SPECIATION IN THE HAMLETS (HYPOPLECTRUS, SERRANIDAE) - A CONTINUING ENIGMA
SPECIATION IN THE HAMLETS (HYPOPLECTRUS, SERRANIDAE) - A CONTINUING ENIGMA
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DOI：
10.2307/1444441
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发表时间：
1980-01-01
期刊：
影响因子：
2.6
通讯作者：
FISCHER, EA
中科院分区：
文献类型：
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作者：
FISCHER, EA
这些海鲈（Hypoplectrus）是雌雄同体、肉食性的，主要分布于西大西洋热带海域。该属的几个形态种基本上是同域的和同域的，但在形态上，除了颜色模式外，所有的主要特征都非常相似。即使在这里，也偶尔会遇到中间个体。哈姆雷特是拾荒的捕食者，觅食行为是相似的，在所有观察到的形态种除了H。靛蓝，其中较大的个体主要以食鱼的pomacentrid Chromis cyaneus为食。H.靛蓝也比其他村庄成熟得更大。所有形态种的生殖行为都是相似的。形态种之间的交配很少观察到，只有最相似的颜色模式的形态种之间。总的来说，证据表明，小村形成了一个多物种的复合体，限制同域形态种之间的基因交换。结果既不支持也不反驳的想法，哈姆雷特是侵略性的模仿，但他们确实表明，至少有一些情况下，颜色模式的哈姆雷特似乎已经收敛与同域非肉食性鱼类可以解释的操作类似的选择压力，假定的模型和模仿，而不是侵略性模仿的发生。
The hamlets (Hypoplectrus) are simultaneously hermaphroditic, carnivorous, largely territorial seabasses (Serranidae), limited almost entirely to the tropical Western Atlantic. Several of the morphospecies in the genus are largely sympatric and syntopic, but morphologically, all are remarkably similar in every major feature except color pattern. Even here, intermediate individuals are occasionally encountered. Hamlets are gleaning predators, and foraging behavior is similar in all observed morphospecies except H. indigo, in which larger individuals fed mostly on the planktivorous pomacentrid Chromis cyaneus. H. indigo also matures at a larger size than other hamlets. Reproductive behavior is similar in all morphospecies. Matings between morphospecies were observed infrequently and only between morphospecies of most similar color pattern. Overall, the evidence suggests that hamlets form a multispecies complex, with restricted exchange of genes among sympatric morphospecies. The results neither support nor refute the idea that hamlets are aggressive mimics, but they do suggest that at least some of the cases where color patterns of hamlets appear to have converged with those of sympatric noncarnivorous fish can be accounted for by the operation of similar selective pressures on both putative model and mimic, rather than the occurrence of aggressive mimicry.