Influence of antioxidants on the growth performance, gonadosomatic index and biochemical properties of gonad and fertilization success in koi carp (Cyprinus carpioL.)

Abstract

Adult koi carp (Cyprinus carpio L.) were fed with feed supplemented with vitamin C at 200 mg/kg feed (T1), 400 mg/kg feed (T2) and 600 mg/kg feed (T3), and vitamin E at 200 mg/kg feed (T4), 400 mg/kg feed (T5) and 600 mg/kg feed (T6) at ad libitum for 60 days. Control (without vitamin inclusion) was also maintained. Observations were made on the growth performance, GSI and biochemical composition of gonads such as crude protein, crude fat, cholesterol and carotenoid once in 15 days. At the end of the experiment, fertilization was done to record the fertilization and hatching rate. The difference in the values was noticed among the male and female koi carp. Fish supplemented with vitamin E at 200 mg/kg feeexhibited higher growth in both male and female fish, and the fertilization rate and hatching rate were also higher in that group, and the values were significantly different (p < 0.05) and showed linear and quadratic trends. Inclusion of vitamin C at 600 mg/kg feed had shown higher lipid and carotenoid contents of female koi carp (p<0.05). Hence, the results revealed that supplementing vitamin C and E in the diet is necessary for the successful reproduction of koi carp.

Effects of vitamins C and E on semen quality and reproductive hormones in yellow mystus (Hemibagrus spilopterus)

“…Positive effects of Vit E on sperm motility have also been documented (Cosson, 2013;Fedorov et al, 2015). The combined supplementation of vitamins C and E may create synergistic effects, enhancing overall antioxidant defenses and fostering a favorable cellular environment for germ cell development (Andrade et al, 2007;Khara et al, 2016;Keogh et al, 2017;Betsy et al, 2021). While specific references are needed to substantiate these claims, research indicates the potential of these vitamins to positively impact germ cell quality and reproductive health in various species (Lee and Dabrowski, 2003;Ortuño et al, 2003;Chen et al, 2004;Gao et al, 2014).…”

Effects of Dietary Vitamin C on the Growth Performance, Antioxidant Activity and Disease Resistance of Fish: A Review

“…Norepinephrine exerts direct stimulatory effects on the release of hypothalamic gonadotropin-releasing hormone, a factor closely associated with the reproductive development of animals (Francis, 2012). Betsy et al (2021) observed an elevation in the gonadosomatic index (GSI) of Koi Carp (Cyprinus carpio L.) following the administration of feed enriched with 600 mg kg −1 of vitamin C. Martins et al (2016) reported a comparable promotional impact of VC in Nile Tilapia (Oreochromis niloticus).…”