Sökning: "Behaviour"
Visar resultat 16 - 20 av 4952 avhandlingar innehållade ordet Behaviour.
16. Migratory behaviour of Baltic salmon (Salmo salar L.) : adaptive significance of annual cycles
Sammanfattning : This thesis evaluates the adaptive significance of annual cycles on the migratory behaviour of Baltic salmon (Salmo salar L.). The studies have included field experiments as well as laboratory studies gf maturity and migratory behaviour patterns of smolts and postsmolts mainly from the Angerman river population. LÄS MER
17. Pheromonal Mediated Behaviour and Endocrine Responses in Salmonids : The impact of Cypermethrin, Copper, and Glyphosate
Sammanfattning : The effects of cypermethrin, copper and glyphosate on the endocrine system and subsequent response to female pheromones were investigated in mature male brown trout (Salmo trutta) parr. Responses measured were the amount of strippable milt, blood plasma levels of both an androgen (11-ketotestosterone (11-KT)) and a progestin (17α,20β-dihydroxy-4-pregnen-3-one (17,20b-P)), and behavioural changes. LÄS MER
18. Genomics and Transcriptomics of Behaviour and Plumage Colouration
Sammanfattning : The aim throughout this thesis has been to investigate the underlying genetics of behaviours and feather colour and plumage patterns by using chickens as a model organism. Chickens are extremely important as a food source, both in terms of egg, as well as meat production. LÄS MER
19. Neuromolecular and behavioural profile of teleosts : - effects of boldness, agonistic behaviour and reproductive status
Sammanfattning : This thesis investigates if boldness is reflected in the function of brain histaminergic system in zebrafish (Danio rerio). Moreover, behavioural differences in AB line, spiegeldanio (spd) line and wild caught strain of zebrafish have also been explored apart from the winner-loser effect in AB and spd fish. LÄS MER
20. Male moth behaviour and perception in pheromone plumes
Sammanfattning : Behaviour of male moths and electrophysiological responses of male pheromone-specific olfactory receptor neurones were studied in two model species, the oriental fruit moth Grapholita molesta and the turnip moth Agrotis segetum. The studies were aimed at elucidating the relative importance of different mating disruption mechanisms. LÄS MER