Age structure of stranded Loggerhead Turtles (Caretta caretta) in Turkey

Abstract

The Mediterranean coast of Turkey includes important nesting beaches and marine habitats for the Loggerhead Turtle (Caretta caretta). We studied the demographic structure of this population by applying the skeletochronological method on stranded individuals. The mean age of stranded turtles was 27.0±3.83 years for females (N=10) and 40.1±14.97 years for males (N=7). The age of first reproduction was 23 years with a curved carapace length (CCL) of 61 cm for females and 21 years with a 67.5 cm CCL for males. The oldest observed female was 34 years old with a 67.8 cm CCL, while the oldest male was 59 years old with a 77.0 cm CCL. Incidental capture in fishing gear (60%) and marine vessel collisions (24%) were determined as the main causes of stranding.