First Records of the Gymnoblastic Hydroid, Ichthyocodium sarcotretis , on the Copepod, Sphyrion lumpi , from Redfish of the Northwest Atlantic

The gymnoblastic colonial hydroid Ichthyocodium sarcotretis was found on the copepod Sphyrion lumpi on redfish from three areas of the northwest Atlantic: on copepods (three of ten) on deepwater redfish (Sebastes mentella) from about 200–500 m over great depths at the mouth of the Labrador Sea and,...

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Bibliographic Details
Published in:Journal of the Fisheries Research Board of Canada
Main Author: Templeman, Wilfred
Format: Article in Journal/Newspaper
Language:English
Published: Canadian Science Publishing 1973
Subjects:
General Medicine
Newfoundland
Irminger Sea
Labrador Shelf
Northeast Newfoundland Shelf
Labrador Sea
North Atlantic
Northwest Atlantic
Sebastes mentella
Copepods
Online Access:http://dx.doi.org/10.1139/f73-265
http://www.nrcresearchpress.com/doi/pdf/10.1139/f73-265
Description
Summary:The gymnoblastic colonial hydroid Ichthyocodium sarcotretis was found on the copepod Sphyrion lumpi on redfish from three areas of the northwest Atlantic: on copepods (three of ten) on deepwater redfish (Sebastes mentella) from about 200–500 m over great depths at the mouth of the Labrador Sea and, in bottom otter trawling, on copepods on S. mentella or possibly S. fasciatus from the Labrador Shelf (6 of 686) and the northeast Newfoundland Shelf (1 of 364). None were found on 492 S. lumpi from redfish taken on the continental shelf south and west of the northeast Newfoundland Shelf.The characteristics of the hydroid colonies and of their feeding polyps and reproductive hydranths and medusae are compared with published information on this hydroid found on the same hosts in the Irminger Sea and on the copepod, Sarcotretes scopeli, on the lantern fish, Benthosema glaciale, in the North Atlantic. The incidence of the hydroid on S. lumpi on redfish may possibly help in distinguishing Sebastes species in the northwest Atlantic.

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