Factors Affecting Survival of Channel Catfish after Surgical Removal of Testes

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Abstract
Testes from adult male channel catfish (Ictalurus punctatus; N= 73) and blue catfish (I. furcatus; N= 16) were surgically removed, and the incisions closed. Variables evaluated for their effect on survival of fish were method of anesthesia (tricaine [MS–222] at 12 and at 23°C, and metomidate at 23°C), suturing procedure (suture, adhesive, and adhesive plus suture), and treatment with antibiotic (erythromycin) or without antibiotic. Postsurgery survival was determined 8–10 weeks later. Observed survival was 61 and 53% among fish treated with MS-222 at 12 and 23°C, respectively. The lower temperature decreased bleeding and increased the efficacy of MS-222. Metomidate-treated fish had significantly higher (P < 0.05) survival (74%) than MS-222-treated fish. Fewer of the metomidate-treated fish had incisions reopen because their swimming behavior in the recovery tank was more normal than that of MS-222-treated fish. Closure of incisions with adhesive alone resulted in 100% mortality. No difference (P ...

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