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vaquita extinct 2020

and Terms of Use. The vaquita has been listed as critically endangered since 1996. Facebook. The robust calves suggest that inbreeding depression is not harming the health of these last vaquita. [3][4], The vaquita was first described as a species by two zoologists, Kenneth S. Norris and William N. McFarland, in 1958 after studying the morphology of skull specimens found on the beach. "They've survived like this for at least 250,000 years," said Barbara Taylor, research scientist at the Southwest Fisheries Science Center. The coloration is mostly grey with a darker back and a white ventral field. [6] Genome sequencing from an individual captured in 2017 indicates that the ancestral vaquitas had already gone through a major population bottleneck in the past, which may explain why the few remaining individuals are still healthy despite the very low population size. This effort, called VaquitaCPR, captured two vaquitas in 2017: one was later released and the other died shortly after capture after both suffered from shock. [12] By 2007 abundance was estimated to have dropped to 150. Their ancestors are thought to have moved north across the equator more than 2.5 million years ago during a period of cooling in the Pleistocene. part may be reproduced without the written permission. Some vaquitas have individually … By Karen Lapizco. How many individuals are there? [20], Local and international conservation groups, including Museo de Ballena and Sea Shepherd Conservation Society, are working with the Mexican Navy to detect fishing in the Refuge Area and remove illegal gillnets. Your opinions are important to us. The illegal totoaba swim bladder trade is responsible for the decline of the critically endangered vaquita porpoise. Can you be injected with two different vaccines? Share. "The species, even now, is probably perfectly capable of surviving," said Phil Morin, research geneticist at NOAA Fisheries' Southwest Fisheries Science Center and lead author of the new study published this week in Molecular Ecology Resources. [6][8] Females reach a maximum size of about 150 cm (4.9 ft), while males reach about 140 cm (4.6 ft). Losing the porpoise would be a tragedy for Mexico, the World Wildlife Fund said this week ― akin to “losing a piece” of the country, according to Maria Jose Villanueva, a project coordinator for WWF Mexico. The vaquita is a small porpoise found only in the northern Gulf of California (Sea of Cortez) in Mexico. It has a small body with an unusually tall, triangular dorsal fin, a rounded head, and no distinguished beak. One of the world’s most endangered marine animals is a pint-size porpoise known as the vaquita. [4] Today, this is the most endangered marine mammal in the world.[14][4]. At what level is radiation totally safe for our body? This site uses cookies to assist with navigation, analyse your use of our services, and provide content from third parties. By 1996, the IUCN considered the species critically endangered. Vaquita porpoise about to go extinct, researchers warn by Sinikka Tarvainen, Dpa Credit: © Dr Armando Jaramillo-Legorreta The vaquita porpoise, one … It is possible, though, that there no more than 10 vaquitas left. [6] Sexual dimorphism is apparent in body size, with mature females being longer than males and having larger heads and wider flippers. [6], The genus Phocoena comprises four species of porpoise, most of which inhabit coastal waters (the spectacled porpoise is more oceanic). Vaquitas only live in the northern end of Mexico’s Gulf of California. Averaging 150 cm (4.9 ft) (females) or 140 cm (4.6 ft) (males) in length, it is the smallest of all living cetaceans. The world’s smallest porpoise was only discovered in 1958 and a little over half a century later, they are on the brink of extinction. [4], Little is known about the life history of this species. [13] Population abundance as of 2018 was estimated at less than 19 individuals.

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