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A laboratory feeding trial was conducted for 80 days using rohu, Labeo rohita, fingerlings (5.67 ±0.25 g) to evaluate the optimum dietary carbohydrate level. Five semipurified diets containing 30, 35, 40, 45, and 50% carbohydrate (diets D1 to D5) were formulated and fed to triplicate groups of fish. All the diets were isonitrogenous (35% protein) and almost isocaloric. Fish performance in terms of...
A 60-day feeding experiment was conducted in the laboratory to evaluate the interactive effects of dietary protein and carbohydrate levels on growth, feed utilization efficiency, and nitrogen metabolism in rohu, Labeo rohita fingerlings (mean weight 4.06 ±0.08 g). Nine purified diets prepared with 25, 35, and 40 % protein level each having 15, 25, and 35 % carbohydrate were fed to nine different feeding...
A 21-day feeding experiment was conducted to assess the effects of diets supplemented with fish intestinal bacteria producing extracellular enzyme on growth and survival of rohu, Labeo rohita (Hamilton) spawn (average weight 0.3 mg). Intestinal bacteria were isolated from healthy rohu fingerlings (average weight 3.51 ±0.31 g). Six isocaloric (4.24 kcalּg-1) and isonitrogenous (approximately 35% crude...
Background. Sea lice (Copepoda: Caligidae) are important pathogens in aquaculture, and because more fish species are being intensively cultured, more species of sea lice are recognized as pathogens. The aim of the present study was to gather baseline data regarding the effects of sea lice on a valuable sciaenid (Sciaenidae), the black drum, Pogonias cromis, by describing lesions associated with naturally...
Background. Luminous vibriosis caused by Vibrio harveyi, is a serious disease problem in shrimp aquaculture. The use of "green water", a technique that involves the stocking of tilapia, Oreochromis in the reservoir for the production of green microalgae, Chlorella is believed to help in the reduction of the incidence of luminous vibriosis. Though most shrimp farmers have been using Mozambique...
Background. The aquaculture rainbow trout may be a valuable source of long chain n-3 polyunsaturated fatty acid (LC n-3 PUFA). In the retail these fish are mainly present as a whole or gutted. The present study was aimed at comparing changes occurring in lipids of whole and gutted rainbow trout stored in ice. Materials and Methods. The analysis were performed after 0, 3, 7, and 14 days of storage...
Background. The purpose of this study was to determine the timing of gonadal differentiation in two gadoids: Atlantic cod, Gadus morhua L., and haddock, Melanogrammus aeglefinus (L.). This information is required to develop a practical protocol for the production of monosex populations of these species for aquaculture. Materials and Methods. Cultured larvae and juveniles were collected weekly, measured...
Five combinations of human chorionic gonadotropin (hCG) dose and five latency periods were evaluated to observe the pattern of deformed larvae among the hatchlings in walking catfish, Clarias batrachus (L.). A higher percentage (7%–12%) of deformed larvae were observed at 1000, 2000, and 5000 IU · kg-1 with 14–23 h latency combinations. The results of the study indicated that 3000 IU · kg-1 with 14–23...
Background. The aim of this work was to study the growth of juvenile dentex fed on cooking-extruded diets,determine the level of substitution of fishmeal by soybean meal may be without affecting the growth in his species and its digestibility. Materials and Methods. The availability of defatted soybean meal as a substitute for fish meal was evaluated In juvenile (41 g on average) dentex by feeding...
Background. The Siberian sturgeon, Acipenser baeri, is one of the most important sturgeon species cultured in Poland. The effective management of aquaculture production of this species requires contemporary knowledge of broodstock structure, mating patterns, and genetic diversity of broodstock. The aim of the present study was the application of microsatellite DNA analysis for estimation of gene diversity...
Background. Our previous study demonstrated that sharpsnout seabream, Diplodus puntazzo (Walbaum, 1792), can be fed with up to 34.8% sunflower meal (SFM), with excellent results in growth parameters and feed efficiency. The aim of the current study was to test the replacement of fish meal with SFM in the diet formulation for sharpsnout seabream and to evaluate growth, nutritive parameters, amino acid...
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