BIOL 2001 Lecture Notes - Lecture 11: Mastigias, Instinct, Aerophagia
Document Summary
The mouthless jellyfish- mastigias paupua migrates upward in the water column during the day, and descends at night. They also migrate from the west side of lagoons to the east side during the day, and return during the night. Taxis (pl. taxes) the movement of an organism caused by outside stimulus, such as a reflex or instinct, it"s an innate behavioural response. **innate behaviour can be replaced by learned behaviour and hybridized*: primates with tools, lovebirds with nesting materials. A sequence of innate behaviors that are essentially unchangeable and mostly conducted to completion once it is started. Triggered by a sensory environmental stimulus called a sign stimulus: ex. Mating dance of birds, honeybee dance, sea turtle hatchlings, leaf transport in leaf cutter ants, geese recover their eggs. Behaviours modified by experience or taught: rely on memory, have a learning curve; behaviour improves with practice, many learned behaviours have strongly pre-determined chronology (ex.
