Data/hora: 01/06/2024 16:24:26

Provedor de dados: | Acta Scientiarum: Biological Sciences
País: | Brazil
Título: | Trophic structure of fish assemblages associated with macrophytes in lakes of an abandoned meander on the middle river Purus, brazilian Amazon
Autores: | Suçuarana, Monik da Silveira; Virgílio, Lucena Rocha; Vieira, Lisandro Juno Soares.
Data: | 2016-07-21
Ano: | 2016
Palavras-chave: | 2.05.02.00-1 Ecologia diet; Neotropical ichthyofauna; Spatial variation; Temporal variation Ecologia.
Resumo: | The trophic structure of fish assemblages associated with banks of aquatic macrophytes in abandoned meander lakes on the river Purus is investigated. Comparisons between lakes and between different periods of the hydrological cycle are undertaken. Fish samples were collected in six lakes during the rainy (February), ebb (May) and dry (September) season in 2012. Fish stomach contents were analyzed by frequency of occurrence and volume methods, combined in the Feeding Index (IAi). Fish species were included in nine trophic categories, based on IAi rates. The richness and abundance of fish species, by trophic category, was influenced by temporal variations, with no significant spatial variation. Some species changed their diets and were included in different trophic categories according to the period and lake under analysis. Specialist species have also been identified, but failed to change their diets. Differences may be due to the characteristics of macrophytes banks and to the flooding regime which change the availability of food resources.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês

Identificador:

http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/28973

10.4025/actascibiolsci.v38i1.28973

Editor: | Universidade Estadual De Maringá
Relação: | http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/28973/pdf
Formato: | application/pdf

Fonte:

Acta Scientiarum. Biological Sciences; v. 38, n. 1 (2016); 37-46

Acta Scientiarum. Biological Sciences; v. 38, n. 1 (2016); 37-46

1807-863X

1679-9283