Prospective interspecies interaction between Siberian and Ezo salamander larvae
Prospective interspecies interaction between Siberian and Ezo salamander larvae
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西伯利亚蝾螈和虾夷蝾螈幼虫之间的预期种间相互作用
DOI：
10.1111/1440-1703.12109
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发表时间：
2020
影响因子：
2
通讯作者：
Keisuke Atsumi and Osamu Kishida
中科院分区：
文献类型：
--
作者：
KURIHARA Shun;KUROKAWA Hiroko;TAKIMOTO Gaku;Kunio Takatsu and Osamu Kishida;Keisuke Atsumi and Osamu Kishida
物种栖息地范围部分取决于系统发育相关物种之间的种间相互作用。西伯利亚蝾螈广泛分布于整个欧亚大陆，占据着不同的栖息地，但在日本北海道岛，它仅限于两个地区。由于北海道西伯利亚蝾螈的栖息范围有限，我们假设虾夷蝾螈的幼虫大量捕食两栖动物幼虫，通过幼虫期的捕食将西伯利亚蝾螈排除在其范围之外。在这里，我们在水族馆实验中研究了西伯利亚蝾螈幼虫和虾夷蝾螈幼虫之间的潜在相互作用。不出所料，在它们同居的情况下，所有西伯利亚蝾螈幼虫立即被虾夷蝾螈幼虫捕食而杀死。虽然捕食促进了虾夷蝾螈幼虫的个体生长，但它可能不仅仅增加了虾夷蝾螈幼虫的适应度。有趣的是，在西伯利亚蝾螈存在的情况下，虾夷蝾螈同类相食的情况更加频繁，尽管这种情况只发生在有限的复制中，这可能是由于虾夷蝾螈幼虫的生长速度加快和体型变异增加的结果。
Species habitat range is partly determined by interspecies interactions between phylogenetically related species. Siberian salamanders are widely distributed across the Eurasian continent and occupy various habitats, but in Hokkaido island, Japan, it is restricted to only two regions. For the restricted habitat range of Siberian salamanders in Hokkaido, we hypothesized that Ezo salamander, whose larvae heavily consume amphibian larvae, excludes Siberian salamander from their range by the predation during the larval period. Here, we investigated the potential interaction between Siberian and Ezo salamander larvae in an aquarium experiment. As expected, in the cases where they cohabit, all Siberian salamander larvae were immediately killed by Ezo salamander larvae through predation. Although the predation enhanced individual growth of Ezo salamander larvae, it may not merely increase the fitness of Ezo salamander larvae. Interestingly, in the presence of Siberian salamanders, cannibalism occurred more frequently in Ezo salamanders, even though it only occurred in limited replications, probably as a result of improving growth and increasing size variation among Ezo salamander larvae.