Length frequency data of the longtail tuna, Thunnus tonggol collected from October 2006 to September 2007 were analyzed for evaluation of the stock parameters. T. tonggol is mainly caught by gillnet method. Yearly tuna and tuna-like catches in Iran are of the order of 174,234 mt, close to 46% of which are longtail tuna. The VBG parameters for longtail tuna were: L∞ =133.72cm K=0.35 year−1.The l...

Lipid oxidation is the main hurdle for omega-3 fatty acid enrichment in food and beverages. Fat reduces quality safety of supplemented products. A tuna oil-in-water emulsion (20% v/v) was exposed to iron-induced oxidation. Emulsions with changing emulsifiers buffers were analyzed under different storage conditions (argon purging, pH variation) using Conjugated Dienes Thiobarbituric reactive sub...

The presence of heavy metals in the environment could constitute a hazard to food security and public health. These can be accumulated in aquatic animals such as fish. Samples of four popular brands of canned fish in the Iranian market (yellowfin tuna, common Kilka, Kawakawa and longtail tuna) were analyzed for level of Cr after wet digestion with acids using graphite furnace atomic absorption ...

Surveillance for mercury (Hg), lead (Pb) and cadmium (Cd) contamination in tuna products is crucial for consumer food safety. Hg, Pb and Cd contaminants were monitored in a total of 60 specimens of fresh little tunny (Euthynnus alletteratus) and popular brands of skipjack and yellowfin (Katsuwonus pelamis and Thunnus albacares) canned tuna commercially available in Tripoli, Libya. Direct Mercur...

A total of 270 samples, nine lots of 30 samples each, of imported Moroccan food snails was examined for the presence of Salmonella. Eighty-four samples (an overall incidence of 31.11%) and all nine lots contained Salmonella. No significant difference (P greater than 0.25) in the number of positive samples was observed by using either selenite cystine both or tetrathionate broth when the samples...

Carbon-chain length and degree of saturation of dietary fat may influence weight gain. To examine this hypothesis we randomly allotted 100 male, 30-day old, albino rats to each of four groups. Each group was fed, ad libitum, a diet containing, as the only source of fat, either lard (L) or safflower oil (SO) (representing saturated and polyunsaturated fat respectively) or groundnut oil (GO) or c...

The time course for changes in food intake, body weight, plasma glucose and insulin concentrations and HOMA index was monitored over a period of 8 weeks in rats exposed from the 8th week after birth to diets containing either starch or fructose and sunflower oil. In two further groups of rats exposed to the fructose-rich diet part of the sunflower...

Long-term reduction of serum urate levels is vital in the treatment of gout. However, it is difficult to convince gout-free individuals of the necessity of treatment as few appropriate over-the-counter remedies and dietary supplements are available. Therefore, the present study aimed to investigate the antihyperuricemic efficacy and safety of a tuna extract containing the imidazole compounds to...

Hemoglobins from three sharks, the porbeagle (Lamno nusus), the dusky (Carcharhinus obscurus), and the mako (Zsurus oxyrinchus), and four bony fishes, the big-eye tuna (Thunnus obesus), the swordfish (Xiphias gladius), the carp (Cyprius carpio), and the smallmouth bass (Micropefrus dolomieu), have been examined by a variety of techniques to determine both their molecular structure and their kin...