Integrating the effects of fish exploitation and interspecific competition into current life history theories: an example with lacustrine brook trout (Salvelinus fontinalis) populations
Integrating the effects of fish exploitation and interspecific competition into current life history theories: an example with lacustrine brook trout (Salvelinus fontinalis) populations
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将鱼类开发和种间竞争的影响纳入当前的生活史理论：以湖泊鳟鱼（Salvelinus fontinalis）种群为例
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
M. Plante
中科院分区：
文献类型：
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作者：
P. Magnan;R. Proulx;M. Plante
我们使用的数据从17个人口的湖泊溪鳟鱼（Salvelinus fontinalis）的加拿大地盾，南部魁北克，测试是否早熟（男性和女性）和高繁殖努力（女性）与增加（一）鱼类开发（sportfishing）和（ii）种间竞争，通过其对生长和生存的影响。成熟的男性和女性的年龄呈负相关的捕捞和种间竞争的强度。捕鱼和种间竞争影响成熟年龄，通过其对成年生存的影响，但不对生长，支持基于生存的生活史模型的预测。与此相反，我们没有发现一致的影响种间竞争和捕捞的女性，这是直接相关的生存（在所有人群）和成熟的年龄（在开发人群）的性腺指数。这些后者的结果是相反的生活史模型的预测下的napti…
We used data from 17 populations of lacustrine brook trout (Salvelinus fontinalis) of the Canadian Shield, southern Quebec, to test whether early maturity (in males and females) and high reproductive effort (in females) are associated with increased (i) fish exploitation (sportfishing) and (ii) interspecific competition through their effects on growth and survival. The age at maturity of males and females was inversely related to the intensity of both fishing and interspecific competition. Fishing and interspecific competition affect the age at maturity through their effect on adult survival but not on growth, supporting predictions of life history models based on survival. In contrast, we did not find consistent effects of interspecific competition and fishing on the gonadosomatic index of females, which was directly related to survival (in all populations) and to the age at maturity (in exploited populations). These latter results are contrary to the predictions of life history models under the assumpti...