...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ICES Journal of Marine Science >Identifying the location and importance of spawning sites of Western Baltic herring using a particle backtracking model
【24h】

Identifying the location and importance of spawning sites of Western Baltic herring using a particle backtracking model

机译：使用粒子回溯模型确定西波罗的海鲱鱼产卵地点的位置和重要性

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

The recruitment success of some herring stocks fluctuates strongly, and apparently, success is often already determined during the early life stages, i.e. before metamorphosis. In studying the survival of early life stages and its affecting factors, particularly those during the egg stage, it is crucial to examine the processes at the spawning sites, which often cannot be explored directly. A recent decline in the recruitment of Western Baltic spring-spawning herring (WBSSH) increases the urgency of filling the knowledge gap for this stock, especially because one bottleneck in the recruitment seems to occur before hatching. We examined the successful 2003-2009 spawning sites of WBSSH in the main spawning ground, the Greifswalder Bodden lagoon. Instead of using common techniques such as diving or underwater videography, which are usually unsuitable for mapping large areas, we applied a model approach. We tracked herring larvae at length 6 -10 mm, recorded by larval surveys during March -June of the respective years, back to their hatching sites using a Lagrangian particle backtracking model. We compared the spawning areas identified by the model with the results of earlier field studies; however, we also analysed variations between years, larval length groups, and different applied growth models, which are needed to define hatch-dates. Although spawning sites could not be identified with high precision because of the strong diffusion in the area studied, results indicate that larvae up to 10 mm length are caught near their hatching sites. However, the location of successful spawning sites varied largely between years, with the main hatching sites situated in the Strelasund and the eastern entrance of the lagoon. This may reflect variations in spawning-site selection or quality. A better knowledge of the locations and relative importance of, and the processes occurring on, the different spawning sites will provide an important contribution to the sustainable management of this commercially valuable herring stock.
机译：一些鲱鱼种群的招聘成功起伏很大，显然，在生命的早期，即变态之前，通常已经确定了成功。在研究早期生命的存活及其影响因素（尤其是卵子阶段的生命）时，至关重要的是检查产卵部位的过程，这些过程通常无法直接探索。最近，西波罗的海春季产卵鲱鱼（WBSSH）的征聘减少，增加了填补该种群知识缺口的紧迫性，尤其是因为招聘的瓶颈似乎在孵化之前就已经出现。我们在主要产卵场格赖夫斯瓦尔德博登泻湖中检查了WBSSH在2003-2009年成功产卵的地点。我们没有使用通常不适合绘制大面积地图的通用技术，例如潜水或水下摄影，而是采用了模型方法。我们使用拉格朗日粒子回溯模型追踪了在相应年份的3月至6月间通过幼虫调查记录的6 -10毫米长的鲱鱼幼虫，回到其孵化场。我们将模型确定的产卵区域与早期实地研究的结果进行了比较。但是，我们还分析了定义孵化日期所需的年，幼体长度组和不同的应用生长模型之间的差异。尽管由于所研究区域的强烈扩散而无法高精度地确定产卵地点，但结果表明，长达10 mm的幼虫被捕获在其孵化地点附近。但是，成功的产卵场的位置在几年之间变化很大，主要的孵化场位于斯特拉松德（Strelasund）和泻湖的东部入口。这可能反映了产卵地点选择或质量的变化。更好地了解不同产卵场的位置和相对重要性以及发生的过程，将为这种商业上有价值的鲱鱼种群的可持续管理做出重要贡献。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
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