Distribution, quantitative composition, and feeding of jellyfish in the Western Bering Sea in summer and fall
Distribution, quantitative composition, and feeding of jellyfish in the Western Bering Sea in summer and fall
复制标题
夏秋季西白令海水母的分布、数量组成及摄食
DOI：
10.1134/s1063074008070043
复制
发表时间：
2008
影响因子：
0.6
通讯作者：
N. S. Kosenok
中科院分区：
文献类型：
--
作者：
A. Zavolokin;I. .. Glebov;N. S. Kosenok
本论文的基础是 TINRO 中心 2002 年至 2006 年夏秋季节在西白令海上层海域进行的六次复杂拖网调查的材料。水母的总生物量（和丰度）从夏季的 0.6-080 万吨（1.1-18 亿个体）增加到秋季的 0.9-170 万吨（4.4-48 亿个体）。 ScyphomedusaChrysaora melanaster 和 HydromedusaAequorea forskalea 构成了水母生物量的主要部分（67-97%）。它们的分布差异很大。 forskalea主要聚集在白令海的深水部分。黑色素广泛分布在整个调查区域，并在阿纳德尔-纳瓦林地区形成最大规模的聚集体。 2006年秋季，水母的食物通常由浮游生物组成（桡足类、磷虾科、片足类、翼足类、毛颌类、介形类和十足目幼虫）。然而，Ch。黑色素的饮食中含有较多的鱼和鱿鱼幼体。
Materials from six complex trawl surveys conducted by the TINRO-Center in the upper epipelagic zone of the Western Bering Sea during the summer-fall seasons from 2002 through 2006 were used as the basis of this paper. The overall biomass (and abundance) of jellyfish increased from 0.6–0.8 million t (1.1–1.8 billion individuals) in the summer up to 0.9–1.7 million t (4.4–4.8 billion individuals) in fall. ScyphomedusaChrysaora melanasterand the HydromedusaAequorea forskaleamade up the major part of the jellyfish biomass (67–97%). Their distribution varied significantly.A. forskaleaaggregated mainly in the deepwater part of the Bering Sea.Ch. melanasterwas widely dispersed across the entire area of the investigations and formed the most considerable aggregations in the Anadyr-Navarin area. In the fall of 2006 the diet of jellyfish generally consisted of plankton organisms (copepods, euphausiids, amphipods, pteropods, chaetognaths, ostracods, and larval decapods). However,Ch. melanasterhad a greater portion of fish and larval squid in its diet.