An Initial Population Structure and Genetic Diversity Analysis for Stenella clymene (Gray, 1850): Evidence of Differentiation Between the North and South Atlantic Ocean

Nara, Luana; Meirelles, Ana Carolina Oliveira de; Souto, Luciano Raimundo Alardo; Silva-Jr, José Martins; Farro, Ana Paula Cazerta

doi:10.1578/am.43.5.2017.507

Cited by 5 publications

(6 citation statements)

References 24 publications

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“…Other delphinids have also shown a similar pattern of isolation in the WSA, such as the clymene dolphin (Stenella clymene) (Nara et al 2017), Delphinus sp. (Amaral et al 2012b), the Guiana dolphin (Sotalia guianensis) (Caballero et al 2018) and the rough-toothed dolphin (Steno bredanensis) (da Silva et al 2015).…”

Section: Genetic Structure: Western South Atlanticmentioning

confidence: 85%

Seascape Genetics of the Atlantic Spotted Dolphin (Stenella frontalis) Based on Mitochondrial DNA

Amaral

Barragán‐Barrera

Mesa-Gutiérrez

et al. 2021

Journal of Heredity

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The Atlantic spotted dolphin (Stenella frontalis) is endemic to tropical, subtropical, and warm temperate waters of the Atlantic Ocean. Throughout its distribution, both geographic distance and environmental variation may contribute to population structure of the species. In this study we follow a seascape genetics approach to investigate population differentiation of Atlantic spotted dolphins based on a large worldwide dataset and the relationship with marine environmental variables. The results revealed that the Atlantic spotted dolphin exhibits population genetic structure across its distribution based on mitochondrial DNA control region (mtDNA-CR) data. Analyses based on the contemporary landscape suggested, at both the individual and population-level, that the population genetic structure is consistent with the isolation-by-distance model. However, because geography and environmental matrices were correlated, and because in some, but not all analyses, we found a significant effect for the environment, we cannot rule out the addition contribution of environmental factors in structuring genetic variation. Future analyses based on nuclear data are needed to evaluate whether local processes, such as social structure and some level of philopatry within populations, may be contributing to the associations among genetic structure, geographic, and environmental distance.

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Section: Genetic Structure: Western South Atlanticmentioning

confidence: 85%

Seascape Genetics of the Atlantic Spotted Dolphin (Stenella frontalis) Based on Mitochondrial DNA

Amaral

Barragán‐Barrera

Mesa-Gutiérrez

et al. 2021

Journal of Heredity

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“…longirostris [ 1 , 64 , 65 ] and for S . clymene in the Atlantic Ocean [ 2 ], no strong phylogeographic signal was detected at the ocean basin level for the Stenella species analysed here.…”

Section: Discussionmentioning

confidence: 99%

“…longisrotris in the Fernando de Noronha archipelago of Brazil (h = 0.374; π = 0.044) [ 1 ] while high levels were found for S . clymene (h = 1.00; π = 0.02) [ 2 ], and for S . frontalis (h = 1.00; π = 0.027) [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Mitochondrial diversity and inter-specific phylogeny among dolphins of the genus Stenella in the Southwest Atlantic Ocean

et al. 2022

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The genus Stenella is comprised of five species occurring in all oceans. Despite its wide distribution, genetic diversity information on these species is still scarce especially in the Southwest Atlantic Ocean. Some features of this genus can enhance opportunities for potential introgressive hybridization, e.g. sympatric distibution along the Brazilian coast, mixed known associations among species, karyotype uniformity and genome permeability. In this study we analyzed three genes of the mitochondrial genome to investigate the genetic diversity and occurrence of genetic mixture among eighty specimens of Stenella. All species exhibited moderate to high levels of genetic diversity (h = 0.833 to h = 1.000 and π = 0.006 to π = 0.015). Specimens of S. longirostris, S. attenuata and S. frontalis were clustered into differentiated haplogroups, in contrast, haplotypes of S. coeruleoalba and S. clymene were clustered together. We detected phylogenetic structure of mixed clades for S. clymene and S. coeruleoalba specimens, in the Southwest Atlantic Ocean, and also between S. frontalis and S. attenuata in the Northeast Atlantic Ocean, and between S. frontalis and S. longirostris in the Northwest Atlantic Ocean. These specimes were morphologically identified as one species but exhibited the maternal lineage of another species, by mitochondrial DNA. Our results demonstrate that ongoing gene flow is occurring among species of the genus Stenella reinforcing that this process could be one of the reasons for the confusing taxonomy and difficulties in elucidating phylogenetic relationships within this group.

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“…Our designed primers for dolphins generated two identical cytb sequences (918 nt) from two isolates of parasitic nematodes collected from the Clymene dolphin. BLAST search showed 100% identity with 97% query cover with an isolate of S. clymene from Brazil (KX346591) of Nara et al (2017).…”

Section: Biological Data Molecular Identification and Prey Speciesmentioning

confidence: 99%

A Visitor of Tropical Waters: First Record of a Clymene Dolphin (Stenella clymene) Off the Patagonian Coast of Argentina, With Comments on Diet and Metazoan Parasites

et al. 2021

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The poorly known Clymene dolphin (Stenella clymene) is a small oceanic cetacean distributed in tropical and subtropical waters of the Atlantic Ocean. In this study, we report, for the first time, a vagrant individual of Clymene dolphin in Argentina (Rada Tilly) that represents the current southern-most record for this cetacean species. We provide a molecular identification of the dolphin, based on partial sequences of the mitochondrial cytochrome b gene, generated from DNA extracted from its metazoan parasites. Three prey species, namely Argentine hake, Patagonian squid and lobster krill were identified from hard pieces collected in the stomach. Seven metazoan parasite taxa (three in adult stage, one immature stage and three in larval stage) were identified using morphological and molecular data, i.e., the digenean Pholeter gastrophilus (new host record), the cestodes Tetrabothrius (Tetrabothrius) forsteri, Clistobothrium grimaldii unidentified phyllobothriid plerocercoids, the nematodes Anisakis pegreffii (new host record), Halocercus delphini and the acanthocephalan Corynosoma australe (new host record). Our study provides the first molecular exploration of the metazoan parasite diversity in delphinids from the southwestern Atlantic, and contributes significantly to understand the poorly known parasite fauna of the Clymene dolphin.

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An Initial Population Structure and Genetic Diversity Analysis for Stenella clymene (Gray, 1850): Evidence of Differentiation Between the North and South Atlantic Ocean

Cited by 5 publications

References 24 publications

Seascape Genetics of the Atlantic Spotted Dolphin (Stenella frontalis) Based on Mitochondrial DNA

Seascape Genetics of the Atlantic Spotted Dolphin (Stenella frontalis) Based on Mitochondrial DNA

Mitochondrial diversity and inter-specific phylogeny among dolphins of the genus Stenella in the Southwest Atlantic Ocean

A Visitor of Tropical Waters: First Record of a Clymene Dolphin (Stenella clymene) Off the Patagonian Coast of Argentina, With Comments on Diet and Metazoan Parasites

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