E.3b Learned Behavior
23/02/2014 § Leave a comment
one day i’ll be a good student
that day is not today
Didn’t I define “learned behaviour” last time?
DBQ page 238:
1. The first sonogram’s frequency is more stable and flat compared to the second sonogram. In the second sonogram, there is a long period of heavily fluctuating frequency compared to the short period of heavy fluctuation in the first sonogram towards the end of its song.
- a) The third sonogram’s pitch fluctuates less than the first two sonograms. The amplitude of the third sonogram is much thicker, meaning that the third song is louder than the other two songs.
- b) The song is both innate and learned. All of the white-bird sparrow populations will sing the same, if not a similar pattern as their song, which makes the song innate in the species. At the same time, there were some songs that were different, namely in the third sonogram with a different environment.
- a) Sonogram V holds similarities to the beginning portions of the first three sonograms. Sonogram V’s pitch fluctuations are more similar to those of sonogram IV, particularly in how they both slope downwards. By contrast, sonogram V has higher fluctuations than sonogram IV.
- b) The initial section of sonogram V is similar to the initial sections of sonogram I and II, where the song flatlines at a single pitch.
- c) Birds would normally stick to their own birdsong to stay safe within their own species. Unless they need to attract other species, which they don’t, birds use their songs to attract potential mates from their own species. They don’t sing other songs for fear of attracting competition and predators.
- d) These observations are evidence of learned development in birdsongs. Species are able to put aside its innate behaviour and learn something new based on environmental influences.