streptococcus iniae is one of the most important agents that causes high mortality and losses in rainbow trout farms in iran and the world. these bacteria can affects the consumers and people who deal with aquaculture via affected fish. so, viability of this bacterium in frozen fish and fish product can be useful for health care of consumers. a total of 90 rainbow trout, with average weight of ...

Aquaculture is a major source of invasive aquatic species, despite the fact that cultured organisms often have low genetic diversity and tend to be maladapted to survive in the wild. Yet, to what extent aquaculture escapees become established by means of high propagule pressure and multiple origins is not clear. We analysed the genetic diversity of 15 established populations and four farmed sto...

The enhanced expression of heat shock proteins (hsps) in organisms can be detected in response to many kinds of stressor. For fish, high temperature is an important stressor, and hsp expression is associated with differences in environmental temperature. In this study, rainbow trout (Oncorhynchus mykiss) that were accustomed to an aquatic temperature of 18°C were exposed to an elevated temperat...

Aquatic total phosphorus (Tot-P) is measured at fish-cages in Lake Huron for environmental regulatory compliance. An improved understanding of how Tot-P is manifested in the near-field (<or=30 m) water column relative to reference sites within the same water body, current movement and farm structures is required to help interpret sample results and refine monitoring protocols where necessary. T...

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...

In this study the efficacy of bacterial culture, simple PCR and nested-PCR techniques for the detection of Yersinia ruckeri in tissues of naturally and experimentally infected rainbow trout (Oncorhynchus mykiss) fry was compared. In order to detect Y. ruckeri in naturally infected rainbow trout tissues, 30 fish suspected of enteric redmouth disease were randomly collected from 6 rainbow trout f...

Excessive accumulation of carcass fat in farm animals, including fish, has a significant impact on meat quality and on the cost of feeding. Similar to farmed animals and humans, the liver can be considered one of the most important organs involved in lipid metabolism in rainbow trout (Oncorhynchus mykiss). RNA-seq based whole transcriptome sequencing was performed to liver tissue of rainbow tro...

Rainbow trout (Oncorhynchus mykiss) is one of the most-widely cultivated cold fresh water fish in the world. Gamasyab River, with a length of about 200 Km, is one of the longest rivers of Iran. The aim of this research is to determine the effects of trout farm effluents on this river water.  From a total of 24 trout farms in the area,  four farms were randomly selected and three sampling statio...

The objectives of the present study were to compare growth performance and feed conversion ratios of brook trout (Salvelinus fontinalis) and Black Sea trout (Salmo trutta labrax) in monoculture and duo-culture tank reared conditions. The fish were about 9-month-old hatchery reared brook trout and Black Sea trout with initial weights of 24.18±0.64 (n=60) and 23.87±1.11 (n=60) g, respectively. Fi...