| 来源类型 | Monograph (IIASA Interim Report) |
| 规范类型 | 报告 |
| Diet and Divergence of Introduced Smallmouth Bass, Micropterus Dolomieu, Populations. | |
| Dunlop ES; Orendorff JA; Shuter BJ; Rodd FH; Ridgway MS | |
| 发表日期 | 2005 |
| 出版者 | IIASA, Laxenburg, Austria: IR-05-082 |
| 出版年 | 2005 |
| 语种 | 英语 |
| 摘要 | We examine the degree and causes of divergence in growth and reproduction in two populations of smallmouth bass (Micropterus dolomieu) introduced a century ago. Despite a common source, the Provoking Lake population now has a higher population density and slower growing individuals than the Opeongo Lake population. Using this system, we test the predictions of life history theory that delayed maturation and reduced reproductive investment are expected in high density populations with slow individual growth rates. Observations on both populations run directly counter to the aforementioned expectations. Instead, Provoking males have smaller sizes/younger ages at nesting and higher gonad masses than Opeongo males; Provoking females have smaller sizes at maturity, larger egg sizes, and higher ovarian dry masses than Opeongo females. Temperature, food availability, diet ontogeny, newborn mortality, and adult mortality were examined as plausible contributors to the divergence. Results suggest that low food availability, likely caused or mediated by intra-specific competition for prey, and lack of large-sized prey in the diet are contributing to the slow growth, increased reproductive investment, and higher mortality following reproduction in Provoking. This study provides insight into the processes that produce rapid divergence of life history in a species exhibiting parental care. |
| 主题 | Adaptive Dynamics Network (ADN) |
| URL | http://pure.iiasa.ac.at/id/eprint/7760/ |
| 来源智库 | International Institute for Applied Systems Analysis (Austria) |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/125392 |
| 推荐引用方式 GB/T 7714 | Dunlop ES,Orendorff JA,Shuter BJ,et al. Diet and Divergence of Introduced Smallmouth Bass, Micropterus Dolomieu, Populations.. 2005. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 资源类型 | 版本类型 | 开放类型 | 使用许可 | ||
| IR-05-082.pdf（256KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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