Browsing Doctoral Theses / Doktorsavhandlingar Zoologiska institutionen by Issue Date
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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 ... -
Oxidative Damage in Fish Used as Biomarkers in Field and Laboratory Studies
(2008)Many toxic xenobiotics entering into the aquatic environment exert their effects through redox cycling. Oxidative stress, incorporating both antioxidant defences as well as oxidative damage, is a common effect in organisms ... -
Relationships between nomenclature, phylogenetics and systematics
(2008-09-01)Systematists have become increasingly aware of the limits imposed by the current system of nomenclature for accurately representing evolutionary relationships and managing efficiently names associated with clades. In ... -
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 ... -
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 ... -
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 ... -
Predation and shorebirds: predation management, habitat effects and public opinions
(2009-01-09)Many shorebird populations are rapidly declining and a high nest predation rate is one of the threats facing these populations. Thus, factors that affect predation and how to manage it in an effective way are receiving ... -
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 ... -
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 ... -
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 ... -
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. ... -
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 ... -
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 ... -
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, ... -
Systematics of Grania (Clitellata: Enchytraeidae), an interstitial annelid taxon
(2010-02-12)In between the grains of sand on the ocean floor, there exists a world which few people are aware of. Representatives of almost all animal phyla can be found here. The clitellate family Enchytraeidae is in the marine ... -
Phylogeny and Signal Diversity in Widowbirds and Bishops (Euplectes spp.)
(2010-02-19)Although sexual selection for elaborate signals is well documented in numerous species, the extreme diversity in signal design and expression in many taxa is largely unexplained. This thesis explores phylogenetic, mechanistic ... -
Studies of fish responses to the antifoulant medetomidine
(2010-03-31)ABSTRACT Growth of marine organisms, fouling, on man-made constructions submerged in the water is regarded as a major problem. For vessels, fouling increases drag and thereby fuel consumption, wherefore antifouling ... -
Taxonomy and phylogeny of polychaetes
(2010-05-03)Polychaetes are a large group of segmented worms that display an enormous morphological diversity. Molecular data has shown in recent years that groups previously thought to be separate from polychaetes are actually part ... -
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 ... -
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 ...