The Effect of Luteinizing Hormone Releasing Hormone Analog Regime and Stage of Oocyte Maturity for Induced Ovulation of Channel Catfish, Ictalurus punctatus
Identifieur interne : 000632 ( Main/Merge ); précédent : 000631; suivant : 000633The Effect of Luteinizing Hormone Releasing Hormone Analog Regime and Stage of Oocyte Maturity for Induced Ovulation of Channel Catfish, Ictalurus punctatus
Auteurs : Nagaraj G. Chatakondi [États-Unis] ; D. Roger Yant [États-Unis] ; Anang Kristanto [Indonésie] ; Gloria M. Umali-Maceina [États-Unis] ; Rex A. Dunham [États-Unis]Source :
- Journal of the World Aquaculture Society [ 0893-8849 ] ; 2011-12.
Abstract
This study addresses rapid methods to identify mature channel catfish, Ictalurus punctatus, females for induced spawning with luteinizing hormone releasing hormone analog (LHRHa) and common carp pituitary extract (CPE) and the effects of stage of maturity, hormone dose, season, and cannulation before hormone injection. Hormonal intervention is the most effective method for inducing maturation and spawning in channel catfish × blue catfish, Ictalurus furcatus, hybrids. A total of 80 mature channel catfish were staged for maturity based on secondary sexual characteristics and 20–30 oocytes cannulated to ascertain their maturation stage based on the position of gonadal vesicle. Twenty females were randomly assigned to one of the four hormone regimes (priming + resolving dose): CPE 2 + 8 mg/kg (CPEC); LHRHa 20 + 40 µg/kg (LHRHaL); LHRHa 20 + 60 µg/kg (LHRHaM); and LHRHa 20 + 80 µg/kg (LHRHaH) and a fifth treatment consisted of 20 females selected based on apparent maturity as evidenced by external appearance were injected with CPE, 2 + 8 mg/kg without cannulation (CPEO). Two trials were conducted in early part of the spawning season and two trials in peak season. External methods to identify maturity correlated (r = 0.63) with that of “germinal vesicle position” method to identify the stage of maturity in females. Mean percent of females that ovulated, hatched, and fry produced per kg body weight did not differ (P > 0.05) among the five hormone treatments. The mean percent females that ovulated was higher (P < 0.05) for CPE‐induced females that were identified as “excellent” females based on external examination. The performance of cannulated females did not differ (P > 0.05) with that of non‐cannulated catfish. The mean egg quality of hormone‐induced females and percent of females ovulated in response to hormone treatment established a weak but significant linear relationship (Y = 3.85 + 0.008 × ovulation, r2 = 0.39, P < 0.05).
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DOI: 10.1111/j.1749-7345.2011.00535.x
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Umali-Maceina</name></author><author><name sortKey="Dunham, Rex A" sort="Dunham, Rex A" uniqKey="Dunham R" first="Rex A." last="Dunham">Rex A. 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Chatakondi</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Harvest Select Farms, P. O. Box 560, Inverness, Mississippi 38753</wicri:regionArea><wicri:noRegion>Mississippi 38753</wicri:noRegion></affiliation><affiliation></affiliation></author><author><name sortKey="Yant, D Roger" sort="Yant, D Roger" uniqKey="Yant D" first="D. Roger" last="Yant">D. Roger Yant</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Hybrid Catfish Company, 1833 Montgomery Drive, Inverness, Mississippi 38753</wicri:regionArea><wicri:noRegion>Mississippi 38753</wicri:noRegion></affiliation></author><author><name sortKey="Kristanto, Anang" sort="Kristanto, Anang" uniqKey="Kristanto A" first="Anang" last="Kristanto">Anang Kristanto</name><affiliation wicri:level="1"><country xml:lang="fr">Indonésie</country><wicri:regionArea>Department of Fisheries and Allied Aquacultures, Auburn University, Auburn, Alabama 36849, USA and Research Institute for Freshwater Aquaculture, Bogor, West Java</wicri:regionArea><wicri:noRegion>West Java</wicri:noRegion></affiliation></author><author><name sortKey="Umali Aceina, Gloria M" sort="Umali Aceina, Gloria M" uniqKey="Umali Aceina G" first="Gloria M." last="Umali-Maceina">Gloria M. 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Hormonal intervention is the most effective method for inducing maturation and spawning in channel catfish × blue catfish, Ictalurus furcatus, hybrids. A total of 80 mature channel catfish were staged for maturity based on secondary sexual characteristics and 20–30 oocytes cannulated to ascertain their maturation stage based on the position of gonadal vesicle. Twenty females were randomly assigned to one of the four hormone regimes (priming + resolving dose): CPE 2 + 8 mg/kg (CPEC); LHRHa 20 + 40 µg/kg (LHRHaL); LHRHa 20 + 60 µg/kg (LHRHaM); and LHRHa 20 + 80 µg/kg (LHRHaH) and a fifth treatment consisted of 20 females selected based on apparent maturity as evidenced by external appearance were injected with CPE, 2 + 8 mg/kg without cannulation (CPEO). Two trials were conducted in early part of the spawning season and two trials in peak season. External methods to identify maturity correlated (r = 0.63) with that of “germinal vesicle position” method to identify the stage of maturity in females. Mean percent of females that ovulated, hatched, and fry produced per kg body weight did not differ (P > 0.05) among the five hormone treatments. The mean percent females that ovulated was higher (P < 0.05) for CPE‐induced females that were identified as “excellent” females based on external examination. The performance of cannulated females did not differ (P > 0.05) with that of non‐cannulated catfish. The mean egg quality of hormone‐induced females and percent of females ovulated in response to hormone treatment established a weak but significant linear relationship (Y = 3.85 + 0.008 × ovulation, r2 = 0.39, P < 0.05).</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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