for that purpose as sea snakes drink fresh water only 17 See snake scales for terminology used here Morphology edit The body of this snake is compressed with the posterior less than half the diameter of the neck the body scales are juxtaposed subquadrangular in shape and in 23 47 rows around the thickest part of the body ventral scales 264 406 in number are very small and if distinct divided by a latitudinal groove but usually are indistinguishable from adjacent body scales The head is narrow with an elongated snout head shields are entire nostrils are superior and nasal shields are in contact with one another the prefrontal scale is in contact with second upper labial one or two preoculars two or three postoculars and two or three small anterior temporals are present seven or eight upper labials are found with four or five below the eye but separated from the border by a subocular Colors of the snake are variable but most often distinctly bicolored black above yellow or brown below with the dorsal and ventral colors sharply demarcated from one another ventrally there may be a series of black spots or bars on the yellow or brown background or the yellow may extend dorsally so there is only a narrow middorsal black stripe or a series of black crossbars 18 Total length for males is up to 720 mm 28 in for females up to 880 mm 35 in tail length for males is up to 80 mm 3 1 in females up to 90 mm 3 5 in Distribution and habitat edit nbsp Hydrophis platurus xanthos The yellow bellied sea snake is one of the most widely distributed snakes in the world 19 It is completely pelagic and is often observed on oceanic drift lines using surface currents and storms to move around the ocean 20 Their distribution appears to be largely determined by favourable water temperatures oceanic currents and recent formation of land bridges that have blocked farther dispersal The yellow bellied sea snake has an extensive distribution covering the entire tropical Indo Pacific as well as extending to Costa Rica southern California and northern Peru 21 22 It is the only sea snake to have reached the Hawaiian Islands 23 The favoured habitat for hunting and reproduction includes free floating mats of sea kelp occurring in the Indian Ocean The species is the most commonly beached sea snake on the coast of Southwest Australia including records at beaches near metropolitan areas 24 It is also reported from Christmas Island and Cocos Keeling Islands Australia 25 The yellow bellied sea snake requires a minimum of 16 18 C 60 8 to 64 4 F to survive long term 26 However the species has been reported in colder waters of the Pacific such as the coasts of southern California Mexico Tasmania and New Zealand 27 the latter being a country that would otherwise be free of snakes were it not for the infrequent strandings of yellow bellied sea snakes and banded sea kraits 28 Nonetheless these wayward individuals make the yellow bellied sea snake the most commonly seen snake and sea snake in New Zealand to the degree that the species is considered endemic indigenous to New Zealand and worthy of protection under the Wildlife Act 1953 29 These colder water occurrences are believed to be linked to El Nino among other severe weather events possibly creating unusually strong new ocean currents that transport the snakes far off course 30 31 32 In October 2015 beached yellow bellied sea snakes were reported and photographed on beaches in Ventura County California well outside their normal range for the first time in 30 years 30 A few months later in January 2016 a stranded individual was found in Coronado California washed up on Coronado Beach s north end better known as Dog Beach just south of Naval Air Station North Island NASNI The specimen was subsequently transported to and examined at the Scripps Institute of Oceanography La Jolla 33 The yellow bellied sea snake is the only sea snake to have been found in the Atlantic Ocean although only in limited circumstances The yellow bellied sea snake s occurrence into the Atlantic is not considered a part of its native range but rather a dispersal from its native Pacific range 34 The yellow bellied sea snake has been found in all the countries of Africa s eastern coast and all eastern islands like Djibouti Eritrea Kenya Madagascar Mauritius Mayotte Mozambique Reunion Seychelles Somalia South Africa and Tanzania 25 On the African Atlantic coast they have been reported to occur in the Benguela Current with specimens found along the coasts