Diseases Of Marine Fish Research Articles

KÜLTÜRÜ YAPILAN DENİZEL TÜRLERİN PATOJENİ OLAN Vibrio harveyi ÜZERİNE BİR DERLEME

Bacteria of the genus Vibrio, which is included in the family Vibrionaceae are commonly found in coastal and estuarine waters. Many Vibrio species can cause diseases in marine fish, crustacean and bivalve species. Moreover, many of them can infect humans after a contact with these animals or consumption of these animals and cause zoonoses. Vibrio harveyi, which was first isolated as a causative agent of a disease problem in a shark species in 1982, was deter-mined to cause diseases and mass mortalities especially in marine invertebrates and in a variety of fish species including aquacultured species such as gilthead sea bream, sea bass and salmo-nid fishes. Deep skin lesions and ulcers, gastroenteric disorders and eye lesions were observed in fish infected with V. harveyi. Primer isolation of this organism can be made on general me-dia such as Tryptic Soy Agar (TSA; supplemented with 2% NaCl) and Thiosulphate-Citrate-Bile salts-Sucrose (TCBS) (semi selective medium for Vibrio species). Besides, Vibrio harveyi Agar (VHA), a media which is developed specially for this species can be used for isolation and species identification. Chloramphenicol, ciprofloxacin and oxytetracycline are recom-mended for the control of disease by various researchers. The aim of this review is to present data to the fish farmers and fish health specialists on the etiology, epizootiology, pathogenicity, clinical symptoms and the pathology, diagnosis, protection and control of Vibrio harveyi and some studies on V. harveyi which is a worldwide distributed bacterium and the causative agent of diseases and mass mortalities in marine animals.

Non-infectious gill disorders of marine salmonid fish

Gill disorders present a significant challenge in salmon (Salmo salar and Oncorhynchus sp.) farming regions throughout the world. This review of gill disorders and diseases of marine fish is focused on the non-infectious causes of gill disease in marine stage salmonids and these are grouped into harmful algae, such as Karenia mikimotoi, harmful zooplankton, such as Pelagia noctiluca, other environmental challenges, such as pollutants, as well as nutritional and genetic or congenital causes. The present level of understanding of these gill disorders is reviewed with regard to risk factors, potential impacting factors, methods of best practice to mitigate non-infectious gill disease and disorders, as well as knowledge gaps and avenues for future research.

Principal Diseases of Marine Fish and Shellfish. Volume 1. Diseases of Marine Fish

Principal Diseases of Marine Fish and Shellfish. Volume 1. Diseases of Marine Fish

An Infestation of Adult Lernaeocera [Copepoda] on Wild Sole, Solea Solea, Kept under Hatchery Conditions

Fish are perhaps one of the most highly parasitized of animal groups, and the unnatural crowding which occurs in hatcheries and aquaria favours the greatly increased possibility of heavy infestation by some parasites. Such hazards have been recognised in freshwater fishes for some time (see, for example, Dogiel, Petrushevski & Polyanski, 1961), and diseases of marine fishes are now beginning to receive increasing attention (Sindermann, 1966).

Der gegenwärtige Stand der Züchtungsforschung an Meeresfischen in Japan

1. The present status of marine fish cultivation research in Japan is reviewed. 2. In marine fish farms, the stocks have been recruited from young fish caught at sea, but recently, artificially reared fry are more and more taking the place of natural young fish, in some species. 3. The main fish species cultivated in Japanese farms are yellow-tailSeriola quinqueradiata, pufferFugu rubripes rubripes and red sea breamPagrus major; they are mostly cultivated in floating net cages set in sheltered places. 4. To increase the natural resources, the release of artificially reared young of some fishes has just started in the Inland Sea of Japan. 5. Efforts are being made to obtain ripe eggs from reared marine fishes, to hatch fertilized eggs and to raise fry: Spawning, fertilization, hatching and raising to commercial size has been achieved in several important shallow water marine fishes. 6. To keep the ambient water suitable for hatching and raising of fishes, filtration, circulation, exchange of sea water and availability ofChlamydomonas sp. andChlorella sp. (to remove metabolic wastes of the fish and to supply oxygen) have been studied. 7. Research on food sources suitable for respective stages of fishes and on the methods of producing such foods have been made. Several marine organisms are cultivated in abundance as food sources for fishes. 8. Diseases of marine fishes have been studied to keep them healthy and to enhance survival rates. 9. Some experiments on the production of hybrids between different marine fish species are now in progress; several hybrids have already been produced artificially and reared successfully.

Studies on the ettects of furpyridinol (P-7138) against ulcerative diseases in marine fish

Studies on the ettects of furpyridinol (P-7138) against ulcerative diseases in marine fish