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来源类型 | Working Paper |
规范类型 | 论文 |
Evaluation of the Status of the Namibian Hake Resource (Merluccius spp.) Using Statistical Catch-at-Age Analysis | |
Carola Kirchner; Paul Kainge; Johannes Kathena | |
发表日期 | 2012-10-17 |
出版年 | 2012 |
页码 | EfD DP 12-12 |
语种 | 英语 |
摘要 | Namibian hake is the most important fish resource in Namibia. This monograph is a compilation of all the hake data, historic and recent, that has been used to inform stock assessment and management since the late 1970s. It presents the statistical catch-at-age analysis used to evaluate the state of the Namibian hake resource under different assumptions. This analysis treats the two hakes, Merluccius paradoxus and M. capensis, as a single stock. The data and modeling show that the stock has not as yet recovered to its maximum sustainable yield level, despite foreign fishing effort having been removed in 1990. Best estimates suggest the current stock to be roughly 20% of pre-exploitation levels; however this figure is sensitive to model assumptions. Signs indicate that the stock is slowly recovering from its all-time low in 2002-2004. Because the two hake species are pooled for assessment, the resource is currently managed on a relatively simple adaptive basis; 80% of the estimated replacement yield is reserved for fishing, the remainder being left for rebuilding. |
主题 | Development and Environment ; Ecosystems ; International |
子主题 | Africa ; Fisheries and Fishing |
URL | http://www.rff.org/research/publications/evaluation-status-namibian-hake-resource-merluccius-spp-using-statistical |
来源智库 | Resources for the Future (United States) |
资源类型 | 智库出版物 |
条目标识符 | http://119.78.100.153/handle/2XGU8XDN/41219 |
推荐引用方式 GB/T 7714 | Carola Kirchner,Paul Kainge,Johannes Kathena. Evaluation of the Status of the Namibian Hake Resource (Merluccius spp.) Using Statistical Catch-at-Age Analysis. 2012. |
条目包含的文件 | 条目无相关文件。 |
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