Naslov
Regional Red List assessment of loggerhead sea turtle Caretta caretta in the Mediterranean Sea

Autori
Lazar, Bojan ; Heppell, Selina ; Snover, Melissa

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Third Mediterranean Conference on Marine Turtles : Book of abstracts / - Tunis : Barcelona Convention – Bern Convention – Bonn Convention, 2008, 3-3

Skup
Mediterranean Conference on Marine Turtles (3 ; 2008)

Mjesto i datum
Hammamet, Tunis, 20.10.2008. - 23.10.2008

Vrsta sudjelovanja
Plenarno

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
population status; population trend; IUCN; red listing; population modelling
(population trend; IUCN; red listing; population modelling)

Sažetak
The IUCN Red List Categories and Criteria were originally developed for classifying species at high risk of extinction at the global level. However, global Red List Categories may fail to adequately assess the extinction risk of populations at the smaller geographical scale, e.g. at regional, national or local levels. Following the Guidelines for Application of IUCN Red List Criteria at Regional Levels, we analyzed time series of loggerhead sea turtle nesting data from nine selected index sites in Greece, Turkey, Cyprus and Israel for trend and variance. We then performed quantitative analyses of quasi-extinction risk over a 100 year time horizon, using a Population Viability Analysis that is based upon a diffusion model. We applied two-year running sum of nests to provide a closer estimate of risk based on the number of nesting female while reducing some of the variance that is due to individual remigration interval. Our extinction risk calculation and Red List category assignment is based on the proportion of replicate simulations that cross pre-set threshold values, following IUCN criteria, and incorporating analysis of existing threats to the population and its habitats.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA