|
Distribution and population estimates for the Olive
Ridley Sea Turtle -Lepidochelys olivacea
Distribution
and population:
- Rookeries:
- Morro Ayuta, La Escobilla, Chacahua, Piedra de Tlacoyunque,
Mismaloya-La Gloria , Mexico
- Honduras, Guatemala
- El Salavador, Nicaragua
- Nancite and Ostional, Costa Rica, Panama
- Surinam
- Angola, Namibia and Skeleton coast
- Mozambique
- Madras and Orissa, India
- Sri Lanka
- Arnhemland, Australia
- Nasugbu, Batangas ,Cavite and Zambales - Philippines
(See email below - 13 Feb, 199)
- Goa , India (see email below 6 March 2001)
On Sat 13 Feb 1999, San-San Misa wrote:
Dear Mr. Poland:
I was looking into the distribution of Olive Ridley marine
turtles in your page and noticed that there are no reports
of nesting in the Pacific region. You are in for a pleasant
surprise...
Olive Ridley turtles have been reported to nest in the western
coast of the Philippine islands. With the assistance of
the officials from the Protected Areas and Wildlife Bureau,
an office of our Department of Environment and Natural Resources,
we have reported sightings of these precious turtles on
the coast of Nasugbu, Batangas. Similar nestings have recently
been reported in Cavite and Zambales, both on the western
portion of our country.
We are private citizens who own a beachfront property in
the province of Batangas which we have frequented for the
last 30 years. Sadly, our conservation efforts have begun
only very recently (December 1998). We did not have any
idea that turtles still nest in the area which was quite
populated in the last years until a storm washed away some
houses two years ago and the number of visitors diminished.
Recently we have conducted seminars on the conservation
of marine turtles among the fisherfolk who have been reported
as the main predators of these turtles. They have been selling
the eggs for the last 30 to 40 years. And so, the nestings
have grown scarcer by the year. Nevertheless, we are committed
to saving these turtles and preserving their existence in
the area for as long as we can.
We have released almost a hundred hatchlings into the sea
in the last month. The eggs were previously found by a fisherman
whom we convinced not to poach the eggs. Verifications with
the Bureau have confirmed that these hatchlings were indeed
the Olive Ridley.
If you'd like to receive more information regarding the
Olive Ridley in the Philippines, please send me an e-mail.
Thank you very much.
Very truly yours,
Rosanna V. Misa
san2misa@hotmail.com
Email
to EuroTurtle on 6 March 2001
The Forest Department in Goa started a protection project
in 1998, identifying Morjim and Mandrem in North Goa and Palolem
in the South as nesting beaches.
We recently stayed in Morjim and were delighted to see that
this year the amount of nests has increased. The nests are
protected by netting, are numbered, and the date of laying
and approximate hatching is marked on a board next to each
nest. In February 2000, there were 14 nests but this year
26 nests have been isolated.
At the beginning of February, 684 hatchlings had made their
way to the sea and hopefully, many more have hatched since.
Best regards,
Steph Perkin & Ken Hill (London)

Observation shack and x2 nests -Morjim beach - Goa, India
(Feb 2001 - S Perkin)
- Range:
- Pantropical, living mainly in northern hemisphere.
- Major colonies near continental coastal waters.
- Olive turtles usually seen in large flotillas traveling
between breeding and feeding grounds.
- Hardly ever seen near Pacific oceanic islands.
- Population:
- Positive trends but actual population unknown.
- La Escobilla, Mexico: 800,000 nests on a beach which
is less than 4km long (Márquez and Peñaflores,
1997)
- Preban hunting - 138,000 nests per annum (1990)
- Postban - 525,000 nests per annum
- Big fluctuations
|
References used in distribution maps and population estimations.
- Agardy, T., Last Voyage of the Ancient Mariner p30-37, BBC Wildlife
December 1992,
- Bjorndal, Karen A. (Editor), Biology and Conservation of Sea Turtles
- (Smithsonian) 1995. (ISBN 1-56098-619-0)
- The FAO Species , Catalogue Vol.11. Sea Turtles of the World,
1990. (ISBN 92-5-102891-5)
- Lutz , P. L. and Musick, J. A., The Biology of Sea Turtles - (Marine
Science Series )1996. (ISBN 0-8493-8422-2)
- National Research Council, Decline of the Sea Turtles , 1990.
(ISBN 1-900455-005)
- Proceedings of the 15th Annual Symposium on Sea Turtle Biology
and Conservation, 1995.
- Proceedings of the 18th Annual Symposium on Sea Turtle Biology
and Conservation, 1998.
- Ripples, Jeff Sea Turtles: (World Life Library) 1996. (ISBN 0-309-04247-X
|
|