Small vs. large eggs: comparative population connectivity and demographic history along a depth gradient in deep-sea crangonid <i>Argis</i> shrimps
Small vs. large eggs: comparative population connectivity and demographic history along a depth gradient in deep-sea crangonid <i>Argis</i> shrimps
复制标题
小卵与大卵：深海虾类<i>Argis</i>虾沿深度梯度的比较种群连通性和种群历史
DOI：
10.1093/biolinnean/blab104
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发表时间：
2021
影响因子：
1.9
通讯作者：
Yamashita Yoh
中科院分区：
文献类型：
--
作者：
Fujita Junta;Drumm David T;Iguchi Akira;Tominaga Osamu;Kai Yoshiaki;Yamashita Yoh
南美白对虾Argis hozwai，A.laranda。共同分布在日本海的托山鱼，在地理分布、水深分布和繁殖生物学上表现出有趣的差异。LAR(200-300米)广泛分布于太平洋西北部，产卵数量相对较多，而A。东山鱼(250-2000米)分布于日本海，产卵少量大型卵。我们通过线粒体DNA序列变异比较遗传种群结构，研究了卵大小和深海扩散模式之间的关系。我们在日本海论坛内发现了很少或没有遗传差异。霍扎瓦和A。Lar，而Ina有轻微但显著较高的遗传分化。托雅玛人。这表明了这一点。毒蛾的扩散能力较低。霍扎瓦和A。因此，为了适应日本海的深海环境，可能会通过在孵化时增加幼体的直接或缩短发育来最大化幼虫的存活率。我们还检测了更新世冰期剧烈的环境变化对日本海人口过程的影响。
The crangonid shrimpsArgis hozawai,A. larandA. toyamaensis, co-distributed in the Sea of Japan, exhibit intriguing differences in geographical and bathymetric distributions and in reproductive biology.Argis hozawai(150–250 m depth) andA. lar(200–300 m) are broadly distributed in the north-western Pacific Ocean and spawn relatively large numbers of small eggs, whereasA. toyamaensis(250–2000 m) is distributed in the Sea of Japan and spawns a small number of large eggs. We examined the relationship between egg size and dispersal patterns in the deep sea by comparing genetic population structures using mitochondrial DNA sequence variation. We found little or no genetic divergence within the Sea of Japan forA. hozawaiandA. lar, whereas there was a slight but significantly higher genetic differentiation inA. toyamaensis. This suggests thatA. toyamaensishas lower dispersal ability thanA. hozawaiandA. lar, and therefore might maximize larval survival through larger size at hatching, with either direct or abbreviated larval development, to adapt to the deep-sea environment in the Sea of Japan. We also detected the effects of drastic environmental changes during the Pleistocene glacial periods on their demographic processes in the Sea of Japan.