Estimation of eggs lost from superimposed pink salmon (Oncorhynchus gorbuscha) redds
Estimation of eggs lost from superimposed pink salmon (Oncorhynchus gorbuscha) redds
复制标题
叠加粉红鲑鱼 (Oncorhynchus gorbuscha) 红鲑鱼卵损失的估计
DOI：
10.1139/f97-260
复制
发表时间：
1998
影响因子：
2.4
通讯作者：
W. W. Smoker
中科院分区：
文献类型：
--
作者：
M. Fukushima;T. Quinn;W. W. Smoker
本研究调查了粉红鲑鱼（Oncorhynchus gorbuscha）重复使用有限的产卵场（即红色叠加）是否会导致密度依赖性死亡率。阿拉斯加奥克溪部分地区的鸡蛋损失量是通过一系列标记重捕获实验和最大似然模型估算得出的。在 5 周的产卵季节和之后的 2 周内，每天损失的卵数量大致与产卵鱼的丰度成正比，与溪流流量的关系微弱。停止产卵后的新鲜鱼引起的卵损失可以忽略不计。当研究区域每日产卵鱼数量（雄性和雌性）最多为 1000 只时，一种模型估计的每日最大卵损失为 398 000 枚卵（80% CI = 267 000 - 1 581 000），或者相当于损失约 300 只雌性产卵鱼。
This study investigated whether repeated use of limited spawning grounds (i.e., redd superimposition) by pink salmon (Oncorhynchus gorbuscha) can cause density-dependent mortality. Loss of eggs from part of Auke Creek, Alaska, was estimated from a series of mark-recapture experiments and maximum likelihood models. The number of eggs lost per day during the 5-week spawning season and for 2 weeks afterward was roughly proportional to spawner abundance and weakly related to stream discharge. Freshets after cessation of spawning induced negligible egg loss. The maximum daily egg loss estimated by one model was 398 000 eggs (80% CI = 267 000 - 1 581 000) or equivalently a loss of about 300 female spawners when the daily spawner abundance (both male and female) in the study area was at most 1000.