beluga sturgeon ( huso huso linnaeus, 1758) fingerlings are released into the caspian sea for recruiting and enhancing commercial and recreational fishing purposes. these fingerlings are reared in fresh water, but released to the estuaries that may be caused mortalities due to acute osmotic stress. in this study, the fingerlings in whole ( in vivo ) or their gill tissue ( in vitro ) were expose...

The U.S. catfish industry is seeking production systems that are efficient, intensive, and profitable. Growing foodsize stocker-sized fish in the same pond attractive as it often difficult to obtain larger-sized stockers early each year. This case study evaluated performance economics of producing hybrid fingerlings in-pond raceway (IPRS) placed into four 0.4 ha ponds. Growout raceways (RW1/RW2...

artificial fertilizers and mainly organophosphate herbicide are used by farmers to enhance their crop and control pests. in order to investigate the effects of pretilachlore, fingerlings of caspian roach were exposed to a range of concentrations of toxin close to those of estuary for 96 h. due to movement of these fingerlings in a gradient of salinity from freshwater to brackishwater some physi...

Context Following recent major fish kill events, there is increasing interest in stocking Murray cod fingerlings to help stocks recover. Strategies that can increase post-release survival of stocked are important for conservation and may also have application other species.Aims The aim this work was evaluate whether pre-release predator recognition avoidance training conferred a advantage on (M...

In this study, growth and survival of the Caspian whitefish, Rutilus frisii kutum, (mean weight 0.59±0.06g) have been estimated at different rearing salinities (0, 5 and 10‰) and temperatures (24 and 28˚C). Maximum fish weight gain (493.65±14.07%) and specific growth rate (SGR) (2.74±0.15%), and minimum feed conversion ratio (FCR) (1.66±0.06) were obtained at salinity of 5‰ and temperature of 2...

 This study was conducted in two phases on sturgeon larvae and fingerlings produced from artificial breeding of five pairs of the Persian sturgeon (Acipenser persicus) broodstocks in Shahid Beheshti Hatchery in spring and summer 2006. Initially, 600 larvae were collected on 3 post days hatching (pdh) and 5 days after the onset of exogenous feeding. The second phase was conducted with 450 specim...

Comparative impact assessment of varying salinity concentration on growth, survival and blood chemistry tilapia fingerlings

the inhibition of pathogens growth as well as the shelf-life extension of seafood as a perishable product using safe methods is one of the most important issues that have been attracted fisheries and food science researcher’s attention. the purpose of this study was to evaluate the inhibitory effect of bunium persicum essential oil (eo) on inoculated listeria monocytogenes growth in simulated b...

heavy metal accumulation in the aquatic ecosystems is a main concern which threats human health. in this study two commercial fish species, rutilus kutum and chelon aurata were selected for assessing heavy metal (cd, pb, zn) concentrations in gill and liver tissues at babolsar’s coast, the southern caspian sea, iran. babolsar is one of the important fishery stations in the southern caspian sea....