TY - JOUR
T1 - Strong population structure and shallow mitochondrial phylogeny in the banded guitarfish, Zapteryx exasperata (Jordan y Gilbert, 1880), from the northern mexican pacific
AU - Castillo-Páez, Ana
AU - Sosa-Nishizaki, Oscar
AU - Sandoval-Castillo, Jonathan
AU - Galván-Magaña, Felipe
AU - Blanco-Parra, María Del Pilar
AU - Rocha-Olivares, Axayácatl
N1 - Funding Information:
Centro de Investigación Científica y de Education Superior de Ensenada (no. 625112) grant to A.R.O.; a postgraduate scholarship (no. 237074) from the Consejo Nacional de Ciencia y Tecnología (CONACYT) provided support to A.C.P. during her M.Sc. program in Marine Ecology at Centro de Investigación Científica y de Education Superior de Ensenada.
PY - 2014/1
Y1 - 2014/1
N2 - The northern Mexican Pacific (NMP), the Gulf of California (GC), and Baja California have been recognized as an ecological and evolutionarily dynamic region having experienced significant tectonic and climatic changes leading to the diversification of terrestrial and marine biotas. Zapteryx exasperata is a predominant ray caught in the artisanal fisheries of the NMP. Morphometric and reproductive differences between rays from the GC and the Pacific coast of Baja California (PCBC) regions suggest the presence of distinct populations. We investigate whether this distinction correlates with differences in genetic diversity and differentiation using sequences of the mitochondrial nicotinamide adenine dinucleotide dehydrogenase subunit 2 (ND2) gene and the noncoding control region (CR) in 63 specimens. Contrary to our expectations, ND2 bore significantly more diversity (h = 0.76) than CR (h = 0.39). Geographic patterns of diversity of CR were opposite to those of ND2, with GC being significantly less (ND2) and more (CR) diverse than PCBC. The diversity of concatenated haplotypes was high (h = 0.84). Low nucleotide diversity suggests the recent coancestry of haplotypes. Marked genetic structure (Φst = 0.23, P < 0.0001) revealed the existence of reproductive isolation and limited matrilineal gene flow between GC and PCBC, which correlates with their phenotypic distinction. These results suggest the influence of factors such as female reproductive philopatry, and ecological or historical vicariant barriers to gene flow. Our results point to the existence of a distinct management unit of banded guitarfish in each region, and add to the increasing evidence attesting to the diversifying nature of this evolutionarily dynamic region.
AB - The northern Mexican Pacific (NMP), the Gulf of California (GC), and Baja California have been recognized as an ecological and evolutionarily dynamic region having experienced significant tectonic and climatic changes leading to the diversification of terrestrial and marine biotas. Zapteryx exasperata is a predominant ray caught in the artisanal fisheries of the NMP. Morphometric and reproductive differences between rays from the GC and the Pacific coast of Baja California (PCBC) regions suggest the presence of distinct populations. We investigate whether this distinction correlates with differences in genetic diversity and differentiation using sequences of the mitochondrial nicotinamide adenine dinucleotide dehydrogenase subunit 2 (ND2) gene and the noncoding control region (CR) in 63 specimens. Contrary to our expectations, ND2 bore significantly more diversity (h = 0.76) than CR (h = 0.39). Geographic patterns of diversity of CR were opposite to those of ND2, with GC being significantly less (ND2) and more (CR) diverse than PCBC. The diversity of concatenated haplotypes was high (h = 0.84). Low nucleotide diversity suggests the recent coancestry of haplotypes. Marked genetic structure (Φst = 0.23, P < 0.0001) revealed the existence of reproductive isolation and limited matrilineal gene flow between GC and PCBC, which correlates with their phenotypic distinction. These results suggest the influence of factors such as female reproductive philopatry, and ecological or historical vicariant barriers to gene flow. Our results point to the existence of a distinct management unit of banded guitarfish in each region, and add to the increasing evidence attesting to the diversifying nature of this evolutionarily dynamic region.
KW - Baja California
KW - Elasmobranch
KW - Genetic diversity
KW - Gulf of California
KW - mitochondrial DNA
UR - http://www.scopus.com/inward/record.url?scp=84890518598&partnerID=8YFLogxK
U2 - 10.1093/jhered/est067
DO - 10.1093/jhered/est067
M3 - Artículo
SN - 0022-1503
VL - 105
SP - 91
EP - 100
JO - Journal of Heredity
JF - Journal of Heredity
IS - 1
ER -