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Showing 1 to 15 of 15 for “"salvelinus alpinus"”.
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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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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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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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Effects of prey distribution on resource defense, foraging behavior, and growth in stream-dwelling Arctic char (Salvelinus alpinus)
… I conducted a field experiment on Arctic char Salvelinus alpinus in a small Icelandic stream to test different spatial distributions of drifting invertebrate prey. Specifically, ninety-six individually-tagged juvenile Arctic char, placed in twelve stream enclosures for one month, were subjected …
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Effects of environmental enrichment on personality traits in juvenile Arctic charr (Salvelinus alpinus) : interplay with brain morphology, growth performance and implication for welfare
Arctic charr (Salvelinus alpinus) is the northernmost distributed freshwater fish and considered to be the most cold-adapted salmonid. In overall, Iceland is graded as the largest worldwide producer and its system considered as sustainable farmed system. Despite that, no study has yet targeted the …
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À l'omble de l'hypoxie : la réponse à différents niveaux d'intégration de l'omble chevalier (Salvelinus alpinus) face à l'hypoxie cyclique
… poissons sensibles, tels que l’omble chevalier (Salvelinus alpinus). Mots clés: Salvelinus alpinus, hypoxie, réoxygénation, métabolisme, phénotype, acclimatation, plasticité "--Résumé
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Sea lice infestation on wild salmonids in the southern part of the Icelandic Westfjords
… sjóbirtings (Salmo trutta) og sjóbleikju (Salvelinus alpinus), kannað í öllum fjörðum sunnanverðra Vestfjarða frá júní til september 2017 og niðurstöður bornar saman við lúsatalningar í kvíum á svæðinu, sem og fyrri athuganir á villtum laxfiskum. Niðurstöður sýna aukið smit villtra laxfiska …
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Entre fiabilité et simplicité : quand la commodité des biomarqueurs compromet leur utilisation en physiologie comparée
… rouge et le foie de l’omble chevalier (Salvelinus alpinus). Pour induire des variations mitochondriales, chaque espèce a été acclimatée à deux températures. L’ensemble des mesures a été effectué selon diverses techniques scientifiques, dont la spectrophotométrie, l’immunobuvardage de …
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Aldur og vöxtur sjóbleikjustofns Hvítár í Borgarfirði
Bleikja Salvelinus alpinus telst til ferskvatnsfiska og er ein af þremur villtum laxfiskum sem finnast hér á landi. Göngur eru algengar hjá bleikju og bleikja sem gengur í sjó kallast sjóbleikja. Sjóbleikja í Hvítá í Borgarfirði hefur flókinn lífsferil. Hún gengur til sjávar í Borgarfjörð, hefur …
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Arctic Char Otolith Records of Recent Limnological Change in High Arctic Lakes
… in these environments such as Arctic Char (Salvelinus alpinus) which represent the top predatory fish in Arctic lakes. Otoliths, the inner ear bones of fish, offer a method to monitor these impacts through chemical analysis of their annual rings. However, not only are long-term limnological …
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Aspects of the conservation biology of Coregonus lavaretus in Britain
… that vary between sites such as Arctic charr (Salvelinus alpinus) and brown trout.
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Ante- and post-mortem factors affect muscle protein functionality from fish
… ante-mortem handling stress, Arctic charr, Salvelinus alpinus, hatched at 6.5 and 9.5°C and categorized as large, medium, and small when 6-m old, were assigned to four handling stress treatments: (1) processing with no stress; (2) processing immediately after stress; (3) processing 24 h …