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首页> 外文期刊>Fisheries Science >Spatial and seasonal variation in a target fishery for spotted eagle ray Aetobatus narinari in the southern Gulf of Mexico
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Spatial and seasonal variation in a target fishery for spotted eagle ray Aetobatus narinari in the southern Gulf of Mexico

机译：墨西哥湾南部斑点鹰AAetobatus narinari的目标渔业的空间和季节性变化

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摘要

The target fishery for the spotted eagle ray Aetobatus narinari in the southern Gulf of Mexico is little known. The landings of four small-scale vessels at two fishing localities were sampled and fishermen were interviewed in 2009. Rays landed at Campeche [mean ± standard deviation (SD) 1204 ± 225.3 mm disc width (DW)], fished at 30–50 km from the shore, were larger than rays landed at Seybaplaya (924 ± 206.5 mm DW), fished at 8–15 km from the shore. Ray catches were male biased off Campeche and female biased off Seybaplaya. Catch rate off Campeche was 6.6 (±4.9) rays per vessel trip and off Seybaplaya was 3.0 (±2.9) rays per vessel trip. Fishermen stated that catches of A. narinari are positively influenced by winter cold fronts, turbidity, low sea temperature, and new moon phase, and negatively influenced by the presence of cownose rays Rhinoptera bonasus. Spatial variation in size composition, and sex and maturity ratios of A. narinari were evident between sites. Catch rates of A. narinari varied with individual fisherman and seasonally between months with winter cold fronts versus warmer months. Fishermen reported a general decline in catches of A. narinari over recent decades in this region.
机译：在墨西哥湾南部发现鹰Aetobatus narinari的目标渔业鲜为人知。 2009年对在两个捕捞地点的四艘小型渔船的着陆进行了采样，并接受了渔民的采访。射线降落在坎佩切州[平均±标准偏差（SD）1204±225.3 mm盘宽（DW）]，在30–50 km处捕捞离岸边的距离大于在离岸边8–15公里处捕捞的Seybaplaya的射线（924±206.5毫米DW）。射线捕获物是坎佩切州的男性偏爱和塞巴普拉亚州的女性偏爱。坎佩切河每船航行的捕获率为6.6（±4.9）射线，而塞巴亚匹亚河每船航行的捕获率为3.0（±2.9）射线。渔民说，A。narinari的渔获量受到冬季冷锋，浊度，低海水温和新月相的正向影响，而受到牛鼻rays Rhinoptera bonasus的存在则有负影响。站点之间的大小组成空间变异，以及A. narinari的性别和成熟率。纳里纳虾的捕获率随个体渔民的不同而不同，在冬季寒冷季节相对温暖月份的月份之间季节性变化。渔民报告说，该地区近几十年来纳里氏虾的捕获量普遍下降。

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