...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine ecology progress series >Modelling the transport success of anchovy Engraulis encrasicolus eggs and larvae in the southern Benguela: the effect of spatio-temporal spawning patterns
【24h】

Modelling the transport success of anchovy Engraulis encrasicolus eggs and larvae in the southern Benguela: the effect of spatio-temporal spawning patterns

机译：模拟本格拉南部an鱼Engraulis encrasicolus卵和幼虫的运输成功：时空产卵模式的影响

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

Recruitment success of anchovy Engraulis encrasicolus in the southern Benguela is thought to depend largely on the passive transport of eggs and larvae from their warm-water spawning area, located in the southern part of their distribution range (Agulhas Bank), to their cold-water nursery grounds located 500 km away on the west coast of South Africa. In order to test this hypothesis, the output of a 3D hydrodynamic model was coupled to a particle-tracking model, allowing the quantification of different factors such as the timing and precise location of spawning activity, the frequency of spawning activity within a month, the level of aggregation of the spawning stock, and the interannual variability of transport due to mesoscale processes. Results from the model indicate that spawning season and area have a major effect on transport success. The most favourable period for spawning was September to March, peaking in November, and the western Agulhas Bank was the most favourable spawning area. A low success rate of passive transport to the core inshore nursery area in the model suggests that additional processes such as swimming or advection are required for larvae to reach this area. In general, there was good agreement between observed spawning patterns and the optimal temporal and spatial strata where particle transport was most successful, suggesting that the spawning strategy of anchovy is mainly the result of an adaptation to the circulation patterns in the region. Nonetheless, some discrepancies were observed between the success of transport and actual spawning patterns, and temperature may also be an important factor to take into consideration to fully explain how this originally temperate species is able to survive in an area of highly contrasting temperatures.
机译：人们认为，本格拉南部an鱼Engraulis encrasicolus的招聘成功很大程度上取决于卵和幼虫从分布范围南部（Agulhas Bank）南部的温水产卵区到冷水的被动运输。位于南非西海岸500公里处的苗圃场。为了检验该假设，将3D水动力模型的输出与粒子跟踪模型耦合，从而可以量化不同的因素，例如产卵活动的时间和精确位置，一个月内产卵活动的频率，产卵种群的聚集水平，以及由于中尺度过程而引起的运输的年际变化。该模型的结果表明产卵季节和面积对运输成功有重大影响。产卵的最有利时期是9月至3月，11月达到顶峰，西部的Agulhas Bank是最有利的产卵区。该模型中被动运输到核心近岸苗圃地区的成功率很低，这表明幼体到达该区域还需要进行额外的过程，例如游泳或平流。通常，观察到的产卵模式与最成功的颗粒运输最合适的时空层之间有良好的一致性，这表明an鱼的产卵策略主要是适应该地区环流模式的结果。尽管如此，在运输成功与实际产卵方式之间仍观察到一些差异，温度也可能是要考虑的一个重要因素，以充分解释这种原始的温带物种如何能够在温度高度相反的区域中生存。

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