abstract 900 rainbow trout (mean weight 25 gr) were obtained from a local fish farm in urmia city and after acclimatization for 10 days, the fish were randomly divided into four groups (with three replication) and fed for 8 weeks with 0 (control), 2/5, 5 and 10 g chitosan/kg feed, respectively. finally treatments were fed the control diet (without any chitosan) for another 3 weeks. body weight,...

A study was conducted in Louisburg, North Carolina, to determine the effect of level spreader–vegetative filter strip (LS-VFS) storm-water control measures (SCMs) on runoff temperature and thermal loading. Two LS-VFS systems draining an urban catchment were monitored during the summers of 2008 and 2009. The first VFS was 7.6 m wide and entirely grassed. The second was 15.2 m wide, with the firs...

The impact of the salmon louse (Lepeophtheirussalmonis (Kroyer)) on populations of sea trout andsalmon in Ireland and other European countries isoutlined and recommendations are made for themanagement of marine salmon farms aimed atminimising such impacts. The paper describes thegrowth of the salmon farming industry in westernIreland during the 1980s and the resu...

High levels of pharmaceuticals, including fluoroquinolones (FQs), have been detected in the effluent from an Indian waste water treatment plant serving bulk drug production intended for the global market. Responses from short-term effluent exposure were studied in fish and rats through explorative analyses of hepatic mRNA abundance, enzyme activities and blood chemistry parameters. Exposure of ...

The sales figures of antimicrobial (AM) drugs for farmed Atlantic salmon (Salmo salar) and rainbow trout (Oncorhynchus mykiss) in Norwegian aquaculture was high, although varying, in the period 1981-1994. Since then the usage in these species has been negligible in spite of the huge increase in the biomass fish produced. This is mainly due to the introduction of efficient vaccines against the m...

Corn containing aflatoxin can be effectively decontaminated by treatment with gaseous ammonia at atmospheric pressure. Preliminary studies were made of the effect of ammonia level, corn moisture, temperature, and time on the aflatoxin level. Ammonia tolerance tests were carried out on laying hens as were acceptance tests by swine. Toxicity feeding trials with duck/ings, broiler chicks, and trou...

Fish microbiota studies have mostly addressed intestinal bacterial communities because of their role in fish physiology; however, the skin has been studied less despite its as first pathogen barrier host. DNA-based molecular techniques contributed to improving our understanding microbiota, but this approach faces challenges, such low count bacteria healthy skin. To overcome limitation, an RNA-b...

It is now well established that there is a diverse array of chemical discharged into the environment that can mimic or antagonise the action of hormones. These endocrine-disrupting chemicals (EDCs) can thus interact with physiological systems and cause alterations in development, growth and reproduction in wildlife that are exposed to them. As yet, however, there is little information on the re...