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The
Green Turtles - Living with Hazards and Hope
By
Ahmer Ali Rizvi
remarkable decline has been observed in the turtle's visitation
and nesting at Karachi beaches in
the last decade, despite commendable efforts of an overly dedicated team.
The
glimpse of a giant crawling creature emerging from sea to the sand
excited me, since I was waiting so long for an interesting event to
start. It was a full-sized matured female Green Turtle that was coming
out of water to make a nest and lay eggs at Sandspit Beach.
It was
10:45p.m. that night, and the moon was utterly absent from the sky. One
could only see the twinkling stars and some gleaming waves scattering on
the shore. I, along with my work-fellows, was
walking along the shore intending to watch and photograph the entire
session of digging nest by turtle, laying eggs, covering up the clutch
with sand and returning to the sea. This activity is known as 'turtle's
nesting', and it is accomplished in two to three hours, usually at night
when there is little disturbance at the beach.
The
turtle started digging a pit after crawling slowly for 30 to 40 meters
away from the shoreline. She first dug a larger pit to settle herself
in. She then started scooping out the sand through her hind flippers to
make a deeper burrow for the clutch. This hardship took more than an
hour. Finally, she started laying numerous eggs one after another.
Usually
the clutch size of a Green Turtle varies from 80 to 120 eggs per nest. I
could not count exactly the number of eggs she laid; however, I took
some splendid snaps during the course. On her way back to the sea, I
took some more snaps and left. It proved to be the most successful and
easiest photograph session I had with an animal in the wild.
I was
advised not to appear around the turtle and to take photographs until
she would have started laying eggs. Otherwise, it could make her return
without nesting. Once a turtle starts laying eggs, she anyhow, completes
the clutch even if she finds someone around.
Prior to
this excursion, I had never had a chance to watch marine turtles in
real. I did not even know much about them and the nitty-gritty of their
nesting at the beaches of Karachi.
Before
going to the expedition, I visited Sindh Wildlife Department and met
with Mrs. Fehmida Asrar, the project officer in Marine Turtle Project.
She is famed as 'Turtle Lady of Karachi', given that she is running the
turtle's protection project with great devotion for the past 23 years.
She briefed me about marine turtles, their nesting phenomenon and the
threats facing by Green and Olive Ridley Turtles globally. She also
informed me about the objectives and operations of the turtle project,
as well as the efforts and dedications of her team with respect to the
protection of turtles in this region. She further pointed out various
constraints confronting her towards the achievement of the project's
objectives.
The Green
Turtle is the second largest species of marine turtle family after the
Leatherback turtle. It can grow up to 3.5 feet in carapace size, and
could be as heavy as 180 kilogram. It is found throughout the world in
all tropical and sub-tropical oceans. The prominent nesting beaches of
Green Turtle include the U.S. Virgin Islands, Florida Bay, Mexican
Islands, Costa Rica, Brazil, Saudi Arabia, Oman, Pakistan, India,
Indonesia, Philippine, Malaysia and Australia.
Green
Turtles breed in different countries in different seasons generally from
July to November. In Pakistan, Green Turtle nests for eggs on Sandspit
and Hawksbay beaches throughout the year with a remarkable apex from
September to January. A breeding female nests three to four times during
the season. Every year, an average of 800 nests has been observed at
beaches of Karachi. Coastal areas of Balochistan are also believed to
support a large number of Green Turtles.
The Green
Turtle species is facing various challenges in order to last in the
marine world. The threats to its population include several factors,
from its low growth rate to other environmental constraints. The rate of
successful hatching from eggs in an ideal situation and habitat is only
55%. The eggs buried in sand are also foraged by crabs, crows, eagles,
feral dogs etc. The survival rate of hatchlings in sea is as low as
0.1%, since a large number of baby turtles are eaten by fish and other
underwater creatures. Many large and small turtles are also trapped in
the nets of fish-trawlers.
There is
another perilous fact about newly born turtles that they start crawling
towards light. Those who have been hatched in night hours near any house
or hut with lights will move towards it instead of going into the sea.
