1. Welcome! Are you interested in tortoises? If so, we invite you to join our community! Our community is the #1 place for tortoise keepers to talk online. Once you join you'll be able to post messages, upload pictures of your tortoise and enclosure, and discuss any tortoise topic with other tortoise keepers. Get started today!

Genetic determination of tag loss dynamics in nesting loggerhead turtles: a new

Discussion in 'Sea turtles' started by Cowboy_Ken, Jun 26, 2019.

Help Support Tortoise Forums by donating:

  1. Cowboy_Ken

    Cowboy_Ken Well-Known Member 5 Year Member

    Nov 18, 2011
    Likes Received:
    Trophy Points:
    Location (City and/or State):
    Suburban-life in Salem, Oregon
    Genetic determination of tag loss dynamics in nesting loggerhead turtles: a new chapter in “the tag loss problem”

    For Author’s Affiliations go to https://bit.ly/2xezYAj Joseph B. Pfaller, [email protected]
    Kristina L. Williams,Michael G. Frick, Brian M. Shamblin, Campbell J. Nairn, Marc Girondot

    Marine Biology, July, 2019


    Capture–mark–recapture studies that fail to account for the frequency and dynamics of marker loss risk generating biased demographic estimates. In this study, we used permanent multilocus genotypes (i.e., “genetic tags”) and a new enhanced tag loss model to quantify the tag loss dynamics for both passive integrated transponder (PIT) and Inconel metal tags applied to loggerhead turtles (Caretta caretta) nesting on Wassaw Island, GA USA. Our results indicate that tag loss is most likely to occur within the nesting season in which tags were applied and is maximal just after tagging (maximum likelihood estimates): 0.00098 PIT tags day−1 and 0.007 Inconel tags day−1. After that, PIT tag loss was negligible and Inconel tag loss remained low but constant at 0.00028 tags day−1, such that after 5 years, the probability of losing one PIT tag was 0.06 and losing at least one Inconel tag was 0.46. The use of genetic tags in this study makes these the first truly accurate estimates of PIT and Inconel tag loss for marine turtles, and the new model of tag loss described herein represents an important advancement in the analytical methods used to estimate and compare tag loss dynamics.
Similar Threads: Genetic determination
Forum Title Date
Sea turtles Olive Ridleys of India Genetically different from other Olive Ridley turtles Mar 24, 2018

Share This Page