of South Africa and Namibia 35 36 The yellow bellied sea snake has also been found in the Colombian Caribbean four separate times making it the only sea snake to be found in the Caribbean Sea However these occurrences are believed to be the result of human activity be it ship discharge intentional release or via the Panama Canal as it is not considered a part of their native range This is due to the land bridge between North and South America Isthmus of Panama which formed from about 10 million years ago to 3 million years ago 37 i e continental drift acting as a dispersal barrier and preventing entry into the Caribbean Sea from the Pacific Ocean The man made Panama Canal has not made a crossing of the isthmus possible presumably because it is fresh water 38 Due to the wide distribution of the species and relative lack of dispersal barriers it has been assumed that individuals from different localities represent a single breeding population i e high gene flow However a study that used haplotype networks in two populations from Costa Rica suggests that shallow genetic population structure exists which reflects variation in colour patterns brown and yellow in Golfo de Papagayo and completely yellow in Golfo Dulce 39 Behaviour editContrary to past beliefs sea snakes require fresh water to survive and the yellow bellied sea snake drinks precipitation that forms on the surface of sea water 40 This species has been reported to survive severe dehydration of up to 7 months during seasonal drought 41 Yellow bellied sea snakes breed in warm waters they are ovoviviparous with a gestation period around 6 months According to Ditmars females bear live young in tidal pools 42 They move poorly on land due to their smaller belly scales that form a ventral keel 13 They are sometimes observed in large aggregations of thousands on the surface of the water in oceanic drift lines which has been proposed as a strategy to catch prey 43 They hunt by floating on the surface of the water to attract pelagic fish that are seeking shelter prey are captured via a backwards swimming motion and rapid lunge of the jaws 20 The ability to swim backwards is an unusual and distinguishing characteristic of this species 24 Heatwole proposed that these snakes find their prey by sensing the vibration generated by fish movement 44 Venom editThe venom of this species is highly potent like that of other sea snakes 45 Bites are rare and the most common victims are fishermen who try to get them out of fishing nets 46 The subcutaneous LD50 of the venom is 0 067 mg kg and the venom yield per bite is 1 0 4 0 mg 47 48 Yellow bellied sea snake venom contains several different neurotoxins and two other isotoxins 49 Antivenom edit Sea snake venom can cause damage to skeletal muscle with consequent myoglobinuria neuromuscular paralysis or direct renal damage The venoms of significant species of sea snake are neutralised with Commonwealth Serum Laboratories Ltd of Melbourne Australia sea snake Enhydrina schistosa antivenom 50 51 If that preparation is not available tiger snake or polyvalent antivenom should be used No deaths have been recorded from bites in Australian waters 52 53 The E schistosa antivenom was tested specifically on Pelamus platurus and it effectively neutralised the venom 54 Cited references edit Guinea M Lukoschek V Cogger H Rasmussen A Murphy J Lane A Sanders K Lobo A Gatus J Limpus C Milton D Courtney T Read M Fletcher E Marsh D White M D Heatwole H Alcala A Voris H Karns D 2017 Hydrophis platurus IUCN Red List of Threatened Species 2017 e T176738A115883818 doi 10 2305 IUCN UK 2017 2 RLTS T176738A115883818 en Retrieved 12 November 2021 a href Template Cite journal html title Template Cite journal cite journal a CS1 maint multiple names authors list link Guinea M Lukoschek V Cogger H Rasmussen A Murphy J Lane A Sanders K Lobo A Gatus J Limpus C Milton D Courtney T Read M Fletcher E Marsh D White M D Heatwole H Alcala A Voris H Karns D 2017 Hydrophis platurus IUCN Red List of Threatened Species 2010 e T176738A115883818 volume date mismatch Boulenger G A 1896 Catalogue of the Snakes in the British Museum Natural History Volume III Containing the Colubridae Opisthoglyphae and Proteroglyphae Trustees of the British Museum Natural History London pp 266 268 The Reptile Database www reptile database org Lanza B Boscherini S 2000 The gender of the genera Podarcis Wagler 1830 Lacertidae Pelamis Daudin 1803 Hydrophiidae and Uropeltis Cuvier 1829 Uropeltidae Tropical Zoology 