|
|
|
|
|
| Perissinotto, R.; Mayzaud, P.; Nichols, P. D.; Labat, J. P.. |
| Pyrosomas are colonial tunicates capable of forming dense aggregations. Their trophic function in the ocean, as well as their ecology and physiology in general, are extremely poorly known. During the ANTARES-4 survey (January and February 1999) their feeding dynamics were investigated in the south Indian Ocean. Results show that their in situ clearance rates may be among the highest recorded in any pelagic grazer, with up to 35 1 h(-1) per colony (length: 17.9 +/- 4.3 [SD] cm). Gut pigment destruction rates, estimated for the first time in this tunicate group, are higher than those previously measured in salps and appendicularians, ranging from 54 to virtually 100% (mean: 79.7 +/- 19.8 %) of total pigment ingested. Although individual colony ingestion... |
| Tipo: Text |
Palavras-chave: Pyrosoma; Pelagic tunicates; Gut pigment content; Gut turnover time; Ingestion rates; Clearance rates; Lipid content; Agulhas Front. |
| Ano: 2007 |
URL: https://archimer.ifremer.fr/doc/00236/34736/33179.pdf |
| |
|
|
| MAGALHÃES,THAISA R.F.; NEVES,RAQUEL A.F.; VALENTIN,JEAN L.; FIGUEIREDO,GISELA M.. |
| 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hydrobiid; Ingestion rates; Estuarine system; Gastropod. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301197 |
| |
|
|
|
