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

S. Lopez, G. Zapata-Hernández, C. Bustamante, J. Sellanes, R. Meléndez

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Summary: 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.

Original languageEnglish
Pages (from-to)751-756
Number of pages6
JournalJournal of Applied Ichthyology
Volume29
Issue number4
DOIs
Publication statusPublished - 1 Aug 2013

ASJC Scopus subject areas

  • Aquatic Science

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