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首页> 外文期刊>Conservation Biology >Effects of desertification caused by Lithophaga lithophaga (Mollusca) fishery on littoral fish assemblages along rocky coasts of southeastern Italy
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Effects of desertification caused by Lithophaga lithophaga (Mollusca) fishery on littoral fish assemblages along rocky coasts of southeastern Italy

机译：石斑鱼（Lithophaga lithophaga，Mollusca）渔业引起的荒漠化对意大利东南部多岩石海岸沿海鱼类种群的影响

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摘要

We surveyed shallow, rocky reefs in southwestern Apulia (Mediterranean Sea) to assess the effects on coastal fish assemblages of the date mussel ( Lithophaga lithophaga) fishery, an illegal practice that strips the rocky reef bare. We visually sampled fish four times over 15 months at three locations, one affected by date-mussel fishery and two controls. The fish assemblage at the affected location differed significantly from those at the control locations over all sampling times. Herbivorous fishes, sparids, and labrids (genus Symphodus) contributed most to the differences between the affected location and controls. Lower densities of Symphodus spp. were observed at the affected location, whereas detritivorous fishes were recorded exclusively at control sites. Small serranids and sparids showed temporal trends that differed between the affected location and the control locations. Our results suggest that the date-mussel fishery affects fish assemblages chiefly through reduction of arborescent macroalgae (contributing to habitat complexity and primary production) and emphasize the need for more effective policing against this destructive practice.
机译：我们调查了西南普利亚（地中海）的浅礁岩，以评估枣贻贝（Lithophaga lithophaga）渔业对沿海鱼类种群的影响，这是剥夺裸礁的非法行为。我们在15个月内对三个地点的鱼进行了四次视觉采样，其中一个受到枣贻贝捕捞的影响，另外两个则受到控制。在所有采样时间中，受影响位置的鱼类组合与对照位置的鱼类组合显着不同。食草鱼类，扁桃体和扁唇（Symphodus属）对受影响地区和控制区之间的差异起了最大作用。密度较低的Symphodus spp。在受灾地点观察到了有害鱼类，而在控制地点只记录了有害鱼类。小的蛇形和铁锹显示出时间趋势，在受影响的位置和控制的位置之间有所不同。我们的结果表明，枣贻贝渔业主要通过减少乔木大型藻类（造成栖息地复杂性和初级生产）来影响鱼类种群，并强调有必要针对这种破坏性行为采取更有效的警务措施。

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