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The Reproductive Biology of the Silverjaw Minnow, Ericymba buccata Cope, in Kentucky
Author(s) -
Hoyt Robert D.
Publication year - 1971
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1971)100<510:trbots>2.0.co;2
Subject(s) - minnow , biology , fish <actinopterygii> , zoology , positive correlation , negative correlation , reproduction , fishery , ecology , medicine
Abstract The spawning period of the silverjaw minnow of Plum Creek in Shelby, Bullitt, and Spencer counties, Kentucky, extended from March through June, with the greatest spawning activity in April. Females of Age Group I had fewer primary ova with greater diameters than females of Age Groups II and III, which had successively more ova of smaller diameter. There was no correlation between diameter of ova and total length of female silverjaw minnows, but a high coefficient of correlation existed between number of ova and total length. The average number of mature ova was 748 and the average diameter was 0.75 mm. Spawning activity of fish in Pope Lick Creek, Jefferson County, Kentucky, in 1966, corresponded closely to that of fish in Plum Creek in 1968. Females of Age Group II formed the most important breeding class in Plum Creek, while females of Age Group I were most important in Pope Lick Creek. Numbers of males and females taken from Plum Creek were comparable.