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Fine‐scale genetic structure derived from stocking black sea bream, Acanthopagrus schlegelii (Bleeker, 1854), in Hiroshima Bay, Japan
Author(s) -
Blanco Gonzalez E.,
Umino T.
Publication year - 2009
Publication title -
journal of applied ichthyology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 62
eISSN - 1439-0426
pISSN - 0175-8659
DOI - 10.1111/j.1439-0426.2009.01249.x
Subject(s) - stocking , biology , bay , fishery , pagrus , sparidae , population , fishing , genetic structure , ecology , genetic variation , fish <actinopterygii> , oceanography , demography , sociology , geology , biochemistry , gene
Summary Black sea bream ( Acanthopagrus schlegelii ) is an important commercial and sport fishing species inhabiting Hiroshima Bay, where an intensive stock enhancement program is carried out for this species. In order to clarify the fine‐scale genetic effects of the releases, black sea bream specimens were collected at five locations (Ninoshima, Atatajima, Miyajima, Oonasamijima and Kurahashi) in Hiroshima Bay. High homogeneity was observed among locations. The sample from Ninoshima, where stocking was most intense, presented the lowest number of alleles per locus (13.5) and showed significant differences in the pairwise F ST value compared to the fish at Atatajima, Miyajima and Oonasamijima, but not significantly different from those collected at Kurahashi. However, all differences disappeared once analysis was performed standardizing the age‐classes of all samples. The results suggest an important effect of the releases on genetic diversity of A. schlegelii in Hiroshima Bay. Moreover, the observed genetic population substructure is presumed to be related to the year‐class composition of the samples at each location.