Trophic ecology of the dusky catshark Bythaelurus canescens (Gunther, 1878) (Chondrychthyes: Scyliorhinidae) in the southeast Pacific Ocean

López S.; Zapata-Hernandez, G; Bustamante, C; Sellanes J.; Melendez, R

Abstract

Feeding and stable isotope analyses for Bythaelurus canescens individuals were conducted to describe the diet of B. canescens as well as infer their potential prey species in the community. Stomach content analysis and mixing models by ratio isotopes composition were used to infer the food habits and calculate the trophic level of the dusky catshark, B. canescens. The results showed siphonophores and cephalopods as the most important food in the diet (67.9 and 20.2%, respectively). Calculated trophic level was 3.9, indicating that B. canescens is a meso-predator in the upper continental slope communities off Chile. By mixing models based on isotope data it can be inferred that the probabilities of the consumption cephalopods and siphonophores would be 36.7 and 15.2%, respectively.

Más información

Título según WOS: Trophic ecology of the dusky catshark Bythaelurus canescens (Gunther, 1878) (Chondrychthyes: Scyliorhinidae) in the southeast Pacific Ocean
Título según SCOPUS: Trophic ecology of the dusky catshark Bythaelurus canescens (Günther, 1878) (Chondrychthyes: Scyliorhinidae) in the southeast Pacific Ocean
Título de la Revista: JOURNAL OF APPLIED ICHTHYOLOGY
Volumen: 29
Número: 4
Editorial: Wiley
Fecha de publicación: 2013
Página de inicio: 751
Página final: 756
Idioma: English
URL: http://doi.wiley.com/10.1111/jai.12151
DOI:

10.1111/jai.12151

Notas: ISI, SCOPUS