填补银翼鲇科鲶鱼生态学知识的空白(Ostariophysi:鲇形目):Trachelyichthys exilis的首次数据

IF 0.7 4区 环境科学与生态学 Q4 ECOLOGY
T. M. Freitas, J. Zuanon
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引用次数: 0

摘要

摘要首次描述了黄颡鱼的食性,并对其性成熟时的生长类型和大小进行了补充评论。我们分析了2002年旱季在漂浮的草本植被中用围网收集的来自阿曼保护区(巴西亚马逊州)的42个标本。胃内容物显示出主要的肉食性习性(倾向于吃鱼),等长生长型,成熟时大小约为5.5厘米标准长度。根据被捕食的猎物的生物学特征,我们推测,在黄昏/夜晚,T.exilis在草本植物的根丛周围和中间积极觅食,捕食夜间活动的动物,如小型鱼类和水生无脊椎动物,和/或靠近水面,白天活动的猎物通常在那里休息。我们的研究结果提供了必要的信息,以填补有关牛尾鱼自然史,特别是营养生态学的知识空白。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Filling gaps in the ecological knowledge on Auchenipteridae catfishes (Ostariophysi: Siluriformes): first data for Trachelyichthys exilis
ABSTRACT The feeding habit of Trachelyichthys exilis is described for the first time, with additional comments on its growth type and size at sexual maturity. We analyzed 42 specimens from the Amanã Reserve (Amazonas state, Brazil) collected with a seine net amidst stands of floating herbaceous vegetation during the dry season of 2002. Stomach contents revealed a predominantly carnivorous habit (tending to piscivorous), an isometric growth type, and size at maturity around 5.5 cm standard length. Based on the biological characteristics of the consumed prey, we presume that T. exilis forage actively during the twilight/night around and among the root tangle of herbaceous vegetation, preying upon nocturnally active animals such as small fishes and aquatic invertebrates, and/or close to the water surface, where diurnally active prey usually rests. Our findings provide essential information to fill knowledge gaps on the natural history of auchenipterid catfishes, especially on trophic ecology.
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来源期刊
Acta Amazonica
Acta Amazonica PLANT SCIENCESECOLOGYZOO-ECOLOGY
CiteScore
1.70
自引率
0.00%
发文量
34
审稿时长
22 weeks
期刊介绍: Acta Amzonica is a multidisciplinary, peer-reviewed, open access, free-of-charge scientific journal for research in and about the Amazon region, published since 1971 by the Instituto Nacional de Pesquisas da Amazônia - INPA, in Brazil. The journal publishes quarterly issues containing articles and short communications in English across a broad range of disciplines, including Agronomy and Forestry, Animal Sciences and Fisheries, Biodiversity and Conservation, Biotechnology, Chemistry and Pharmacology, Environmental Sciences, Food Sciences, Geosciences, Health Sciences, Human and Social Sciences, and Materials Technology.
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