Archive for April, 2017

What causes a sea turtle to be born male or female?

This item was filled under Ecosystems, Facts, Ocean Life


In most species, gender is determined during fertilization. However, the sex of most turtles, alligators, and crocodiles is determined after fertilization. The temperature of the developing eggs is what decides whether the offspring will be male or female. This is called temperature-dependent sex determination, or TSD.

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Deepwater Horizon Oil Spill: Longterm Effects on Marine Mammals, Sea Turtles

This item was filled under News


A recent Endangered Species Research special issue summarizes some of the devastating longterm effects of the Deepwater Horizon oil spill on protected marine mammals and sea turtles. The issue compiles 20 scientific studies authored by NOAA scientists and partners covering more than five years' worth of data collection, analysis, and interpretation. The research indicates that populations of several marine mammal and sea turtle species will take decades to rebound. Significant habitat restoration in the region will also be needed.

NOAA scientists used a variety of cutting-edge research methods in these studies and many others as part of a Natural Resource Damage Assessment. This is the legal process where we investigate the type of injuries caused by the oil spill, quantify how many animals were harmed, develop a restoration plan to compensate for the natural resource injuries, and hold responsible parties liable to pay for the restoration.

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