Posts Tagged ‘Tortoise’

Vietnam’s Turtles

Posted by in Animal Origins & Fun Facts,community-based conservation

Vietnam is considered one of the most important hotspots for turtle diversity in Asia with 25 different native species of tortoise and freshwater turtles including five soft-shell species and 20 other hard-shell turtle species. Vietnam also is home to at least two endemic species of turtles that are found nowhere else in the world, as well as the legendary Hoan Kiem turtle, Rafetus swinhoei, one of the most famous and rarest turtles in the world.

All of Vietnam’s turtles are threatened by hunting and trade to meet the insatiable demand mainly from consumers in China, where turtles are consumed in special dishes or used to make traditional medicine. Evidence suggests that wild populations of most turtle species in Vietnam have declined significantly over the past 15 years leaving fragmented and degraded populations surviving in the wild.

Education for Nature Vietnam’s Wildlife Crime Unit has documented 434 cases involving illegal hunting, smuggling, or trade of tortoises and freshwater turtles since 2005. These figures include 163 smuggling cases accounting for more than an estimated 25 tons of turtles or up to 30,000 individuals.

Given that only a small fraction of trade is believed to be apprehended, this would suggest that the quantity of turtles being smuggled to China is significantly higher.

In March 2010, Cuc Phuong National Park opened the doors to the region’s first visitor interpretation center focused exclusively on the conservation and protection of tortoises and freshwater turtles. Located on the grounds of the park’s Turtle Conservation Center (TCC), the new educational facilities incorporate a range of interpretive displays and exhibits including underwater viewing tanks, a turtle egg incubation and hatchling room, and a mock hunting camp  and forest trail. The Houston Zoo is proud to support the development of this new effort. To read the full press release – click here Turtle Conservation CenterVietnam

Galapagos Tortoise

Posted by in Animal Origins & Fun Facts,Endangered Species,Featured

PC060075In November 2009, a group of veterinarians including the Houston Zoo’s Director of Veterinary Services Dr. Joseph Flanagan, working with the Galapagos National Park (GNP), prepared 39 hybrid tortoises slated to be the pioneer group to initiate the return of tortoises to Pinta Island.  Project Pinta is a multi-year project aimed at the restoration of the island following the successful eradication of goats on Pinta in 2003.  While complete island restoration will require the eventual repopulation of Pinta with a reproductive tortoise population, scientists and managers are awaiting the final results from genetic analyses of a massive sampling of tortoises before making the final selection of which tortoises to use.  To initiate the return of tortoises, critical ecosystem engineers during this important period of vegetative recovery, a special group of tortoises will be released onto Pinta.  To ensure that this group of hybrid tortoises will not compromise any future efforts to reestablish a reproductive population, veterinarians sterilized them.   

Research on giant tortoises in Galapagos during the last 40 years has demonstrated many ways in which tortoises play a major role in Galapagos ecosystems.  Given their size, movement patterns, and use of resting forms (hollowed-out beds created by tortoises for resting), tortoises can affect both the pattern and structure of vegetation.  In addition, grazing by tortoises can help maintain open areas within forests.  Studies of the Galapagos tomato and other plant species have shown a marked increase in germination rates following passage through the gut of tortoises.  Besides scarification of seeds, tortoise scat can provide a rich substrate for germination and growth.  Studies have shown that seeds consumed by tortoises may take from a few days to weeks to be deposited, allowing for seed dispersal over distances of several kilometers.  Probably more than any other native species in Galapagos, tortoises have a major impact on the structure and composition of their environment.   

Tortoises are needed back on Pinta.  With the eradication of goats in 2003, vegetation grew back quickly but without tortoises to engineer the recovery.  Shade-loving plant species are becoming more and more abundant, reducing the available habitat for native and endemic sun-loving species.  Pinta needs a natural habitat engineer, the giant tortoise, to ensure a balanced recovery and to fully restore the island to its near pristine condition.  

While awaiting the final results of the genetic survey, conservation managers took steps to initiate the return of tortoises to Pinta through the use of sterilized adult hybrid tortoises currently held in captivity.  This is considered the best short-term solution to initiate a more balanced recovery. 

Watch our http://www.houstonzoo.org/conservation website in the coming week for more detalis on this project.