More on turtle work

Turtle laying her eggs

Hawksbill turtles go into some sort of trance when laying their eggs and mademoiselle here shows us how that looks like.

Eggs weighed and measured

While she is in this low state of awareness, her eggs are quickly counted and weighed.This is done by two people as it has to be done very quickly before she completes laying and starts covering the nest with sand. If she does complete her egg laying before the weighing and measuring is complete the eggs are quickly put back anyway.

data logger

This is the tail end of the data logger (and turtle :) ) which is also currently being placed in the nest. Nature Seychelles is piloting this experiment with data loggers – with technical assistance from Kelonia – to gauge nest temperature. Data loggers record temperatures of nests throughout incubation. Sex determination in sea turtles is dependent on temperature, with a pivotal temperature in which equal numbers of males and females are produced. Temperatures above this pivotal number produce females and those below produce males. So data loggers help with sex ratio determination. The temperatures can also be used as indicators of the potential impact of  global warming on hawksbill turtles.

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One Comment

  1. Posted December 11, 2009 at 5:59 am | Permalink

    You need think about it. Despite the emails, the overwhelming evidence showing global warming is happening hasn’t changed.
    “The e-mails do nothing to undermine the very strong scientific consensus . . . that tells us the Earth is warming, that warming is largely a result of human activity,” Jane Lubchenco, who heads the National Oceanic and Atmospheric Administration, told a House committee. She said that the e-mails don’t cover data from NOAA and NASA, whose independent climate records show dramatic warming.

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