Sökning: "egg production"
Visar resultat 6 - 10 av 60 avhandlingar innehållade orden egg production.
6. Non-indigenous zooplankton : the role of predatory cladocerans and of copepods in trophic dynamics
Sammanfattning : Human-mediated introductions of non-indigenous species now threaten to homogenize the biota of the Globe, causing huge economic and ecological damage. This thesis studies the ecological role of 3 invasive planktonic crustaceans, the omnivorous copepod Acartia tonsa (western Atlantic and Indo-Pacific) and the predatory cladocerans, Cercopagis pengoi (Ponto-Caspian) and Bythotrephes longimanus (Eurasian). LÄS MER
7. Levels of brominated flame retardants in humans and their environment : occupational and home exposure
Sammanfattning : Plasma from workers at an electronic dismantling plant were analysed for tri- to heptaBDEs (brominated diphenyl ethers), during 18 months. The different exposed groups showed concentrations ranging from 0.06to 2.8 ng g-1 (l. LÄS MER
8. Non-invasive Antibody Production in the Chicken
Sammanfattning : The production of antibodies for analytical purposes using invasive procedures on small mammals is common practice in biomedical research. The aim of this study was to develop an efficient method for non-invasive antibody production in the chicken. LÄS MER
9. Reproductive pattern and offspring performance in brown trout (Salmo trutta)
Sammanfattning : This thesis deals with how reproductive traits and reproductive behaviour in femalebrown trout (Salmo trutta) are linked to offspring performance.In the small stream Tullviksbäcken, the choice of spawning sites was stronglyinfluenced by short-term fluctuations in stream flow and by substrate quality. LÄS MER
10. Cellular transport and secretion of the cyanobacterial neurotoxin BMAA into milk and egg : Implications for developmental neurotoxicity
Sammanfattning : The cyanobacterial amino acid β-N-methylamino-L-alanine (BMAA) is a neurotoxin implicated in the etiology of neurodegenerative diseases. Cyanobacteria are cosmopolitan organisms present in various environments. LÄS MER