Food sources for deep-sea fishes from the upper continental slope of the Grand Banks off Newfoundland

Houston, Kimberly Anne (1984) Food sources for deep-sea fishes from the upper continental slope of the Grand Banks off Newfoundland. Masters thesis, Memorial University of Newfoundland.

[img] [English] PDF (Migrated (PDF/A Conversion) from original format: (application/pdf)) - Accepted Version
Available under License - The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission.

Download (11Mb)
  • [img] [English] PDF - Accepted Version
    Available under License - The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission.
    (Original Version)

Abstract

Stomach contents and parasite faunas of 464 specimens of demersal fishes in 14 species were examined from the Carson Canyon region of the upper continental slope of the Grand Banks off Newfoundland. Individual species tended to feed either primarily on benthic invertebrates or on pelagic food items. Most pelagic predators also fed on benthopelagic organisms. Prevalence of parasites was 46 percent, with an average of 5.5 worms per fish. Prevalence of parasites was higher in benthic feeders (53.1%) than in pelagic fedders (28.9%). Relative abundance by group among benthic feeders was: Digenetic Trematoda 5.8%. Nematoda 53.1% and Acanthocephala 40.9%. Percent occurrence by group among pelagic feeders was: Digenetic Trematoda 27.8%, Nematoda 72.2% and Acanthocephala 0%. There were more species of benthic feeders (5) than pelagic feeders (3), but pelagic feeders were more abundant (pelagic 70.9%, benthic 20.5%). Benthic feeders were on average larger (x̄ = 270.6 g) than pelagic (x̄ = 130.6), but pelagic feeders represented a larger proportion of the biomass (pelagic 43.3%, benthic 25.94%).

Item Type: Thesis (Masters)
URI: http://research.library.mun.ca/id/eprint/4159
Item ID: 4159
Additional Information: Bibliography: leaves 47-54.
Department(s): Science, Faculty of > Biology
Date: 1984
Date Type: Submission
Geographic Location: Grand Banks of Newfoundland
Library of Congress Subject Heading: Deep-sea fishes--Grand Banks of Newfoundland--Food

Actions (login required)

View Item View Item

Downloads

Downloads per month over the past year

View more statistics