نتایج جستجو برای: salar complex
تعداد نتایج: 787068 فیلتر نتایج به سال:
A.S. BOGEVIK 5 , D.R. TOCHER, E. LANGMYHR, R. WAAGBØ 5 & R.E. OLSEN 1 Institute of Marine Research, Matre Aquaculture Research Station, N-5984 Matredal; 2 Institute of Aquaculture, University of Stirling, Stirling, Scotland FK9 4LA, UK; 3 Norwegian Institute of Fisheries and Aquaculture Research, Fyllingsdalen, Norway; 4 National Institute of Nutrition and Seafood Research (NIFES), Bergen, Norw...
In the first part of this paper, we review the evolutionary aspects of age and longevity in fish and then summarize the theory of maturity due to Ray Beverton. This theory allows one to predict age at maturity (and thus a putative point for the onset of senescence) from information on growth rate and mortality rate. We illustrate the application of this theory with data on tilapia species and t...
In Scotland and elsewhere, there are concerns that escaped farmed Atlantic salmon (Salmo salar L.) may impact on wild salmon stocks. Potential detrimental effects could arise through disease spread, competition, or inter-breeding. We investigated whether there is evidence of a direct effect of recorded salmon escape events on wild stocks in Scotland using anglers' counts of caught salmon (class...
Organisms can modify their surrounding environment, but whether these changes are large enough to feed back and alter their evolutionary trajectories is not well understood, particularly in wild populations. Here we show that nutrient pulses from decomposing Atlantic salmon (Salmo salar) parents alter selection pressures on their offspring with important consequences for their phenotypic and ge...
Habitat fragmentation is a growing problem worldwide. Particularly in river systems, numerous dams and weirs hamper the movement of a wide variety of species. With the aim to preserve connectivity for fish, many barriers in river systems are equipped with fishways (also called fish passages or fish ladders). However, few fishways provide full connectivity. Here we hypothesized that restricted s...
A common challenge in species conservation and management is how to incorporate species movements into management objectives. There often is a lack of knowledge of where, when, and why species move. The field of movement ecology has grown rapidly in the last decade and is now providing the knowledge needed to incorporate movements of species into management planning. This knowledge can also be ...
[This corrects the article DOI: 10.1371/journal.pone.0187476.].
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