Food habits of Atlantic white-sided dolphins (Lagenorhynchus acutus) off the coast of New England

Craddock, James E. and Polloni, Pamela T. and Hayward, Brett and Wenzel, Frederick (2009) Food habits of Atlantic white-sided dolphins (Lagenorhynchus acutus) off the coast of New England. Fishery Bulletin, 107(3), pp. 384-394.

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Abstract

Although the Atlantic white-sided dolphin (Lagenorhynchus acutus) is one of the most common dolphins off New England, little has been documented about its diet in the western North Atlantic Ocean. Current federal protection of marine mammals limits the supply of animals for investigation to those incidentally caught in the nets of commercial fishermen with observers aboard. Stomachs of 62 L. acutus were examined; of these 62 individuals, 28 of them were caught by net and 34 were animals stranded on Cape Cod. Most of the net-caught L. acutus were from the deeper waters of the Gulf of Maine. A single stomach was from the continental slope south of Georges Bank. At least twenty-six fish species and three cephalopod species were eaten. The predominant prey were silver hake (Merluccius bilinearis), spoonarm octopus (Bathypolypus bairdii), and haddock (Melanogrammus aeglefinus). The stomach from a net-caught L. acutus on the continental slope contained 7750 otoliths of the Madeira lanternfish (Ceratoscopelus maderensis). Sand lances (Ammodytes spp.) were the most abundant (541 otoliths) species in the stomachs of stranded L. acutus. Seasonal variation in diet was indicated; pelagic Atlantic herring (Clupea harengus) was the most important prey in summer, but was rare in winter. The average length of fish prey was approximately 200 mm, and the average mantle length of cephalopod prey was approximately 50 mm.

Item Type: Article
Title: Food habits of Atlantic white-sided dolphins (Lagenorhynchus acutus) off the coast of New England
Personal Creator/Author:
CreatorsEmail
Craddock, James E.
Polloni, Pamela T.
Hayward, Brett
Wenzel, Frederick
Refereed: Yes
Journal or Publication Title: Fishery Bulletin
Volume: 107
Number: 3
Page Range: pp. 384-394
Date: 2009
ISSN: 0090-0656
Issuing Agency: United States National Marine Fisheries Service
Subjects: Biology
Ecology
Fisheries
Item ID: 8794
Depositing User: Patti M. Marraro
Date Deposited: 11 Jun 2012 18:30
Last Modified: 02 Jan 2014 19:22
URI: http://aquaticcommons.org/id/eprint/8794

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