Journal Article10.1111/J.1365-2109.2010.02635.X
Effects of dissolved oxygen concentration and stocking density on the growth, energy budget and body composition of juvenile Japanese flounder, Paralichthys olivaceus (Temminck et Schlegel)
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TL;DR: Energetic analysis demonstrated that high DO concentrations could alleviate the growth depression caused by high stocking densities, decrease energy loss in respiration and nitrogen excretion and increase the energy proportion allocated to growth.
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Abstract: An energetic method was used to investigate the effects of stocking density and dissolved oxygen (DO) concentration on the growth of juvenile Paralichthys olivaceus. Fish, with initial weights of 14±2.1 g, were exposed to a normal and a high DO of 5.5±0.5 and 14±2 mg L−1, as well as four stocking densities per DO concentration (100, 200, 300 and 400 ind m−2 for the normal DO and 200, 400, 600 and 800 ind m−2 for the high DO). The feed efficiency (FEW) decreased significantly with increasing stocking density and increased significantly with increasing DO concentration. The maximum weight was achieved at 400 ind m−2 under a high DO depending on our rearing conditions. The stocking density and DO concentration change energy ingestion and its allocation for respiration, growth and excretion lost in nitrogen excretion, but do not affect the energy loss through faeces. The results of the body composition of fish indicated that the stocking density and DO concentration had no significant effects on the moisture, lipid content and gross energy, but are affected by the same. Energetic analysis demonstrated that high DO concentrations could alleviate the growth depression caused by high stocking densities, decrease energy loss in respiration and nitrogen excretion and increase the energy proportion allocated to growth.
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Citations
Effects of stocking density on productive performance, economic profit and muscle chemical composition of pacu ( Piaractus mesopotamicus H) cultured in floating cages
L. F. Montenegro,Sebastián Abel Cunzolo,César Preussler,Herman H. Hennig,Adriana Maria Descalzo,Carolina Daiana Pérez +5 more
TL;DR: In this article , a 360-day study aimed to evaluate the productive performance, economic profit and meat quality of pacu cultured in floating cages at different stocking densities, and the results showed that the LSD group had higher final biomass and weight gain than the HSD group.
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References
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TL;DR: Elliott et al. as mentioned in this paper examined energy losses in the faeces and excretory products of brown trout and developed equations to estimate these losses, and found that about 15% of the total energy intake of a fish is lost in faecal excreta and about 3% in the excretary products.
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Effects of water temperature and dissolved oxygen on daily feed consumption, feed utilization and growth of channel catfish (Ictalurus punctatus)
TL;DR: A multivariate regression model was fitted to the data to describe the combined effects of temperature and DO on FI and will assist in optimization of feeding practices in channel catfish aquaculture.
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Bioenergetics: feed intake and energy partitioning
Malcolm Jobling
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TL;DR: Several multi author books and reviews have appeared since the mid 1970s, and these give a good background into both the general principles of bioenergetics.
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Effects of stocking density on the performance of the Australian freshwater silver perch (Bidyanus bidyanus) in cages
TL;DR: Silver perch fingerlings were stocked at densities of 12, 25, 50, 100 or 200 fish/m3 in cages (1 m3) in an aerated, 0.32-ha earthen pond and fed a formulated diet containing 32% crude protein and 13 MJ/kg energy and cultured for 210 days.
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Effects of oxygen concentration and body weight on maximum feed intake, growth and hematological parameters of Nile tilapia, Oreochromis niloticus
TL;DR: Data suggest that the limitation of the gill surface area results in lower feed intake and growth of fish at low DO concentration than at high DO concentration and the allometric relationship between the gills surface area and body weightresults in lower relative feed intake, which in turn results inLower relative growth in big fish than in small fish.
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