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- W2393414872 abstract "This paper investigated the etlects of photoperiod and light intensity, water current and stocking density on feeding, behavior and growth in juveniles Amur sturgeon, Acipenser schrenckii. Sturgeon in each experimental treatment grew in allometry. There were no significant differences between the initial and final SV of the treatments. The growth performances were significantly affected by water current and stocking density. Lower density and higher water velocity had positive influences on growth performances. The growth efficiency (GE), specific growth rate (SGR) and daily weight gain (DWG) significantly increased with the decrease of stocking density, and with the increase of water velocity. But condition factor decreased with the increase of density, whereas net yield (NY) was increasing with the increase the stocking densities. There was a significant inverse linear relation between stocking density (SD) and special growth rate (SGR) [SGR=4.9728-0.4914×SD(r=-0.6553)]. And there was a significant positive linear relation between growth efficiency (GE) and water velocity (V) [GE=46.106+142.04V(r=0.5216)]. However, photoperiod didn't show significant effect on growth performances within the experimental illumination. Juveniles' body blanched in all dark condition, while the body color in both all light and natural photoperiod was the same as natural. These environmental factors didn't cause sturgeon's appetite depression. The feeding rate remained at the level of 5% body weight. But water current and Stocking density had significant impacts on feed conversion ratio (FCR). This study demonstrated that there was no significant difference in illumination perference of juvenile Amur sturgeon when illumination ranged from 100 lx to 1 100 lx. However, juveniles were strongly photonegative when illumination was over 13 000 lx. Moreover, there are some relationships between water current and swimming behavior of juveniles. Under the moving water environment, fish usually, congregate and swim in positive rheotaxis." @default.
- W2393414872 created "2016-06-24" @default.
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- W2393414872 date "2004-01-01" @default.
- W2393414872 modified "2023-09-26" @default.
- W2393414872 title "The influences of illumination, water current and stocking density on feeding, behavior and growth in juveniles Acipenser schrenckii" @default.
- W2393414872 hasPublicationYear "2004" @default.
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