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Showing 1 to 20 of 90 for “"Salvelinus"”.
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Áhrif grisjunar á aldurssamsetningu og vöxt bleikju (Salvelinus alpinus) í Löðmundarvatni
Löðmundarvatn er um 1 km2 stórt stöðuvatn á Fjallabaki. Vatnið var fisklaust þar til bleikju var sleppt í það til fiskræktar um 1965. Bleikja er fiskur sem hefur gríðarlegan margbreytileika í svipgerð, lífsferlum og vistfræði. Þar sem ekki er um neina samkeppni að ræða um auðlindir vatnsins …
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Arfgerðagreiningar á stökum basabreytingum í fjórum afbrigðum bleikju (Salvelinus alpinus) í Þingvallavatni
… Þar finnast fjögur afbrigði af bleikju (Salvelinus alpinus): Kuðungableikja, dvergbleikja, murta og sílableikja. Þar sem genatjáning í fósturþroska getur haft mikilvæg áhrif á svipgerðareiginleika hafa Jóhannes Guðbrandsson og samstarfsmenn hans rannsakað umritunarmengi í snemmfóstrum …
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Effects of size, age and photoperiod on hypoosmoregulation in brook trout, Salvelinus fontinalis
Brook trout (Salvelinus fontinalis) raised from eggs under two photoperiod and two feeding regimes were tested for physiological changes preparatory for transition from freshwater to seawater. Size, age, growth rate, photoperiod, and diel rhythms were examined for possible influences on plasma …
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Spatial population dynamics of brook trout (Salvelinus fontinalis) in a central Appalachian watershed
… the spatial population dynamics of brook trout (Salvelinus fontinalis) in a central Appalachian watershed. The objectives of my research were: (1) identify factors that influence reproduction; (2) determine if factors that influence reproduction influence the distribution and abundance of …
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Analyzing the diet composition of Lake Trout (Salvelinus namaycush) in Upper Priest Lake
<p>Lake Trout (Salvelinus namaycush) were intentionally introduced to the Priest Lake system in 1925 with the intentions of creating a recreational fishery. As the Lake Trout population increased within this system, the native Bull Trout (Salvelinus confluentus) population began to decline. …
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WHAT PREDICTS TERRESTRIAL INVERTEBRATE SUBSIDY USE BY BROOK TROUT (SALVELINUS FONTINALIS) IN HEADWATER STREAMS?
… for trout, including eastern brook trout (Salvelinus fontinalis), we have limited understanding of what causes input and use of these subsidies to vary among streams. Among the watershed characteristics that may influence input and use of terrestrial invertebrates, I predicted that forest …
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WHAT PREDICTS TERRESTRIAL INVERTEBRATE SUBSIDY USE BY BROOK TROUT (SALVELINUS FONTINALIS) IN HEADWATER STREAMS?
… for trout, including eastern brook trout (Salvelinus fontinalis), we have limited understanding of what causes input and use of these subsidies to vary among streams. Among the watershed characteristics that may influence input and use of terrestrial invertebrates, I predicted that forest …
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EFFECTS OF THERMAL STRESS ON SURVIVORSHIP OF BROOK TROUT (SALVELINUS FONTINALIS) IN ADIRONDACK LAKES
Brook trout (Salvelinus fontinalis) are common in waters ranging from the Appalachian Mountains to the Arctic Circle. These popular, coldwater sport fish face an uncertain fate in light of several climate change scenarios. Assessing the potential influence of variable temperature on brook trout …
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Modeling Water Temperatures and Brook Trout (Salvelinus fontinalis) Growth Potential Within a Complex Appalachian Riverscape
Climate change is expected to cause air temperatures to increase 2-5°C in the Appalachians throughout the 21st century. These air temperature increases will cause water temperatures to increase, and may negatively effect cold and cool water fish species. Brook trout are an important game fish …
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INDIVIDUAL VARIATION IN WINTER BROOK TROUT (SALVELINUS FONTINALIS) MOVEMENT IN A SMALL NORTHERN MICHIGAN STREAM
… and limited food availability. Brook trout (Salvelinus fontinalis) survival in winter is dependent on several factors including their condition after spawning in the fall and possibly their behavior in winter. Ice that forms during winter can potentially aid in survival by decreasing …
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Effect of population density on diel activity and growth in stream-dwelling Arctic charr Salvelinus alpinus
… attention. I used juvenile (age 1+) Arctic charr Salvelinus alpinus as a model species to test the prediction that individuals at high population density will increase their activity rate and distribute their feeding activity over a greater portion of the 24 h cycle. Individually-tagged fish were …
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Factors influencing brook trout (Salvelinus fontinalis ) abundance in forested headwater streams with emphasis on fine sediment
… importance of fine sediment on wild brook trout (Salvelinus fontinalis) population size was assessed. Brook trout production in headwater streams was inversely proportional to substrate permeability in one of two years, suggesting substrate composition influenced production. Results suggest the …
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Local and regional controls of brook trout (Salvelinus fontinalis) metapopulation dynamics within a complex Appalachian riverscape
Brook trout have recently become a species of conservation focus due to their unique spatial structure and restricted thermal requirements. These life history characteristics make brook trout particularly vulnerable to major biodiversity threats, such as climate change and habitat loss. For …
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Population ecology of landlocked Arctic charr, <i>Salvelinus alpinus L</i>., in the Canadian High Arctic
… Four landlocked populations of Arctic charr, <i>Salvelinus alpinus</i> L., were surveyed at 81 oN, close to the northerly extreme of the species range. They were single-species populations consisting of two distinct size modes, "Dwarf" and "Normal" charr, but with major differences both in size …
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An investigation of the factors affecting mercury accumulation in lake trout, Salvelinus namaycush, in northern Canada
… elevated mercury concentrations in lake trout (Salvelinus namaycush), a predatory aquatic fish species in some lakes in northwestern Canada. High mercury concentrations in lake trout in other regions have been associated with the biological features of the fish and various chemical and physical …
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Effects of annual thermal regime on growth trajectories of native age-0 brook trout (Salvelinus Fontinalis)
… novel threat to populations of brook trout (<em>Salvelinus fontinalis</em>), and much uncertainty remains about the potential of these populations to acclimate, adapt, or compensate for such changes. Brook trout are considered stenothermal, with a thermal preference of 14°C to 18°C, and a …
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