Corpus ID: 59674072

Techniques for Measuring Sea Turtles

  title={Techniques for Measuring Sea Turtles},
  author={A. Bolten and A. Carr},
Sea turtles are measured to accomplish a number of objectives, and there are many technique and equipment options. The objectives may dictate different levels of accuracy and precision (see below) as well as the appropriate methods and equipment to be used. Sea turtles are measured on nesting beaches to relate body size to reproductive output, to determine minimum size at sexual maturity, and to monitor nesting female size for a particular rookery. Sea turtles are measured on foraging grounds… Expand

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The turtles of Venezuela
Guest editorial : Measuring sea turtles
  • Marine Turtle Newsletter
  • 1986
Measurement error : The great chelo - nian taboo , p . 47 - 49
  • and Y . Fernandez ( Compilers ) . Proceedings of the Sixteenth Annual Symposium on Sea Turtle Conservation and Biology
  • 1998
The Turtles of Venezuela . SSAR Contribution to Herpetology No
  • 1984
Manual of sea turtle research and conservation techniques