Productivity and life history of sockeye salmon in relation to competition with pink and sockeye salmon in the North Pacific Ocean
Productivity and life history of sockeye salmon in relation to competition with pink and sockeye salmon in the North Pacific Ocean
复制标题
北太平洋红鲑鱼的生产力和生活史与粉红鲑鱼和红鲑鱼的竞争
DOI：
10.1139/cjfas-2014-0134
复制
发表时间：
2015
影响因子：
2.4
通讯作者：
B. Connors
中科院分区：
文献类型：
--
作者：
G. Ruggerone;B. Connors
Sockeye salmon (Oncorhynchus nerka) populations from Southeast Alaska through British Columbia to Washington State have experienced similar declines in productivity over the past two decades, leading to economic and ecosystem concerns. Because the declines have spanned a wide geographic area, the primary mechanisms driving them likely operate at a large, multiregional scale at sea. However, identification of such mechanisms has remained elusive. Using hierarchical models of stock–recruitment dynamics, we tested the hypothesis that competition between pink (Oncorhynchus gorbuscha) and sockeye salmon for prey has led to reduced growth and productivity and delayed maturation of up to 36 sockeye populations spanning the region during the past 55 years. Our findings indicate the abundance of North Pacific pink salmon in the second year of sockeye life at sea is a key factor contributing to the decline of sockeye salmon productivity, including sockeye in the Fraser River where an increase from 200 to 400 millio...
