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首页> 美国政府科技报告 >Exploring Ecological Mechanisms Underlying Recruitment of Smallmouth Bass in Lake Erie.
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Exploring Ecological Mechanisms Underlying Recruitment of Smallmouth Bass in Lake Erie.

机译：伊利湖小口黑鲈招募的生态机制探索。

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摘要

We describe how abiotic and biotic mechanisms affect reproductive behavior and nest success of smallmouth bass. We contrast results from two very different systems: Lake Erie, Ohio, USA, and Lake Opeongo, Ontario, Canada. Lake Erie is a large lake, exposed to many storms, resulting in low overall nest success. In addition, high nest-predator densities and high angler effort targeting smallmouth bass result in both high offspring mortality during parental care and high adult mortality. Lake Opeongo is much smaller than Lake Erie (i.e., produces fewer large waves), has a relatively short and cold growing season, has low nest predator densities, and fishing regulations prohibit angling during the smallmouth bass spawning season. From a broad perspective, this study improves our knowledge of how organisms balance current and future fitness by adjusting reproductive behavior and, subsequently, how behavior and environment influence reproductive success. This study also identifies ecological mechanisms that limit smallmouth bass nest success. Ultimately, if recruitment is tied to nest success, these results will improve our understanding of smallmouth bass population dynamics and, thus, allow managers to better predict the effects of different angling regulations and to forecast possible impacts of anthropogenic environmental changes.

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