Data/hora: 06/06/2024 15:47:49

Provedor de dados: | 42
País: | Brazil
Título: | Do the changes in temperature and light affect the functional response of the benthic mud snail Heleobia australis (Mollusca: Gastropoda)?
Autores: | MAGALHÃES,THAISA R.F.; NEVES,RAQUEL A.F.; VALENTIN,JEAN L.; FIGUEIREDO,GISELA M.
Data: | 2014-09-01
Ano: | 2014
Palavras-chave: | Hydrobiid; Ingestion rates; Estuarine system; Gastropod.
Resumo: | The aim of this study was to determine the influence of temperature increase combined to conditions of light incidence on functional response of Heleobia australis. Experiments were conducted using nine to ten food concentrations for each treatment: 20°C without light; 30°C without light and, 30°C under low light intensity. For each experiment, the functional response type III (sigmoidal) was fitted and equation parameters were determined. Results suggest that, if the sediment temperature increases, H. australis will not have its ingestion rates affected negatively, whilst its feeding behavior seems to be negatively affected by light. Ingestion rates estimated for organic content in the Guanabara Bay were: 0.34 µgC ind–1h–1 at 20°C without light, 1.44 µgC ind–1h–1 at 30°C without light and 0.64 µgC ind–1h–1 at 30°C under light incidence. Higher ingestion rates were estimated at the high temperature, even under light incidence, and temperature seems to have outweighed the light effect. In contrast, if higher carbon content is considered, despite high temperature, the experiment conducted with light incidence showed lower ingestion rates than those from the experiment at 20°C without light. This study provides the first quantification of H. australis ingestion rates and the effects that changes in temperature and light have on its feeding behavior.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301197
Editor: | Academia Brasileira de Ciências
Relação: | 10.1590/0001-3765201420130093
Formato: | text/html
Fonte: | Anais da Academia Brasileira de Ciências  v.86 n.3 2014
Fonte: | info:eu-repo/semantics/openAccess