BI308 Lecture Notes - Lecture 6: Ethyl Oleate, Selective Breeding, Greylag Goose
Document Summary
If colonies are artificially made up of only young workers some become foragers much sooner and others remain as nurse bees much longer. It may be social encounters that stimulate these changes. Lack of encounters with older foragers appears to hasten nurse bees transition to forager role. Inhibiting agent believed to be a chemical called ethyl oleate that foragers manufacture and store in their crop: when foragers transfer food to nurse bees they transfer the chemical, which slows the nurses transition to foragers. In honeybees, therefore, sequence of behavioural changes is determined by continuous interactions between genes and both chemical and social environments. Flour beetles: role of genes in affecting behaviour: artificial selection demonstrates role of genes, measured boldness in many individuals, shortest and longest duration of faking death used for breeding. Developmental programming" (or g x e : two genotypes of fish.
