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Hatchery-produced white bass ( Morone chrysops ) and striped bass ( M. saxatilis ) reared to maturity in a commercial aquaculture facility, were successfully spawned using controlled-release delivery systems containing the gonadotropin-releasing hormone analog DAla 6 , Pro 9 (NEt)-GnRH (GnRHa)....
Saprolegnia parasitica has caused large mortalities in brown trout, Salmo trutta , in Spain. Several strains of Saprolegnia parasitica have been isolated from these epizootics and characterized regarding their physiological adaptation and genetic diversity. These isolates exhibit similar...
The susceptibility of freshwater and marine fish to infection by Flexibacter columnaris and Flexibacter maritimus was assessed in laboratory based experiments. Flexibactor columnaris produced a more severe disease in barramundi compared to goldfish. Both species suffered greater mortality at 25...
A histological study was made of the reproductive cycle of captive sharpsnout seabream Diplodus puntazzo during the 3rd year of life. All specimens contained both ovarian and testicular tissue. Ovarian tissue prevailed in 64 out of 120 fish sampled throughout one year. The ovary underwent a long...
The technology is now in place for major advances in the genetics and cytogenetics of fishes at the molecular level. One promising method with broad application is fluorescence in situ hybridization (FISH). Methodologies of FISH and the current and potential uses of these chromosomal techniques...
A study of the efficacy of azamethiphos (S-6-chloro-2,3-dihydro-2-oxo-1,3-oxazolo(4,5-b)pyridin-3-ylmethyl 0,0-dimethyl phosphorothioate) is described when used to treat Atlantic salmon ( Salmo salar ) infected with sea lice ( Lepeophtheirus salmonis and Caligus elongatus ) at several salmon...
The role of biofilm in the survival and persistence of the bacterial shrimp pathogen Vibrio harveyi and its possible role in perpetuating infection in shrimp hatcheries was studied. Vibrio harveyi formed biofilms on all three substrates tested: cement slab, high density polyethylene (HDPE)...
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