an ordination technique for fish diet comparisons

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ID: 244044
2000
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Abstract
The frequency of nine food types in the guts of 58 fish species from the Paraná River and its floodplain was compared using similarity definition. A synthetic table ordered on the basis of this definition, with fish species on axis y, and food types on axis x, enabled easy reading numerous kinds of information on feeding ecology of fish in the catchment. For example: 1) which fish species were generalists, specialists or opportunists, 2) those classified as herbivorous species consumed small amounts of animal food, 3) that fish consumed any food type that contained transformed solar energy and matter, 4) what are food preferences dependent on fish taxonomic affinity. The possibility of employing synthetic tables for investigating spatial and temporal variation in fish diet has also been indicated.
As freqüência de ocorrência de nove tipos de itens alimentares em estômagos de 58 espécies de peixes do rio Paraná e sua planície alagável são comparadas com base nas definições de similaridade. É proposta uma tabela sintética baseada nessas definições, com as espécies de peixes no eixo y e os tipos de alimento no eixo x, permitindo uma visualização mais clara de diversos tipos de informações sobre a ecologia alimentar de peixes na bacia. Entre as informações, destacam-se (i) quais espécies são generalistas, especialistas ou oportunistas; (ii) que espécies classificadas como herbívoras consomem também itens de origem animal; (iii) que os peixes consomem qualquer tipo de alimento que contenha energia; (iv) que a preferência alimentar depende das afinidades taxonômicas. A possibilidade de empregar tabelas sintéticas na investigação de variações espaciais e temporais na dieta de peixe é também indicada.
Reference Key
penczak2000brazilianan Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Tadeusz Penczak;Angelo A. Agostinho;Norma S. Hahn
Journal current drug delivery
Year 2000
DOI
10.1590/S1516-89132000000100013
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000100013
Keywords
fish feeding floodplain

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