Camper J D, Barber R C, Richardson L R, Gold J R
Department of Wildlife and Fisheries Sciences, Texas A&M University, College Station 77843.
Mol Mar Biol Biotechnol. 1993 Jun;2(3):154-61.
Variation in mitochondrial DNA (mtDNA) was examined among 86 red snapper (Lutjanus campechanus) from three geographic localities in the northern Gulf of Mexico (Gulf). A total of 29 composite mtDNA genotypes (haplotypes) was found; one haplotype occurred in 39 of 86 (45.3%) individuals assayed, and 20 haplotypes occurred in only one individual each. Tests of heterogeneity in mtDNA haplotype frequencies among localities were not significant, and there was little evidence of phylogeographic structuring of mtDNA haplotypes. These findings are consistent with the hypothesis that red snapper in the northern Gulf comprise a single, panmictic population. The observed genetic homogeneity also indicates considerable gene flow (migration) among red snapper in the northern Gulf. Significant differences in levels of intrapopulational mtDNA variation were found among localities. Levels of intrapopulational mtDNA diversity in red snapper are low relative to other marine fish species studied to date.
在来自墨西哥湾北部三个地理区域的86条红鲷鱼（Lutjanus campechanus）中检测了线粒体DNA（mtDNA）的变异情况。共发现了29种复合mtDNA基因型（单倍型）；在86条被检测个体中有39条（45.3%）出现了一种单倍型，另外20种单倍型则仅在一个个体中出现。对不同区域间mtDNA单倍型频率的异质性检验并不显著，几乎没有证据表明mtDNA单倍型存在系统地理结构。这些发现与墨西哥湾北部的红鲷鱼构成一个单一随机交配种群的假设一致。观察到的遗传同质性也表明墨西哥湾北部的红鲷鱼之间存在相当大的基因流动（迁移）。在不同区域间发现了种群内mtDNA变异水平的显著差异。相对于迄今研究的其他海洋鱼类物种，红鲷鱼种群内mtDNA多样性水平较低。
