View source for Biology:Caribbean monk seal

{{Short description|Extinct species of seal native to the Caribbean}}
{{speciesbox
| name = Caribbean monk seal
| image = Cms-newyorkzoologicalsociety1910.jpg
| image_upright = 1.1
| image_caption = Specimen in the New York Aquarium, {{circa}} 1910
| status = EX
| status_system = IUCN3.1
| extinct = 1952
| status_ref = <ref name="iucn status 18 November 2021">{{cite iucn |author=Lowry, L. |date=2015 |title=''Neomonachus tropicalis'' |volume=2015 |page=e.T13655A45228171 |doi=10.2305/IUCN.UK.2015-2.RLTS.T13655A45228171.en |access-date=18 November 2021}}</ref>
| status2 = GX
| status2_system = TNC
| status2_ref = <ref>{{cite web |title=NatureServe Explorer 2.0 |url=https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.106297/Neomonachus_tropicalis |website=explorer.natureserve.org |access-date=29 March 2022}}</ref>
| genus = Neomonachus
| species = tropicalis
| authority = (Gray, 1850)
| synonyms =
''Monachus tropicalis'' <small>(Gray, 1850)</small><ref name="iucn status 18 November 2021" /><br />
''Phoca tropicalis'' <small>Gray, 1850<ref name="iucn status 18 November 2021" /></small>
}}

The '''Caribbean monk seal''' ('''''Neomonachus tropicalis'''''), also known as the '''West Indian seal''' or '''sea wolf''', was a [[Biology:Species|species]] of [[Biology:Pinniped|seal]] native to the Caribbean which is now believed to be extinct. The main natural predators of Caribbean monk seals were large [[Biology:Shark|shark]]s, such as [[Biology:Great white shark|great whites]] and [[Biology:Tiger shark|tiger shark]]s, and possibly transient [[Biology:Orca|orca]]s (though killer whales are not often sighted in the Caribbean); however, humans would become their most lethal enemy.<ref name="King" />  Overhunting of the monk seals for oil and meat, as well as overfishing of their natural prey, are the likely reasons for the seals' extinction.<ref name="King" /> 

The last confirmed sighting of a Caribbean monk seal was in 1952, at Serranilla Bank, in the waters west of Jamaica and off the eastern coast of Nicaragua.<ref name="Rice" /> In 2008, the species was officially declared extinct by the United States, after an exhaustive five-year search. This analysis was conducted by the National Marine Fisheries Service of the [[Organization:National Oceanic and Atmospheric Administration|National Oceanic and Atmospheric Administration]] (NOAA).<ref>{{cite journal|author1=Kyle Baker|author2=Jason Baker|author3=Larry Hanse|author4=Gordon T. Waring|title=Endangered Species Act 5-Year Review Caribbean Monk Seal (''Monachus tropicalis'')|journal=National Oceanic and Atmospheric Administration National Marine Fisheries Service|date=March 2008}}</ref> The Caribbean monk seal is closely related to the critically endangered [[Biology:Hawaiian monk seal|Hawaiian monk seal]], a species which is restricted to the central [[Earth:Pacific Ocean|Pacific Ocean]] surrounding the [[Earth:Hawaiian Islands|Hawaiian Islands]], and the [[Biology:Mediterranean monk seal|Mediterranean monk seal]], another endangered species, predominantly found in the waters off of Greece.<ref>{{Cite web|url=https://www.fisheries.noaa.gov/feature-story/whats-latest-hawaiian-monk-seals|title=What's the Latest on Hawaiian Monk Seals? &#124; NOAA Fisheries|first=NOAA|last=Fisheries|date=March 8, 2018|website=NOAA}}</ref><ref>{{Cite web |url=http://www.mom.gr/displayITM1.asp?ITMID=31# |title=MOm Website |access-date=2011-12-11 |archive-url=https://web.archive.org/web/20120316102405/http://www.mom.gr/displayITM1.asp?ITMID=31# |archive-date=2012-03-16 |url-status=dead }}</ref>

