A histopathologic evaluation of gross lesions excised from commercially important North Altantic marine fishes

Murchelano, Robert A. and Despres-Patanjo, Linda and Ziskowski, John (1986) A histopathologic evaluation of gross lesions excised from commercially important North Altantic marine fishes. NOAA/National Marine Fisheries Service, (NOAA Technical Report NMFS, 37)

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Abstract

Histopathologic studies of lesions found in commercially important North Atlantic marine fishes are uncommon. As part of a comprehensive Northeast Fisheries Center program ("Ocean Pulse") to evaluate environmental and resource health on the U.S. Continental Shelf from Cape Hatteras to Nova Scotia, grossly visible lesions of the gills, integument, muscle, and viscera of primarily bottom-dwelling fishes were excised and examined using light microscopy. Several gadid and pleuronectid fishes accounted for most of the lesions observed. Most pathological examinations were incidental to samples taken for age and growth determination and evaluation of predator/prey relationships. Several gadids, with either gill, heart, or spleen lesions, were sampled more intensively. Gill lesions principally affected gadids and were caused by either microsporidans or an unidentified oocyte-like cell. The majority of gastrointestinal lesions consisted of encapsulated or encysted larval worms or microsporidan-induced cysts. Few heart lesions were found. Integumental lesioos included ulcers, lymphocystis, and trematode metacercariae. Liver lesions almost always consisted of encapsulated or encysted larval helminths. Necrotic granulomata were seen in muscle and microsporidan-induced granulomata in spleen. Although not numerous, histologically interesting lesions were noted in integument, heart, liver, spleen, and muscle of several fish species. Histologic study of tissues excised from a variety of demersal and pelagic fishes from the eastern North Atlantic (France, Germany, Spain) revealed assorted integumental, renal, hepatic, and splenic lesions. Small sample size and non-random sampling precluded obtaining a meaningful quantitative estimate of the prevalence of the observed lesions in the population at risk; however, a useful census has been made of the types of lesions present in commercially important marine fishes. (PDF file contains 20 pages.)

Item Type: Monograph or Serial Issue
Title: A histopathologic evaluation of gross lesions excised from commercially important North Altantic marine fishes
Personal Creator/Author:
CreatorsEmail
Murchelano, Robert A.
Despres-Patanjo, Linda
Ziskowski, John
Series Name: NOAA Technical Report NMFS
Number: 37
Date: 1986
Publisher: NOAA/National Marine Fisheries Service
Issuing Agency: United States National Marine Fisheries Service
Subjects: Ecology
Fisheries
Biology
Item ID: 2785
Depositing User: Patti M. Marraro
Date Deposited: 10 Nov 2009 12:28
Last Modified: 29 Sep 2011 18:28
URI: http://aquaticcommons.org/id/eprint/2785

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