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PENGARUH KADAR VITAMIN E DALAM PAKAN TERHADAP KUALITAS TELUR IKAN PATIN (Pangasius hypophthalmus) [Effect of dietary vitamin E on the egg quality of catfish (Pangasius hypophthalmus)]
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Abstract
This experiment was conducted to determine the effect of dietary vitamin E (VE) on the diet of catfish broodstock, Pangasius hypophthalmus on the egg quality. Four isonitrogenous (37.68-38.05% crude protein) and isocaloric (3066.66-3104.71 kcal digestible energy/kg of feed) practical diets contained either 28.08, 146.55, 189.65, or 251.80 mg VE/kg of feed, respectively, were applied the to catfish broodstock. The broodstock were cultivated in net cages held in earthen pond. Fishes were fed daily at 4% of body weight for 15 months using these diets. During feeding period, gonad maturation stage were examined, and egg ovulation was induced artificially. The vitamin E and the total lipid contents in the eggs produced were increase as the dosage of VE in the diet elevated. The vitamin E affected the gonad somatic index, fecundity, egg diameter, hatching rate, abnormal larvae, and total number of larvae produced. Fishes fed on diet containing 189.65 mg VE/kg of feed significantly produced the highest hatching rate (78.77%), total number of larva 332,339/kg of brood stock, and lowest abnormal larvae (0.19%). Supplementation 189.65 mg VE/kg of feed significantly improve the eggs quality of catfish.
Abstrak
Percobaan ini dilakukan untuk menentukan pengaruh dari vitamin E (VE) dalam pakan induk ikan patin, Pangasius hypophthalmus terhadap kualitas telurnya. Empat macam pakan yang digunakan yaitu yang mengandung protein relatif sama yaitu berkisar antara 37.68-38.05% dan kalorinya 3066.66-3104.71 kkal/kg pakan, kandungan VE yang digunakan dalam pakan secara berturut-turut antara lain 28.08, 146.55, 189.65, dan 251.80 mg VE/kg pakan. Induk dipelihara dalam jaring yang ditempatkan dalam kolam beton. Setiap liari ikan diberi makan sebanyak 4% dari berat tubuh untuk selama 15 bulan. Selama periode pemberian pakan, tingkat kematangan gonad diperiksa, dan pembuahan dilakukan secara buatan. Vitamin E dan kandungan lemak dalam telur yang dihasilkan meningkat sesuai dengan peningkatan dosis VE dalam pakan. Vitamin E mempengaruhi gonad somatik indek, fekunditas, diameter telur, laju penetasan, larva abnormal, dan jumlah total larva yang dihasilkan. Pakan yang mengandung 189.65 mg VE/kg pakan menghasilkan tingkat penetasan yang tinggi (78.77%), jumlah total larva 332,339 ekor/kg induk, dan larva abnormal terendah (0.19%). Penambahan 189.65 mg/kg pakan dapat meningkatkan kualitas telur ikan patin.
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