==Description==
[[Image:Monachus tropicalis.jpg|thumb|left|Drawing of ''Neomonachus tropicalis'']]
Caribbean monk seals had a relatively large, long, robust body, could grow to nearly {{convert|8|ft|order=flip}} in length and weighed {{convert|375|to|600|lb|-1|order=flip}}. Males were probably slightly larger than females, which is similar to Mediterranean monk seals. Like other monk seals, this species had a distinctive head and face. The head was rounded with an extended broad muzzle. The face had relatively large wide-spaced eyes, upward opening nostrils, and fairly big whisker pads with long light-colored and smooth whiskers. When compared to the body, the animal's foreflippers were relatively short with little claws and the hindflippers were slender. Their coloration was brownish and/or grayish, with the underside lighter than the dorsal area. Adults were darker than the more paler and yellowish younger seals. Caribbean monk seals were also known to have algae growing on their pelage, giving them a slightly greenish appearance, which is similar to Hawaiian monk seals.<ref name=NOAA>{{cite web|title=Caribbean Monk Seal (''Monachus tropicalis'')|url=http://www.nmfs.noaa.gov/pr/species/mammals/pinnipeds/caribbeanmonkseal.htm|publisher=NOAA|access-date=13 December 2011}}</ref>

==Behavior and ecology==
Historical records suggest that this species may have "hauled out" at resting areas on land in large social groups, typically 20–40 animals, but sometimes up to 100 individuals, throughout its range.<ref name=Jefferson>{{cite book|last=Jefferson|first=Webber|title=Marine Mammals of the World, A Comprehensive Guide to their Identification|year=2008|publisher=Elsevier|location=Amsterdam|pages=470–471}}</ref>  The groups may have been organised based on age and life stage differences. Their diet most likely consisted of fish and crustaceans.

Like other true seals, the Caribbean monk seal was sluggish on land. Its lack of fear of humans, and an unaggressive, curious nature was taken advantage of by human hunters.

===Reproduction and longevity===
[[File:Caribbean monk seals New York.jpg|thumb|Two young individuals in New York Aquarium, 1910]]
Caribbean monk seals had a long pupping season, which is typical for pinnipeds living in subtropical and tropical habitats. In Mexico, breeding season peaked in early December. Like other monk seals, this species had four retractable nipples for suckling their young. Newborn pups were probably about {{convert|1|m}} in length and weighed {{convert|16|to|18|kg}} and reportedly had a sleek, black lanugo coat when born.<ref name=Jefferson />  It is believed this animal's average lifespan was approximately twenty years.

The Caribbean monk seal nasal mite (''Halarachne americana''), was entirely dependent on the seal, living inside of its nasal cavity, and went extinct with it.

==Habitat==
Caribbean monk seals were found in warm temperate, subtropical and tropical waters of the Caribbean Sea, Gulf of Mexico, and the western Atlantic Ocean. They probably preferred to haul out at low sandy beaches above high tide on isolated and secluded [[Earth:Atoll|atoll]]s and islands, but occasionally would visit the mainland coasts and deeper waters offshore. This species may have fed in shallow [[Earth:Lagoon|lagoon]]s and [[Earth:Reef|reef]]s.<ref name=NOAA />

==Relationship with humans==
[[File:Monachus tropicalis.gif|thumb|left|Depiction by Henry W. Elliott from 1884]]
The first historical mention of the Caribbean monk seal is recorded in the account of the second voyage of Christopher Columbus.  In August 1494, a ship laid anchor off the mostly barren island of Alta Velo, south of Hispaniola, where the party of men aboard killed eight seals that were resting on the beach.<ref name=Kerr>{{cite book|last=Kerr|first=R|title=A General History and Collection of Voyages and Travels|year=1824|location=London and Edinburgh|page=vii}}</ref> The second recorded interaction with Caribbean monk seals was Juan Ponce de León's discovery of the Dry Tortugas Islands.  On June 21, 1513, when Ponce de León discovered the islands, he ordered a foraging party to go ashore, where the men killed fourteen of the docile seals.<ref name=Moore>{{cite book|last=Moore|first=J|title=Distribution of Marine Mammals to Florida waters|year=1953|pages=117–158|chapter=49}}</ref>  There are several more records throughout the colonial period of seals being discovered and hunted at Guadeloupe, the [[Earth:Scorpion Reef|Alacrane Islands]], Bahamas, Pedro Cays, and Cuba.<ref name=King>{{cite journal |last=King |first=J. |title=The monk seals (genus Monachus) |journal=Bull. Br. Mus. (Nat. Hist.) Zool.|date=1956 |volume=3 |pages=201–256 |issn=0007-1498|doi=10.5962/bhl.part.4123 |url=https://www.biodiversitylibrary.org/part/4123 }}</ref>  As early as 1688, sugar plantation owners sent out hunting parties to kill hundreds of seals every night in order to obtain oil to lubricate the plantation machinery.<ref name=Gray>{{cite book|last=Gray|first=J|title=Catalogue of the Specimens of Mammalia in the Collection of the British Museum|url=https://archive.org/details/cataloguemammalia03britrich|year=1850|location=London|page=v}}</ref>  A 1707 account describes fisherman slaughtering seals by the hundreds for oil to fuel their lamps.<ref name=King /> By 1850, so many seals had been killed that there were no longer sufficient numbers for them to be commercially hunted.<ref name=Gray />

