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

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. stay 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 top 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, okay. Hamre and H. Ottera -- nine. On-Growing to marketplace 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 simple financial elements / R. Engelsen ... [et al.]

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The information that follows provides a broad overview of the types of bloom that can form. Several different groups of algae have species that may form blooms. In marine waters, the most important groups are the dinoflagellates (Dinophyta), diatoms (Bacillariophyceae) and members of the Haptophyta. Species of Cyanobacteria (blue–green algae) that form blooms are uncommon in marine waters and rarely lead to fish kills, although some freshwater species are a significant source of the toxins that can kill fish.

Some non-toxic diatoms can cause one of the more significant problems affecting cagecultured fish in cold temperate coastal water. High concentrations cause physical damage that contributes to fish mortalities. The silicaceous theca of species such as Skeletonema costatum and Chaetoceros convolutus have setae with small spines that can seriously damage the lamellae of fish gills. At concentrations of more than 5 cells ml-1 this causes mucus buildup and impaired gas exchange, that has resulted in mortalities of Pacific salmon in cagefarm sites.

The immune system of fish shows clear similarities to that of mammals, and several reviews have covered various aspects of this subject (cf. Vadstein, 1997). The immune system comprises both non-specific and specific components, and involves both cellular and humoral factors (Fig. 4). This division into four constituents is somewhat misleading because all components are interwoven and mutually dependent. The non-specific defence mechanisms are part of all normal fish, and do not require prior contact with an antigen/pathogen to elucidate a response.

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