Testing for mating isolation between ecotypes: laboratory experiments with lake, stream and hybrid stickleback
Testing for mating isolation between ecotypes: laboratory experiments with lake, stream and hybrid stickleback
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生态型间交配隔离测试：湖泊、溪流和混合刺鱼的实验室实验
DOI：
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发表时间：
2010
影响因子：
2.1
通讯作者：
A. Hendry
中科院分区：
文献类型：
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作者：
J. Raeymaekers;M. Boisjoly;L. Delaire;D. Berner;K. Räsänen;A. Hendry
交配隔离是生态物种形成的一个常见因素--但它作为趋异选择的结果进化的一致性如何呢？我们测试了遗传为基础的交配隔离湖泊和溪流threespine棘鱼（Gasterosteus aculeatus L.）来自不列颠哥伦比亚省的温哥华岛的米斯蒂分水岭。我们结合了几个在棘鱼配偶选择研究中不常见的设计元素：（i）我们使用第二代实验室饲养的鱼（以减少环境和母体影响），（ii）我们允许雄性之间的竞争性相互作用（而不是典型的无选择试验），（iii）我们包括杂交沿着纯类型。不同类型的男性（湖，入口，混合）在水族馆配对，允许筑巢，然后依次暴露于所有三种类型的女性。我们发现，湖和湾男性不同的行为被认为影响刺鱼的配偶选择（间和内的性侵略，显示和巢活动），而混合动力车要么中间或明显的“劣”在这些行为。尽管有这些差异，湖和入口鱼没有交配的优势和混合男性没有交配的劣势。我们的研究加强了交配隔离进化的非必然性，以应对生态差异，并强调需要进一步研究促进和限制生态物种形成的因素。
Mating isolation is a frequent contributor to ecological speciation – but how consistently does it evolve as a result of divergent selection? We tested for genetically based mating isolation between lake and stream threespine stickleback (Gasterosteus aculeatus L.) from the Misty watershed, Vancouver Island, British Columbia. We combined several design elements that are uncommon in the studies of stickleback mate choice: (i) we used second‐generation laboratory‐reared fish (to reduce environmental and maternal effects), (ii) we allowed for male–male competitive interactions (instead of the typical no‐choice trials) and (iii) we included hybrids along with pure types. Males of different types (Lake, Inlet, hybrid) were paired in aquaria, allowed to build nests and then exposed sequentially to females of all three types. We found that Lake and Inlet males differed in behaviours thought to influence stickleback mate choice (inter‐ and intra‐sexual aggression, display and nest activities), whereas hybrids were either intermediate or apparently ‘inferior’ in these behaviours. Despite these differences, Lake and Inlet fish did not mate assortatively and hybrid males did not have a mating disadvantage. Our study reinforces the noninevitability of mating isolation evolving in response to ecological differences and highlights the need to further investigate the factors promoting and constraining progress towards ecological speciation.