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Titolo:
MOLECULAR RESOLUTION OF MARINE TURTLE STOCK COMPOSITION IN FISHERY BYCATCH - A CASE-STUDY IN THE MEDITERRANEAN
Autore:
LAURENT L; CASALE P; BRADAI MN; GODLEY BJ; GEROSA G; BRODERICK AC; SCHROTH W; SCHIERWATER B; LEVY AM; FREGGI D; ABDELMAWLA EM; HADOUD DA; GOMATI HE; DOMINGO M; HADJICHRISTOPHOROU M; KORNARAKY L; DEMIRAYAK F; GAUTIER C;
Indirizzi:
BIO INTERFACE,27 BD 11 NOVEMBRE 1918,BP 2132 F-69603 VILLEURBANNE FRANCE WWF INT MEDITERRANEAN PROGRAMME I-00198 ROME ITALY UNIV LYON 1,UMR BIOMETRIE GENET & BIOL POPULAT 5558 F-69622 VILLEURBANNE FRANCE TETHYS RES INST,MARINE TURTLE CONSERVAT & RES PROGRAM I-00141 ROME ITALY INST NATL SCI & TECHNOL MER,CTR SFAX SFAX 3018 TUNISIA UNIV GLASGOW,MARINE TURTLE RES GRP,DIV ENVIRONM & EVOLUTIONARY BIOL GLASGOW G12 8QQ LANARK SCOTLAND UNIV FRANKFURT,ABT OKOL & EVOLUT D-60054 FRANKFURT GERMANY UNIV ROMA LA SAPIENZA,DIPARTIMENTO BIOL ANIM & UOMO I-00185 ROME ITALY NATL INST OCEANOG & FISHERIES ALEXANDRIA EGYPT MARINE BIOL RES CTR TAJURA TAJURA LIBYA UNIV AUTONOMA BARCELONA BELLATERRA 08913 SPAIN MINIST AGR & NAT RESOURCES,DEPT FISHERIES NICOSIA CYPRUS SEA TURTLE PROTECT SOC GREECE ATHENS 10682 GREECE DOGAL HAYATI KORUMA DERNEGI TR-80810 ISTANBUL TURKEY
Titolo Testata:
Molecular ecology
fascicolo: 11, volume: 7, anno: 1998,
pagine: 1529 - 1542
SICI:
0962-1083(1998)7:11<1529:MROMTS>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
MITOCHONDRIAL-DNA MARKERS; CARETTA-CARETTA; POPULATION-STRUCTURE; CHELONIA-MYDAS; GENETIC-MARKERS; SEQUENCES; MTDNA; PHYLOGEOGRAPHY; CONSERVATION; HAPLOTYPES;
Keywords:
CONSERVATION GENETICS; DNA MARKERS; LOGGERHEAD TURTLE CARETTA CARETTA; MITOCHONDRIAL DNA CONTROL REGION; POPULATION DYNAMICS; POPULATION STRUCTURE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
65
Recensione:
Indirizzi per estratti:
Citazione:
L. Laurent et al., "MOLECULAR RESOLUTION OF MARINE TURTLE STOCK COMPOSITION IN FISHERY BYCATCH - A CASE-STUDY IN THE MEDITERRANEAN", Molecular ecology, 7(11), 1998, pp. 1529-1542

Abstract

Based on an extensive sampling regime from both nesting populations and bycatch, frequency analyses of mitochondrial (mt) DNA control region haplotypes in the Mediterranean were used to assess the genetic structure and stock composition of the loggerhead sea turtle, Caretta caretta, in different marine fisheries. The analyses show the following. (i) In drifting longline fisheries working in Mediterranean pelagic habitats 53-55% of turtles caught originated from the Mediterranean stock; (ii) In bottom-trawl fisheries all turtle bycatch is derived from this regional stock; (iii) This regional stock contribution to fishery bycatch suggests that the population size of the Mediterranean loggerhead nesting population is significantly larger than previously thought. This is consistent with a recent holistic estimate based on the discovery of a large rookery in Libya. (iv) Present impact of fishery-related mortality on the Mediterranean nesting population is probably incompatible with its long-term conservation. Sea turtle conservation regulations are urgently needed for the Mediterranean fisheries. (v) The significant divergence of mtDNA haplotype frequencies of the Turkish loggerhead colonies define this nesting population as a particularly important management unit. Large immature and adult stages from this management unit seem to be harvested predominantly by Egyptian fisheries. (vi) Combined with other data, our findings suggest that all the nesting populations in the Mediterranean should be considered as management units sharing immature pelagic habitats throughout the Mediterranean (and possibly the eastern Atlantic), with distinct and more localized benthic feeding habitats in the eastern basin used by large immatures and adults. (vii) Between the strict oceanic pelagic and the benthic stages, immature turtles appear to live through an intermediate neritic stage, in which they switch between pelagic and benthic foods.

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Documento generato il 05/04/20 alle ore 05:34:45