| 来源类型 | Article |
| 规范类型 | 其他 |
| DOI | 10.1016/j.ecolmodel.2015.10.002 |
| Stocking strategies for a pre-alpine whitefish population under temperature stress. | |
| Ficker H; Mazzucco R; Gassner H; Wanzenboeck J; Dieckmann U | |
| 发表日期 | 2016 |
| 出处 | Ecological Modelling 320: 170-176 |
| 出版年 | 2016 |
| 语种 | 英语 |
| 摘要 | Cold-water fish stocks are increasingly affected by steadily increasing water temperatures. The question arises whether stock management can be adapted to mitigate the consequences of this climatic change. Here, we estimate the effects of increasing water temperatures on fisheries yield and population dynamics of whitefish, a typical cold-water fish species. Using a process-based population model calibrated on an empirical long-term data set for the whitefish population (Coregons lavaretus (L.) species complex) of the pre-alpine Lake Irrsee, Austria, we project density-dependent and temperature-dependent population growth and compare established stock enhancement strategies to alternative stocking strategies under the aspect of increasing water temperatures and cost neutrality. Additionally, we contrast the results obtained from the process-based model to the results from simple regression models and argue that the latter show qualitative inadequacies in projecting catch with rising temperatures. Our results indicate that increasing water temperatures reduce population biomass between 2.6% and 7.9% and catch by the fishery between 24% and 48%, depending on temperature scenario and natural mortality calculation. These reductions are caused by accelerated growth, smaller asymptotic size and lower annual survival of whitefish. Regarding stocking strategies under constant temperatures, we find that stocking mostly whitefish larvae, produces higher population biomass than stocking mostly one-summer-old whitefish, while catch remains almost constant. With increasing temperatures, stocking one-summer-old fish is more beneficial for the angling fishery. Adaption to climate change by changing stocking strategies cannot, however, prevent an overall reduction in catch and population size of this cold-water fish species. |
| 主题 | Evolution and Ecology (EEP) |
| 关键词 | angling climate change cold-water fish growth probability matrix model |
| URL | http://pure.iiasa.ac.at/id/eprint/11722/ |
| 来源智库 | International Institute for Applied Systems Analysis (Austria) |
| 引用统计 | |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/130600 |
| 推荐引用方式 GB/T 7714 | Ficker H,Mazzucco R,Gassner H,et al. Stocking strategies for a pre-alpine whitefish population under temperature stress.. 2016. |
| 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 | ||
| J_APP_ECO_Stocking_s（570KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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