Loggerhead sea turtles (Caretta caretta) in the Pelagos Sanctuary

The following paper was just published in the Marine Ecology Progress Series journal.  Enjoy reading!

Lauriano G, Panigada S, Casale P, Pierantonio N, Donovan GP (2011) Aerial survey abundance estimates of the loggerhead sea turtle Caretta caretta in the Pelagos Sanctuary, northwestern Mediterranean Sea. Mar. Ecol. Prog. Ser. 437:291-302.

ABSTRACT – Aerial line transect surveys, totalling 16590 km, were performed in winter and summer 2009 in the Pelagos Sanctuary, NW Mediterranean. A total of 207 loggerhead sea turtles were sighted, with only 9 sightings during the winter. In this season average raw ‘surface’ density (i.e. animals at or near the surface) was 0.002 turtles km–2, and on the basis of line-transect analysis, we estimated 237 specimens (CV = 34.33%; 95% CI = 122–461). The summer estimate resulted in 4083 animals at surface (CV = 14.59%; 95% CI = 3061–5466) in the study area, with a density of 0.046 km–2. Results indicated strong seasonal differences and lower densities than those found in comparable surveys in Spanish Mediterranean waters. Nevertheless, the ecological and oceanographic features of the Pelagos Sanctuary, established primarily for the protection of marine mammals, render it an important area also for Mediterranean loggerhead sea turtles. The potential for human-induced mortalities of turtles summering in the Pelagos Sanctuary is high. In this context, it is vital to obtain reliable estimates of absolute and relative abundance over time, monitor the status of loggerhead sea turtles and inform the development of effective conservation actions. This study illustrates the ability of aerial surveys to provide such data in this area.


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s