期刊
AQUATIC BIOLOGY
卷 3, 期 1, 页码 71-78出版社
INTER-RESEARCH
DOI: 10.3354/ab00068
关键词
mitochondrial DNA; cytochrome c oxidase; COI; CoxI; identification; Zeus faber; Lepidopus caudatus; cryptic species
资金
- EC [MEIF-CT-2005-024966]
- Ontario Genomics Institute
Fifteen fish species, totalling 149 specimens, were cytochrome c oxidase I sequenced-barcoded-from Northern (Atlantic and Mediterranean) and Southern (Australasian) Hemisphere waters. Thirteen species showed no significant evidence of spatial genetic differentiation for this gene, although small sample sizes reduced statistical power. For marine fish, barcodes collected in one part of a species range are likely to be useful as identifiers in all other parts of its range. Two species did show striking north-south differentiation, with F-ST values of 0.84 and 0.96 (both p << 0.001). One of these, the silver scabbardfish Lepidopus caudatus, showed 2.75% genetic distance between northern and southern clades. The other, John dory Zeus faber, showed 7.44% differentiation between northern and southern clades. All specimens of these 2 species fell correctly into the northern or southern clade. We suggest that both taxa conceal a currently unrecognised, cryptic species, and recommend further taxonomic and genetic investigation.
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