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Patriche T.,University of Galati | Patriche N.,Institute for Research and Development in Aquatic Ecology | Bocioc E.,University of Galati | Coada M.T.,University of Galati
AACL Bioflux | Year: 2011

Despite advances in ichthyo-pathology of recent years, interpretation of fish serum biochemical parameters is often difficult by lack of reference values. That is why to know the value of the serum biochemical parameters can be a useful tool for monitoring health status, detecting illnesses and responses to therapy. This paper provides data concerning biochemical composition of carp serum (Cyprinus carpio) bred at Brateş Farm of Institute of Research and Development for Aquatic Ecology, Fishing and Aquaculture from Galaţi and Pleaşa Farm from Ploieşti, Romania. In research conducted on Cyprinus carpio were determined following serum biochemical parameters: glucose (GLU), total proteins (TP), blood urea nitrogen (BUN), cholesterol (CHOL), triglyceride (TRIG), sodium (Na), potassium (K), calcium (Ca), magnesium (Mg), phosphorus (P), iron (Fe). Source


Coada M.T.,University of Galati | Patriche N.,Institute for Research and Development in Aquatic Ecology | Cristea V.,University of Galati | Costache M.,Research Development Center for Pisciculture Nucet | And 2 more authors.
AACL Bioflux | Year: 2011

The main purpose of the present experiment consists in evaluating the growth performances of North-American sturgeon larvae (Polyodon spathula (Walbaum, 1792)), raised in the recirculating system. Growth performance is influenced by many factors including food quality, quantity of food, culture species, fish size and water quality. The research was conducted between May 12th to June 8th, 2010, in the pilot laboratory of Department of Aquaculture, Environmental Science and Cadastre of the Faculty of Food Science and Engineering, Galaţi. Ewos type growing unit (1.40 x 1.40 x 0.40 m) was populated with 1500 larvae with an age of 72-120 hours and with an average weight of 8±0.2 mg/larva. During the experiment the physico-chemical water parameters were within the admissible limit of sturgeons growth (temperature 4-26oC, dissolved oxygen 5-14 mg L-1, pH 6.5-8.5, N-N03- 1-20 mg L-1, N-NO2- 0-0.01 mg L-1, N-NH4+ 0.05-2 mg L-1). The experiment results indicated a 78% survival and an individual body biomass of 1.15 ± 0.21 g. The research goal is to achieve the following objectives: a.optimization of feeding parameters (ratio, fodders type and frequency) and the efficiency of different fodders types usage (conversion signs of fodders); b. providing the conditions for the biological material adaptation to the growth condition of the recirculating system. Source


Oprea L.,University of Galati | Cristea V.,University of Galati | Patriche N.,Institute for Research and Development in Aquatic Ecology | Sion C.,University of Galati | And 5 more authors.
Journal of Environmental Protection and Ecology | Year: 2011

The paper is presenting aspects regarding the influence of food quality on the breeding of Siberian sturgeon, in a recirculating aquaculture system (RAS). The experiment took place over 30 days, in 4 pilot breeding units of aquaria type of 300 1 in volume. Two kinds of variants were compared with repetition, V1 with 46% crude protein and V2 with 30% crude protein, respectively. The stocking density was of 16 fish/unit. The same feeding level of 20 g/kg metabolic weight (3% from total biomass) was used in every unit. The parameters of fish breeding showed that changing the quality of fodder, the fish growing was positively influenced. This experiment showed that Acipenser baerii is a sturgeon with a rapid growth rate and it is possible to obtain an increase of fish biomass using pellets with 30-46% crude protein. Source


Savin C.,Institute for Research and Development in Aquatic Ecology | Cristea V.,University of Galati | Talpes M.,Institute for Research and Development in Aquatic Ecology | Ionescu T.I.,University of Galati | And 3 more authors.
Journal of Environmental Protection and Ecology | Year: 2011

In recirculating aquaculture systems, the main pollutant factor is the total ammonia nitrogen (TAN). The ammonia from water is present in two forms: molecular ammonia (unionised, NH 3) and ionised ammonia (NH 4 +). Temperature and pH have influence over the ratio of the molecular ammonia and unionised ammonia in water, the water acidity being the most influential. Following technological water treatment, to bring it to a good quality for rearing the sturgeon, the quantity of total ammonia nitrogen was decreased from 0.3322 ± 0.283 mg/l (at entry into the filtration system) to 0.092 ±0.115 mg/1 (out of the filtration system). The removal rate of total ammonia nitrogen (TAN) has recorded a good value (60%), which did not affect the growth parameters. Ammonia concentration in water, at the outlet of the filter system, has presented values ranging between 0.0003 and 0.018 mg/l (average: 0.0037 ± 0.005 mg/l). The share of the unionised ammonia (molecular) in TAN was 4.4% while that of the ionised ammonia was 95.6%. Source

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