The monogenean ectoparasite, Gyrodactylus salaris Malmberg, 1957, has had a devastating effect on wild Atlantic salmon (Salmo salar) since its introduction to Norway in the mid-1970s. In Lake Pålsbufjorden, southern Norway, upstream of the stretches of the River Numedalslågen with anadromous Atlantic salmon, a resident Arctic charr (Salvelinus alpinus) population has been reported to be infecte...

Concentrations of 160 polychlorinated biphenyl (PCB) congeners or congener groups were determined in approximately 600 farmed Atlantic salmon from around the world and wild (ocean-caught) Pacific salmon from the Northeast Pacific. Concentrations and PCB congener profiles were analyzed to provide insight into the sources and uptake of PCBs in salmon as well as regional differences. Although tota...

Gill disease in Atlantic salmon, Salmo salar L., causes big losses in the salmon farming industry. Until now, tools to cultivate microorganisms causing gill disease and models to study the gill responses have been lacking. Here we describe the establishment and characterization of two cell lines from the gills of Atlantic salmon. Atlantic salmon gill cell ASG-10 consisted of cells staining for ...

Stanniocalcin (STC) is a homodimeric glycoprotein hormone that was first discovered in fish, where it is produced by unique endocrine glands known as the corpuscles of Stannius (CS). In freshwater salmon, STC plays an integral role in Ca2+ and phosphate homeostasis. High levels of extracellular Ca2+promote the synthesis and release of STC, which on entering the bloodstream reduces the levels of...

Salmon carcasses were recorded during October December along spawning streams in 3 study areas: 1 upper Shee Water, R. Tay system (2000 & 2001); 2. Upper Clunie Water, Aberdeenshire Dee system (2000 [part of area] and 2001) and 3. Kinlochewe River, R. Ewe system (2001 only). Estimates of numbers of salmon within each study area are based on fish observations, redd counts and counts at fish trap...

Seasonal stock-specific distribution and abundance of immature sockeye salmon (Oncorhynchus nerka) in the western Bering Sea in summer 2003 and fall 2002-2004 were determined using scale pattern analysis of Bering-Aleutian Salmon International Survey (BASIS) samples. Most (nearly 100%) of the sockeye salmon in BASIS catches were immature. Four age groups, 1.1, 1.2, 2.1 and 2.2, accounted for mo...

Some Pacific salmon populations have been experiencing increasingly warmer river temperatures during their once-in-a-lifetime spawning migration, which has been associated with en route and prespawn mortality. The mechanisms underlying such temperature-mediated mortality are poorly understood. Wild adult pink (Oncorhynchus gorbuscha) and sockeye (Oncorhynchus nerka) salmon were used in this stu...

The stocks of the Atlantic salmon (Salmo salar) in many rivers North America and Europe have declined recent years are experiencing a crisis. Despite their high degree legal protection, quality aquatic environments within sea, including local coastal waters, appears to be deteriorating. Salmon survival, has both sea rivers. status is considered here, together with adverse effects different sour...

Environmental risk assessment of genetically modified organisms requires determination of their fitness and invasiveness relative to conspecifics and other ecosystem members. Cultured growth hormone transgenic coho salmon (Oncorhynchus kisutch) have enhanced feeding capacity and growth, which can result in large enhancements in body size (>7-fold) relative to nontransgenic salmon, but in nature...

We examined 1454 juvenile Chinook salmon, Oncorhynchus tshawytscha (Walbaum), captured in nearshore waters off the coasts of Washington and Oregon (USA) from 1999 to 2004 for infection by Renibacterium salmoninarum, Nanophyetus salmincola Chapin and skin metacercariae. The prevalence and intensities for each of these infections were established for both yearling and subyearling Chinook salmon. ...