A common question in people’s minds is, ‘why do you tag turtles?’ and ‘what information results from the tagging data?’, ‘why do you take DNA samples?’, and ‘how does this help with sea turtle conservation?’. These are great questions and are wide open to a number of responses and explanations. So to give you an idea of one way this data helps us with sea turtle conservation, I’d like to share with you some fascinating information, just in, from Brian Shamblin, a Ph.D. candidate at UGA who has been collecting samples and studying the genetics of nesting loggerhead sea turtles in Florida and Georgia.

Last season, 2008, we had a very large female nesting turtle on Jekyll Island, which the 2008 patrol interns fondly named ‘Big Bertha’ (pictured right). She was very feisty and like to try to bite everyone! Fortunately the interns were quick on their toes, so no one got bit. She arrived on JI already having both flipper tags and a PIT tag, indicating to us that she was not new to nesting and had been seen before. Looking back in our historical data as well as receiving some information from Peter Eliazer who maintains the Cooperative Marine Turtle Tagging Program (CMTTP) database, we were able to determine the following information about ‘Big Bertha’:
*She was originally seen and tagged in Georgia on July 1, 1994. She false crawled 2x and nested 1x this year.
*She was seen again in 1997, where she false crawled 3x and nested 3x on JI.
*She was seen on JI in 2006 and DNA sample was taken.
*She was seen again on JI in 2008, where she false crawled 3x and nested 3x. She was also seen false crawling on another GA island this year.
Ok, so that’s Bertha’s history, which in an of itself is cool. But now on to even coolerinformation….
Due to the database Brian has of individual turtle DNA, and based on continued sampling ever year, he believes that ‘Big Bertha’ looks to be mom of 2 other turtles nesting in GA! One that nested in Blackbeard in 2005 and another turtle that nested on Jekyll in 2008! So if we factor in the latest research that loggerhead sea turtles reach sexual maturity at approximately 30-35 years of age, this means Bertha is at least 60 years old! HOW COOL IS THAT?!

I do not have any more information at this time regarding the turtles from Blackbeard, such as when she was first seen, but I can tell you that the turtle from JI (pictured Left) arrived with a PIT tag but no flipper tags.
Loggerhead sea turtles typically take 1-3 years off between nesting seasons, so we will look forward to hopefully seeing Bertha in another year or two!
Sincerely,
Stefanie Ouellette
Marine Field Programs Coordinator