Cryptic isolation of Gulf of California shovelnose guitarfish evidenced by mitochondrial DNA

Sandoval‐Castillo, Jonathan; Rocha‐Olivares, Axayácatl; Villavicencio-Garayzar, Carlos; Balart, Eduardo F.

doi:10.1007/s00227-004-1378-7

Cited by 67 publications

(54 citation statements)

References 34 publications

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“…Significant differences between the three species were also observed in the nucleotide composition of the D-loop, with divergences of 1.3% found between R. terraenovae and R. porosus, 2.2% between R. terraenovae and R. lalandii and 3.5% between R. porosus and R. lalandii. The rates of divergence of the mitochondrial DNA D-loop of the genus Rhizoprionodon were similar to those found among species of the genus Rhinobatos (2.5%) rated by Sandoval-Castillo et al (2004); slightly lower than the rates found among cryptic species of hammerhead sharks, Sphyrna spp. (5.3%) reported by Quattro et al (2006); and also slightly lower than the indices found by Corrigan et al (2008) between species of the genus Chiloscyllium (4.8%).…”

Section: Discussionsupporting

confidence: 72%

“…Also known as D-loop, the control region is the most rapidly evolving region of mtDNA (Hoelzel et al 1991;Lopez et al 1997) and it is one of the most commonly used markers for addressing evolutionary relationships of closely related species and/or subspecies (Meyer et al 1990;Rocha-Olivares et al 1999;Murgra et al 2002). The D-loop also proved effective in the characterization of shark species (Corrigan et al 2008;Quattro et al 2006;Sandoval-Castillo et al 2004). …”

Section: Introductionmentioning

confidence: 99%

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Species delimitation in sharpnose sharks (genus Rhizoprionodon) in the western Atlantic Ocean using mitochondrial DNA

et al. 2010

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Despite Springer's (1964) revision of the sharpnose sharks (genus Rhizoprionodon), the taxonomic definition and ranges of Rhizoprionodon in the western Atlantic Ocean remains problematic. In particular, the distinction between Rhizoprionodon terraenovae and R. porosus, and the occurrence of R. terraenovae in South American waters are unresolved issues involving common and ecologically important species in need of fishery management in Caribbean and southwest Atlantic waters. In recent years, molecular markers have been used as efficient tools for the detection of cryptic species and to address controversial taxonomic issues. In this study 415 samples of the genus Rhizoprionodon captured in the western Atlantic Ocean from Florida to southern Brazil were examined for sequences of the COI gene and the D-loop and evaluated for nucleotide differences. The results on nucleotide composition, AMOVA tests, and relationship distances using Bayesian-likelihood method and haplotypes network, corroborates Springer's (1964) morphometric and meristic finding and provide strong evidence that supports consideration of R. terraenovae and R. porosus as distinct species.

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Section: Discussionsupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Species delimitation in sharpnose sharks (genus Rhizoprionodon) in the western Atlantic Ocean using mitochondrial DNA

et al. 2010

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“…In congeneric species such as the shovelnose guitarfish Rhinobatos productus, Sandoval-Castillo et al (2004) found geographic variations in the maximum size and the size at the first maturity stage; they also observed very significant levels of genetic differentiation between populations from the Gulf of California and Baja California on the Pacific coast. These authors suggested the existence of cryptic isolation within the continuous distribution of R. productus from the Pacific coast to the gulf.…”

Section: Discussionmentioning

confidence: 97%

Reproductive biology of the guitarfish Rhinobatos hynnicephalus (Batoidea: Rhinobatidae) in Ariake Bay, Japan

et al. 2009

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“…These studies have revealed population structure in only some of the species investigated. Furthermore, only the minority of studies have sited barriers with potential to influence H. ingens, while most have attributed population structure to past vicariance only influential to species with more temperate distributions than H. ingens (Bernardi et al 2003;Riginos 2005;Sandoval-Castillo et al 2004), or to ecological barriers (Pfeiler et al 2008) only influential to species with more specialized habitat needs than H. ingens. Thus, the only published barriers with potential to influence H. ingens include geographic distance coupled with low dispersal ability (Craig et al 2006;Riginos and Nachman 2001), and contemporary oceanographic barriers (Bernardi et al 2003;Selkoe et al 2007;Terry et al 2000).…”

Section: Introductionmentioning

confidence: 99%

Genetic differentiation across eastern Pacific oceanographic barriers in the threatened seahorse Hippocampus ingens

2010

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Understanding the population structure and evolutionary history of the eastern Pacific seahorse Hippocampus ingens is critical for the effective management of this threatened species. Life history characteristics of H. ingens (site fidelity and brooding of young) may limit gene flow and lead to population differentiation. A recent study analyzing conserved fragments of the mitochondrial cyt b and control region found no population structure. We re-assess this conclusion with a phylogeographic analysis of relationships among 115 individuals of H. ingens over a broader geographic range (San Diego Bay in California, Gulf of California, Central America, Ecuador, and Peru) based on a more variable 428 base pair fragment of the control region. This expanded analysis affirms low overall nucleotide diversity relative to other seahorses (h p = 0.004), and shows evidence of a recent bottleneck and population expansion since the middle Pleistocene. AMOVA analysis shows moderate overall population structure (U ST = 0.10, P val = 0.00), and pairwise U ST estimates indicate structure between the Gulf of California and all Pacific coast localities. Knowledge of population structure in H. ingens may improve conservation efforts by identifying evolutionarily important management units, and could determine source regions in the continuing trade of seahorses for traditional Chinese medicine. The level of genetic divergence observed between the Gulf of California and all other localities sampled may distinguish the Gulf as a separate management unit. Additional phylogeographic research with more quickly evolving genetic markers and targeted sampling at the mouth of the Gulf of California is warranted to inform strategies for conservation of this threatened seahorse.

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Cryptic isolation of Gulf of California shovelnose guitarfish evidenced by mitochondrial DNA

Cited by 67 publications

References 34 publications

Species delimitation in sharpnose sharks (genus Rhizoprionodon) in the western Atlantic Ocean using mitochondrial DNA

Species delimitation in sharpnose sharks (genus Rhizoprionodon) in the western Atlantic Ocean using mitochondrial DNA

Reproductive biology of the guitarfish Rhinobatos hynnicephalus (Batoidea: Rhinobatidae) in Ariake Bay, Japan

Genetic differentiation across eastern Pacific oceanographic barriers in the threatened seahorse Hippocampus ingens

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