Knowledge of potential spread by introduced species is critical to effective management and conservation. The Smallmouth Bass Micropterus dolomieu an example a fish that has been globally, often spreads after introduction, substantial predatory impacts on assemblages. Nonnative in the free-flowing Yellowstone River, Montana, have expanded from warmer, downstream sections river into colder, upst...

  This study was done to investigate of some hematological and biochemical factors of rainbow trout (Oncorhynchus mykiss ) fry in west of Mazandaran in Iran. About 50 pools of blood samples from diseased fry were collected within 30 months from November 2002 till March 2005 from three hatchery farms in western part of Mazanderan province. In addition 30 pools of blood samples as control group w...

This article presents a control system of a fish farm dealing with intensive fish culture. The control system consists of two parts – automation system and optimization package. The automation system watches and controls environment parameters, fish feeding, etc. and offers more comfort to the maintenance, e.g. in the field of scheduled tasks to be performed or concerning alarms signalling. The...

Sediment from three Coldwater River, Mississippi backwaters was examined using 28 day Hyalella azteca bioassays and chemical analyses for 33 pesticides, seven metals and seven PCB mixtures. Hydrologic connectivity between the main river channel and backwater varied widely among the three sites. Mortality occurred in the most highly connected backwater while growth impairment occurred in the oth...

The aim of this research was to determine the concentration of cadmium (Cd) and lead (Pb) in the muscle and liver tissues of rainbow trout (Oncorhynchus mykiss) in Hamedan Province (west of Iran) cold water fish farms, and compare the results with the FAO/WHO guidelines. Heavy metal concentrations were determined from the three randomly selected fish farms by Inductively Coupled Plasma Optical ...

abstract this research was conducted to study the effects of different light colors on growth indices (growth rate and specific growth rate), feed conversion and survival rate in tiger barb (barbus tetazone) fish for 6 weeks. 120 fish with an average weight 75 ±0.02 were respectively divided in four groups of white, natural, green and blue colors (with three replicates for each treatment). fish...

Fluorescent in situ hybridization (FISH) is a molecular cytogenetic technique that exploits the availability of recombinant deoxyribonucleic acid (DNA) technology. In metaphase FISH, a specific nucleic acid sequence (probe) is bound to the homologous segment on a metaphase chromosome in a fixed preparation on a glass slide. The presence of a region-specific DNA sequence in a nondividing cell ca...