期刊
JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY
卷 438, 期 -, 页码 32-40出版社
ELSEVIER
DOI: 10.1016/j.jembe.2012.09.010
关键词
Conservation; Fishery; Himantura gerrardi; Indo-Malay-Papua archipelago; Population genetic structure; Taeniura lymna
资金
- BEST program of Agence inter-organismes de recherche pour le developpement (AIRD), France
- AIRD
- IRD
- ISE-M
- LIPI-P2O
Exon-primed, intron crossing DNA markers (EPICS) were screened for Mendelian-like allele size polymorphisms in three stingray species (Himantura gerrardi, Neotrygon kuhlii and Taeniura lymna) from the central Indo-West Pacific, where they are commercially exploited. Four to 7 size-polymorphic intron loci were selected in a species, and were subsequently tested as genetic markers of stock structure. Sharp genetic differentiation was observed between populations within each species across the Indo-Malay-Papua archipelago (Weir and Cockerham's (theta) over bar -values reaching 0.153-0.557 over a few thousand kilometers). A trend of increasing genetic differentiation with increasing geographic distance was apparent in N. kuhlii, in which populations distant by 3000 km were differentiated by an estimated (theta) over bar -0.375. This value was an order of magnitude higher than usually reported in coastal benthic teleost fishes and indicates strong sub-population structure. This is likely, at least partly, a consequence of the sedentary benthic habits of N. kuhlii at all life stages. Because replenishment of overexploited populations of N. kuhlii and two other stingray species from the central Indo-West Pacific is unlikely at ecological timescales, management should be planned at the local geographic scale. (c) 2012 Elsevier B.V. All rights reserved.
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