Genetic analysis of sympatric morphotypes of common dolphins (genus Delphinus)

Rosel, Patricia E.; Dizon, Andrew E.; Heyning, John E.

doi:10.1007/bf00349552

Cited by 193 publications

(200 citation statements)

References 15 publications

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“…Inbreeding coefficients (F ST and ϕ ST ), haplotype diversity (h), nucleotide diversity (π), Nei's pairwise genetic distance, Tajima's D and Fu's F s neutrality tests were estimated using ARLEQUIN 2.0 (Schneider et al, 2000). Comparisons against database mtDNA sequences were for 277 bp overlapping sequence (within the hypervariable region 1 (HVR1)) for samples from the Pacific Ocean (Rosel et al, 1994), South Australia and Tasmania (Bilgmann et al, 2008), North Atlantic, South Africa and Argentina (Natoli et al, 2006), applying the Kimura 2-parameter model for ϕ ST analysis (closest option available in ARLEQUIN to the transition model suggested in MODELTEST).…”

Section: Discussionmentioning

confidence: 99%

“…Analyses of mitochondrial DNA (mtDNA) and nuclear amplified fragment length polymorphism markers supported the distinction between morphotypes in the ENP (Rosel et al, 1994;Kingston and Rosel, 2004;Kingston et al, 2009). However, independent studies comparing populations elsewhere could not find support for two genetic lineages representing distinguishable 'long-beaked' and 'shortbeaked' species worldwide based on 199 samples analyzed for microsatellite DNA and mtDNA control region sequences (Natoli et al, 2006), mtDNA cytochrome b (cytb) sequences for 343 samples and nuclear sequence data at 5 loci for 90 samples (Amaral et al, 2012) and mtDNA cytb sequences for an additional 37 samples (Cunha et al, 2015).…”

Section: Introductionmentioning

confidence: 92%

“…However, the occurrence and description of long-beaked common dolphins elsewhere (for example, D. capensis, Gray, 1828) led to the synonymy of D. bairdii and D. capensis (Van Bree and Purves, 1972). Later, morphological and, for populations in the Eastern North Pacific (ENP), genetic differences reinforced the recognition of D. capensis as a distinct 'long-beaked' species in the genus Delphinus (Heyning and Perrin, 1994;Rosel et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

“…It is in the ENP among the populations of these two forms where genetic differentiation is most pronounced (Rosel et al, 1994;Natoli et al, 2006;Amaral et al, 2012). We focused on this region using robust sample sets and both nuclear and mtDNA markers to better understand the mechanisms that may be supporting incipient speciation and to assess the timing and pattern of differentiation within this genus.…”

Section: Introductionmentioning

confidence: 99%

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Post-glacial habitat release and incipient speciation in the genus Delphinus

et al. 2016

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The role of ecological and changing environmental factors in the radiation of species diversity is a fundamental question in evolutionary biology. Of particular interest is the potential for these factors to determine the boundary between what we would consider differentiation among populations and incipient speciation. Dolphins in the genus Delphinus provide a useful test case, exhibiting morphological variation in beak length, coloration and body size across their wide geographic distribution, and in particular among coastal and more pelagic habitats. Two species have been proposed, D. delphis and D. capensis, but morphologically similar allopatric populations are not monophyletic, indicating that the mostly coastal 'long-beaked' D. capensis form is not a single globally distributed species. However, the sympatric populations in the Eastern North Pacific currently designated as these two species are both morphologically and genetically differentiated. Here we use microsatellite DNA and mitochondrial DNA markers to investigate the evolutionary mechanisms that led to this incipient speciation event. We used coalescent and assignment methods to investigate the timing and extent of reproductive isolation. Our data indicate that although there is some level of on-going gene flow, the putative species found in the Eastern North Pacific are reciprocally monophyletic. The timing of isolation appears to be associated with regional changes in paleoceanographic conditions within the Holocene timeframe.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Post-glacial habitat release and incipient speciation in the genus Delphinus

et al. 2016

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“…Printed in Brazil www.sbg.org.br SRY593 and SRY764 primers (Palsbøll et al 1992), and the PCR products mixed before electrophoresis in 2% (w/v) agarose gels. Two positive controls were used for sexing the dolphins with the Sry system: (1) PCR amplification of the mitochondrial control region, as described by Palsbøll et al (1992), using the primers Dlp 1.5 (modified from Pichler et al, 1998) and H00034 (Rosel et al, 1994); (2) amplification of the Zfx or Zfy band in the sample. Negative controls were included in all experiments.…”

mentioning

confidence: 99%

Molecular sexing of tucuxi dolphins (Sotalia guianensis and Sotalia fluviatilis) using samples from biopsy darting and decomposed carcasses

Cunha

Solé‐Cava

2007

Genet. Mol. Biol.

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We tested the zinc-finger sex chromosome-linked genes Zfx/Zfy and the sex-determining region Y (Sry) genes for gender determination of biopsy samples from marine and riverine tucuxi dolphins (Sotalia guianensis and S. fluviatilis). We also evaluated the performance of these genes with decomposed carcasses, for which sexing cannot rely on the direct examination of the reproductive tract. Both systems proved reliable for sexing 46 fresh and decomposed samples, making them especially useful when biopsy darting is coupled with photo-identification studies.

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Population structure of short‐finned pilot whales in the oceanic archipelago of Madeira based on photo‐identification and genetic analyses: implications for conservation

Alves

Quérouil

Dinis

et al. 2013

Aquatic Conservation

118

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1. Pilot whales Globicephala spp. are known to display a hierarchical social pattern, but longitudinal data to infer population structure of short-finned pilot whales Globicephala macrorhynchus are rare.2. Using data collected between 2003-2011 in the oceanic archipelago of Madeira, the grouping structure of short-finned pilot whales was studied using photo-identification methods and mtDNA sequences and microsatellite markers to test the hypotheses that (1) there is at least one pelagic and one or more island-associated communities, and (2) groups are made of related individuals, with a matrilineal social structure.3. Pilot whales demonstrated a large degree of variability in site fidelity, including residents (up to 14-year interval), regular visitors and transients. The social and temporal analyses revealed a well-differentiated society with long-lasting relationships (of years). The genetic analyses suggested that individuals of the three residency patterns may not be genetically isolated, and that small groups are made up of related individuals, suggesting some degree of social philopatry, while large groups are probably temporary associations of smaller groups.4. It is proposed that the pilot whales encountered in Madeira belong to a single population encompassing several clans, possibly three clans of island-associated whales and others of transients, each containing two to three matrilineal pods, each with a mean of 15 individuals (SD=9,. We suggest that the clans interact for mating purposes when they meet.5. For management decisions, it is considered that the island-associated whales should not be regarded as demographically independent populations, but instead as stable social entities to be included in governmental management plans and requiring periodic evaluation of their status. The high proportion of marked individuals and low rate of mark change encourages further research in this species.

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Genetic analysis of sympatric morphotypes of common dolphins (genus Delphinus)

Cited by 193 publications

References 15 publications

Post-glacial habitat release and incipient speciation in the genus Delphinus

Post-glacial habitat release and incipient speciation in the genus Delphinus

Molecular sexing of tucuxi dolphins (Sotalia guianensis and Sotalia fluviatilis) using samples from biopsy darting and decomposed carcasses

Population structure of short‐finned pilot whales in the oceanic archipelago of Madeira based on photo‐identification and genetic analyses: implications for conservation

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