Reproductive Efficiency in the Reciprocal Pairings Between Two Strains of Channel Catfish
- 1 April 1984
- journal article
- research article
- Published by Oxford University Press (OUP) in The Progressive Fish-Culturist
- Vol. 46 (2) , 106-110
- https://doi.org/10.1577/1548-8640(1984)46<106:reitrp>2.0.co;2
Abstract
Seed production must be efficient for the particular crossbreed in a fish breeding program. In this experiment pairings of channel catfish (female x male), Marion x Marion, Kansas x Kansas, Marion x Kansas, and Kansas x Marion were evaluated in pens for spawning day, spawning percentage, fecundity, hatchability, fry survival, and total fingerling output. More four-year-old brood stock spawned than three-year-olds. Marion x Marion and Marion x Kansas pairings resulted in spawns earlier than Kansas x Kansas and Kansas x Marion pairings. Strain of the female was important in determining spawning date and may impede crossbreeding success. Spawning percentage in the pure-strain pairings (52%) was higher than in crossbred pairings (32%). No differences were found in fecundity and hatchability. Total fingerling output was higher from pure-strain pairings (1,630 fingerlings/kg female) than from crossbred pairings (1,210 fingerlings/kg female). When the fish were six years old the reciprocal Marion x Kans...This publication has 0 references indexed in Scilit: