Population structure of loggerhead turtle ( Carettacaretta ) nesting colonies in the Atlantic and Mediterranean as inferred from mitochondrial DNA control region sequences

Encalada, Sandra E.; Bjorndal, Karen A.; Bolten, AB; Zurita, Julio; Schroeder, Barbara A.; Possardt, E.; Sears, Christopher J.; Bowen, Brian W.

doi:10.1007/s002270050278

Cited by 130 publications

(120 citation statements)

References 38 publications

Supporting

Mentioning

114

Contrasting

Order By: Relevance

“…Interspecific distance established between COI gene sequences of the turtle Eretmochelys imbricata described in this study and COI sequences of sea turtles (GenBank) and tortoise by analyzing the Kimura-2-parameter distance model (K2P). ture, which means that the variations of the haplotype frequencies of the control region, or D-loop of mtDNA among nesting colonies of the same beach, is very low or nonexistent (Limpus et al, 1983, Bowen et al, 1993, Broderick et al, 1994Encalada et al, 1998;Maffucci et al, 2006), a fact which supports the hypothesis of natal homing (Bowen and Karl, 2007). This study identified 5 different haplotypes (Table 3) of the hawksbill turtle populations and found that 4 of these represent the first contribution to the Colombian Caribbean and were represented in 7 individuals.…”

Section: Discussionsupporting

confidence: 65%

Molecular identification and first report of mitochondrial COI gene haplotypes in the hawksbill turtle Eretmochelys imbricata (Testudines: Cheloniidae) in the Colombian Caribbean nesting colonies

Daza-Criado¹,

Fernández²

2014

Genet. Mol. Res.

View full text Add to dashboard Cite

ABSTRACT. Hawksbill sea turtles Eretmochelys imbricata are found extensively around the world, including the Atlantic, Pacific, and Indian Oceans; the Persian Gulf, and the Red and Mediterranean Seas. Populations of this species are affected by international trafficking of their shields, meat, and eggs, making it a critically endangered animal. We determined the haplotypes of 17 hawksbill foraging turtles of Islas del Rosario (Bolivar) and of the nesting beach Don Diego (Magdalena) in the Colombian Caribbean based on amplification and sequencing of the mitochondrial gene cytochrome oxidase c subunit I (COI). We identified 5 haplotypes, including EI-A1 previously reported in Puerto Rico, which was similar to 10 of the study samples. To our knowledge, the remaining 4 haplotypes have not been described. Samples EICOI11 and EICOI3 showed 0.2% divergence from EI-A1, by a single nucleotide change, and were classified as the EI-A2 haplotype. EICOI6, EICOI14, and EICOI12 samples showed 0.2% divergence from EI-A1 and 0.3% divergence from EI-A2 and were classified as EI-A3 haplotype. Samples EICOI16 and EICOI15 presented 5 nucleotide changes each and were classified as 2 different haplotypes, EI-A4 and EI-A5, respectively. The last 2 haplotypes had higher nucleotide diversity (K2P = 1.7%) than that by the first 3 haplotypes. EI-A1 and EI-A2 occurred in nesting individuals, and EI-A2, EI-A3, EI-A4, and EI-A5 occurred in foraging individuals. The description of the haplotypes may be associated with reproductive migrations or foraging and could support the hypothesis of natal homing. Furthermore, they can be used in phylogeographic studies.

show abstract

Section: Discussionsupporting

confidence: 65%

Molecular identification and first report of mitochondrial COI gene haplotypes in the hawksbill turtle Eretmochelys imbricata (Testudines: Cheloniidae) in the Colombian Caribbean nesting colonies

Daza-Criado¹,

Fernández²

2014

Genet. Mol. Res.

