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首页> 外文期刊>Latin american journal of aquatic research >Dietary composition and trophic level of Hypanus marianae (Myliobatiformes: Dasyatidae), captured off Pernambuco coast, Brazil
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Dietary composition and trophic level of Hypanus marianae (Myliobatiformes: Dasyatidae), captured off Pernambuco coast, Brazil

机译：捕获于巴西伯南布哥海岸的海豚（Hypanus marianae（Myliobatiformes：Dasyatidae））的饮食组成和营养水平

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ABSTRACT Hypanus marianae, a stingray endemic to Brazil, inhabits coastal coral reef areas occurring in the landings of artisanal fisheries. The present study aimed to characterize the diet of this species captured off Pernambuco. We obtained 77 stomachs with contents: 52.27% female, 47.72% male. DW ranged from 15 to 37.80 cm mean of 26.53 ± 4.82 cm. Four higher taxonomic prey categories were identified: Arthropoda, Annelida, Chordata and Sipuncula. The most important item in the diet was Polychaeta (40.65% IRI), followed by Leptochela serratorbita (30.35% IRI), suborder Dendrobranchiata (10.18% IRI), order Isopoda (4.19% IRI), and Meiosquilla schmitti (3.56% IRI). H. marianae displays specialized predatory habit (BA = 0.06) primarily based on shrimps (42.36% IRI) and polychaetes (40.65% IRI). There was no significant difference in the diet by sex or in sexual development stages. However, neonates fed on decapods crustaceans (70.68%) and polychaetes (17.09%). For immatures, decapod crustaceans (69.5%) and polychaetes (25.86%) made up most of their diet. The adults feed mainly on polychaetes (62.79%) and crustacean decapods (30.47%), with a slight increase of fish (5.46%). The trophic level (TL) estimated was based on stomach content analysis was 3.66 and estimated on the analysis of stable isotopes being 3.29, which classified the species as a mesopredator.
机译：摘要墨西哥的黄貂鱼（Hypanus marianae）是巴西特有的一种黄貂鱼，栖息在手工渔业上岸的沿海珊瑚礁地区。本研究旨在表征从伯南布哥州捕获的该物种的饮食。我们获得了77个胃，内容物：女性为52.27％，男性为47.72％。 DW从15到37.80 cm不等，平均值为26.53±4.82 cm。确定了四个更高的分类猎物类别：节肢动物，Annelida，Cordata和Sipuncula。饮食中最重要的食物是Polychaeta（40.65％IRI），其次是Leptochela serratorbita（30.35％IRI），亚目Dendrobranchiata（10.18％IRI），Isopoda（4.19％IRI）和Meiosquilla schmitti（3.56％IRI）。 H. marianae表现出专门的捕食习性（BA = 0.06），主要基于虾（42.36％IRI）和多毛cha（40.65％IRI）。按性别或性发育阶段的饮食差异无统计学意义。然而，新生儿以十足纲甲壳类动物（70.68％）和多毛et（17.09％）为食。对于未成熟的人来说，十足类甲壳动物（69.5％）和多毛类（25.86％）构成了他们的大部分饮食。成虫主要以多毛cha（62.79％）和甲壳类十足纲动物（30.47％）为食，鱼的数量略有增加（5.46％）。根据胃含量分析估计的营养水平（TL）为3.66，根据稳定同位素的分析估计的营养水平为3.29，将其归类为中控因子。

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