Data/hora: 02/06/2024 05:23:38

Provedor de dados: | 83
País: | Brazil
Título: | Invasive non-native species of fish in upper Paraná river Basin, Brazil: variations of caloric content in Cichla kelberi
Autores: | Espínola,Luis Alberto; Júlio Junior,Horácio Ferreira; Benedito,Evanilde.
Data: | 2012-01-01
Ano: | 2012
Palavras-chave: | Condition factor; Energetic density; Gonadal maturation; Paraná and Baía Rivers.
Resumo: | The allocation of assimilated energy may be influenced by seasonal changes, growth, and reproductive cycle of fish, food consumption and environmental conditions. The objective of this research was to evaluate the energetic variations of Cichla kelberi in the upper Paraná River floodplain, analyzing the caloric content in muscles, gonadosomatic index (GSI), and the condition factor between assessed systems, sex, and stage of gonadal maturation. The results obtained in the present study permit assuring that this is a species that efficiently converts the resources of the environment into energy. Although presenting higher condition factor in the environment where there is a greater ease in getting food (Paraná subsystem), the energy identified in the muscles was the same in both subsystems. During the process of gonadal maturation there is optimization in energy accumulation in the muscles of females, before and after reproductive period, and somatic growth occurs significantly when the individual is not reproducing. Further detailed studies on ecological mechanisms influencing the success of the species, as the presence of competitors and preference for native preys, are needed to implement effective management measures aimed at preventing that the species proliferation in the environment is even more damaging to local biodiversity.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000200015
Editor: | Sociedade Brasileira de Ictiologia
Relação: | 10.1590/S1679-62252012005000002
Formato: | text/html
Fonte: | Neotropical Ichthyology  v.10 n.2 2012
Fonte: | info:eu-repo/semantics/openAccess