Multiple paternity and competition in sympatric congeneric reef fishes, Embiotoca jacksoni and E. lateralis
Multiple paternity and competition in sympatric congeneric reef fishes, Embiotoca jacksoni and E. lateralis
复制标题
同域同属礁鱼 Embiotoca jacksoni 和 E. Lateralis 的多重亲子关系和竞争
作者：
C. Reisser;R. Beldade;G. Bernardi
黑鲈Embiotoca jacksoni和条纹鲈E. lateralis（Embiototocellae，Perciformes）是温带珊瑚礁鱼类，在其分布范围的很大一部分上共域生活，在那里它们表现出强烈的生态竞争。为了评估交配策略是否反映了竞争，我们调查了这两个物种在同域区的多重父系。我们在加州的蒙特雷湾采集了24只怀孕雌性（每种12只）的样本，使用微卫星分析，并使用殖民地软件评估亲子关系。虽然窝是相对较小的（12至36个后代），他们总是由多个父亲（2至9），没有一个窝的大小和父亲的数量之间的相关性。每窝公畜的数量在两个物种之间没有显着差异（约3.5公畜每窝）。我们测试了偏离随机性的父代后代的每个父亲在一个育雏。结果表明，E. jacksoni和E.外侧肌然而，未发现种属之间存在显著差异。在这些物种中的多个父系的动态，在同域采样时，惊人的相似性，可能会导致从几个替代方案，包括系统发育惯性，生殖行为和生态竞争。
The black surfperch Embiotoca jacksoni and the striped surfperch E. lateralis (Embiotocidae, Perciformes) are livebearing temperate reef fishes that live sympatrically over a large portion of their distribution range, where they exhibit strong ecological competition. In order to assess whether mating strategies reflect competition, we investigated multiple paternity in these two species in an area of sympatry. We sampled 24 pregnant females (12 for each species) in Monterey Bay, California, used microsatellite analysis and assessed paternity with the COLONY software. While broods are relatively small (12 to 36 offspring), they were always sired by multiple fathers (2 to 9), with no correlation between the size of a brood and the number of fathers. The number of sires for each brood was not significantly different between the two species (approximately 3.5 sires per brood). We tested the deviation from stochasticity of fathered offspring for each father in one brood. Results showed a significant deviation for both E. jacksoni and E. lateralis. However, this deviation was not found to be significant between species. The striking similarity in the dynamics of multiple paternity in these species, when sampled in sympatry, may result from several alternative scenarios, including phylogenetic inertia, reproductive behaviour, and ecological competition.