In the late 19th and early 20th centuries, scientific expeditions to the Caribbean encountered the Caribbean monk seal. In December 1886, the first recorded scientific expedition to research seals, led by H. A. Ward and Professor F. Ferrari Perez as part of the Mexican Geographical and Exploring Survey, ventured to a small collection of reefs and a small cay known as the Triangles (20.95° N 92.23° W) in search of  monk seals.<ref name=Ward>{{cite journal|last=Ward|first=H|title=The West Indian Seal (''Monachus tropicalis'')|journal=Nature|year=1887|volume=35|issue=904|pages=392|doi=10.1038/035392a0|url=https://zenodo.org/record/1429301|bibcode=1887Natur..35..392W|s2cid=4065385}}</ref>  Although the research expedition was in the area for only four days, forty-two specimens were killed and taken away; the two leaders of the expedition sent to museums around the Western world.<ref name=Ward /> Two specimens from the encounter survive intact at the British Museum of Natural History, and the Cambridge Zoological Museum, respectively.<ref name=King /> The expedition also captured a newly born seal pup that died in captivity a week later.<ref name=Ward />

The first Caribbean monk seal to live in captivity for an extended period was a female seal that lived in the New York Aquarium.<ref name=Anon>{{cite book|last=Anon|title=The West Indian Seal|year=1903|location=New York}}</ref>  The seal was captured in 1897 and died in 1903, living in captivity for a total of five and a half years.<ref name=Anon />  In 1909, the New York Aquarium acquired four Caribbean monk seals, three of which were yearlings (between one and two years old) and the other a mature male.<ref>{{cite journal|last=Townsend|first=C|title=The West Indian Seal at the Aquarium|journal=Science|year=1909|volume=30|pages=212|doi=10.1126/science.30.763.212|issue=763|pmid=17836790|url=https://zenodo.org/record/1448020}}</ref>

===Extinction===
Through the first half of the 20th century, Caribbean monk seal sightings became much rarer. In 1908, a small group of seals was seen at the once bustling Tortugas Islands.<ref name=Moore /> Fishermen captured six seals in 1915, which were sent to Pensacola, Florida, and eventually released.<ref name=Allen>{{cite book|last=Allen|first=G|title=Extinct and vanishing Mammals of the Western Hemisphere.|url=https://archive.org/details/extinctvanishing00allerich|year=1942|publisher=American Committee for International Wild Life Protection}}</ref>  A seal was killed near Key West, Florida in March 1922.<ref name=Townsend2>{{cite book|last=Townsend|first=C|title=The West Indian Seal|year=1923|pages=55}}</ref>  There were sightings of Caribbean monk seals on the Texas coast in 1926 and 1932.<ref>{{cite journal|doi=10.2307/1375180|jstor=1375180|title=General Notes|journal=Journal of Mammalogy|volume=28|issue=3|pages=289–299|last1=Gunter|first1=Gordon|last2=Leedy|first2=Daniel L.|last3=McMurry|first3=Frank B.|last4=Schantz|first4=Viola S.|last5=Mickey|first5=Arthur B.|last6=Steele|first6=Charles N.|last7=Bishop|first7=Sherman C.|last8=Peterson|first8=Randolph L.|last9=Engels|first9=William L.|last10=Jaeger|first10=Edmund C.|last11=Angulo|first11=Juan J.|last12=Doetschman|first12=Willis H.|year=1947}}</ref>  The last seal recorded to be killed by humans was killed on the Pedro Cays in 1939.<ref name=Lewis>{{cite journal|last=Lewis|first=C|title=The West Indian Seal|journal=Natural History Notes of the Natural History Society of Jamaica|year=1948|volume=34|pages=169–171}}</ref>  Two more seals were seen on Drunken Mans Cay, just south of Kingston, Jamaica, in November 1949.<ref name=King /> In 1952 the Caribbean monk seal was confirmed sighted for the last time at Serranilla Bank.<ref name=Rice>{{cite book|last=Rice|first=D|title=Caribbean monk seal (''Monachus tropicalis''). In Seals. Proceedings of working meeting of seal specialists on threatened and depleted seals of the world, held under the auspices of the Survival Service Commission of the IUCN, 18–19 August|year=1973|publisher=Univ. Guelph, IUCN Publ, Suppl. paper|location=Ontario, Canada. Morges, Switzerland}}</ref>

