Having
evolved some 130 million years ago and outlived even the dinosaurs,
sea turtles today face threats so huge that, without worldwide conservation
efforts, their survival into the next century would be almost impossible.
The greatest threats to sea turtle populations come in the form
of human population pressures, which include:
•Habitat
destruction (both of nesting and feeding sites)
•Pollution
•Accidental drowning in fishing gear
•Unnatural lighting on nesting beaches (causing
disorientation of hatchlings en route to the sea)
•Unsustainable
harvesting of eggs and turtles (for
use as food source, medicinal qualities and ornamental purposes)
Sea turtles are also faced with natural predators throughout their
long life histories. Animals such as raccoons, coatis and foxes
seek out and dig up nests from the beach.
Those
lucky enough to hatch are then faced with the threat of a hungry
bird or crab on their journey to the sea; and once in the sea,
sharks and other fish are just waiting for an easy feed. Research
suggests that on average, only 1 out of every 1000 to 10,000
hatchlings (0.01 to 0.1%) reach adulthood to nest and
reproduce.
Seven of the world’s eight species of sea turtles are known
to nest on Mexican beaches, and extensive conservation networks
are in place in order to protect nesting sites. The coast of Jalisco
(including the Costa Alegre) is one of these important nesting
sites, and several groups are involved in their protection.
Examples of these groups include:
•University
of Guadalajara
•Centro
Universitario de la Costa Sur (University of Guadalajara)
• Campamento las Guásimas
• ECOBANA
• SEMARNAT
• Experience Mex-ECO Tours.
The
work involves the patrolling of nesting beaches and collecting
all the nests encountered. They are then relocated in a protected
area close to the camp. Patrolling of the beaches makes
it far more difficult for poachers to come into contact with
turtles and the relocation of
nests decreases the chances of predation from other animals.
Volunteers and staff at the camps all take part in the process,
as well as monitoring the hatchling rates and releasing the hatchlings
into the sea.
All of the work that takes place on such sea turtle conservation
projects is monitored by SEMARNAT (Secretaria
del medio ambiente y recursos naturals) –
Government
section
for wildlife and natural resources.
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