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首页> 外文期刊>Marine biology >Bottlenose dolphins and aquaculture: interaction and site fidelity on the north-eastern coast of Sardinia (Italy)
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Bottlenose dolphins and aquaculture: interaction and site fidelity on the north-eastern coast of Sardinia (Italy)

机译：宽吻海豚和水产养殖：撒丁岛（意大利）东北海岸的相互作用和部位保真度

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摘要

Owing to the worldwide growth of aquaculture over the last years, new habitats have been created through the supplement of nutrients. This addition of nutrients affects the whole marine food web, resulting in predator species such as bottlenose dolphins becoming attracted to these areas. During this 5-year-long study that was carried out along the north-eastern coast of Sardinia (Italy), bottlenose dolphin's history of exposure to aquaculture perturbations and their effects was documented. The interaction with a fish farm was assessed by studying the site fidelity, group dynamics, and seasonal and yearly occurrence. In all, 1,838 hours were spent in the field. Behavioural observations showed that the predominant activity (89 % of the time) in the fish farm was foraging (predation and depredation). The occurrence of bottlenose dolphins appeared to be related with the seasons and with the fish farm harvesting operations. Thus, the peak dolphin occurrence in the fish farm area throughout Fall coincides with the period in which they spend most of their time foraging. A relatively small community remained resident interacting with the fish farm over a long period of time. Hence, these individuals gained intimate knowledge on how to capitalize on the fish farm industry. This heterogeneity in site fidelity and residence patterns is highly relevant when coastal management initiatives are considered.
机译：由于近几年来全球水产养殖的增长，通过补充营养物创造了新的栖息地。营养素的添加影响整个海洋食物网，导致宽吻海豚等捕食物种被这些区域吸引。在撒丁岛（意大利）东北海岸进行的为期5年的研究中，宽吻海豚接触水产养殖扰动的历史及其影响已得到记录。通过研究场地保真度，群体动态以及季节性和年度发生情况来评估与养鱼场的互动。总共花了1,838小时。行为观察表明，养鱼场的主要活动（占时间的89％）是觅食（捕食和掠食）。宽吻海豚的发生似乎与季节和养鱼场的捕捞作业有关。因此，整个秋季在养鱼场中海豚的高峰期与他们大部分时间觅食的时期相吻合。长期以来，一个相对较小的社区仍然与鱼类养殖场互动。因此，这些人对如何利用养鱼业有了深入的了解。当考虑沿海管理计划时，场地保真度和居住模式的这种异质性非常相关。

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  • 来源
    《Marine biology》 |2012年第10期|p.2161-2172|共12页
  • 作者

    Bruno Diaz Lopez;

  • 作者单位

    Bottlenose Dolphin Research Institute (BDRI), Via Diaz 4,Golfo Aranci (Sardinia), Italy;

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