Research Institute for the Environment and Livelihoods, Charles Darwin University, Darwin, NT 0810, Australia.
J Fish Biol. 2012 May;80(6):2140-58. doi: 10.1111/j.1095-8649.2012.03228.x. Epub 2012 Apr 13.
Reproductive philopatry in bull sharks Carcharhinus leucas was investigated by comparing mitochondrial (NADH dehydrogenase subunit 4, 797 base pairs and control region genes 837 base pairs) and nuclear (three microsatellite loci) DNA of juveniles sampled from 13 river systems across northern Australia. High mitochondrial and low microsatellite genetic diversity among juveniles sampled from different rivers (mitochondrial φ(ST) = 0·0767, P < 0·05; microsatellite F(ST) = -0·0022, P > 0·05) supported female reproductive philopatry. Genetic structure was not further influenced by geographic distance (P > 0·05) or long-shore barriers to movement (P > 0·05). Additionally, results suggest that C. leucas in northern Australia has a long-term effective population size of 11 000-13 000 females and has undergone population bottlenecks and expansions that coincide with the timing of the last ice-ages.
通过比较来自澳大利亚北部 13 个河流系统的幼鱼的线粒体（NADH 脱氢酶亚基 4，797 个碱基对和控制区基因 837 个碱基对）和核（三个微卫星位点）DNA，研究了牛鲨（Carcharhinus leucas）的生殖性亲缘关系。来自不同河流的幼鱼之间具有较高的线粒体和较低的微卫星遗传多样性（线粒体 φ（ST）= 0·0767，P < 0·05；微卫星 F（ST）= -0·0022，P > 0·05），支持雌性的生殖性亲缘关系。遗传结构不受地理距离（P > 0·05）或长距离迁徙障碍（P > 0·05）的进一步影响。此外，结果表明，澳大利亚北部的牛鲨具有长期有效的种群规模为 11000-13000 头雌性，并经历了种群瓶颈和扩张，与上一次冰河时代的时间相吻合。
