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By Erlend Moksness; E Kjørsvik; Yngvar Olsen

ISBN-10: 1405128631

ISBN-13: 9781405128636

Content material: 1. creation / The Editors -- 2. Abiotic components / B.R. Howell and S.M. Baynes -- three. Microbial Interactions, Prophylaxis and ailments / O. Vadstein, T.A. Mo and O. Bergh -- four. dwell foodstuff know-how of Cold-Water Marine Fish Larvae / Y. Olsen -- five. Brood inventory and Egg construction / D. Pavlov ... [et al.] -- 6. From Fertilisation to the tip of Metamorphosis : practical improvement / E. Kjorsvik, okay. Pittman and D. Pavlov -- 7. First Feeding expertise / Y. Olsen, T. van der Meeren and K.I. Reitan -- eight. Weaning and Nursery / J. Stoss, ok. Hamre and H. Ottera -- nine. On-Growing to industry dimension / M. Jobling -- 10. The prestige and views for the Species / T. Svasand ... [et al.] -- eleven. Marine inventory Enhancement and Sea-Ranching / T. Svasand and E. Moksness -- 12. New Species in Aquaculture : a few easy monetary facets / R. Engelsen ... [et al.]

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Of prime importance is temperature, since this is the physical attribute of the water that will have the greatest controlling influence on growth rate. Seasonal changes in temperature may be important in planning production strategies, since it would be desirable, for example, for peak temperatures to coincide with high stock holdings to obtain the greatest weight gain from the most favourable conditions. The avoidance of temperature extremes will also be important, during both the summer and the winter months, to avoid prolonged periods of low growth and low food conversion efficiencies, and even mortalities under the most severe conditions.

Specialised chloride cells in the gills remove ions such as sodium and chloride, while the kidneys produce small volumes of very concentrated urine. u. are subject to the opposite fluxes: salts leave the body and water enters by osmosis. Fish that tolerate both environments are able to do so because chloride cells can take up monovalent ions to replace those lost, and the kidneys produce copious amounts of dilute urine to counteract the osmotic flux. Unless the surrounding water is isotonic with the body fluids, energy is constantly used to maintain the body fluids’ composition.

Atlantic halibut yolk-sac larvae held at 10 lux show significantly better growth and survival than those kept at 1000 lux, probably because their activity is greater at the higher light intensity, resulting in less of the yolk reserves being available for growth. Yolk-sac cod larvae develop faster in constant darkness than larvae kept under a diel light cycle, since swimming activity is 6–10 times less in darkness. Once exogenous feeding begins, a suitable light level is necessary for active feeding to be successful.

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Culture of cold-water marine fish by Erlend Moksness; E Kjørsvik; Yngvar Olsen

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