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首页> 外文期刊>ICES Journal of Marine Science >Casitas: a location-dependent ecological trap for juvenile Caribbean spiny lobsters, Panulirus argus
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Casitas: a location-dependent ecological trap for juvenile Caribbean spiny lobsters, Panulirus argus

机译：Casitas：加勒比幼龙虾Panulirus argus的位置相关生态陷阱

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摘要

Casitas are artificial shelters used by fishers to aggregate Caribbean spiny lobsters (Panulirus argus) for ease of capture. However, casitas may function as an ecological trap for juvenile lobsters if they are attracted to casitas and their growth or mortality is poorer compared with natural shelters. We hypothesized that juvenile lobsters may be at particular risk if attracted to casitas because they are less able than larger individuals to defend themselves, and do not forage far from shelter. We compared the nutritional condition, relative mortality, and activity of lobsters of various sizes in casitas and natural shelters in adult and juvenile lobster-dominated habitats in the Florida Keys (United States). We found that the ecological effects of casitas are complex and location-dependent. Lobsters collected from casitas and natural shelters did not differ in nutritional condition. However, juvenile lobsters in casitas experienced higher rates of mortality than did individuals in natural shelters; the mortality of large lobsters did not differ between casitas and natural shelters. Thus, casitas only function as ecological traps when deployed in nursery habitats where juvenile lobsters are lured by conspecifics to casitas where their risk of predation is higher. These results highlight the importance of accounting for animal size and location-dependent effects when considering the consequences of habitat modification for fisheries enhancement.
机译：卡西塔斯（Casitas）是渔民用来聚集加勒比多刺龙虾（Panulirus argus）的人工庇护所，以便于捕获。但是，如果被龙虾吸引，它们可能会成为幼龙虾的生态陷阱，并且与自然庇护所相比，它们的生长或死亡率更差。我们假设，少年龙虾如果被龙虾吸引，可能会面临更大的风险，因为它们的防御能力不及大型龙虾，而且它们的觅食距离不远。我们比较了佛罗里达群岛（美国）成年和少年以龙虾为主的栖息地的casitas和天然庇护所中各种大小的龙虾的营养状况，相对死亡率和活性。我们发现，casitas的生态影响是复杂的且取决于位置。从casitas和自然庇护所收集的龙虾的营养状况没有差异。然而，与自然庇护所中的个体相比，尸体中的少年龙虾死亡率更高；大龙虾的死亡率在赌场和自然庇护所之间没有差异。因此，仅当在苗圃栖息地部署了幼体龙虾时，它们才被用作生态陷阱，因为它们被同种异体吸引到其捕食风险更高的幼体。这些结果凸显了在考虑栖息地改变对渔业改善的影响时，考虑到动物大小和位置相关影响的重要性。

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