Induced Ovulation and Spawning in the Catfish,Clarias isheriensis,Using Pituitary Extracts from Non-piscine Sources |
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| Abstract: | Acetone-dried pituitary extracts obtained from non-piscine sources- the common toad, Bufo regularis; the African bullfrog, Rana adspersa; and chicken, Gallus domesticus, were evaluated as alternative inducement agents to piscine-sourced pituitary extracts to spawn Clarias isheriensis. A single dose of 4 mg of dry pituitary extract per kilogram of female was injected intraperitoneally, and it induced ovulation and spawning in all treatments; there was no significant difference (P > 0.05) in percent fertilization of eggs. All pituitary extracts were effective in inducing ovulation and spawning in C. isheriensis and, therefore, can be used as alternative sources of pituitary hormones. |
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| Keywords: | Levamisole aflatoxin B1 disease resistance non-specific immunity rohu Labeo rohita |
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