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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Long-term monitoring of leatherback turtle diving behaviour during oceanic movements
Journal of Experimental Marine Biology and Ecology, Volume 328, No. 2, Year 2006
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Description
The diving behaviour of four leatherback turtles (Dermochelys coriacea) was recorded for periods of 0.5-8.1 months during their postnesting movements in the Indian and Atlantic Oceans, when they covered 1569-18,994 km. Dive data were obtained using satellite-linked transmitters which also provided information on the dive depths and profiles of the turtles. Turtles mainly dove to depths < 200 m, with maximum dive durations under 30-40 min and exhibited diel variations in their diving activity for most part of the routes, with dives being usually longer at night. Diurnal dives were in general quite short, but cases of very deep (> 900 m) and prolonged (> 70 min) dives were however recorded only during daytime. The three turtles that were tracked for the longest time showed a marked change in behaviour during the tracking, decreasing their dive durations and ceasing to dive deeply. Moreover, diel variations disappeared, with nocturnal dives becoming short and numerous. This change in turtle diving activity appeared to be related to water temperature, suggesting an influence of seasonal prey availability on their diving behaviour. The turtle diving activity was independent on the shape of their routes, with no changes between linear movements in the core of main currents or looping segments in presence of oceanic eddies. © 2005 Elsevier B.V. All rights reserved.
Authors & Co-Authors
Sale, A.
Italy, Pisa
Scuola Normale Superiore Di Pisa
Italy, Pisa
Università Di Pisa
Luschi, P.
Italy, Pisa
Università Di Pisa
Mencacci, R.
Italy, Pisa
Università Di Pisa
Lambardi, Paolo
Italy, Pisa
Università Di Pisa
Hughes, George R.
South Africa, Pietermaritzburg
Veterinary Services Kwazulu-natal
Hays, Graeme Clive
United Kingdom, Swansea
Swansea University
Benvenuti, Silvano
Italy, Pisa
Università Di Pisa
Papi, F.
Italy, Pisa
Università Di Pisa
Italy, Rome
Accademia Nazionale Dei Lincei, Italy
Statistics
Citations: 50
Authors: 8
Affiliations: 5
Identifiers
Doi:
10.1016/j.jembe.2005.07.006
ISSN:
00220981
Research Areas
Environmental