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首页> 外文期刊>Fisheries Management and Ecology >Effects of fisheries zoning and environmental characteristics on population parameters of the tambaqui (Colossoma macropomum) in managed floodplain lakes in the Central Amazon
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Effects of fisheries zoning and environmental characteristics on population parameters of the tambaqui (Colossoma macropomum) in managed floodplain lakes in the Central Amazon

机译：渔业区划和环境特征对中部亚马逊河漫滩湖泊中坦巴基种群的参数的影响

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摘要

Fisheries zoning and the influence of biotic and abiotic factors in the spatial distribution of Colossoma macropomum (Cuvier) in the Piagacu-Purus Sustainable Development Reserve, Central Amazon, during 2012-2013 were evaluated. The relative abundance and population parameters of the C.macropomum were compared between conservation (no-take zone) and fishing (open to fishing zone) lakes. The fish were collected by experimental fishing in 2012 and 2013. A total of 296 individuals were captured, most of which were from the conservation lakes (62.8%). Higher proportions of larger adults and individuals were found in the conservation lakes, although no significant difference in the average C.macropomum catch-per-unit-effort was found between the lake categories. Abundance was positively influenced by zooplankton density (r(2)=0.53, P0.03). Therefore, it is hypothesised that conservation lakes may serve as refugia for juveniles due to the high availability of planktonic food available during the dry season. Although there were environmental differences between the two lake types, the relative success of management models that use no-take zones in freshwater habitats was highlighted. Finally, the importance of zooplankton as a factor in the distribution of C.macropomum among floodplain lakes was emphasised.
机译：评估了2012-2013年中部亚马逊地区Piagacu-Purus可持续发展保护区的渔业区划以及生物因子和非生物因子对巨像（Cuvier）空间分布的影响。比较了保护性（无采伐区）和捕捞（对捕捞区开放）湖泊之间的巨鳄的相对丰度和种群参数。在2012年和2013年，通过实验性捕鱼收集了这些鱼。总共捕获了296个人，其中大多数来自保护性湖泊（62.8％）。在保护湖中发现了较大比例的较大的成年人和个体，尽管在这两个湖类之间，平均C. macroropomum每单位工作量的捕捞量没有显着差异。浮游动物密度对丰度有积极影响（r（2）= 0.53，P <0.03）。因此，有假设认为，由于干旱季节可利用的浮游性食物数量很高，因此保护湖可作为青少年的避难所。尽管两种类型的湖泊之间存在环境差异，但强调了在淡水生境中使用无采区的管理模式的相对成功。最后，强调了浮游动物作为洪泛平原湖泊中巨鳄的分布因素的重要性。

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