Effect of dietary astaxanthin and vitamin A on the reproductive performance of Penaeus monodon broodstock
Reproductive performance of pond-reared tiger shrimp given astaxanthin (100 mg/kg diet) and Vitamin A (20,000 IU) for 61 days was assessed in a 2x2 factorial experiment in a completely randomized design. Mean gonad index (the degree of gonadal development) of shrimp fed diets containing astaxanthin and/or vitamin A (3.08-3.30) was significantly high (P< 0.01) compared with that of the control (2.36). However, shrimp fed astaxanthin supplement had a significantly higher (P < 0.01) mean gonad index than those fed diet with vitamin A. Interconversion of both supplements was highly detectable during gonadal development of shrimp. Fecundity (3.2 - 7.3 x 10 eggs/female) and hatching rate of eggs (0.0 - 5.7%) were not significantly affected (P > 0.05) by the addition of astaxanthin and/or vitamin A in the diet. The results suggest that astaxanthin and vitamin A supplementation significantly improve gonadal development and spawning but not fecundity and hatching rate. Astaxanthin and vitamin A interconversion occurs more towards the astaxanthin pathway. Hormonal changes during eyestalk ablation could have influenced this interconversion. Further, astaxanthin is directly involved in the gonadal development of pond-reared shrimp broodstock. High maturation rate (60%), spawning rate (36%) and early occurrence of first spawning (14 days after eyestalk ablation) were observed in shrimp fed astaxanthin supplement.
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Piedad-Pascual, Felicitas (Philippine Council for Aquatic and Marine Research and Development, 1989)This paper echoes what transpired during the first International Conference of Penaeid Prawns/Shrimps held in Iloilo City in December 4-7, 1984, particularly on the Nutrition nd Feed Development. Around 25 papers were ...
Piedad-Pascual, F. (Institut Francais de Recherche pour l'Exploitation de la Mer, 1990)Marine shrimps absorb minerals from their aquatic environment aside from the minerals that come from the food they eat. Thus, the dietary requirement of shrimps for certain minerals will depend on the amounts and availability ...Series: Actes de Colloque 9