Simultaneous trawling at surface and at depth at one location off the Columbia River, Oregon, in June 2000 identified the depth distribution of juvenile salmonids and associated fishes. Juvenile salmon off the Columbia River were distributed primarily near the surface, within the upper 12 m. Highest densities of subyearling chinook salmon (Oncorhynchus tshawytscha) off the Columbia River were a...

Brown bullheads Amieurus nebulosus (family Ictaluridae) are commonly used as a sentinel of environmental contamination. These fish are not generally cultured under laboratory conditions and little is known about their disease susceptibility. Here we report an outbreak of disease due to Edwardsiella ictaluri in a laboratory population of tank-reared, wild-caught brown bullheads. The isolate was ...

This study describes the current status of the small fish community in Niushan Lake in China, and examines the spatial and seasonal variations of the community in relation to key environmental factors. Based on macrophyte cover conditions, the lake was divided into three major habitat types: (1) Potamogeton maackianus habitat, (2) Potamogeton maackianus and Myriophyllum spicatum habitat, and (3...

In the present study, the bioaccumulation of heavy metals (Cr, Cu, Cd, Pb) content were determined in freshwater edible fishes Cyprinus carpio Linnaeus and Pelteobagrus fluvidraco, which were caught from the Meiliang Bay, Taihu Lake, a large, shallow and eutrophic lake of China. The results showed that the Cr, Cu, Cd and Pb content in the edible parts of the two fish species were much lower tha...

The objective of the present study is to determine the accumulation of heavy metals in five of the most commercially important fishes caught in the Parangipettai coastal waters and analyzed for the (Fe, Mn, Mg, Ni) concentrations in the muscles. The results revealed that the Mn and Fe concentrations were the highest; followed by Mg and Ni being the lowest in the all five species of fish tissue....

The present study was carried out from December 2007, during which to November 2008 more than 210 fish (Barbus barbulus) were caught and measured, including, 57 males, 64 females 89 immature fishes. Maximum minimum total lengths 885 mm respectively. weight 8460 g 99 length-weight relationship Y=0.00002 L2.90 (n=57, R2=0.85) for Y=0.000002 L3.22 (n=64, R2=0.87) Y=0.00005 L2.96 (n=210, R2 =0.90) ...

In the present study digenean parasite faunas of four labrid fishes, Symphodus tinca, S. rossali, cinereus and ocellatus were investigated compared. A total 52 fish specimens caught on Black Sea coast near Sinop, Turkey, over two years. Eight species found in fishes. These are Helicometra fasciata, Gaevskajatrema perezi, Proctoeces maculatus, Phyllodistomum crenilabri, Galactosomum lacteum, Con...

Three species of fish, caught at various distances from a kraft pulp ai:d paper mill effluent discharge in Nipigon Bay, were analyzed for organic contaminants. Fishes from all sites contained residues of polychlorinated biphenyls and DDE. Most samples were also contaminated with hexachlorobenzene and several samples contained phthalic acid esters. From sampling sites close to the mill discharge...