Effects of dietary vitamin C on growth, gonad development and antioxidant ability of on‐growing gibel carp (Carassius auratus gibelio var. CAS III). (12th December 2017)

• Record Type: Journal Article
• Authors: Shao, Liye; Han, Dong; Yang, Yunxia; Jin, Junyan; Liu, Haokun; Zhu, Xiaoming; Xie, Shouqi
• Is Part Of: Aquaculture research. Volume 49:Number 3(2018)
• Page Start: 1242
• Page End: 1249
• Publication Date: 2017-12-12
• Subjects: antioxidant -- Carassius auratus gibelio -- on‐growing -- ovarian stages -- vitamin C; Aquaculture -- Periodicals; Fishery management -- Periodicals; 639.8
• DOI: 10.1111/are.13578
• Languages: English
• ISSNs: 1355-557X

Abstract

Abstract: An 88‐day experiment was conducted in a flowing system to evaluate the effects of dietary vitamin C on growth, body composition, antioxidant and gonad development of on‐growing gibel carp. Triplicate tanks of gibel carp (77.2 ± 0.1 g) were randomly fed with one of seven experimental diets containingl ‐ascorbic acid of 0, 101.1, 188.5, 313.1, 444.1, 582.1 and 747.0 mg/kg, respectively. The results showed that specific growth rate (SGR) and feed efficiency (FE) of fish were not affected by dietaryl ‐ascorbic acid. Dietaryl ‐ascorbic acid of 444.1 mg/kg diet led to low levels ( p < .05) of gonadosomatic index (GSI) and hypothalamic gonadotropin‐releasing hormone (GnRH) in on‐growing fish, as well as the early ovarian stages (Developing stages) compared with fish (Maturing stages) from the other groups. Dietaryl ‐ascorbic acid supplementation increased ( p < .05) the dorsal muscle collagen content, but did not affect the protein or lipid content of dorsal muscle in gibel carp. Plasma total antioxidant capacity (T‐AOC) and superoxide dismutase (SOD) activity increased ( p < .05) and then remained unchanged with the increase in dietaryl ‐ascorbic acid levels. Dietaryl ‐ascorbic acid of 101.1 mg/kg diet improved ( p < .05) plasma lysozyme activity of the fish. Broken‐line regression indicated that dietaryl ‐ascorbic acid requirement of 77 g gibel carp was 223.3 or 225.0 mg/kg diet based on plasma T‐AOC or SOD activity, which was a little higher than that based on plasmal ‐ascorbic acid concentration (193.2 mg/kg).