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

By Erlend Moksness; E Kjørsvik; Yngvar Olsen

Content material: 1. creation / The Editors -- 2. Abiotic elements / B.R. Howell and S.M. Baynes -- three. Microbial Interactions, Prophylaxis and illnesses / O. Vadstein, T.A. Mo and O. Bergh -- four. reside meals know-how of Cold-Water Marine Fish Larvae / Y. Olsen -- five. Brood inventory and Egg creation / D. Pavlov ... [et al.] -- 6. From Fertilisation to the tip of Metamorphosis : sensible improvement / E. Kjorsvik, okay. Pittman and D. Pavlov -- 7. First Feeding know-how / Y. Olsen, T. van der Meeren and K.I. Reitan -- eight. Weaning and Nursery / J. Stoss, okay. Hamre and H. Ottera -- nine. On-Growing to marketplace measurement / 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 uncomplicated monetary points / R. Engelsen ... [et al.]

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The presence of high cell concentrations, usually dominated by one species, may cause the water to appear coloured, leading to so-called ‘red tides’, usually caused by species of dinoflagellate, or ‘brown tides’, which tend to be associated with diatom blooms. Such blooms are not always 22 Culture of cold-water marine fish toxic, and the name red tide is often used for any algal bloom, but the same names are often used to describe blooms which result in a build-up of toxins in the water. These toxins can cause fish kills, or become concentrated in fish and shellfish rendering them toxic to humans.

1994). 32 Culture of cold-water marine fish One of the main functions of fish skin is the separation of the internal tissues from the environment. The mucus secreted by cells in the skin contains immunoactive compounds. Specialised eucaryotic parasites, such as lice, may penetrate the skin, thus making it possible for bacterial pathogens to enter through the lesions. , 1994). It is likely that many parasites are important vectors transmitting pathogens, and that by causing damage to the fish skin they open the way for other pathogens.

Mutualism is most beneficial, and occurs when both symbionts benefit from the relationship. The most destructive is parasitism, in which one symbiont lives at the expense of, or harms, the host. Commensalism is the relationship in which one symbiont benefits while the other (the host) is neither helped or harmed. Redrawn from Prescott et al. (1999). , 1988). may play an important role in protection against pathogens. Bacteria and viruses are engulfed by endocytosis in the intestinal epithelium.

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