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ARS Home » Southeast Area » Stoneville, Mississippi » Warmwater Aquaculture Research Unit » Research » Publications at this Location » Publication #244941
Title: Toward Improving Lhrha Induced Spawning of Channel Catfish for Channel X Blue Hybrid Catfish Production

Author
item Chatakondi, Nagaraj
item Small, Brian
item GREEN, C - Louisiana State University
item Bosworth, Brian

Submitted to: Aquaculture America Conference
Publication Type: Abstract Only
Publication Acceptance Date: 11/23/2009
Publication Date: 3/10/2010
Citation: Chatakondi, N.G., Small, B.C., Green, C. ., Bosworth, B.G. 2010. Toward Improving Lhrha Induced Spawning of Channel Catfish for Channel X Blue Hybrid Catfish Production. Aquaculture America Conference. p. 184

Interpretive Summary:

Technical Abstract: The channel catfish (Ictalurus punctatus) x blue catfish (Ictalurus furcatus) F1 hybrid is an ideal candidate for pond culture with several desirable traits. Hybrid catfish production is a hormone-based synchronization protocol consisting of collecting eggs from strippable, induced, channel catfish females, fertilizing with blue catfish sperm, and incubating eggs to hatch fry. To further improve hybrid catfish production, hormonal manipulation needs to be used more effectively as a management tool to enhance the efficiency of gamete production. LHRHa (luteinizing hormone-releasing hormone analogue) is known to advance and synchronize ovulation in catfish; however, pertinent aspects for its effectiveness relating to dosage, mode and frequency of administration need to be thoroughly evaluated. A reliable and predictable means to induce spawning would be invaluable to the success of hybrid catfish culture. Three forms of LHRHa were evaluated (suspension, gel (carbopol) and implant (cholesterol and EVAc). The associated gonadosomatic index at the end latency is presented in Figure 1. Three LHRHa delivery forms (intraperitoneal, intramuscular and intracranial) were also evaluated. Females were given various doses of LHRHa via intracranial injections. Maturity at the end of latency is presented in Figure 2. Results of these efforts to develop efficacious methods for induced spawning of channel catfish for hybrid catfish production and the profiles of maturation indicators to predict ovulation will be discussed.