Wednesday, 12 March 2014

Endangered Species Act Protection Sought for 9 Rare Caribbean Lizards--- Skinks Found Only in Puerto Rico, Virgin Islands Threatened by Introduced Predators, Habitat Destruction - via Herp Digest

Contact: Collette Adkins Giese, (651) 955-3821
Press Release, St. Petersburg, FL. 2/11/14 — The Center for Biological Diversity filed a formal petition today seeking Endangered Species Act protection for nine newly identified species of skinks found only in Puerto Rico and the Virgin Islands. These rare lizards with smooth skins are on the knife’s edge of extinction due to introduced predators and habitat destruction. Reptiles around the globe are in the midst of an extinction crisis with roughly 1 in 5 species considered endangered or at risk of disappearing.
“Time is running out for these lizards,” said Collette Adkins Giese, a Center biologist and lawyer focused on protecting reptiles and amphibians. “The Caribbean is home to extremely rare animals found nowhere else in the world, but too many have already gone extinct. To save these skinks, we need to get them protected under the Endangered Species Act.”
Scientists recently recognized the nine petitioned skinks, along with dozens of others on Caribbean islands. The scientists initiated their study after finding unusually large genetic differences among populations of these skinks on different islands in the Caribbean. All of the newly identified endemic Caribbean skinks are near extinction (or already extinct) due to introduced predators like mongooses and cats, as well as large-scale habitat destruction for development and agriculture.
This loss is alarming because reptiles play important roles as predators and prey in their ecosystems and they’re valuable indicators of environmental health. The animals in today’s petition will reap life-saving benefits from the Endangered Species Act, which has a 99 percent success rate at staving off extinction for species under its care.
“Skinks have a slow-moving curiosity and are not adapted to fast predators such as the mongoose, introduced by humans,” said Dr. Blair Hedges of Pennsylvania State University, the lead author of the 2012 study that recognized the petitioned species. “The survival of these skinks depends on the special measures of protection that only the Endangered Species Act can provide.”
Although reptiles have been around for hundreds of millions of years and survived every major extinction period, now, due largely to human impacts, they’re dying off at up to 10,000 times the historic extinction rate. About 20 percent of reptiles in the world are endangered or vulnerable to extinction. Within the Caribbean, scientists estimate that reptiles have levels of endangerment that are at or near the highest levels worldwide.
The Center was joined in its petition for these nine skinks by Dr. Renata Platenberg, an ecologist specializing in Caribbean reptiles.
The petitioned-for Caribbean skinks, which can grow to be about 8 inches long, are unique among reptiles in having reproductive systems most like humans, including a placenta and live birth. They have cylindrical bodies, and most have ill-defined necks that, together with their sinuous movements and smooth, bronze-colored skin, make them look like stubby snakes.
Four of the species for which we petitioned are found within the territory of Puerto Rico: the Culebra skink (Culebra and the adjacent islet of Culebrita), Mona skink (Mona Island), Monito skink (Monito Island) and Puerto Rican skink (Puerto Rico and several of its satellite islands). The remaining five are found in the Virgin Islands: the Greater St. Croix skink (St. Croix and its satellite Green Cay), Lesser St. Croix skink (St. Croix), Greater Virgin Islands skink (St. John and St. Thomas), Lesser Virgin Islands skinks (St. Thomas and two adjacent islets, several British Virgin Islands) and Virgin Islands bronze skink (St. Thomas and several of its islets, several British Virgin Islands).
Eight of the nine petitioned-for species fall within the genus Spondylurus, and one falls within the genus Capitellum. The genus Spondylurus includes what are now known as the Antillean four-lined skinks because of the four major dark stripes on their back and sides. Skinks in the genus Capitellum are called the Antillean small-headed skinks and have small feet and short heads, lacking dark dorsolateral stripes.

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