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Conservation hotspots : implications of intense spatial area use by breeding male and female loggerheads at the Mediterranean’s largest rookery

Schofield, Gail, Lilley, Martin K.S., Bishop, Charles M., Brown, Peter, Katselidis, Kostas A., Dimopoulos, Panayotis, Pantis, John D. and Hays, Graeme C. 2010, Conservation hotspots : implications of intense spatial area use by breeding male and female loggerheads at the Mediterranean’s largest rookery, Endangered species research, vol. 10, pp. 191-202, doi: 10.3354/esr00137.

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Title Conservation hotspots : implications of intense spatial area use by breeding male and female loggerheads at the Mediterranean’s largest rookery
Author(s) Schofield, Gail
Lilley, Martin K.S.
Bishop, Charles M.
Brown, Peter
Katselidis, Kostas A.
Dimopoulos, Panayotis
Pantis, John D.
Hays, Graeme C.ORCID iD for Hays, Graeme C. orcid.org/0000-0002-3314-8189
Journal name Endangered species research
Volume number 10
Start page 191
End page 202
Total pages 12
Publisher Inter-Research
Place of publication Oldendorf, Germany
Publication date 2010
ISSN 1863-5407
1613-4796
Keyword(s) conservation management
endangered species
population density
marine vertebrate
migratory species
multiple paternity
wildlife telemetry
Summary The implementation of appropriate protection measures for endangered species in protected areas requires knowledge of their fine-scale habitat use. In May and June of 2006 and 2007, we used GPS loggers (some linked to the Argos system) and a conventional Argos transmitter to track male and female loggerhead turtles Caretta caretta in the vicinity of the breeding area of Laganas Bay within the National Marine Park of Zakynthos, Greece. We obtained (1) 9681 useable locations (mean: 1383 locations ind.–1; range: 519 to 2198 locations) from Tracktag GPS loggers attached to 7 females for a mean duration of 34 d (range: 17 to 52 d); (2) 1245 useable locations (mean: 311 locations ind.–1; range: 38 to 1110 locations) from 4 males fitted with Fastloc Argos tags for a mean duration of 29 d (range: 3 to 51 d) and (3) 100 locations from 1 male fitted with a conventional Argos satellite tag tracked for 128 d. GPS data indicated that before the onset of nesting, both males and females primarily used an area within 500 m of the shore along a core 9 km stretch of coastline, where existing protective legislation requires strengthening. Our observations suggest that a 76.7% female-biased operational sex ratio, measured previously from in-water surveys, may represent a realistic sex ratio estimate in the period before nesting starts. In the first month following the onset of nesting, female spatial distribution remained similar, whereas most males departed for distant areas presumably to forage. Our study provides quantitative evidence of the need to improve the management planning and conservation measures to protect sea turtles in a coastal breeding area, and new insights on male turtle migration.
Language eng
DOI 10.3354/esr00137
Field of Research 069999 Biological Sciences not elsewhere classified
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2010, Inter-Research
Free to Read? Yes
Persistent URL http://hdl.handle.net/10536/DRO/DU:30058323

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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.