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Submitted to: American Fisheries Society Annual Meeting
Publication Type: Abstract Only Publication Acceptance Date: 2/10/2015 Publication Date: 2/23/2015 Citation: Chatakondi, N.G. 2015. Effects of egg quality and method of incubation on the hatching success of channel X blue hybrid catfish eggs. American Fisheries Society Annual Meeting. P. 14. Interpretive Summary: Technical Abstract: The objective of this study was to evaluate the effects of egg quality of stripped eggs from channel catfish (Ictalurus punctatus) and method of incubation of fertilized hybrid catfish eggs on hatching success. Stripped eggs from 17 channel catfish females were evaluated in a 2 x 2 factorial study to evaluate the effects of either low quality (pH < 7.5) or high quality (pH > 7.5) stripped channel catfish eggs fertilized with pooled blue catfish (I.furcatus) sperm and incubated either in hatching troughs or McDonald jars. Pcent fertilization and neuralation of stripped eggs did not differ in this study. The hatching success of high quality eggs incubated in troughs (60.0%) did not differ (P>0.05) with the eggs incubated in jars (61.9%). Average hatching success of hybrid catfish eggs from high quality (60.9%) eggs was higher than low quality (41.4%) eggs. The hatching success of low quality eggs in hatching troughs (46.7%) was higher (P<0.05) than jars (36.1%). Method of incubation does not affect the hatching success of high quality eggs. Incubating low quality eggs in hatching troughs facilitates the chemical treatment to reduce hatching losses associated with bacterial and fungal infections during incubation. Incubating fertilized eggs in hatching jars need limited labor and care to expand the hatching capacity. The findings of the study suggest the production of high quality eggs to maximize the production of hybrid catfish embryos in catfish hatcheries regardless of the incubation method. |
