Blar i Department of Biological Sciences på emneord "751599"
Viser treff 21-30 av 30
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Phenotypic plasticity in Atlantic herring (Clupea harengus) juveniles reared at two different salinities
(Master thesis, 2015-06-01)A common garden experiment with juvenile herring (Clupea harengus L.) was carried out to investigate the influence of salinity on different phenotypic traits commonly used to investigate population structure in this species. ... -
Phylogeography of Phycodrys rubens (Linnaeus) batters from mainland Norway and Svalbard based on nuclear and mtDNA sequences and microsatellites
(Master thesis, 2014-04-01)Phycodrys rubens is a common cold temperate red macroalga in the North Atlantic, a region with a diverse natural history that has shaped the phylogeography for many species. In this study microsatellite loci as well as ... -
Quantification and localization of StAR expression in Atlantic cod ovaries
(Master thesis, 2009-06-02)Steroidogenesis is essential for the production of sex steroids, and therefore also the sexual maturation process. The rate-limiting step in steroidogenesis is the movement of cholesterol from the outer to the inner ... -
Schooling dynamics of summertime migrating Northeast Atlantic mackerel (Scomber scombrus) in the Norwegian Sea using multibeam sonar
(Master thesis, 2013-05-31)Pelagic fish in the Norwegian Sea perform seasonal migrations from overwintering, via spawning, to feeding grounds. Northeast Atlantic (NEA) mackerel (Scomber scombrus) are highly migratory, fast- swimming, and an obligate ... -
Shelter seeking and competitive behavior in hatchery reared juvenile European lobster (Homarus gammarus) exposed to predator odors
(Master thesis, 2012-07-01)Releases of hatchery reared juvenile European lobster have been performed throughout Europe since the 19th century. However, poor survival in the wild reduces the success of both stock enhancement programs and large-scale ... -
Spawning, settlement and growth of Ciona intestinalis in Øygarden, Hardangerfjorden and Kvitsøy
(Master thesis, 2015-04-24)Due to the increasing aquaculture industry, new resources for feed should be assessed. A high protein content in Ciona intestinalis have increased the interest to farm C. intestinalis, and use as a feed resource. In addition, ... -
The systematics of Cephalaspidea (Mollusca: gastropods) revisited, with a study on the diversity of deep sea Philinidae sensu lato from the West Pacific
(Master thesis, 2013-11-26)The Cephalaspidea are the second most diverse marine clade of the Euthyneura gastropods, after the Nudipleura with many groups still known largely from shells or little anatomical data. These marine snails occur worldwide ... -
Taxonomic overview of calcareous sponges (Porifera, Calcarea) in the Jan Mayen vent field at the Mohn Ridge
(Master thesis, 2013-12-17)The Porifera is a very old group of organisms that has been dated back to more than 500 million years. They are important to marine benthic communities by providing protection, contributing to nutrient recycling and working ... -
Triploid induction in Atlantic cod (Gadus morhua L.) by the use of different pressure levels
(Master thesis, 2011-10-31)In the present experiment, different levels of pressure were investigated to see if it was possible to induce triploidy at a lower pressure level than previously used for Atlantic cod (Gadus morhua). Newly fertilized eggs ... -
Triploidisering av Atlantisk torsk (Gadus morhua); effekt av varierende hydrostatisk trykk og trykktidspunkt på triploiditet, samt konsekvenser for utvikling.
(Master thesis, 2013-10-31)Flere av utfordringene i norsk torskeoppdrett, er direkte eller delvis knyttet opp mot fiskens kjønnsmodningsfase. Kjønnsmodning fører blant annet til redusert appetitt og vekt, dårligere filetkvalitet samt høyere dødelighet. ...