Else J Fjerdingstad

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BACKGROUND Considerable attention has focused on how selection on dispersal and other core life-history strategies (reproductive effort, survival ability, colonization capacity) may lead to so-called dispersal syndromes. Studies on genetic variation in these syndromes within species could importantly increase our understanding of their evolution, by(More)
BACKGROUND The evolution of social cooperation is favored by aggregative behavior to facilitate stable social structure and proximity among kin. High dispersal rates reduce group stability and kin cohesion, so it is generally assumed that there is a fundamental trade-off between cooperation and dispersal. However, empirical tests of this relationship are(More)
Genetic diversity benefits for social insect colonies headed by polyandrous queens have received intense attention, whereas sexual selection remains little explored. Yet mates of the same queen may engage in sperm competition over the siring of offspring, and this could confer benefits on queens if the most successful sire in each colony (the majority sire)(More)
Goldfish were exposed to euflavine in doses of 7-100 mg/l for 1h-14 days. The treatment resulted in a reduced stainability of the brain with the Timm histochemical procedure for "heavy metals". In contrast, analysis by flameless atomic absorption spectrophotometry showed no significant changes in the concentrations of zinc and of copper after euflavine(More)
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