TEPEHUAJES, Mexico — Mexican and U.S. scientists on June 28 marked the
recovery of the Kemp’s Ridley sea turtle here with the largest
single-day turtle release since the binational recovery project began
decades ago, helping close to 240,000 four-inch hatchlings wriggle
across the sand and into the Gulf of Mexico.
Even though sea turtle nestings on Texas and Mexico beaches have
soared to record highs this year, scientists this week tempered
jubilation with caution, saying current levels of funding and work must
continue for the world’s most endangered sea turtle to fully recover.
“We cannot look at a 2,000-turtle arribada [arrival] on May 11 as
okay, that’s it, we got it, the turtle’s recovered, let’s pack it up
and go home,” said Jaime Peña, conservation biologist with the Gladys
Porter Zoo, who has been involved with the sea turtle project since
1994 and is now the U.S. operations director for all the turtle
recovery camps in Mexico.
“This is the one yard line–we cannot stop right now,” Peña
emphasized, borrowing the football analogy of a team about to score.
“We have to reach a higher level of nesting. In 1947, they recorded on
a very famous film over 40,000 turtles nesting one day in June, so
we’re not there yet. But we’re taking the right steps.”
So far this year, close to 100 Kemp’s Ridley sea turtles have come
in to nest on Texas beaches, twice last year’s number, vindicating
decades of work by U.S. scientists to establish a secondary nesting
location in Texas. But Mexico is still far and away the primary home
for the species, with more than 11,000 nestings so far this year within
the 125-kilometer stretch of beach where 90 percent of the world’s
Ridley population nests.
“Tonight is a big event,” said Octaviano Perez Tolentino, referring
to the record hatchling release June 28. He supervises turtle recovery
camps for the Secretario de Medio Ambiente y Recursos Naturales, the
Tamaulipas state natural resource agency. “Because all camps that are
involved with the Kemp’s Ridley sea turtle will release many, many
turtles and hopefully, in 15 years, these turtles will return to the
same area to begin their nesting process.”
In 1978, the first year record-keeping began, 924 Ridley nests were
recorded in Mexico. The numbers then steadily dropped to a record low
of 702 in 1985, the dark days when many scientists believed the turtle
was heading for extinction. Mexico had declared Rancho Nuevo the
nation’s first reserve for sea turtle conservation in 1977. It was here
north of Tampico in 1947 that Andres Herrera shot film that rocked the
wildlife science world, showing an arribada of an estimated 40,000
nesting females on a single day. But years of uncontrolled human
poaching and natural predation had already taken a toll in previous
decades. It takes 10-15 years for the turtle to reach sexual maturity.
So, even after the nesting beaches were protected, by the mid-1980s
scientists were still seeing the lag effect of adult females killed in
earlier years.
Still, scientists persevered. In 1981, the U.S. Fish and Wildlife
Service asked the Gladys Porter Zoo in Brownsville to administer U.S.
field operations in support of the Mexican conservation effort. Early
work focused on protecting nesting beaches near Rancho Nuevo, but in
1988, they created a second camp to the south near Barra del Tordo.
Today, a half dozen camps each summer now host dozens of biologists,
patrol technicians, grad students and volunteers from both nations, who
live in primitive conditions that are nonetheless far superior to
earlier decades. Each day they patrol the beaches on All-Terrain
Vehicles, looking for nesting females. When they find one, they
carefully dig up the eggs and take them back to protected corrals at
the camps. About 45 days later, the eggs hatch and teams take the
hatchlings down to the shoreline at night and let them crawl the last
few yards into the Gulf. In spite of the human helping hand, scientists
estimate that less than one percent of the hatchlings survive to
maturity.
For many years, Texas Parks and Wildlife Department and the USFWS
have provided funding to help keep the Mexican camps staffed and
running, realizing that if Ridleys were to survive in Texas and U.S.
waters, the key was supporting the Mexico nesting beaches.
In 1995, a new and unexpected partner emerged on the scene. Dr. Pat
Burchfield of the Gladys Porter Zoo had gone to speak at a Texas shrimp
industry meeting. This intrigued Les Hodgson, co-owner of Marco Sales,
a Brownsville shrimp wholesaler, and he began a crusade to involve
commercial shrimp fishermen in the Ridley recovery. Shrimpers had been
blamed as one reason for the turtle’s decline, and in the 1990s they
were required to start using Turtle Excluder devices, essentially holes
in shrimp trawls (nets) that allow sea turtles to escape and avoid
drowning.
“Pat Burchfield explained to us how important it was to keep a
balance in nature,” Hodgson said. “How if you lose a specie it has an
effect on another specie that has an effect on another specie. And if
we want to maintain a good shrimp stock out in the Gulf, we’ve got to
maintain a healthy environment for all the different animals out there.”
Hodgson and others got U.S. shrimpers to buy into the project,
including Wild American Shrimp, the marketing arm of the organization
that represents shrimpers in eight southern U.S. states along the Gulf
and the Atlantic. They approached their Mexican counterparts with the
organization CANAINPES about working together.
“They held their next meeting and came back and said only on one
condition,” Hodgson recalls. “And we said uh-oh what’s that, and they
said we want to be truly 50 percent partners with you. So together, the
Mexican industry bought the property here at Tepehuajes, and between
the fishermen from both countries, we spent about two months down here
building the 12-bed facility for the biologists that run this camp.”
Tepehaujes is the second most important Ridley turtle nesting beach.
The shrimpers, nonprofit environmental conservation groups and
others also lobbied the U.S. government for continued funding in years
when lean federal budgets threatened the project.
In 2000, the TPW Commission passed state regulations that set a
seasonal commercial shrimp fishing closure from near Corpus Christi to
the Mexican border, extending from the beach out to five nautical miles
from December to mid-July. This was done to better manage the shrimp
fishery, but it had the effect of protecting turtles during nesting
season, which runs roughly May-July.
By the early years of this decade, turtle nestings in both nations
had been steadily climbing for years, the fruit of many decades of
sustained cooperative work.
In the last few years, the Mexican government, with funding and
support from the shrimpers, has been working to involve the local
people near the turtle beaches, many of whom lost their livelihoods
when turtle egg sales were prohibited. The Tamaulipan governor’s wife
recently led an effort to bring artists and teachers to the small
village near Tepehaujes, looking for a way to bring new tourist dollars
tied to the sea turtles into the community. A commercial kiln was
funded and today local men, women and children make ceramic sea turtle
art objects that are sold at the Gladys Porter Zoo and other locations.
What will it take to declare the Ridley project a true success? The
recovery plan approved by government agencies involved calls for a
total of 10,000 nesting females to “downlist” the specie from
endangered to threatened. Experts estimate that would take about 30,000
total nestings in a single year. Based on current trends, Peña says the
project could hit that mark by 2012.
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