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首页> 外文期刊>Zoologia (Curitiba) >Seasonal and spatial differences in feeding habits of the Neotropical otter Lontra longicaudis (Carnivora: Mustelidae) in a coastal catchment of southeastern Brazil
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Seasonal and spatial differences in feeding habits of the Neotropical otter Lontra longicaudis (Carnivora: Mustelidae) in a coastal catchment of southeastern Brazil

机译：巴西东南部沿海集水区新热带水獭Lontra longicaudis（食肉动物：鼬科）摄食习惯的季节性和空间差异

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摘要

The diet of the Neotropical otter Lontra longicaudis (Olfers, 1818) is one of the best known aspects of its biology throughout its distribution range. However, most dietary studies have been undertaken during short time periods, making it difficult to identify temporal patterns in the feeding behavior of the species. The present study aimed to describe the diet of L. longicaudis in the lower region of the Mambucaba Catchment, state of Rio de Janeiro, Brazil, during a three year period, based on analyses of spraints (feces). The results show fish as the main prey item (frequency of occurrence, FO = 85.78%), as already described in previous studies. Crustaceans were the second main prey (FO = 70.67%), occurring in the spraints during the whole year, however presenting a higher frequency of occurrence than fish in samples collected during some months. Anurans were the third most important prey item (FO = 9.56%) and mammals, birds and reptiles were preyed upon only rarely (less than 4%). Fish and crustaceans were present in the diet of the species throughout the year and frogs were important mostly from June to August (dry season). This higher rate of predation on amphibians during the drier months was probably related to the decrease of the main prey.
机译：新热带水獭Lontra longicaudis（Olfers，1818）的饮食是其整个分布范围内生物学最著名的方面之一。但是，大多数饮食研究都是在短时间内进行的，因此很难确定该物种摄食行为的时间规律。本研究旨在通过对扭伤（粪便）的分析，描述在三年内巴西里约热内卢州蒙博卡巴集水区下游地区的长绒金丝猴的饮食。结果表明，鱼类是主要的猎物（发生频率，FO = 85.78％），如先前研究中所述。甲壳类动物是第二大主要猎物（FO = 70.67％），全年发生在扭伤中，但是在某些月份中采集的样本中出现频率高于鱼类。无尾类动物是第三重要的猎物（FO = 9.56％），而哺乳动物，鸟类和爬行动物的猎物很少（少于4％）。全年在该物种的饮食中都存在鱼类和甲壳类动物，而青蛙主要在6月至8月（旱季）很重要。在较干燥的月份中，两栖动物的捕食率较高可能与主要猎物的减少有关。

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