Sea lice are marine ectoparasitic crustacea which limit the potential for sustainable salmon aquaculture due to risks of impacts on iconic wild and sea trout. Control parasite farms costs an estimated 9% farm revenue. develop through planktonic nauplii copepodid stages attach to, mature on, salmonid hosts until females become ovigerous (egg laying) Impacts fish depend their exposure larval tran...

Reliable fish condition estimates help managers better understand ecosystem population dynamics. Therefore, our study objectives were to measure seasonal changes in percent dry weight and energy density (physiological-based measures of condition) of stream-dwelling Appalachian Brook Trout Salvelinus fontinalis, field-validate bioelectrical impedance analysis (BIA) models, and compare reliabilit...

The purpose of this investigation was to explore the ontogeny of certain respiratory responses of rainbow trout. Adult trout respond to hypoxia with an increase in the flow of water over the respiratory surfaces, and with a reflex bradycardia (Holeton & Randall, 1967). When adult rainbow trout are exposed to 5% carbon monoxide (CO) and thus rendered anoxaemic while at the same time their arteri...

Marine Scotland is the directorate of the Scottish Government responsible for the integrated management of Scotland's seas. Marine Scotland Science (formerly Fisheries Research Services) provides expert scientific and technical advice on marine and fisheries issues. Scottish Marine and Freshwater Science is a series of reports that publish results of research and monitoring carried out by Marin...

The manuscript summarizes the results of a travel cost model developed for recreational angling in Michigan. The model and method are briefly described. The discussion focusses on how Great Lakes trout and salmon catch rates were related to angler behavior. The model is used to value changes in trout and salmon catch rates at Great Lakes fishing sites in Michigan. Fish population levels can be ...

We report for the first time that beta-naphthoflavone (BNF) abolishes ACTH stimulation of cortisol production in rainbow trout (Oncorhynchus mykiss). There was significantly higher hepatic cytochrome P450 content and ethoxyresorufin O-de-ethylase and uridine-5'-diphosphoglucuronic acid transferase activities in BNF-treated fish than in sham-treated controls. BNF did not significantly affect eit...

In this study, histamine level and some other quality parameters have been examined in anchovy, horse mackerel, mackerel, rainbow trout, mirror carp and barbel consumed as fresh in Elazig. For this purpose, fish samples were obtained 15 day intervals between September 2003 and April 2004 and they were filleted. Histamine, TMA-N, TVB-N and pH values were examined in these fillets.Mean histamine ...

Discocotyle sagittata oncomiracidia were rapidly killed when incubated in naïve plasma and immune sera from both rainbow trout (Oncorhynchus mykiss) and brown trout (Salmo trutta), the killing proceeding at a faster rate with blood material from the latter fish species. The lethal activity of naïve plasma and immune sera was comparable. This was abolished after incubation at 45 degrees C for 30...

The innate immune system of fish is critical for rapid detection and immediate response to infection, as well as to orchestrate the adaptive branch of the immune system. Rainbow trout Oncorhynchus mykiss ladderlectin and intelectin are plasma pattern recognition receptors (PRR) for bacterial and fungal pathogens of rainbow trout, but their role as PRRs for virus is unknown. Viral hemorrhagic se...

The 70-kDa family of heat shock proteins plays an important role as molecular chaperones in unstressed and stressed cells. The constitutive member of the 70 family (hsc70) is crucial for the chaperoning function of unstressed cells, whereas the inducible form (hsp70) is important for allowing cells to cope with acute stressor insult, especially those affecting the protein machinery. In fish, th...