Variação temporal e espacial na dieta de Trachelyopterus galeatus (Siluriformes, Auchenipteridae) em dois reservatórios no semiárido Neotropical

IF 0.5 4区生物学 Q4 ZOOLOGY

Iheringia Serie Zoologia Pub Date : 2017-11-27 DOI:10.1590/1678-4766E2017040

J. M. Sousa, Jean Carlos de Oliveira, Jônnata Fernandes de Oliveira, Luzia Geize Fernandes Rebouças, José Luís Corrêa Novaes, R. Costa, Danielle Peretti

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引用次数: 6

Abstract

Temporal and spatial variation in diet Trachelyopterus galeatus (Siluriformes, Auchenipteridae) in two reservoirs in the semi-arid Neotropical. Fish feeding provides data for discussion of theoretical aspects serving purposes as the basic knowledge of the biology of a species by understanding the trophic organization in each environment. The objective was to analyze the food composition and morphology associated with the eating habits of Trachelyopterus galeatus (Linnaeus, 1766) and evaluates the dietary changes over time. The collections of individuals took place on a quarterly basis, during the months of February, May, August and November 2013, through gillnets with different meshes distributed in eight points in the Santa Cruz reservoir and five points in the Umari reservoir, both located in the Rio Grande do Norte. From the items identified in diets were obtained the frequencies of occurrence and volumetric, combined in the calculation of Alimentary Index (IAi). The volumes of the items were ordered in NMDS and their differences tested by PERMANOVA. The contribution of each food item and differences between reservoirs was assessed by SIMPER analysis. The analysis of stomach contents allowed the classification of the species as carnivorous, noting there are significant temporal changes in the species diet, with the morphological characteristics according to the consumption of food items.

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新热带半干旱地区两个水库中galeatus Trachelyopterus galeatus (Siluriformes, Auchenipteridae)饮食的时空变化

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来源期刊

Iheringia Serie Zoologia 生物-动物学

CiteScore

1.00

自引率

0.00%

发文量

审稿时长

6-12 weeks

期刊介绍： The journal Iheringia, Série Zoologia, edited by the “Museu de Ciências Naturais” of the “Fundação Zoobotânica do Rio Grande do Sul”, publishes original research findings in zoology with emphasis on taxonomy, systematics, morphology, natural history, and community or population ecology of species from current Neotropical fauna. Scientific notes will not be accepted for publication. Species lists without a taxonomic approach, or that are not the result of studies on the ecology or natural history of communities will not normally be accepted. The same applies to identification keys of groups of taxa defined by political boundaries. Authors wishing to inquire about the scope of the journal or the suitability of a particular topic are encouraged to contact the Editorial Board prior to submission. Furthermore, articles with a main focus on agronomy, veterinary, zootechny or other areas involving applied zoology will not be accepted. Its abbreviated title is Iheringia, Sér. Zool., which should be used in bibliographies, footnotes and bibliographical references and strips.