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首页> 外文期刊>Marine ecology progress series >Sea-cage aquaculture impacts market and berried lobster (Homarus americanus) catches
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Sea-cage aquaculture impacts market and berried lobster (Homarus americanus) catches

机译：海水养殖对市场造成影响，龙虾（美洲大螯虾）的捕获量

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Sea-cage finfish aquaculture frequently spatially overlaps and competes with traditional fisheries and ecologically important habitats in the coastal zone. Yet only few empirical studies exist on the effects of sea-cage aquaculture on commercially important fish and shellfish species, due to the lack of data. We present results from a unique collaboration between scientists and lobster fishers in Port Mouton Bay, Atlantic Canada, providing 11 yr of market (market-sized) lobster catches and berried (ovigerous) lobster counts in 5 spatially resolved areas adjacent to a sea-cage finfish farm. The time series covered 2 stocked (feed) and 2 non-stocked (fallow) periods, allowing us to test for the effects of feed versus fallow periods. Our results indicate that average market lobster catch per unit effort (CPUE) was significantly reduced by 42% and berried lobster counts by 56% in feed compared to fallow periods. Moreover, both market and berried lobster CPUE tended to be lower in fishing region 2, which included the fish farm, and higher in region 5, furthest away from the farm. Bottom temperature measurements in one region suggest that differences in CPUE between feed and fallow periods were not driven by temperature, and that berried lobsters may be more sensitive to both aquaculture and temperature than market lobster. We discuss possible mechanisms of how finfish farms as well as other abiotic and biotic factors such as habitat quality and temperature could affect lobster catch. Our results provide critical information for the management of multiple human uses in the coastal zone and the conservation of shellfish habitats that sustain traditional fisheries.
机译：海鱼有鳍鱼类的养殖经常在空间上重叠，并与沿海地区的传统渔业和重要生态栖息地竞争。由于缺乏数据，关于海水笼养对商业上重要的鱼类和贝类物种影响的经验研究很少。我们介绍了科学家和加拿大大西洋省木桐湾龙虾捕捞者之间独特合作的结果，提供了11年的市场（市场规模）龙虾捕捞量和与海笼相邻的5个空间分辨区域中的卧龙虾（剧烈）数量鳍鱼农场。时间序列涵盖2个放养（饲料）和2个非放养（休养）时期，使我们能够测试饲料与休耕期的影响。我们的结果表明，与休耕期相比，饲料中平均龙虾平均单位捕获量（CPUE）显着减少了42％，浆果龙虾的数量减少了56％。此外，在包括养鱼场在内的第2捕鱼区，市场龙虾和带座龙虾CPUE均趋于较低，而距离该渔场最远的第5区则较高。在一个区域的底部温度测量结果表明，进食期和休耕期之间CPUE的差异不是受温度驱动的，与水龙虾相比，埋藏的龙虾对水产养殖和温度的敏感性更高。我们讨论了鱼类养殖场以及其他非生物和生物因素（例如栖息地质量和温度）如何影响龙虾捕获的可能机制。我们的结果为管理沿海地区多种人类用途以及维持传统渔业的贝类栖息地提供了重要信息。

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