There is a risk of being consumed by dogs as well as quashing by any
vehicle for those little turtles.
Human
intrusion is another key factor to the destruction of its population.
The meat of Green Turtle is popular in many countries; therefore, it is
netted largely. The eggs of Green Turtle are also taken away by people,
since they are believed to cure various ailments. Commercial and
industrial expansion on beaches like construction of private huts,
hotels, resorts, recreational clubs and hydropower plants etc. cause a
sever destruction to turtle's nesting grounds in many parts of the
world. Presently, the status of the Green Turtle is endangered on all of
its locales. Numerous projects are running in many countries in order to
protect Green Turtles from total extinction.
The
Marine Turtle Project run by Sindh Wildlife Department is one of them.
The project team works round the clock at Turtle Nursing Centers, two of
them at Sandspit and one at Hawksbay. The team consists of five guards
and a few volunteers who live nearby. They are providing protection both
to the Green Turtles and its laid eggs by guarding them from predators.
They start tracking along the beach soon after dark and mark the places
where turtles are sighted on the course of laying eggs. After the return
of turtle to sea, the workers dig the pit, collect eggs and transplant
them in netted enclosures inside the hatcheries.
The
collected eggs are incubated under the sand in safe enclosures and the
hatchlings are produced in 40 to 60 days. The workers are also
responsible for checking each enclosure for new hatchlings every hour.
As soon they find any baby turtle out from the egg, they immediately
carry it to the shore and release it safely into the sea. During our
expedition, we also entered one of the turtle's hatcheries and probed
the newly born turtles in detail. We then took the baby turtles to the
shore and release them into the sea.
The
project team is also maintaining a proper record of each egg and the
hatchling since the project was started. "Approximately 1.7m eggs
have been transplanted from open area to the safe enclosures and more
than 0.5m hatchlings have been released into the sea since the project
was started in 1980," informed Fehmida Asrar.
Breeding
females are also tagged with number plates on their front flippers.
These tags help in determining the movement of Green Turtles across
oceans since they have long migration tendency. In 1995, a female turtle
was tagged and released in the sea by the Marine Turtle Project team at
Hawksbay. The same turtle was recaptured from Beraisole Village, North
East Africa exactly after 365 days. The distance negotiated by this
turtle was about 3,240 km with an average of 8.9 km per day. Some other
turtles tagged at Hawksbay have also been caught in Iran and India.
A
remarkable decline has been observed in the turtle's visitation and
nesting at beaches of Karachi in the last decade, despite commendable
efforts of an overly dedicated team for long. "There are many
complex problems, which are increasing day by day in order to provide a
healthier and safer environment to turtles at our beaches. Inadequate
research facilities, lack of co-operation among environmental
organisations and, above all, shortage of funds are the key
problems," Fehmida added.
Marine
Turtle Project is the last hope for the survival of Green Turtles in
this region. Though, the population of turtles has not been increased so
far, however it has been sustained to an extent that the Green Turtle
can still be seen nesting at the beaches of Karachi. If the project was
not there, we would have been unable to explain to our next generation
how the Green Turtle looked like.
Public
awareness and co-operation is essential in order to achieve the best of
the turtle protection project. People who visit Sandspit and Hawksbay
beaches for picnic, should realise that these beaches are the crucial
abodes with no choice for turtles to multiply their population, in other
words, to continue their existence in this region.
Therefore,
these turtles need people to ensure their safe existence and survival.
Their nesting beaches also need to be taken care of. One should stay
calm, quiet and distant when one spots any turtle coming out of water.
It's better to get closer silently and photograph only when a turtle has
started laying eggs. Pick up any found hatchling carefully and release
it into the sea immediately. Inform Wildlife department staff (stationed
nearby), if any turtle is found with tags in its flippers. Avoid
throwing food-waste and garbage on beaches as well as in the sea.
Credits:
©1997-2004
Wildlife of Pakistan-All Rights
Reserved.
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