13 2 327 329 doi 10 1080 03946975 2000 10531139 Pelamis platura at the Reptarium cz Reptile Database Accessed May 2008 Rasmussen Arne Redsted Sanders Kate Laura Guinea Michael L Amey Andrew P 2014 01 01 Sea snakes in Australian waters Serpentes subfamilies Hydrophiinae and Laticaudinae a review with an updated identification key Zootaxa 3869 4 351 371 doi 10 11646 zootaxa 3869 4 1 ISSN 1175 5334 PMID 25283923 S2CID 207552237 Lukoschek Vimoksalehi Keogh J Scott 2006 11 01 Molecular phylogeny of sea snakes reveals a rapidly diverged adaptive radiation Biological Journal of the Linnean Society 89 3 523 539 doi 10 1111 j 1095 8312 2006 00691 x hdl 1885 20734 ISSN 1095 8312 Pyron R Alexander Burbrink Frank T Colli Guarino R de Oca Adrian Nieto Montes Vitt Laurie J Kuczynski Caitlin A Wiens John J 2011 02 01 The phylogeny of advanced snakes Colubroidea with discovery of a new subfamily and comparison of support methods for likelihood trees Molecular Phylogenetics and Evolution 58 2 329 342 doi 10 1016 j ympev 2010 11 006 ISSN 1095 9513 PMID 21074626 Sanders Kate L Lee Michael S Y Mumpuni Bertozzi Terry Rasmussen Arne R 2013 03 01 Multilocus phylogeny and recent rapid radiation of the viviparous sea snakes Elapidae Hydrophiinae Molecular Phylogenetics and Evolution 66 3 575 591 doi 10 1016 j ympev 2012 09 021 PMID 23026811 Sanders Kate L Rasmussen Arne R Elmberg Johan 2012 08 01 Independent Innovation in the Evolution of Paddle Shaped Tails in Viviparous Sea Snakes Elapidae Hydrophiinae Integrative and Comparative Biology 52 2 311 320 doi 10 1093 icb ics066 ISSN 1540 7063 PMID 22634358 a b Aubret F Shine R 2008 04 01 The origin of evolutionary innovations locomotor consequences of tail shape in aquatic snakes Functional Ecology 22 2 317 322 doi 10 1111 j 1365 2435 2007 01359 x ISSN 1365 2435 a b Brischoux Francois Shine Richard 2011 05 01 Morphological adaptations to marine life in snakes Journal of Morphology 272 5 566 572 doi 10 1002 jmor 10933 ISSN 1097 4687 PMID 21337377 S2CID 26527627 Seymour Roger S 1974 08 09 How sea snakes may avoid the bends Nature 250 5466 489 490 Bibcode 1974Natur 250 489S doi 10 1038 250489a0 PMID 4469599 S2CID 4162151 Graham J B 1974 07 01 Aquatic respiration in the sea snake Pelamis platurus Respiration Physiology 21 1 1 7 doi 10 1016 0034 5687 74 90002 4 ISSN 0034 5687 PMID 4846936 Dunson William A Packer Randall K Dunson Margaret K 1971 01 01 Sea Snakes An Unusual Salt Gland under the Tongue Science 173 3995 437 441 Bibcode 1971Sci 173 437D doi 10 1126 science 173 3995 437 JSTOR 1732639 PMID 17770448 S2CID 41474438 The Sad Tale of the Thirsty Dehydrated Sea Snake Phenomena 18 March 2014 Archived from the original on March 19 2014 M A Smith 1943 476 477 gives more complete descriptions of the color pattern variants Rasmussen Arne Redsted Murphy John C Ompi Medy Gibbons J Whitfield Uetz Peter 2011 Marine Reptiles PLOS ONE 6 11 e27373 Bibcode 2011PLoSO 627373R doi 10 1371 journal pone 0027373 PMC 3210815 PMID 22087300 a b Heatwole Harold 1993 Fauna of Australia Family Hydrophiinae Canberra AGPS p 15 Quinones Javier Burneo Karla Garcia Barragan Claudio 2014 12 09 Rediscovery of the Yellow bellied Sea Snake Hydrophis platurus Linnaeus 1766 in Mancora northern Peru Check List 10 6 1563 1564 doi 10 15560 10 6 1563 Palermo Elizabeth December 28 2015 Venomous Sea Snake Washes Up on California Beach Surprising Scientists Scientific American Retrieved 2016 03 30 Liptow J 1999 Pelamis platura Animal Diversity Web University of Michigan Retrieved 17 December 2022 a b Browne Cooper R Bush B Maryan B Robinson D 2007 Reptiles and frogs in the bush southwestern Australia University of Western Australia Press p 273 ISBN 9781920694746 a b Guinea M 15 February 2009 IUCN Red List of Threatened Species Hydrophis platurus IUCN Red List of Threatened Species Dunson and Ehlert 1971 Swimmers told not to be surprised of poisonous sea snake Waikato Times Hamilton New Zealand Fairfax New Zealand 4 January 2012 Retrieved 26 April 2012 Natural History Information Centre Natural History Questions Auckland New Zealand Auckland War Memorial Museum Q Are there any snakes in New Zealand Archived from the original on 29 November 2014 Retrieved 26 April 2012 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 JSTOR 43264621 Wikidata Q58629017 a b Blame El Nino for poisonous sea snake found on Ventura County beach Los Angeles Times 17 October 2015 Retrieved 2015 10 25 Yellow bellied Sea Snake Australian Museum australianmuseum net au