The aim of this work was to determine the composition of the fish assemblage of Passa Cinco stream and verify changes in their structure on the altitudinal gradient. Six samples were performed at five different sites in Passa Cinco stream (from the headwater, at order two, to its mouth, at order six), using an electric fishery equipment and gill nets in May, July, September and November of 2005...

BACKGROUND AND OBJECTIVES: The eutrophication process is increased by anthropogenic or aquaculture facilities in marine ecosystems. DNA damage biomarkers for fish species detect genotoxic parameters for ecological risk assessment. The aim of the present study was to determine genotoxic potential induced by marine cage culture in Iskenderun Bay on gilthead sea bream (Sparus ...

We investigated the involvement of carbonic anhydrase (CA) in mediating V-H(+)-ATPase translocation into the basolateral membrane in gills of alkalotic Squalus acanthias. Immunolabeling revealed that CA is localized in the same cells as V-H(+)-ATPase. Blood plasma from dogfish injected with acetazolamide [30 mg/kg at time (t) = 0 and 6 h] and infused with NaHCO(3) for 12 h (1,000 microeq.kg(-1)...

Background: Histological studies in organs like hepatopancreas and gill of the freshwater fish, Cyprinus carpio, were made to assess tissue damage due to sub-lethal concentration of cadmium after a long exposure period. Methods: This study was conducted in University of Tehran, in 2013. The fish were divided into two groups in 1000 litre fiberglass tanks supplied with dechlorinated water [hard...

Length weight relationships of Vimba vimba persa were studied. For this purpose 174 fish samples were collected by gill nets, beach seine and purse seine from March through June 2008 at two Guilan fisheries catch stations of Guilan located in Anzali- Kiyashahr regions. Samples were immediately transferred to the laboratory of fish biology at University of Guilan for further an...

Length weight relationships of Vimba vimba persa were studied. For this purpose 174 fish samples were collected by gill nets, beach seine and purse seine from March through June 2008 at two Guilan fisheries catch stations of Guilan located in Anzali- Kiyashahr regions. Samples were immediately transferred to the laboratory of fish biology at University of Guilan for further an...

The fish gill, as one of the mucosal barriers, plays an important role in mucosal immune response. The fish swimbladder functions for regulating buoyancy. The fish swimbladder has long been postulated as a homologous organ of the tetrapod lung, but the molecular evidence is scarce. In order to provide new information that is complementary to gill immune genes, initiate new research directions c...

 Concentration of heavy and toxic metals Cu, Zn, Cd, Pb and Hg were determined in liver and muscles of Rutilus frisii kutum and their relationships with growth parameters (length, age, condition factor) and hepatosomatic index were examined. Thirty-six fish samples were collected from February through March 2009 caught by beach seine in the southwest parts of the Caspian Sea. Atomic absorption ...

Fish stocking is one efforts to optimize fish production. 137,000 including tilapia, silver barb, common carp and giant prawns were stocked in the Penjalin Reservoir. This study aims evaluate distribution of several types Reservoir ability utilize feed space resources, growth chances being caught by fishermen. The method used stratified random sampling. research was conducted from December 2021...

Histopathology provides a rapid method to detect effects of irritants and pathogens in different organs and it can be considered as the indicator for abnormal condition for fish environment. The present study was initiated to record the histopathological lesions of gill and skin associated with external parasites in two common aquarium fish, Oscar (Astronotus ocellatus) and Discus (Symphysodon ...