BIO320H5 Lecture Notes - Lecture 11: Animal Echolocation, Human Echolocation, Shrew
Document Summary
Self-communication: one individual= both sender and receiver: example of self communication: biosonar (echolocation) Produce auditory signal to the product of receiver. Unexploited communication channels: lots of ambient noise below 20khz. Nocturnal vs. diurnal lifestyle: so(cid:373)e (cid:272)a(cid:374)"t see at (cid:374)ight. Organism natural environment: ca(cid:374)"t see u(cid:374)de(cid:396)g(cid:396)ou(cid:374)d, u(cid:374)de(cid:396)(cid:449)ate(cid:396), et(cid:272). Main reason: uncertain lighting condition foraging strategy. Navigation, orientation, gather information about the environment. Know what is around them and how they themselves fit into that. Blind human show more activity in visual area than non-blind human. There are also differences in protein level. There is a protein called prestin and it is found near hair cells of the cochlea: scientist have decided what it is used for is high sensitive/frequency hearing. Do(cid:374)"t o(cid:374)l(cid:455) use e(cid:272)holo(cid:272)atio(cid:374) fo(cid:396) (cid:374)a(cid:448)igatio(cid:374) a(cid:374)d u(cid:374)(cid:272)e(cid:396)tai(cid:374) light (cid:271)la(cid:374)k (cid:271)ut also ha(cid:448)e a(cid:374)othe(cid:396) purpose which is tracking, echolocation for prey pursuit. *bats are divided into two groups: larynx vs. tongue clicks.
