New Jersey kids help save endangered turtles

The 5-year-olds proudly wore T-shirts that read "SLOW ... Turtle Crossing" across the front. The class from the Avalon/Stone Harbor combined kindergarten near Stone Harbor, N.J., had made and sold turtle-shaped cookies at their school to do their part to help save the terrapins, endangered reptiles that live in the nearby salt marshes. (A terrapin is a type of turtle.)

They and many other area schoolchildren have become involved in a hands-on terrapin research and conservation program at the Wetlands Institute in Stone Harbor.

I met the terrapin-loving students when I visited the Wetlands Institute to find out about the work being done there.

"Watch out for those jaws!" Roger Wood, director of the institute's Terrapin Conservation Project, warned me as a baby terrapin squirmed in my hand.

At home in salt marshes

I had just picked up the small turtle. Its head and hind webbed feet were making constant thumping motions against my fingers.

Terrapins are the only reptiles of the salt marsh, an area where saltwater from an ocean, bay, or gulf meets freshwater from a river. They are found in temperate and subtropical areas such as the East and Gulf coasts of the United States.

Terrapins also live in western India and southern Asia. They do not naturally occur in fresh water. This is one of the reasons they do not make good pets.

While most people like terrapins, the tiny turtles have had great trouble with humans. A hundred years ago, they were eaten as a delicacy.

Nowadays, many of them die trying to escape from commercial crab traps. They find their way into the traps, but are unable to get out, and so may drown.

There's good news from scientists at the institute about this, though: They have developed a wire excluder device to fit into the crab traps. This keeps terrapins out, but allows crabs to enter.

Terrapins face dangers from other animals, too. Crows and raccoons attack them. Skunks like to dig into their nests and eat the eggs.

If all that weren't enough, the building of seaside vacation homes and resorts has resulted in the loss of beaches and marsh grasses, where terrapin nesting typically takes place.

However, it's the female terrapin that is in the greatest danger. During June and July, she plods along the New Jersey shore seeking out higher ground on which to lay her eggs (typically eight to 10 per nest). Female terrapins like to build their nests on sand dunes or narrow reaches above the high tide line.

"Unfortunately," Dr. Wood says, "cars kill as many as 40 terrapins a day before they can reach the nesting areas."

That can mean the daily loss of 300 to 400 eggs that will never become terrapins. So every 24 hours, a patrol car from the Wetlands Institute searches the highway for terrapins that have been run over.

From rescue to hatching

In addition to rehabilitating injured adult terrapins, scientists rescue the eggs from killed females and take them back to the institute, where they are incubated. That means placing them in a warm spot that imitates the mother's warmth.

The future terrapin's sex is determined by the temperature during incubation. If the temperature is kept at 86 degrees F., females will be produced in six to eight weeks. Males are produced in two to four weeks at a cooler 78 degrees F.

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