Meeting Abstract

P3.156  Tuesday, Jan. 6  Reproductive Biology of the Alligator Snapping Turtle (Macrochelys temminckii) TEARE, Amber*; ROSTAL, David; MARLEY, Philip; MOSS, Amanda; Georgia Southern University; Georgia Southern University; Georgia Southern University; Georgia Southern University amber_r_teare@georgiasouthern.edu

Knowledge of a species biology is necessary for a better understanding of its phylogeny, as well as for more successful conservation and management. Reproductive biology is especially important in comprehending the fitness potential of individuals and growth potential of populations. Reptiles allow for unique inquiry in the field of reproductive biology due to their long life spans and late sexual maturity. Freshwater turtles are often studied as models of ectothermic reproduction. The alligator snapping turtle is a slowly-maturing, low fecund, freshwater turtle that, despite overwhelming trapping during the 1960s-1980s, has been understudied. Being confined to river systems that drain in the Gulf of Mexico, this species may be more severally impacted by habitat destruction and environmental modification. Early studies on M. temminckii demonstrated basic reproductive similarities to other turtles, particularly its sister species Chelydra serpentina. However, practically nothing is known about alligator snapping turtle reproductive ecology or physiology, especially with respect to hormonal seasonality. The Flint River, Georgia population of alligator snapping turtles is under study to delineate their reproductive hormone cycle, gonadal development, egg production and nesting attributes. Seasonal estradiol, testosterone, and corticosterone cycles will be examined via ELISA. Individuals will also undergo ultrasound, x-ray and laparoscopy to determine reproductive status. Nests will be collected to reveal hatching success and sex ratios. These findings will allow for comparisons among testudines, particularly Chelydridae, and for more accurate management techniques for this threatened species.