• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Fisheries Research >Interannual-decadal variability of demersal fish assemblages in the Tsushima Warm Current region of the Japan Sea: Impacts of climate regime shifts and trawl fisheries with implications for ecosystem-based management
【24h】

Interannual-decadal variability of demersal fish assemblages in the Tsushima Warm Current region of the Japan Sea: Impacts of climate regime shifts and trawl fisheries with implications for ecosystem-based management

机译：日本海对马暖流地区深海鱼群的年际年代际变化：气候制度转变和拖网渔业的影响对基于生态系统的管理产生影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Data sets for two bottom trawl fisheries, the coastal pair-trawler fishery and offshore single-trawler fishery in the Tsushima Warm Current (TWC) region of the Japan Sea, were compiled and analyzed for the last three decades (1974-2006). These data sets were used to (1) identify and compare the variability in demersal fish assemblages, and (2) relate these to water temperature to examine the impacts of climate regime shifts. Principal component analysis (PCA) of catches of target species in the two trawler fisheries showed synchronous decadal variability with step changes around 1986/1987 and 1996/1997. These step changes strongly suggest the effect of the late 1980s climate regime shift, which was characterized by an abrupt change from a cool to a warm condition in the TWC. The first and second principal components (PC1 and PC2) for both trawler fisheries agreed closely with winter and summer water temperature in the Japan Sea, respectively, suggesting PC1 (PC2) was associated with cold- (warm-) water species. However, between warm- and cold-water species the response pattern to water temperature was different. CPUE (catch per unit effort) of warm- (cold-) water species correlated positively (negatively) with water temperature, indicating the increase in water temperature has a positive (negative) effect on warm(cold-) water species. Cold-water species decreased (increased) both in biomass and distribution during the warm (cold) regime, while warm-water species increased in biomass and/or distribution during the warm 1990s. These results suggested that the demersal fish assemblage structure changed abruptly as a consequence of the late 1980s climate regime shift. Impact of fishing was unclear on the demersal fish assemblage as a whole, but fishing pressure has been intensified for specific species under unfavorable climate regimes even with a declining fishing effort. Differing response patterns between warm- and cold-water species to climate regime shifts suggest the importance of integrated assessment and ecosystem-based management for the whole trawl fishery rather than only for individual target species. (C) 2011 Elsevier B.V. All rights reserved.
机译：最近三十年（1974-2006年），对日本海对马暖流（TWC）地区的两个底拖网渔业，沿海对拖网渔场和近海单拖网渔场的数据集进行了分析。这些数据集用于（1）识别和比较水下鱼类组合的变异性，以及（2）将这些与水温相关联以检查气候变化的影响。在两个拖网渔场中，对目标物种捕获量的主成分分析（PCA）显示出同步年代际变化，并在1986/1987年和1996/1997年之间出现阶跃变化。这些阶跃变化强烈暗示了1980年代后期气候体制转变的影响，其特征是TWC的从冷到热的突然变化。两个拖网渔场的第一和第二主要成分（PC1和PC2）分别与日本海的冬季和夏季水温密切相关，这表明PC1（PC2）与冷（温）水物种有关。然而，在温水和冷水物种之间，对水温的响应模式是不同的。暖（冷）水物种的CPUE（每单位工作量捕获量）与水温呈正（负）相关，表明水温升高对暖（冷）水物种具有正（负）影响。在温暖（冷）时期，冷水物种的生物量和分布均减少（增加），而在1990年代温暖期间，温水物种的生物量和/或分布增加。这些结果表明，由于1980年代后期的气候体制转变，海底鱼类的组合结构突然发生了变化。捕捞对整个沉鱼组合的影响尚不清楚，但在不利的气候条件下，即使捕捞努力减少，特定种类的捕捞压力也有所增加。淡水和冷水物种对气候体制转变的不同响应方式表明，对于整个拖网渔业，而不仅仅是对单个目标物种而言，综合评估和基于生态系统的管理非常重要。 （C）2011 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号