organochlorine contaminants are highly stable and dangerous compounds, which are widespread in the environment. among these compounds, polychlorinated biphenyls (pcbs) are carcinogenic for humans and can also affect intellectual functions and the nervous, immune and reproductive systems. aquatic organism especially fishes are known to be main routes for e entrance of these compounds to the huma...

Observations on the sperm biology of Bunnei (Barbus sharpeyi), after hormone injection perm activity for injected fish ranged between 85 % - 100 %. The most amazing finding was collected semen from deceased one hour 90 %, and it has highest time(120 sec.), this time higher than that Al-Therthar reservoir during spawning season. volume very low (1- 0.4 ml). which is a characteristic species. con...

fish is one of the important nutrient sources in many parts of the world. consumption of fish like other parts of the world is high in khoozestan province. the role of fish in transmission of some parasitic agents to human is investigated by many researchers. this study aims to investigate internal and external zoonosis parasites and the importance of these parasites in transferring disease in ...

The study include the description of fish assemblage in Al- Saffia reservation during period March 2006 to February 2007. Sixteen osteichthyes species were obtained, highest number 13 was recorded July and lowest 7 November January. largest individuals collected obtained (212) (124). Four formed 71.02% Alburnus mossulensis 20.64 % Liza abu19.62 Barbus luteus16.13 Carassius auratus 14.46 %. annu...

hemoglobin is a porphyrin containing protein with an a2b2 tetrameric structure and like other porphyrin compounds shows spectral behavior of species specific characteristics. researchers tend to relate bands in the hemoglobin spectra to certain structural and/or functional features. given the fact that hemoglobin is the main oxygen carrier in animals functioning through the oxy«deoxy equilibriu...

the geometric morphometrics method was applied to study the morphological differences in 95 specimens of kura barbel (barbus lacerta, heckel 1834) collected from three riverine ecosystems of the sefidrud basin, viz. taleghan, totkabon and kloraz rivers.  for this purpose, the left sides of the specimens were photographed. then, 14 landmark-points were defined and digitized on 2d pictures using ...