Loggerhead turtles nesting in Libya: an important management unit for the Mediterranean stock

Saied, Almokhtar; Maffucci, Fulvio; Hochscheid, Sandra; Dryag, Salih; Swayeb, Bashir; Borra, Marco; Ouerghi, Atef; Procaccini, Gabriele; Bentivegna, Flegra

doi:10.3354/meps09548

Cited by 30 publications

(45 citation statements)

References 45 publications

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“…CC-A1 further differentiated to CC-A1.1, CC-A1.2, etc.) as done in previous studies using this extended fragment (Garofalo et al 2009, Monzón-Argüello et al 2010, Yilmaz et al 2011, Shamblin et al 2012, Saied et al 2012, Clusa et al 2013). Nineteen of these haplotypes are found within the 23 rookeries described above and in Table 1.…”

Section: Genetic Analysissupporting

confidence: 53%

“…Published data from 23 source MUs that have been identified to date, which combine into 4 DPSs, were used to estimate the proportions of each MU that were represented in the NED bycatch (Garofalo et al 2009, Monzón-Argüello et al 2010, Reis et al 2010, Yilmaz et al 2011, Saied et al 2012, Shamblin et al 2012, Clusa et al 2013: (1) (Raymond & Rousset 1995) as implemented in Arlequin 3.5 (Excoffier & Lischer 2010). Pairwise comparisons were then conducted between all pairs of years.…”

Section: Discussionmentioning

confidence: 99%

“…The latter MU encompasses a large stretch of disconnected nesting habitats in northeast Florida, Georgia, South Carolina, and North Carolina. More recently, studies have further resolved the genetic structure among southeastern USA rookeries and have identified additional MUs in central eastern and southeastern Florida (2011( , Shamblin et al 2012, while previously unsampled rookeries have been characterized in Cape Verde (Monzón-Argüello et al 2010), the Mediterranean (Garofalo et al 2009, Yilmaz et al 2011, Saied et al 2012, Clusa et al 2013, and Brazil (Reis et al 2010), and sampling has been supplemented for Quintana Roo and Cozumel, Mexico (Shamblin et al 2012). In combination, these studies now provide a much more comprehensive rookery coverage representing 23 MUs in the Atlantic and Mediterranean that may be used as a baseline dataset of potential source stocks for more comprehensive MSA.…”

Section: Introductionmentioning

confidence: 99%

“…This study incorporates newly available rookery data (Garofalo et al 2009, Monzón-Argüello et al 2010, Reis et al 2010, Saied et al 2012, Shamblin et al 2012, Clusa et al 2013 to identify the loggerhead stocks that use oceanic habitats in the North Atlantic. Loggerheads are the first species under the US Endangered Species Act to have designated DPSs.…”

Section: Introductionmentioning

confidence: 99%

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Genetic stock composition of loggerhead turtles Caretta caretta bycaught in the pelagic waters of the North Atlantic

LaCasella¹,

Epperly²,

Jensen³

et al. 2013

Endang. Species. Res.

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Sea turtle populations disperse widely across oceans and migrate between terrestrial nesting habitat and distant feeding and developmental habitats. Understanding population stock structure is important for accurately assessing threats such as mortality from fishery bycatch and for defining specific demographic units of conservation concern. We compared 775 bp mtDNA control region haplotypes from 389 juvenile loggerhead turtles sampled as bycatch in the US pelagic longline fishery in the western North Atlantic Northeast Distant (NED) region to haplotype frequencies observed in 23 genetically distinct nesting stocks representing the 4 distinct population segments (DPSs) that have been identified throughout the Atlantic Ocean and Mediterranean Sea. We used Bayesian mixed-stock analysis to produce stock composition estimates for juvenile loggerhead turtles that use pelagic habitat in the central North Atlantic. We found that nearly all of the loggerheads caught in NED waters belonged to the Northwest Atlantic DPS (mean = 99.2%), with the majority coming from the large eastern Florida rookeries (mean = 84.0%). We also detected contributions from the western Florida rookeries (mean = 11.7%) and Mexico (mean = 3.5%) but found little evidence of contributions from the rookeries of the South Atlantic, Northeast Atlantic, or Mediterranean DPSs. These results will help improve specific threat assessments and are relevant to ongoing development of conservation plans that are aligned to the recent DPS listings for loggerheads.

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Section: Genetic Analysissupporting

confidence: 53%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Genetic stock composition of loggerhead turtles Caretta caretta bycaught in the pelagic waters of the North Atlantic

LaCasella¹,

Epperly²,

Jensen³

et al. 2013

Endang. Species. Res.

View full text Add to dashboard Cite

show abstract

“…However, by using the 817 bp fragment, additional polymorphic sites have been detected in Atlantic (Monzón-Argüello et al 2010, Shamblin et al 2012 and Mediterranean loggerhead turtles (Yilmaz et al 2011, Saied et al 2012, Clusa et al 2013. Although the haplotypes CcP-2.1 and CcP-3.1 were observed in most samples in Sanriku (69.2 and 14.0%, respectively), there were some variations in the traditional haplotypes B and C (e.g.…”

Section: Discussionmentioning

confidence: 99%

Genetic composition of loggerhead turtle feeding aggregations: migration patterns in the North Pacific

Nishizawa¹,

Narazaki²,

Fukuoka³

et al. 2014

Endang. Species. Res.

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Genetic characterization of central Mediterranean stocks of the loggerhead turtle (Caretta caretta) using mitochondrial and nuclear markers, and conservation implications

Garofalo

Mastrogiacomo²,

Casale

et al. 2013

Aquatic Conservation

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In migratory species female- and male-mediated gene flow are important for defining relevant Management Units, and for evaluating connectivity between these and their respective foraging grounds. The stock composition at five Mediterranean foraging areas was investigated by analysing variation in the mitochondrial D-loop and six microsatellite loci in a sample of 268 loggerhead turtles (Caretta caretta) stranded or accidentally caught by fisheries. This involved a comprehensive Mixed Stock Analysis which considers also recent data from major rookeries in Libya and Turkey, and the generation of a standardized nomenclature of allele sizes at the microsatellite loci. The results indicate: that the north Adriatic, the Tunisian continental shelf, the waters around Malta and the Italian Ionian Sea represent important areas for the conservation of rookeries in Greece, Libya and Turkey, respectively; that waters off the Italian peninsula and the islands of Lampedusa and Malta are mainly inhabited by individuals of Mediterranean origin, with a major contribution from the nearest and largest colonies, while Atlantic turtles are restricted to the western areas; that specific migratory routes exist from rookeries to foraging grounds; a poor bi-parental genetic structuring, which suggests a high male-mediated gene flow in the Mediterranean; mixing of small turtles in waters distant from natal rookeries, and recovery of structuring for large-sized individuals; and that uncommon mtDNA haplotypes are more powerful markers than microsatellite alleles in assessing an individual's origin, owing to their higher geographic specificity. © 2013 John Wiley & Sons, Ltd

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Loggerhead turtles nesting in Libya: an important management unit for the Mediterranean stock

Cited by 30 publications

References 45 publications

Genetic stock composition of loggerhead turtles Caretta caretta bycaught in the pelagic waters of the North Atlantic

Genetic stock composition of loggerhead turtles Caretta caretta bycaught in the pelagic waters of the North Atlantic

Genetic composition of loggerhead turtle feeding aggregations: migration patterns in the North Pacific

Genetic characterization of central Mediterranean stocks of the loggerhead turtle (Caretta caretta) using mitochondrial and nuclear markers, and conservation implications

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