From: "rjparcelles" <rjparcelles@yahoo.com>
Subject: Lights out as hatching season arrives for baby turtles
Lights out as hatching season arrives for baby turtles
By Neil Santaniello
Staff Writer
Sun-Sentinel.com
Posted July 8 2002
http://sun-sentinel.com/news/local/palmbeach/sfl-phatch08jul08.story
This month and next, thousands of baby sea turtles should
be digging out of
their buried beach nests at night. Under the pale
moonlight, they'll
scramble across the sand to begin their life at sea.
The bulk of those hatchlings-- less than 2 inches long when
they dig their
way out of a nest -- will surface in July and August. That
means it's
especially important to keep beaches dark during the next
several weeks,
county environmental officials say.
They're urging residents to obey turtle-protection laws and
extinguish, dim
or redirect artificial lights along the coast that become
fatal lures for
baby sea turtles.
Those lights can draw hatchlings away from their natural
destination -- the
Atlantic Ocean -- and to their deaths in streets, parking
lots and sand
dunes, sea turtle experts say.
"Beachfront lighting is the No. 1 killer of hatchlings,"
said Kirt Rusenko,
who supervises the sea turtle program at the Gumbo Limbo
Nature Center in
Boca Raton. "Turn the lights out."
Officials also warn people not to break federal law by
pocketing any
hatchlings they might find. Those who do that occasionally
run into trouble
keeping the hatchling healthy. They then drop the turtle
off at a nature
center and claim to have just found it, Rusenko said. That
doesn't fool the
turtle experts.
"The soft shell lets you know really well they were getting
a bad diet" in
captivity, he said.
About 16,000 turtle nests are found in Palm Beach County
beaches alone
every year, second only to Brevard County. In 2001, Palm
Beach County had
227 cases of hatchlings wandering in the wrong direction,
affecting an
estimated 7,443 baby turtles, said Paul Davis, sea turtle
program
coordinator for the Palm Beach County's Department of
Environmental
Resources Management.
Around Florida last year, there were 739 instances of
disorientation
affecting 28,587 baby sea turtles, according to the Florida
Fish and
Wildlife Conservation Commission.
Condominium lights were cited as problem in 30 percent of
the disoriented
hatchling cases. Street lights accounted for 20 percent,
and glowing skies
from development or other artificial light sources were
responsible in 24
percent of all turtle disorientations, commission figures
for 2001 show.
All the county's coastal cities and beaches in
unincorporated areas are
covered by laws that prohibit visible light on the beach
during the summer
turtle-nesting period, Davis said.
Threatened loggerhead sea turtles dominate the nesting in
South Florida,
followed by much smaller numbers of green and leatherback
turtles. So far
this season, 400 loggerhead turtles have nested on Boca
Raton's 5 miles of
coast, which can get more than twice that number of sea
turtle nests during
some seasons. Nesting starts in March and tapers off
dramatically by the
end of July.
The 120 or so eggs loggerheads lay in each nest incubate
for 50 to 60 days
inside the sand. Loggerhead hatchlings emerge only when the
sand cools down
at night or sometimes when thunderstorms and overcast skies
lower sand
temperatures, Rusenko said. Once they reach the water,
hatchlings are
vulnerable to predators that include fish, crabs and birds.
They'll swim frantically, though, until they reach oceanic
rafts of
drifting sargassum, where they can hide and safely grow
larger.
"In a good year we'll have 100,000 hatchlings going out to
sea," Rusenko
said.
Boca Raton began to see its first waves of tiny loggerhead
hatchlings two
weeks ago, Rusenko said.
"Right now, we're seeing between one and three nests a
night hatch," he
said. Later this month, that should peak at almost a dozen
nests per night,
he said.
Because of a rainy, cloudy June, nests likely will yield a
lot more males
than usual, Rusenko said. Sand temperature determines the
sex of incubating
sea turtles. Cooler sand means more males, while warmer
sand is more likely
to produce females.
# # #
Neil Santaniello can be reached at
nsantaniello@sun-sentinel.com or
561-243-6625.
http://sun-sentinel.com/news/local/palmbeach/sfl-phatch08jul08.story
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