Comparison of Manual Stripping and Pen Spawning for Production of Channel Catfish × Blue Catfish Hybrids and Aquarium Spawning of Channel Catfish

Abstract We compare manual stripping to pen spawning for production of hybrids of female channel catfish Ictalurus punctatus × male blue catfish I. furcatus, as well as to aquarium spawning of channel catfish. The ovulation rate for manually stripped females (91%) was not significantly different from that of females spawned in aquaria with channel catfish males (67%; P > 0.05); however, ovulation rate of manually stripped females during week 10 (80%) was superior to that of females spawned in pens (15%; P < 0.05) with blue catfish males. Female channel catfish spawned in aquaria with male channel catfish produced more (P < 0.05) eggs per kilogram body weight (6,607) than manually stripped females (4,587). Pen spawning of female channel catfish and male blue catfish also produced significantly more (P < 0.05) eggs per kilogram (7,950) than hand-stripping females (3,448) during week 10. Hatching rate (21%) and fry per kilogram (1,065) of female body weight were higher (P < 0.05) for channel catfish spawned ...

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