Genetic Diversity and Natal Origins of Green Turtles (<i>Chelonia mydas</i>) in the Western Gulf of Mexico

Anderson, Joel D.; Shaver, Donna J.; Karel, William J.

doi:10.1670/12-031

Cited by 19 publications

(21 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The source populations of the Texas foraging aggregation remain unresolved. A recent MSA suggested northern Greater Caribbean origins, dominated by Florida contributions (Anderson et al, 2013). However, as highlighted by the authors of that study, the findings should be interpreted with caution for two important reasons.…”

Section: Introductionmentioning

confidence: 70%

Mexican origins for the Texas green turtle foraging aggregation: A cautionary tale of incomplete baselines and poor marker resolution

Shamblin

Dutton

Shaver

et al. 2017

Journal of Experimental Marine Biology and Ecology

Self Cite

View full text Add to dashboard Cite

The green turtle (Chelonia mydas) foraging aggregation along the Texas coast has increased dramatically in recent years, but the source populations for these turtles have not been adequately resolved. Previous mixed stock analysis (MSA) based on 490 base pair (bp) mitochondrial control region haplotypes suggested a large Florida contribution, but widespread sharing of common haplotypes among potential source populations and incomplete source population baseline data precluded precise assessment. To test the hypothesis that Texas turtles may represent proximal western Gulf of Mexico (GoM) nesting populations, we analyzed novel rookery samples from Rancho Nuevo, Tamaulipas, Mexico (RNMX) and conducted oceanic connectivity simulations. The RNMX samples yielded haplotypes CM-A1.1 and CM-A3.1 in frequencies not significantly different from those of the central eastern Florida nesting population. However, mitogenomic sequencing identified a diagnostic mitochondrial SNP (mtSNP) variant that is fixed in RNMX relative to the Florida CM-A1.1 lineage. Pairwise comparisons indicate that the Tamaulipas rookery represents a discrete population relative to those previously described in the northern Greater Caribbean, warranting recognition of a western GoM management unit (MU). Contrary to previous findings, the Florida populations were ruled out as major contributors to the Texas aggregation through screening of the mtSNP. Mixed stock analysis incorporating the mtSNP data suggested a western GoM origin for approximately 70% of the Texas foraging aggregation, with Quintana Roo contributing the majority of the remainder. Backtracking

show abstract

Section: Introductionmentioning

confidence: 70%

Mexican origins for the Texas green turtle foraging aggregation: A cautionary tale of incomplete baselines and poor marker resolution

Shamblin

Dutton

Shaver

et al. 2017

Journal of Experimental Marine Biology and Ecology

Self Cite

View full text Add to dashboard Cite

show abstract

“…CM-A13 is the dominant Mediterranean haplotype, and was detected among foraging juveniles in the Greater Caribbean region. This introduced the possibility of dispersal from the Mediterranean into the western Atlantic (Bjorndal and Bolten, 2008;Anderson et al, 2013). However, this haplotype was later found to occur at low frequency in the Florida nesting aggregation (Shamblin et al, 2015a).…”

Section: Green Turtle Habitat Connectivity: Which Nesting Stocks Use mentioning

confidence: 99%

“…In a second example, in the northern Greater Caribbean region, CM-A1 and CM-A3 are the dominant haplotypes shared among the rookeries of Quintana Roo, Mexico; Guanahacabibes Peninsula, Cuba; and Florida rookeries (Encalada et al, 1996;Ruiz-Urquiola et al, 2010;Shamblin et al, 2015a). An MSA of juvenile green turtles in Texas foraging grounds suggested a large Florida rookery contribution based on the presence of these haplotypes at high frequencies (Anderson et al, 2013). Yet later analysis of the green turtle rookery at Rancho Nuevo, Tamaulipas, Mexico found CM-A1 and CM-A3 in the same frequencies as the central Florida MU, so the source of the majority of juveniles foraging in Texas remained unresolved using standard markers (Shamblin et al, 2015a(Shamblin et al, , 2017.…”

Section: Green Turtle Habitat Connectivity: Which Nesting Stocks Use mentioning

confidence: 99%

Advances in the Application of Genetics in Marine Turtle Biology and Conservation

et al. 2017

View full text Add to dashboard Cite

Marine turtles migrate across long distances, exhibit complex life histories, and occupy habitats that are difficult to observe. These factors present substantial challenges to understanding fundamental aspects of their biology or assessing human impacts, many of which are important for the effective conservation of these threatened and endangered species. The early development and application of genetic tools made important contributions to understanding marine turtle population and evolutionary biology, such as providing evidence of regional natal homing by breeding adults, establishing connectivity between rookeries and foraging habitats, and determining phylogeography and broad scale stock structure for most marine turtle species. Recent innovations in molecular technologies, statistical methods, and creative application of genetic tools have significantly built upon this knowledge to address key questions in marine turtle biology and conservation management. Here, we evaluate the latest major advances and potential of marine turtle genetic applications, including improved resolution and large-scale syntheses of population structure, connectivity and phylogeography, estimation of key demographic rates such as age to maturity and operational or breeding sex ratios, insight into reproductive strategies and behavior, and assessment of differential human impacts among populations. We then discuss remaining challenges and emerging capabilities, such as rapid, multiplexed genotyping, and investigation of the genomic underpinnings of adaptive variation afforded by high-throughput sequencing technologies.

show abstract

“…Nesting populations: EcFL and SFL: Florida, USA (Shamblin et al, 2014); CUB: southwest Cuba (Ruiz-Urquiola et al, 2010); MEX: Quintana Roo, Mexico (Encalada et al, 1996); CR: Tortuguero, Costa Rica (Bjorndal et al, 2005b;Encalada et al, 1996); SUR: Matapica and Galibi, Suriname (Encalada et al, 1996;Shamblin et al, 2012); AV: Aves Island (Lahanas et al, 1998(Lahanas et al, , 1994Shamblin et al, 2012), Venezuela; BUC: Buck Island (Shamblin et al, 2012); RC/FN: Rocas Atoll and Fernando Noronha (Bjorndal et al, 2006;Encalada et al, 1996), Brazil; ASC: Ascension Island (Encalada et al, 1996;Formia et al, 2007); TRI: Trindade Island, Brazil (Bjorndal et al, 2006); GB: Poilão, Guinea-Bissau (Patrício et al, 2017); BIO: Bioko Island, Equatorial Guinea ; STP: Sao Tome and Principe . Foraging grounds: NC: North Carolina (Bass et al, 2006), HI: Hutchinson Island, Florida (Bass & Witzell, 2000), DT+EP: Dry Tortugas + Everglades Park, Florida (Naro-Maciel et al, 2016), SJ: St. Joseph Bay, Florida (Foley et al, 2007), TEX: Texas (Anderson et al, 2013), USA; BHM: Bahamas (Lahanas et al, 1998), CUL: Culebra, Puerto Rico (this study), BRB: Barbados (Luke et al, 2004), ALF: Almofala, Brazil (Naro-Maciel et al, 2007), RC: Rocas Atoll, Brazil ), FN: Fernando Noronha, Brazil (Naro-Maciel et al, 2012, BA: Bahia, Brazil , ES: Espirito Santo, Brazil , UB: Ubatuba, Brazil (Naro-Maciel et al, 2007), AI: Arvoredo Island, Brazil (Proietti et al, 2012), CB: Cassino Beach, Brazil (Proietti et al, 2012), BuA, Buenos Aires, Argentina (Prosdocimi et al, 2012), CV: Cape Verde (Monzón-Argüello et al, 2010).…”

Section: Mixed Stock Analysis (Msa)mentioning

confidence: 99%

“…Some of these nesting populations have been recovering over the past decades, following protection from human hazards (e.g., Tortuguero in Costa Rica, Archie Carr Refuge in Florida, Aves Island in Venezuela, Chaloupka et al, 2008, García-Cruz et al, 2015, which consequently should be reflected in the recruitment to juvenile aggregations. MSAs have looked into the origin of foraging grounds in Florida (East Central Florida, Hutchinson Island, St. Joseph Bay and Dry Tortugas and Everglade), Texas, the Bahamas, Barbados, and Nicaragua (Bass & Witzell, 2000;Foley et al, 2007;Naro-Maciel et al, 2012;Proietti et al, 2012;Prosdocimi et al, 2012;Anderson et al, 2013;NaroMaciel et al, 2016). Developmental foraging habitats are further known from several other areas (e.g., Belize, Bonaire, British and American Virgin Islands, Puerto Rico, St Kitts and Nevis), but they remain genetically uncharacterized.…”

Section: Introductionmentioning

confidence: 99%

Genetic composition and origin of juvenile green turtles foraging at Culebra, Puerto Rico, as revealed by mtDNA

Patrício

Vélez‐Zuazo

Dam³

et al. 2017

lajar

View full text Add to dashboard Cite

ABSTRACT. Marine migratory species encounter a range of threats as they move through coastal and oceanic zones. Understanding the connectivity and dispersal patterns of such species is critical to their effective conservation. Here we analyzed the temporal genetic composition and the most likely origin of juvenile green turtles foraging at Puerto Manglar and Tortuga Bay, Culebra, Puerto Rico, using mitochondrial DNA control region sequences. We identified 17 haplotypes, of which CM-A3 (51.5%), CM-A5 (19.4%) and CM-A1 (13.6%) were the most common. Haplotype (h) and nucleotide (π) diversities were 0.680 and 0.008, respectively. There was no evidence of significant variation in the genetic composition of these aggregations throughout seven years (2000)(2001)(2002)(2003)(2004)(2005)(2006), suggesting that relative contributions from source populations did not significantly change during this period. Mixed Stock Analysis (MSA), incorporating 14 Atlantic nesting populations as possible sources, indicated four main contributing stocks to the Culebra foraging grounds: Costa Rica (34.9%), Mexico (29.2%), East Central Florida (13.2%), and Suriname (12.0%). The regional pattern of connectivity among Wider Caribbean rookeries and Culebra was further evidenced by a second MSA using Atlantic Regional Management Units (RMUs) as sources, with 94.1% of the mixed stock attributed to this area. This study addresses the information gap on the connectivity of the green turtle in the North Atlantic, and establishes an important baseline that can be used to determine future changes in stock composition.

show abstract

Genetic Diversity and Natal Origins of Green Turtles (Chelonia mydas) in the Western Gulf of Mexico

Cited by 19 publications

References 30 publications

Mexican origins for the Texas green turtle foraging aggregation: A cautionary tale of incomplete baselines and poor marker resolution

Mexican origins for the Texas green turtle foraging aggregation: A cautionary tale of incomplete baselines and poor marker resolution

Advances in the Application of Genetics in Marine Turtle Biology and Conservation

Genetic composition and origin of juvenile green turtles foraging at Culebra, Puerto Rico, as revealed by mtDNA

Contact Info

Product

Resources

About