Turkish Journal of Fisheries and Aquatic Sciences
2020, Vol 20, Num, 2 (Pages: 97-102)
Intensive Winter Culture of Chondrostoma nasus (Linnaeus, 1758) and Vimba vimba (Linnaeus, 1758) for Spring Restocking
Pavel Lepič 1 ,Miroslav Blecha 1 ,Pavel Kozák 1
1 South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, Faculty of Fisheries and Protection of Waters, Vodnany, Czech Republic
DOI :
10.4194/1303-2712-v20_02_02
Viewed :
6042
-
Downloaded :
4455
The aim of this study was to compare the grow performance of two rheofilic fish
species at different water temperatures (WT) under recirculation aquaculture system
(RAS) conditions. Two six-month experiments were conducted during two consecutive
winter seasons with the five-month-old nase Chondrostoma nasus (Linnaeus, 1758)
and vimba bream Vimba vimba (Linnaeus, 1758) which had been trained on pellet feed
and acclimated to four different temperatures. The three experimental groups were
reared in closed separate RAS systems with the WT about 15°C, 18°C and 21°C
respectively together with a fourth controlled group which were kept in a flow through
system simulating ambient outside conditions at an average of approximately 4°C. All
monitored parameters, total length (TL), (BW) body weight, specific growth rate (SGR)
and food conversion ratio (FCR) were significantly greater with increasing of
temperature in all groups for both fish. The nase total length gained 73.37±3.82,
94.11±5.58, 108.68±7.07 and 128.52±7.64 mm and body weight 2.85±0.47, 6.14±1.20,
9.26±2.14 and 16.71±3.46 g in 4, 15, 18 and 21°C, respectively. The same pattern was
observed in vimba bream (TL 58.32±2.71, 69.33±6.68, 91.28±7.48 and 102.16±7.80
mm and BW 1.57±0.24, 2.71±0.50, 6.81±1.96 and 8.88±2.52 g).
Keywords :
Vimba bream, Nase, Temperature, SGRw, FCR, RAS, Restocking