Comparative character of the deep‐water and inshore cottoid fishes endemic to Lake Baikal
Comparative character of the deep‐water and inshore cottoid fishes endemic to Lake Baikal
复制标题
贝加尔湖特有的深水和近岸角状鱼类的比较特征
DOI：
10.1111/j.1095-8649.1996.tb06076.x
复制
发表时间：
1996
影响因子：
2
通讯作者：
V. Sideleva
中科院分区：
文献类型：
--
作者：
V. Sideleva
贝加尔湖的29种特有的鱼分为三个组：浅水物种在深度350米;广深物种从50至1300米;和深海物种从400至1600米。这些群体承受高静水压力的能力不同。与海洋深水鱼类一样，贝加尔湖的深海鱼类的视网膜上几乎没有或没有锥体，有些有管状眼睛。他们的地震感觉系统占主导地位，主要是基于自由的神经瘤。具有沟渠系统的物种比例随深度而减少。主要gammarid食物的多样性也从浅水的45种减少到深水的5种，侧线系统在所有深度的食物检测中起着主导作用。两种深海梭鱼已成为次级中上层鱼类，通过高脂含量和减少骨骼矿化，实现了接近中性的浮力。这些形式利用了丰富的远洋浮游端足类种群。深海鱼类的适应性与深水海洋鱼类相似。
Lake Baikal's 29 endemic species of cottoid fishes form three groups: shallow-water species in depths to 350 m; eurybathic species from 50 to 1300 m; and abyssal species from 400 to 1600 m. These groups differ in their abilities to withstand high hydrostatic pressure. As in marine deep-water fishes, abyssal cottoids in Baikal have few or no cones in the retina, and some have tubular eyes. Their seismosensory systems predominate, based chiefly on free neuromasts. The proportion of species with canal systems decreases with depth. Diversity of the predominantly gammarid foods also decreases from 45 species in shallow water to five species in deep water, and the lateral line system plays the dominant role in food detection at all depths. Two abyssal cottoids have become secondary pelagic, achieving close to neutral buoyancy through high lipid levels and reduced skeletal mineralization. These forms take advantage of the abundant pelagic planktonic amphipod populations. The adaptations of abyssal forms parallel those seen in deep-water marine fishes.