<b> Influence of cage farming on feeding and reproductive aspects of <i>Pimelodus maculatus</i> Lacépède, 1803 (Siluriformes: Pimelodidae) in the Chavantes reservoir, Brazil </b> - doi: 10.4025/actascibiolsci.v36i1.

  • Heleno Brandão Universidade Estadual Paulista “Júlio de Mesquista Filho”
  • Julio Cesar de Oliveira Santana Universidade Estadual de Campinas
  • Igor Paiva Ramos Universidade Estadual Paulista “Júlio de Mesquista Filho”
  • Edmir Daniel Carvalho Universidade Estadual Paulista “Júlio de Mesquista Filho”

Resumo

This study evaluated the diet and reproductive aspects of the population of Pimelodus maculatus around net cage fish farming in order to assess the possible impacts of this activity. Monthly collections were performed from March 2008 to February 2009 on two populations: one close to the net cages (NC) and one from an area not influenced by these cages denominated the “reference site” (RS). Results of the Alimentary Index (AI), Gonadosomatic Index (GSI), reproductive potential and histological analysis were obtained for both NC and RS populations. The population from NC used leftover food (ration) that escapes from net cages as the main food item (99.3%). For the RS population, the detritus item was the more important food source (51.7%). The Detrended Correspondence Analysis (DCA) showed that the use of food resources was different between the two sites. The reproductive period of the species (indicated by the GSI) revealed that the population of the NC showed an extended reproductive period compared to RS. The histology of the ovaries indicated that the specimens in the NC were spawning capable. This study indicates that fish farming activities influence the species P. maculatus in the Chavantes reservoir by adding a new resource to the food web.

 

 

Downloads

Não há dados estatísticos.

Biografia do Autor

Julio Cesar de Oliveira Santana, Universidade Estadual de Campinas
Departamento de Morfologia. Área de biologia celular aplicada aos aspectos reprodutivos de peixes de água doce.
Publicado
2013-09-04
Como Citar
Brandão, H., Santana, J. C. de O., Ramos, I. P., & Carvalho, E. D. (2013). <b> Influence of cage farming on feeding and reproductive aspects of <i>Pimelodus maculatus</i> Lacépède, 1803 (Siluriformes: Pimelodidae) in the Chavantes reservoir, Brazil </b&gt; - doi: 10.4025/actascibiolsci.v36i1. Acta Scientiarum. Biological Sciences, 36(1), 41-50. https://doi.org/10.4025/actascibiolsci.v36i1.21039
Seção
Ecologia e Limnologia

 

0.6
2019CiteScore
 
 
31st percentile
Powered by  Scopus

 

 

0.6
2019CiteScore
 
 
31st percentile
Powered by  Scopus