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Age-class interactions in Atlantic salmon and brown trout: Effects on habitat use and performance
(2010-05-06)This thesis investigates the underlying mechanisms and the density-regulatory effects of age-class interactions, using juvenile Atlantic salmon (Salmo salar L.) and brown trout (Salmo trutta L.) as study species. Field ... -
Alkali-containing aerosol particles-release during biomass combustion and ambient air concentrations
(2009-01-22)Air pollution in the form of particles has considerable influence on human health and climate. Atmospheric aerosol particles arise from direct emissions of particles and from the conversion of certain gases to particles ... -
Allometry and ecomorphology of Scandinavian raptors
(2006)Ända sedan Charles Darwin observerade de berömda finkarna på Galapagosöarna har zoologer arbetat med att försöka förstå hur olika arters form och funktion (functional morphology) kan förstås i ljuset av deras livsstil ... -
Biodiversity and genetic patterns in marine invertebrates
(2010-09-17)Abstract: Systematics based on genetic data has both confirmed and contradicted earlier, morphologically defined species and their relatedness. Morphology does not always correspond to genetic lineages, and this will ... -
Chronic stress and intestinal barrier function: Implications for infection and inflammation in intensive salmon aquaculture
(2009-10-09)Aquaculture is a fast growing food-producing sector worldwide. This has increased the awareness among the public as well as governments of the need to secure the welfare and health of farmed fish. Atlantic salmon is, in ... -
Control of bioluminescence. Operating the light switch in photophores from marine animals
(2009-02-02)Physiologically controlled photocytes, capable of producing bioluminescence, are a common feature in the ocean among animals ranging from cnidarians to fish. The aim of this thesis was to study and compare the nature of ... -
Ecological genetics of inbreeding, outbreeding and immunocompetence in Ranid frogs
(2008-11-21)Using artificial fertilization, I crossed frogs from different populations to evaluate fitness consequences for the offspring from an inbreeding-outbreeding perspective, and to evaluate quantitative genetic effects on ... -
Egg size evolution and paternal care in pipefishes.
(2010-08-30)In this thesis I explore how sexual selection, sexual conflicts, coevolution with parental care and an environmental selective agent (hypoxia) affect the evolution of different egg characteristics and embryo survival and ... -
Environmental influences on the behavioural ecology of juvenile salmonids – the importance of rearing density
(2010-01-10)Background and aims: Early environmental conditions are known to influence the phenotypic development of animals, including behavioural alterations. The overall aim of this thesis is to investigate the effects of density, ... -
Environmental, nutritional and endocrine regulation of metabolic processes in fish
(2011-11-18)Due to seasonal variations in temperature and food availability, fish in temperate regions should be able to make metabolic adjustments to ensure that enough energy is available for the maintenance of basal processes. ... -
Evolution of annelid diversity at whale-falls and other marine ephemeral habitats
(2009-09-03)When whales die and sink to the sea-floor, they provide a sudden, enormous food supply to organisms in the vicinity. At first, larger mobile scavengers remove the flesh, but also when only the bones remain, the whale-fall ... -
From Proteomic Analysis to Biomarker Application - Studies of Carbonyl Reductase in Fish
(2011-09-22)Many anthropogenic substances are present in the aquatic environment, but there is limited information on how this combination of chemicals affects exposed wildlife. To assess the impact of chemicals, a biomarker approach ... -
Growth hormone and somatolactin function during sexual maturation of female Atlantic salmon
(2008-10-31)Background and aims: The growth hormone-insulin-like growth factor I (GH-IGF-I) system is known to act during sexual maturation of female salmonids, but the specific roles are not known. Somatolactin (SL) is a pituitary ... -
Haematopoietic and proteomic responses to wounding stress in the common sea star Asterias rubens
(2008-10-01)Dissertation Abstract Holm, Kristina (2008). Haematopoietic and proteomic responses to wounding stress in the common sea star Asterias rubens. Department of Zoology, University of Gothenburg, Sweden Many species of ... -
Individual variation in behaviour: personality and performance of brown trout in the wild
(2010-05-07)Individuals from the same population often show very different behaviour. These differences, when consistent across time, are referred to as animal personality or behavioural syndromes. Explaining the occurrence of animal ... -
Infidelity in Birds – Causes and Consequences of Extra-pair Paternity
(2012-04-13)Forty years ago, more than 90% of bird species were classified as monogamous and not very exciting systems for studies of e.g. sexual selection. Since then, the discovery of extra-pair paternity (EPP) in more than 75% ... -
The intestinal epithelium of salmonids : transepithelial transport, barrier function and bacterial interactions
(2006)The salmonid intestinal epithelium is important for growth and health of the fish. The epithelium is exposed to a multitude of internal and external factors that can influence its function. During the parr-smolt transformation ... -
Melanosome transfer, photoreception and toxicity assays in melanophores
(2009-10-02)Many animals such as fish and frogs have developed the ability to change colour of their skin to adapt to the environment or to signal to other individuals. This ability is due to specialised skin cells called melanophores. ... -
Morphological antipredator adaptations in water fleas
(2009-10-19)Some Bosmina and Daphnia species have the ability to develop extreme morphological antipredator defences, such as long antennules, high carapaces and helmets. The relative sizes of these plastic traits may differ substantially ... -
New Insights into the Evolution of Bryozoa- An Integrative Approach
(2011-02-17)Bryozoa is a group of aquatic, sessile invertebrates with circumglobal distribution and includes about 6000 recent species. Bryozoans have an indirect life cycle with a larval stage that settles and metamorphoses into the ...