Doctoral Theses / Doktorsavhandlingar Zoologiska institutionen
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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% ... -
Tales of the flying earth: The effect of host flyways on the phylogeny of shorebird lice (Phthiraptera: Ischnocera)
(2012-04-05)On the wings, bodies, and heads of most birds there are lice. These lice spend their whole lives on their host, with the exception of the few lice that get the opportunity to transfer from one host to another, typically ... -
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. ... -
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 ... -
Systematics of Marionina (Annelida: Clitellata: Enchytraeidae)
(2011-04-25)This thesis is about species of segmented worms that previously were placed in the genus Marionina Michaelsen, 1890, within the family Enchytraeidae, class Clitellata and phylum Annelida. These species are closely related ... -
Paleolimnological reconstructions of fish population changes in acidified lakes
(2011-03-04)This thesis deals with the potential of using subfossil Chaoborus spp. and Daphnia spp. remains preserved in lake sediments to reveal past fish community alterations related to progressive acidification. Sediment cores ... -
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 ... -
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 ... -
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 ... -
On the regulation of Postprandial Gastrointestinal Blood Flow in Teleost Fish
(2010-05-20)Henrik Seth (2010) On the Regulation of Postprandial Gastrointestinal Blood Flow in Teleost Fish Department of Zoology/Zoophysiology, University of Gothenburg, Box 463, 405 30 Göteborg. The regulation of the cardiovascular ... -
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 ... -
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 ... -
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 ... -
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 ... -
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 ... -
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 ... -
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, ... -
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 ... -
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 ... -
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. ...
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