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

By Erlend Moksness; E Kjørsvik; Yngvar Olsen

Content material: 1. advent / The Editors -- 2. Abiotic components / B.R. Howell and S.M. Baynes -- three. Microbial Interactions, Prophylaxis and illnesses / O. Vadstein, T.A. Mo and O. Bergh -- four. dwell nutrients 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 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 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 uncomplicated monetary elements / R. Engelsen ... [et al.]

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1992). , 1992). e. within eggs. A fish pathogen that has been shown to occupy this ecological niche is Renibacterium salmoninarum, the causative agent of bacterial kidney disease (BKD) in salmonids. Interestingly, this is an obligate pathogen that seems highly specialised for the niches it occupies, which include growth within host macrophages. It is a very slow-growing bacterium, both in laboratory cultures and within the fish. The progress of the disease is slow, making it possible for the host to reproduce, thus spreading the genes of its parasite.

This is also true with respect to the immune system. However, the ontogenetic stage at which hatching takes place is highly variable between species. Halibut larvae hatch at a very primitive stage and the wolf-fishes are relatively advanced at hatching, whereas cod and turbot, for instance, may be viewed as intermediate cases with respect to developmental stage at hatching. It is believed that the larvae of most fish species do not have the ability to develop specific immunity during the early stages of development.

Much of the published work in this area is for salmonids, but the relatively small amount of information for cold-water marine fish supports these generalisations. 5 Salinity The salinity of seawater varies little offshore, and in general marine fish are adapted to live in this stable environment. There are a limited number of species that naturally occupy the more variable conditions found in estuaries, and their physiology is better suited to tolerate the daily changes associated with each tidal cycle.

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