New PDF release: Fish Diseases and Disorders: Volume 1: Protozoan and

By P. T. K. Woo

ISBN-10: 0851990150

ISBN-13: 9780851990156

ISBN-10: 184593217X

ISBN-13: 9781845932176

Fish is the imperative resource of protein for individuals in lots of components of the realm, fairly in constructing international locations. whereas so much fish are stuck from nature, aquaculture or fish farming is now creating a major contribution to overall fish construction. extra in depth stipulations of aquaculture usually bring about the next prevalence of fish ailments and issues. As within the first variation, the point of interest of this moment variation is on protozoan and metazoan parasites that reason ailment in fish. major adjustments to this moment version contain the addition of three new chapters and four of the unique chapters have new authors.

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Additional info for Fish Diseases and Disorders: Volume 1: Protozoan and Metazoan Infections

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W. Litaker, unpublished data), making the usefulness of this feature uncertain. e. not having plates or ‘armour’), making them of the gymnodinoid type. However, improved ultrastructural techniques led to the discovery that dinospores collected from redfish (Sciaenops ocellatus) and presumably originating from the Gulf of Mexico, Florida, USA, and parasites collected from an aquarium in Florida having an amyloodiniosis outbreak both had the same type of delicate plates. , 1994). Recent molecular analysis of the small subunit ribosomal RNA (SSU-rRNA) gene of A.

Fig. 1. Life cycle of oodinid parasites of fish (from Noga, 1987; courtesy of Science). (A) Parasitic trophont that feeds on the skin and gill epithelium. (B) Encysted tomont stage that divides to produce free-swimming infective dinospores (C). J. G. Levy Oodinids Amyloodinium, Piscinoodinium and Crepidoodinium have the same life cycle (Fig. 1). 3). Trophonts are bounded by a cell wall with a thin, resistant, pellicular envelope. Beneath the cell membrane is a layer of flat amphiesmal vesicles, as is found in free-living dinoflagellates (Dodge and Crawford, 1970).

Since observations of all putative developmental stages were observed in non-axenic cultures, and most of the stage transformations were not observed or documented, the possibility that some of the reported life cycle stages might be unrelated contaminants must be eliminated. For example, based upon observations of nonaxenic cultures, it was initially proposed that the dinoflagellate P. piscicida had over 24 stages, incuding multiple amoeboid forms, in its life cycle (Burkholder and Glasgow, 1997).

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Fish Diseases and Disorders: Volume 1: Protozoan and Metazoan Infections by P. T. K. Woo


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