Ten primer pairs were screened to develop single nucleotide polymorphism (SNP) TaqMan assays that will distinguish California golden trout and some rainbow trouts (Oncorhynchus mykiss sspp., O. m. aguabonita) from the Paiute and Lahontan cutthroat trouts (Oncorhynchus clarkii seleniris, O. c. henshawi). From these 10 primer pairs, one mitochondrial and five nuclear fixed SNP differences were di...

The phylogeny of salmonid fishes has been the focus of intensive study for many years, but some of the most important relationships within this group remain unclear. We used 269 Genbank sequences of mitochondrial DNA (from 16 genes) and nuclear DNA (from nine genes) to infer phylogenies for 30 species of salmonids. We used maximum parsimony and maximum likelihood to analyze each gene separately...

Critical slowing down (CSD) reflects the decline in resilience of equilibria near a bifurcation and may reveal early warning signals (EWS) of ecological phase transitions. We studied CSD in the recruitment dynamics of 120 stocks of three Pacific salmon (Oncorhynchus spp.) species in relation to critical transitions in fishery models. Pink salmon (Oncorhynchus gorbuscha) exhibited increased vari...

the object of this study was detecting protein and lipid contents on two types on iranian oncorhynchus mykiss & franciscan oncorhynchus mykiss for detect better samples on quality. in this research two methods were used for determining lipids (suxeleh) and proteins (kajheldal). results have revealed the lipid contents in iranian samples were 4.88 , 5.18 and 5.96 and in franciscan samples were 4...

Seasonal timing of life-history events is often under strong natural selection. The Clock gene is a central component of an endogenous circadian clock that senses changes in photoperiod (day length) and mediates seasonal behaviours. Among Pacific salmonids (Oncorhynchus spp.), seasonal timing of migration and breeding is influenced by photoperiod. To expand a study of 42 North American Chinook ...

The aim of this study was to establish whether two lines of rainbow trout divergent for their plasma cortisol response to a standardized stressor would show consistent differences in their behavioural response to a range of challenging situations. Our results show that the high- and low-responding (HR and LR) lines of rainbow trout did not differ in the aggression shown towards an intruder or i...

We isolated and characterized 11 microsatellite loci from Plagioporus shawi , a parasitic trematode of salmonid fishes ( Oncorhynchus spp.). Extensive polymorphism (expected heterozygosities ranging from 0.476 to 0.981 and number of alleles from 10 to 55) was found in a sample of 94 trematodes from 24 infected cutthroat trout ( Oncorhynchus clarki ) individuals. Nine of the 11 loci will be usef...

a Department of Seafood Chemistry, Institute for Marine Research (IIM-CSIC), Vigo, Spain b Department of Food Science and Chemical Technology, University of Chile, Santiago, Chile c Health Environment Service, Santiago, Chile d Department of Microbiology, University of Santo Tomás de Aquino, Santiago, Chile Rancidity development during the chilled storage of farmed Coho salmon (Oncorhynchus kis...

Recent advances in gene technology have been applied to create fast-growing transgenic fish, which are of great commercial interest owing to their potential to shorten production cycles and increase food production. However, there is growing concern and speculation over the impact that escaped growth hormone (GH)-transgenic fish may have on the natural environment. To predict these risks it is ...