
April 17 to 19, 2001, was a historic occasion. At the mouth of the Devi river in the state of
Orissa, on the eastern sea coast of India, Chandra, a nesting female Olive Ridley Turtle and
three others of her species, were being tagged. This was the first time in India that turtles
were being tagged. With the help of satellite transmitters, the movement of Chandra and
the others can be tracked even after they venture back into the deep sea, far from the
nesting site. The migration patterns of these turtles have been a mystery to biologists all
these years. This information is vital for developing conservation plans for the Olive
Ridley Turtles, an endangered species under
Schedule I of the Wildlife Protection Act, 1972, and
the IUCN Red List 2000. With these special tracking
devices, it will now be possible to study their long
range migration and their foraging areas.
This unique exercise was part of an all-India
initiative to develop a sustainable model for
conservation of these endangered marine reptiles and
restoration and conservation of their habitats along
the Indian coastline in ten states in India.
The most interesting aspect of the Olive Ridleys life
cycle is their nesting behaviour. Every year at
Gahirmatha and two other sites on the Orissa coast,
hundreds of thousands of Olive Ridleys congregate
on the beach, between December and April, for mass
nesting. This phenomenon is called the arribada (arrival in Spanish). In 1999, by the end
of March, it was estimated that around 2,00,000 turtles had nested at the Gahirmatha
beach. This narrow nesting beach is so densely packed with nesting female turtles that
successive waves of turtles on the beach unearth the eggs from the previous nesters.
Information about this enormous rookery came to light to the scientific community only in
1974. Since then measures have been taken to conserve this turtle nesting site.
Mass nesting sites such as Gahirmatha have been greatly impacted by natural processes in
the region in the recent past. When discovered, mass nesting was occurring along a 10 km
stretch of the coastline. In the early 1980s, the turtles themselves deserted this site to shift
northwards to the Ekakula nasi (nasi means sand spit near a river mouth). In 1989, a
severe cyclone fragmented this nesting beach. The sand pit now formed an elongated
island, around 4 km in length, surrounded by the Maipura river on three sides, and the Bay
of Bengal on the east. That year, no more than a hundred turtles nested at the island. Later,
mass nesting started on the island, now renamed as Ekakulnasi rookery. Nature had more
in store. In 1998, the island got further fragmented. Two islands were formed with an
average width of 50 mtrs. This narrow width left very little space for nesting, leading to the
Arribada
Threats to the Turtles
Rescuing the Ridleys
Species conservation efforts
Partnership between NGOs and Government
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