The final extinction of the Caribbean monk seal was triggered by two main factors. The most visible factor contributing to the Caribbean monk seals' demise was the nonstop hunting and killing of the seals in the 18th and 19th centuries to obtain the oil held within their blubber.<ref name=Adam>{{cite journal|last=Adam|first=Peter|title=''Monachus tropicali''|journal=Mammalian Species|date=July 2004|doi=10.1644/747|volume=747|pages=1–9|doi-access=free}}</ref> The insatiable demand for seal products in the Caribbean encouraged hunters to slaughter the Caribbean monk seals by the hundreds.<ref>{{cite journal|last=Sloane|first=H|title=A voyage to the islands Madera, Barbados, Nieves, S. Christophers and Jamaica, with the natural history of the herbs and trees, four-footed beasts, fishes, birds, insects, reptiles, &c. of the last of those islands; to which is prefix'd an introduction, wherein is an account of the inhabitants, air, waters, diseases, trade &c. of that place, with some relations concerning the neighboring continent and islands of America|year=1707|volume=1|issue=1|pages=1–419|location=London}}</ref> The Caribbean monk seals' docile nature and lack of flight instinct in the presence of humans made them very easy to kill.<ref name=Ward /> The second factor was the overfishing of the reefs that sustained the Caribbean monk seal population. With no fish or mollusks to feed on, the seals that were not killed by hunters for oil died of starvation.<ref>{{cite journal |last1=McClenachan |first1=Loren |last2=Cooper |first2=Andrew B. |title=Extinction rate, historical population structure and ecological role of the Caribbean monk seal |journal=Proc. R. Soc. B |year=2008 |volume=275 |pages=1351–1358 |pmc=2602701 |pmid=18348965 |doi=10.1098/rspb.2007.1757 |issue=1641}}</ref>  Surprisingly few conservation measures were taken towards attempting to save the Caribbean monk seal; by the time it was placed on the endangered species list in 1967, it was likely already extinct.<ref name=Adam />

Unconfirmed sightings of Caribbean monk seals by local fishermen and divers are relatively common in Haiti and Jamaica, but two recent scientific expeditions failed to find any sign of the species. It is possible the mammal is still extant, but some biologists strongly believe the sightings are of wandering [[Biology:Hooded seal|hooded seal]]s, which have been positively identified on Caribbean archipelagos such as Puerto Rico and the Virgin Islands.<ref>{{Cite web|url=https://www.monachus-guardian.org/mguard08/08newcar.htm|title=Caribbean Monk Seal News – Monachus Guardian 4 (2): November 2001|website=www.monachus-guardian.org}}</ref><ref>{{Cite web|url=https://apnews.com/aa4eb370d71ba91407c8c54e47bdd68b|title=Wounded Seal Found On Puerto Rican Beach – Thousands of Miles From Home|last=Beard|first=David|date=22 July 1993|website=AP News|archive-url=https://web.archive.org/web/20210514084831/https://apnews.com/article/aa4eb370d71ba91407c8c54e47bdd68b|archive-date=14 May 2021|access-date=5 July 2023}}</ref>

==See also==
* [[Earth:Holocene extinction|Holocene extinction]]
* [[Biology:Hawaiian monk seal|Hawaiian monk seal]]
* [[Biology:Mediterranean monk seal|Mediterranean monk seal]]
* List of extinct animals

==References==
{{Reflist|2}}

==External links==
* [http://animaldiversity.ummz.umich.edu/site/accounts/information/Monachus_tropicalis.html ADW: ''Monachus tropicalis'']
* [https://web.archive.org/web/20110130153132/http://www.foxnews.com/story/0,2933,364241,00.html Feds: Caribbean Monk Seal Officially Extinct] Fox News
* [http://www.nmfs.noaa.gov/pr/species/mammals/pinnipeds/caribbeanmonkseal.htm National Marine Fisheries Service Caribbean monk seal webpage]
* [http://www.monachus-guardian.org/factfiles/carib01.htm Fact files: Caribbean Monk Seal, ''Monachus tropicalis'']
* [https://web.archive.org/web/20070927203541/http://www.petermaas.nl/extinct/speciesinfo/caribbeanmonkseal.htm The Extinction Website – Species Info – ''Monachus tropicalis'']

{{Taxonbar|from=Q600654}}

[[Category:Monachines]]
[[Category:Extinct carnivorans]]
[[Category:Carnivorans of North America]]
[[Category:Carnivorans of South America]]
[[Category:Species made extinct by human activities]]

{{Sourceattribution|Caribbean monk seal}}