DNA transfer techniques allow genetic manipulation of commercial fish. However, marine species have received little attention because of their difficult zootechnical requirements. The seabream (Sparus aurata) has become one of the most important species in the aquaculture of Mediterranean countries, and the development of suitable DNA transfer procedures represents a main step in its genetic im...

The present research looked at the ability of gilthead seabream to discriminate between two similar diets differing only in the extent of lipid oxidation. Six groups of 4 fish (254g initial wet weight) were allowed to select by means of self-feeders between two complete diets (34.5% casein + gelatin, 14.8% fish oil + soybean oil, 24.8% dextrin and 25.9% vitamins, minerals, filler and binder) wh...

This study compared for seabream, Sparus aurata exposed to benzo(a)pyrene-B(a)P-, the response of molecular cytochrome P450 1A (CYP1A) and cellular histopathology biomarkers. Male gilthead seabream, Sparus aurata specimens were exposed for 20 days via water to a series of high B(a)P concentrations. CYP1A was assessed by measuring enzymatic activity (EROD) and CYP1A protein content, and cellular...

Bony fish is highly sensitive to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) exposure, especially at early developmental stages. TCDD induces various toxic effects including yolk sac edema, craniofacial malformation and neural damage in developing fish embryos. However, the effects of TCDD on the peripheral nervous system (PNS) of fish remain unclear. To clarify whether TCDD affects the morpholo...

Abstract Yellowfin tuna Thunnus albacares is one of the major species caught in Fisheries Management Area (FMA) 573 Indian Ocean. Its production contributed to 35.83% total 2013. The study was conducted assess population dynamics this FMA 573, based on length-frequency data collected 2013-2017, and analysed using FiSAT II software. results obtained show length-weight relationship W = 0.000052 F...

Yellowfin tuna is one of the commercially important fish varieties, and inappropriate storing may deteriorate its safety quality. This study aimed to investigate microbial composition quality characteristics yellowfin stored at different temperatures for varying amounts time. With an increase in storage temperature time, biogenic amines, total volatile basic nitrogen TVB-N, viable cell count st...

Pollutants have been reported to disrupt the endocrine system of marine animals, which may be exposed through contaminated seawater or through the food chain. Although 17α-ethynylestradiol (EE₂), a drug used in hormone therapies, is widely present in the aquatic environment, current knowledge on the sensitivity of marine fish to estrogenic pollutants is limited. We report the effect of the diet...

The antibacterial activity present in the s k ~ n mucus of turbot Scophthalmus maximus, seabream Sparus aurdtd and seabass Dicentrarchus labrdx against Pasteul-ella piscicida and Flex~bacter maritimus was evaluated. Using assays on agar plates, none of the mucus samples from the above fish showed any antibacterial activity against E maritimus isolates. Turbot mucus inhibited the growth of the P...

The ice crystal formation is assumed as the most lethal factor for the failure of fish embryo cryopreservation and intracellular ice formation (IIF) plays a central role in cell injury during cooling. The objectives were to observe the morphological changes of red seabream (Pagrus major) embryo during the cooling-thawing process, and to examine the effect of cryoprotectant and cooling rate on t...

A simple and sensitive polymerase chain reaction (PCR) based assay is described for detection of the red sea bream iridovirus (RSIV) in infected fish. The assay involves amplification of a portion of the ribonucleotide reductase small subunit (RNRS) gene of the virus from DNA isolated from the spleen. The system was tested on red sea bream following an experimental infection. In our infection m...