View full text Add to dashboard Cite

show abstract

“…NWA loggerhead nesting aggregations are composed of genetically and demographically distinct populations (Encalada et al 1998;Shamblin et al, in press). Loggerheads swim hundreds of kilometers from a wide range of foraging grounds to their nesting beaches.…”

Section: Introductionmentioning

confidence: 99%

Assignment of nesting loggerhead turtles to their foraging areas in the Northwest Atlantic using stable isotopes

et al. 2012

View full text Add to dashboard Cite

Abstract. Differential foraging area use can affect population demographics of highly migratory fauna because of differential environmental changes and anthropogenic threats among those areas. Thus, identification of foraging areas is vital for the development of effective management strategies for endangered migratory species. In this study, we assigned 375 loggerhead turtles (Caretta caretta) nesting at six locations along the east coast of the United States to their foraging areas in the Northwest Atlantic (NWA) using carbon and nitrogen stable isotope values (d 15N values characterized three geographic areas-with distinct abiotic and biotic features-used by adult loggerheads in the NWA. Discriminant analysis assigned all 375 female loggerheads to one of the three foraging areas; 91% were assigned with probabilities of !80%. The proportion of nesting turtles using each foraging ground varied geographically; most turtles nesting in northern beaches (72-80%) tend to forage at higher latitudes while most turtles nesting in southern beaches (46-81%) tend to forage at lower latitudes. Stable isotopes can reveal the foraging location of loggerhead turtles in the NWA, which will allow robust analyses of foraging ground effects on demography and improve the design of management strategies for the conservation of loggerhead populations. The conclusions and methods developed in this study are also relevant for other populations of sea turtles and for other highly migratory species.

show abstract

“…While North Atlantic and Mediterranean loggerhead turtles are a relatively well-studied systems in population genetics and connectivity research Encalada et al 1998;Laurent et al 1998;Bowen et al 2004Bowen et al , 2005Carreras et al 2006Carreras et al , 2007Lee 2008), key gaps in sampling still remain. The second largest nesting aggregation of the globally endangered loggerhead sea turtle (IUCN 2007) in the Atlantic Ocean is found at the Cape Verde Islands, which is also the only major rookery in Western Africa for this species.…”

Section: Introductionmentioning

confidence: 99%

Population structure and conservation implications for the loggerhead sea turtle of the Cape Verde Islands

et al. 2010

View full text Add to dashboard Cite

The Cape Verde Islands harbour the second largest nesting aggregation of the globally endangered loggerhead sea turtle in the Atlantic. To characterize the unknown genetic structure, connectivity, and demographic history of this population, we sequenced a segment of the mitochondrial (mt) DNA control region (380 bp, n = 186) and genotyped 12 microsatellite loci (n = 128) in females nesting at three islands of Cape Verde. No genetic differentiation in either haplotype or allele frequencies was found among the islands (mtDNA F ST = 0.001, P [ 0.02; nDNA F ST = 0.001, P [ 0.126). However, population pairwise comparisons of the mtDNA data revealed significant differences between Cape Verde and all previously sequenced Atlantic and Mediterranean rookeries (F ST = 0.745; P \ 0.000). Results of a mixed stock analysis of mtDNA data from 10 published oceanic feeding grounds showed that feeding grounds of the Madeira, Azores, and the Canary Islands, in the Atlantic Ocean, and Gimnesies, Pitiü ses, and Andalusia, in the Mediterranean sea, are feeding grounds used by turtles born in Cape Verde, but that about 43% (±19%) of Cape Verde juveniles disperse to unknown areas. In a subset of samples (n = 145) we evaluated the utility of a longer segment (*760 bp) amplified by recently designed mtDNA control region primers for assessing the genetic structure of Atlantic loggerhead turtles. The analysis of the longer

show abstract

Population structure of loggerhead turtle ( Carettacaretta ) nesting colonies in the Atlantic and Mediterranean as inferred from mitochondrial DNA control region sequences

Cited by 130 publications

References 38 publications

Molecular identification and first report of mitochondrial COI gene haplotypes in the hawksbill turtle Eretmochelys imbricata (Testudines: Cheloniidae) in the Colombian Caribbean nesting colonies

Molecular identification and first report of mitochondrial COI gene haplotypes in the hawksbill turtle Eretmochelys imbricata (Testudines: Cheloniidae) in the Colombian Caribbean nesting colonies

Assignment of nesting loggerhead turtles to their foraging areas in the Northwest Atlantic using stable isotopes

Population structure and conservation implications for the loggerhead sea turtle of the Cape Verde Islands

Contact Info

Product

Resources

About