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首页> 外文期刊>Fisheries Research >Habitat selection and population spreading of the horned octopus Eledone cirrhosa (Lamarck, 1798) in Galician waters (NW Atlantic)
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Habitat selection and population spreading of the horned octopus Eledone cirrhosa (Lamarck, 1798) in Galician waters (NW Atlantic)

机译：有角章鱼Eledone cirrhosa（拉马克，1798年）在加利西亚海域（西北大西洋）的生境选择和种群扩散

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摘要

Distribution and abundance of Eledone cirrhosa, a benthic octopus inhabiting the NE Atlantic and Mediterranean Sea, were studied in north-western Iberian waters. Capture data collected during two series of surveys, carried out during summer-autumn in Galician waters (NE Atlantic Ocean), were analyzed. "Galicia" series (G1, G2 and G3) extended along the Galician continental shelf from Ribadeo Ria to Mino Estuary in 1974, 1975 and 1976, and "Cigala" series (C 06, C 07 and C 08) were recorded from Finisterre Cape to Mino Estuary in 2006, 2007 and 2008. Data from a total of 276 trawls, ranging from 50 to 500 m, and corresponding environmental parameters were transferred to a Geographic Information System (GIS), providing a platform for a spatial-temporal analysis. Bathymetric distribution, variations in abundance, biomass and average body size of the octopus Eledone cirrhosa were analyzed through depth strata and seasons. Higher abundances were obtained in the intermediate strata and in autumn, most likely due to new recruits. Largest sizes of E. cirrhosa were collected in summer and average weight increased with depth throughout the sampling period. These variations of biomass and abundance suggest the existence of segregation by size and agree with the landings pattern of the trawlers fishery, in which E. cirrhosa is not a target species. No significant differences were found between G1 and G2 surveys or between C ones, performed at the same dates, suggesting that the polled data of surveys are useful tools for representing phenological stages of the species. Collected data and developed models illustrate a migratory behaviour during the reproductive period. Among the eight environmental variables considered, only the latitude remained significant in all developed models, suggesting an effect of photoperiod over the species distribution. (C) 2013 Elsevier B.V. All rights reserved.CT 1st Triennial International Symposium of the Cephalopod-International-Advisory-Council (CIAC)CY OCT 29-NOV 02, 2012CL Florianopolis, BRAZILSP Cephalopod Int Advisory Council
机译：在伊比利亚西北部水域研究了居住在东北大西洋和地中海沿岸的底栖章鱼伊勒酮（Eledone cirrhosa）的分布和丰度。分析了在夏季-秋季在加利西亚水域（东北大西洋）进行的两个系列调查中收集的捕获数据。 1974年，1975年和1976年，“加利西亚”系列（G1，G2和G3）沿着加利西亚大陆架从里瓦德奥里亚延伸到米诺河口，“菲加拉尔”系列（C 06，C 07和C 08）记录于Finisterre Cape。分别在2006年，2007年和2008年到达Mino河口。来自总共276艘拖网的数据（范围从50到500 m）以及相应的环境参数被传输到了地理信息系统（GIS），为时空分析提供了一个平台。通过深度层次和季节分析了章鱼Eledone cirrhosa的等深线分布，丰度，生物量和平均体重的变化。在中层和秋季获得了更高的丰度，这很可能是由于新兵。夏季采集了最大尺寸的大肠埃希菌，平均体重随着整个采样期的增加而增加。生物量和丰度的这些变化表明存在大小隔离，并与拖网渔船的着陆模式一致，在该拖网渔船中，库拉肠埃希氏菌不是目标物种。在相同的日期进行的G1和G2调查之间或C调查之间没有发现显着差异，这表明调查的轮询数据是代表物种物候阶段的有用工具。收集的数据和开发的模型说明了生殖期的迁徙行为。在考虑的八个环境变量中，在所有已开发的模型中只有纬度仍然很重要，这表明光周期对物种分布具有影响。 （C）2013 Elsevier B.V.保留所有权利.CT第一届三年一次的头足纲动物国际咨询委员会（CIAC）CY OCT 2012年11月29日CL巴西弗洛里亚诺波利斯（CL Florianopolis），巴西头足纲生物咨询委员会

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