Coho salmon (Oncorhynchus kisutch) transgenic for growth hormone (GH) show substantially faster growth than wild-type (WT) fish. We fed GH-transgenic salmon either to satiation (1 year; TF) or the same smaller ration of wild-type fish (2 years; TR), resulting in groups matched for body size to WT salmon. The myotomes of TF and WT fish had the same number and size distribution of muscle fibres, ...

The changes in the activities of mucus hydrolytic enzymes and plasma cortisol levels were examined following infection of Atlantic salmon Salmo salar with the salmon louse Lepeophtheirus salmonis and these changes were compared with those resulting from elevated plasma cortisol. Salmon were infected at high (Trial 1; 178 +/- 67) and low (Trial 2; 20 +/- 13) numbers of lice per fish and the acti...

The world's demand for fish products food and industrial purposes has already significantly exceeded the reproduction capacity of wild fish. Further increasing exploitation natural populations leads to a sharp reduction in their numbers degradation population biodiversity. only way solve problem is develop artificial This applies primarily salmon, which are most valuable popular types In Murman...

The global increase in the production of domestic farmed fish in open net pens has created concerns about the resilience of wild populations owing to shifts in host-parasite systems in coastal ecosystems. However, little is known about the effects of increased parasite abundance on life-history traits in wild fish populations. Here, we report the results of two separate studies in which 379 779...

BACKGROUND Infectious salmon anaemia (ISA) is a viral disease of marine-farmed Atlantic salmon (Salmo salar) caused by ISA virus (ISAV), which belongs to the genus Isavirus, family Orthomyxoviridae. The virus is considered to be carried by marine wild fish and for over 25 years has caused major disease outbreaks in marine-farmed Atlantic salmon in the Northern hemisphere. In the Southern hemisp...

Osmolality and circulating levels of estradiol-17P, thyroxine, androgens, progesterone, and sodium are measured concomitantly with determination of oocyte maturation in coho salmon (Oncorhynchus kisutch) during the spawning season. Male and female salmon are held in both fresh water (their natural environment) and seawater (an unnatural environment) throughout the season. During the early stage...

M74 syndrome is a thiamine responsive disease of Baltic salmon (the Baltic group of Salmo salar L.) leading to the death of nearly all yolksac fry of certain females (see e.g. Koski et al. (1999)). Börjeson et al. (1995) reported that M74 syndrome in Baltic salmon in Swedish rivers was bound to the females, while milt from wiggling males – fish showing symptoms of a thiamine related-illness (La...

Pink, chum, and sockeye salmon and steelhead trout produced an anti-viral interferon-like response following intraperitoneal injections of the dsRNA synthetic polymer poly inosinic:cytidylic acid (Poly 1:C). In all cases, maximum anti-viral titers were reached between 3 and 7 d post-injection with Poly 1:C. Following mjection with Poly I:C, chum and sockeye salmon were challenged with Infectiou...

Microalgae, as primary producers of EPA and DHA, are among the most prominent alternative sources to fish oil for n-3 long-chain PUFA in animal and human nutrition. The present study aimed to assess technical, nutritional and fish health aspects of producing n-3-rich Atlantic salmon (Salmo salar) fish fillets by dietary supplementation of increasing levels of a DHA-producing Schizochytrium sp. ...

Diphyllobothriosis is reemerging because of global importation and increased popularity of eating raw fish. We detected Diphyllobothrium nihonkaiense plerocercoids in the musculature of wild pink salmon (Oncorhynchus gorbuscha) from Alaska, USA. Therefore, salmon from the American and Asian Pacific coasts and elsewhere pose potential dangers for persons who eat these fish raw.