Genetic identification of progeny of reef-resident brown rockfish (Sebastes auriculatus)
Genetic identification of progeny of reef-resident brown rockfish (Sebastes auriculatus)
复制标题
珊瑚礁褐石斑鱼 (Sebastes auriculatus) 后代的遗传鉴定
DOI：
10.4027/bamnpr.2007.06
复制
发表时间：
2007
期刊：
影响因子：
--
通讯作者：
R. Buckley
中科院分区：
文献类型：
--
作者：
L. Hauser;L. Newton;L. Leclair;R. Buckley
底层鱼类幼体滞留和产卵归宿的程度是海洋保护区(MPA)设计和效力的中心议题。不幸的是，人们对幼虫在许多海洋物种中的有效传播知之甚少。许多物种的中上层阶段的持续时间表明了广泛的扩散，种群遗传学研究表明有大规模的迁徙交换，尽管最近也有证据表明实现的扩散令人惊讶地有限。在这里，我们使用遗传标记(微卫星)来识别在普吉特湾Point Heyer一个孤立的人工珊瑚礁上迁入的落户幼鱼中的成年岩鱼(Sebases Aurrulatus)的后代，从而直接估计珊瑚礁上的自我募集速度。由于标记变异性低，从经验数据中明确识别这些后代是不可能的。然而，观察到的遗传数据和模拟的遗传数据中亲子匹配的比较表明，自交不到10%。通过幼虫耳石标记，其中一只与成虫基因匹配的幼虫被确认为其后代，这证实了确实发生了自我招募。我们的数据表明，100只栖息在珊瑚礁上的褐岩鱼进行了一些但有限的自我招募，这与褐岩鱼在这种规模下的平均分散距离的预期很好地相符。
The extent of larval retention and natal homing in demersal fish is a topic central to the design and the efficacy of marine protected areas (MPAs). Unfortunately, little is known about effective larval dispersal in many marine species. The duration of the pelagic phase in many species suggests extensive dispersal, and population genetic studies indicate large-scale exchange of migrants, though there is also recent evidence for surprisingly limited realized dispersal. Here, we use genetic markers (microsatellites) to identify the offspring of resident adult brown rockfish (Sebastes auriculatus) among incoming settling juveniles on an isolated artificial reef at Point Heyer in Puget Sound, thus directly estimating rates of self-recruitment on the reef. Due to low marker variability, unambiguous identification of these offspring from empirical data was not possible. Nevertheless, comparison between parent-offspring matches in observed and simulated genetic data suggested that selfrecruitment was less than 10%. One of the juveniles genetically matching an adult was confirmed as its offspring by larval otolith marking, which confirms that self-recruitment does occur. Our data suggested 100 Hauser et al.—Reef-Resident Brown Rockfish some, but limited, self-recruitment, that corresponded well to expectations at this scale from mean dispersal distances in brown rockfish.