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Fin degeneration of young-of-the-year Alosa pseudoharengus (Clupeidae) in southern Lake Michigan

Copeia

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Abstract

Young-of-the-year alewives, Alosa pseudoharengus, with extremely shortened caudal fins were observed at four locations in southern Lake Michigan between 1964 and 1968. Some of the fins appeared stunted or underdeveloped, but microscopic examination revealed a deterioration of the fins and not an ontogenetic abnormality. Deterioration of the caudal fin was frequently accompanied by degeneration of the dorsal and anal fins. Degenerate fins were not found on other species nor on older alewives, with the exception of one known yearling alewife at Waukegan and possibly a few of the larger fish at Milwaukee.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Fin degeneration of young-of-the-year Alosa pseudoharengus (Clupeidae) in southern Lake Michigan
Series title:
Copeia
Volume
1970
Issue:
4
Year Published:
1970
Language:
English
Description:
p. 766-769
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Copeia
First page:
766
Last page:
769