Retrieved 2016 03 30 El Nino brings sea snake to California s coast CNN 17 October 2015 Retrieved 2015 10 25 Yellow bellied Sea Snake from Coronado Beach Coronado San Diego California iNaturalist 12 January 2016 Harvey B Lillywhite Coleman M Sheehy Harold Heatwole Francois Brischoux David W Steadman Why Are There No Sea Snakes in the Atlantic BioScience Volume 68 Issue 1 1 January 2018 Pages 15 24 https doi org 10 1093 biosci bix132 Sexton Owen J 1967 01 01 Population Changes in a Tropical Lizard Anolis limifrons on Barro Colorado Island Panama Canal Zone Copeia 1967 1 219 222 doi 10 2307 1442198 JSTOR 1442198 Also see references in The Living Shores of Southern Africa Margo and George Branch pp 130 131 Macmillan South Africa Publishers Johannesburg and Snake versus Man Johan Marais pp 50 51 C Struik Publishers Cape Town North and South America Came Together Much Earlier Than Thought Study NBC News Retrieved 2016 03 30 Hernandez Camacho J I amp Alvarez Leon Ricardo amp Renjifo Rey J M 2006 Pelagic sea snake Pelamis platurus Linnaeus 1766 Reptilia Serpentes Hydrophiidae is found on the Caribbean Coast of Colombia Mem Fund La Salle Cien Nat 164 143 152 Sheehy Coleman M Solorzano Alejandro Pfaller Joseph B Lillywhite Harvey B 2012 08 01 Preliminary insights into the phylogeography of the yellow bellied sea snake Pelamis platurus Integrative and Comparative Biology 52 2 321 330 doi 10 1093 icb ics088 ISSN 1557 7023 PMID 22659201 Lillywhite Harvey B Brischoux Francois Sheehy Coleman M Pfaller Joseph B 2012 08 01 Dehydration and drinking responses in a pelagic sea snake Integrative and Comparative Biology 52 2 227 234 doi 10 1093 icb ics039 ISSN 1557 7023 PMID 22510231 Lillywhite Harvey B Sheehy Coleman M Brischoux Francois Grech Alana 2014 05 07 Pelagic sea snakes dehydrate at sea Proceedings of the Royal Society of London B Biological Sciences 281 1782 20140119 doi 10 1098 rspb 2014 0119 ISSN 0962 8452 PMC 3973276 PMID 24648228 Schmidt K P amp D D Davis 1941 Field Book of Snakes of the United States and Canada G P Putnam s Sons New York p 280 Brischoux Francois Lillywhite Harvey B 2011 06 14 Light and flotsam dependent float and wait foraging by pelagic sea snakes Pelamis platurus Marine Biology 158 10 2343 2347 doi 10 1007 s00227 011 1738 z ISSN 0025 3162 S2CID 86115673 Heatwole Harold 1999 01 01 Sea Snakes UNSW Press ISBN 9780868407760 SnakeBiteTemplate3 pmd PDF Canas Carlos A Castano Valencia Santiago Castro Herrera Fernando September 2022 Biological and medical aspects related to the yellow bellied sea snake Hydrophis platurus Linnaeus 1766 A view from Colombia Travel Medicine and Infectious Disease 49 102410 doi 10 1016 j tmaid 2022 102410 ISSN 1477 8939 LD50 value of venomous snakes Archived 2012 02 01 at the Wayback Machine 1 LD stands for Lethal dose Mori Nobuhiro amp Ishizaki Hiroyuki amp Tu Anthony 1989 Isolation and Characterization of Pelamis platurus Yellow bellied Sea Snake Postsynaptic Isoneurotoxin The Journal of Pharmacy and Pharmacology 41 331 4 10 1111 j 2042 7158 1989 tb06466 x P Gopalakrishnakone 1994 Sea Snake Toxinology NUS Press pp 27 ISBN 978 9971 69 193 6 Hawgood B J 1 March 1998 Hugh Alistair Reid OBE MD investigation and treatment of snake bite Toxicon 36 3 431 446 doi 10 1016 s0041 0101 97 00082 2 PMID 9637363 https www flyingdoctor net IgnitionSuite uploads docs snakebite pdf Management of snake bites in Australia and Papua New Guinea Accessed May 2008 http www emedicine com emerg topic543 htm Accessed May 2008 http www ajtmh org cgi content abstract 23 1 135 Published 1973 Accessed May 2008 Other sources editDitmars R L 1936 The Reptiles of North America Doubleday Doran amp Co New York 476 pp Hecht M K Kropach C Hecht B M 1974 Distribution of the yellow bellied sea snake Pelamis platurus and its significance in relation to the fossil record Herpetologica 30 387 395 Kropach C 1975 The yellow bellied sea snake Pelamis in the eastern Pacific pp 185 213 in Dunson W ed The Biology of Sea Snakes Univ Park Press Baltimore xi 530 pp Smith M A 1943 The Fauna of British India Ceylon and Burma including the Whole of the Indo Chinese Sub region Reptiles and Amphibians Vol III Serpentes Taylor amp Francis London 583 pp External links editPelagic Sea Snakes and the animals that live on them Life is Short but Snakes are Long Retrieved from https en wikipedia org w index php title Yellow bellied sea snake amp oldid 1218971116, wikipedia, wiki, book, books, library,

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