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Diet, behaviour and reproduction of the whelk Buccinum undatum in the northern Gulf of St. Lawrence, eastern Canada

Diet, behaviour and reproduction of the whelk Buccinum undatum in the northern Gulf of St.... 227 116 116 3 3 J. H. Himmelman J. -R. Hamel Département de biologie et GIROQ (Groupe interuniversitaire de recherches océanographiques du Québec) Université Laval G1K 7P4 Québec Canada Abstract We examine the use of prey resources and seasonal variations in behaviour and reproduction for the whelk Buccinum undatum , the most abundant subtidal carnivore in the northern Gulf of St. Lawrence. Whelks used in this study were collected in the Mingan Islands in 1987 and 1988. The proportion of whelks with food in their stomachs varies seasonally and further with habitat, being greatest on sandy bottoms. It decreases at the onset of breeding in the spring and is generally low through the summer. Fragments of certain organisms (e.g. polychaetes, bivalves, urchins) in whelk stomachs suggest that they are active predators. However, predation is virtually never seen in the field. Other organisms in the stomachs, infrequent feeding, and their high mobility and capacity to detect and locate dead animals on the bottom suggest that whelks are carrion feeders. However, the amount of carrion available is probably insufficient to meet the needs of the biomass of whelks present in these waters. An interaction with seastars may contribute to the whelk's diet. They frequently approach seastars which are extracting bivalves from sediment bottoms and may benefit by feeding on prey remains left by seastars or by foraging in sediments recently disturbed by seastars. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Marine Biology Springer Journals

Diet, behaviour and reproduction of the whelk Buccinum undatum in the northern Gulf of St. Lawrence, eastern Canada

Marine Biology , Volume 116 (3) – Jul 1, 1993

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References (18)

Publisher
Springer Journals
Copyright
Copyright © 1993 by Springer-Verlag
Subject
Life Sciences; Biomedicine general; Oceanography; Ecology; Microbiology; Zoology
ISSN
0025-3162
eISSN
1432-1793
DOI
10.1007/BF00350059
Publisher site
See Article on Publisher Site

Abstract

227 116 116 3 3 J. H. Himmelman J. -R. Hamel Département de biologie et GIROQ (Groupe interuniversitaire de recherches océanographiques du Québec) Université Laval G1K 7P4 Québec Canada Abstract We examine the use of prey resources and seasonal variations in behaviour and reproduction for the whelk Buccinum undatum , the most abundant subtidal carnivore in the northern Gulf of St. Lawrence. Whelks used in this study were collected in the Mingan Islands in 1987 and 1988. The proportion of whelks with food in their stomachs varies seasonally and further with habitat, being greatest on sandy bottoms. It decreases at the onset of breeding in the spring and is generally low through the summer. Fragments of certain organisms (e.g. polychaetes, bivalves, urchins) in whelk stomachs suggest that they are active predators. However, predation is virtually never seen in the field. Other organisms in the stomachs, infrequent feeding, and their high mobility and capacity to detect and locate dead animals on the bottom suggest that whelks are carrion feeders. However, the amount of carrion available is probably insufficient to meet the needs of the biomass of whelks present in these waters. An interaction with seastars may contribute to the whelk's diet. They frequently approach seastars which are extracting bivalves from sediment bottoms and may benefit by feeding on prey remains left by seastars or by foraging in sediments recently disturbed by seastars.

Journal

Marine BiologySpringer Journals

Published: Jul 1, 1993

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