<b>Vitamin C supplementation on growth performance and gonadal development in Nile tilapia

Abstract

ABSTRACT. The study aimed to verify the vitamin C supplementation on performance and gonadal development of Nile tilapia. 160 fingerlings distributed in 16 tanks with 65 L capacity and constant water renewal in a closed recirculation system were used. The design was completely randomized with four treatments (0, 150, 300, and 600 mg of monophosphate L-ascorbic acid kg -1 diet) and four replications. We evaluated the weight gain parameters, apparent feed conversion, apparent feed intake and carcass yield to evaluate of production performance. We analyzed the sexual maturation stage and gonadosomatic index (GSI) to evaluate reproductive performance. There was no statistical difference in the performance parameters. It was observed significant difference to the GSI. No significance was found regarding other reproduction parameters. We recommend the use of 150 mg kg Suplementação de vitamina C sobre o desempenho e desenvolvimento gonadal de tilápia-do-Nilo RESUMO. O estudo objetivou verificar a suplementação de vitamina C sobre o desempenho produtivo e desenvolvimento gonadal da tilápia-do-Nilo. Foram utilizados 160 alevinos, distribuídos em 16 aquários com capacidade de 65 L e renovação de água constante em sistema fechado de recirculação. O delineamento foi inteiramente casualizado com quatro tratamentos (0, 150, 300, e 600 mg de monofosfato de ácido L-ascórbico kg -1 de ração ) e quatro repetições. Foram avaliados os parâmetros de ganho em peso, conversão alimentar aparente, consumo aparente de ração e rendimento de carcaça para avaliação de desempenho produtivo. Foram analisados o estádio de maturação sexual e índice gonadossomático (IGS) para avaliação de desempenho reprodutivo. Não houve diferença estatística para os parâmetros de desempenho. Foi observado diferença significativa para o índice gonadossomático. Não foi observada significância em relação a outros parâmetros reprodutivos. Recomenda se a utilização de 150 mg kg -1 de Vitamina C à ração de tilápia-do-Nilo para o índice reprodutivo.Palavras-chave: ácido ascórbico, Oreochromis niloticus, reprodução.

Effect of Methods of Adding Vitamin C on Growth Performance and Feed Utilization and Survival of Fingerlings of Nile Tilapia Reared in Happa

“…There was a significant difference (P<0.05) in carcass yield (CY) among experimental groups. In agreement with Martins et al (2016). The 60 mg ascorbic acid kg-1 diet found as requirement level for maximum growth agrees with Li and Lovell (1985) who demonstrated that fish rose from 3 to 19g required 60 mg ascorbic acid kg-1 diet for maximum weight gain.…”

“…There was a significant difference (P<0.05) between experimental groups (Table ) in GW. The highest GW was recorded in T5, T4, and T3 and the lowest value of GW in T1, In agreement with Martins et al (2016).…”

Vitamin C dietary supplementation influence tadpoles of bullfrog Lithobates catesbeianus reared in low water temperature

“…Each aquarium was considered an experimental unit, totaling 12 experimental units. The experiment was carried out according to Martins et al (2016).…”

“…The research was carried out according to Martins et al (2016) number ethics committee for animal use 43079/2012.…”

The Gonad Maturity of Female Osteochillus vittatus in the presence of Ascorbic Acid

“…Other vitamins, like vitamin C, E an Zn mineral on the Nile tilapia (O. niloticus) ration might improve spawning frequency, larvae productions, fecundity, hatching rate, sperm motility and viability ( Gamanpilla et al, 2007). During the study of reproductive performance, vitamin C (AA) supplemetned at a dosage of 150 mg kg-1 on the O.niloticus fed ration incrase the Gonado Somato Indeks (GSI) (Martins et al, 2016). Gonad maturity is related to egg development.…”