BIO 415 Lecture Notes - Lecture 11: Cholera Toxin, Oceanic Dispersal, Crypsis
Document Summary
Cholera toxin inhibits regulation of secretion of electrolytes and water. Causes vomiting nausea water diarrhea and dehydration. Allows cholera to cross bridges and barriers. Post madagascar origin meaning they went from madagascar then around. Post gondwana africa origin means they originated in africa then went elsewhere. There are strong evidence for either ones of distribution. Colors changes their effect of absorbing heat. Used as an ability to avoid unfavorable microclimates. Will change to better adapt to temperatures. Helps with crypsis but not is the driving evolutionary force. Brightness related more to crypsis and thermoregulation while older lineages inclined to have dynamic color changes. Excess energy to be allocated to mate selection. Monogamous birds less colorful with more simplistic mating rituals. Monogamous birds eat mostly fruit while polygamous birds find more resources. Ancestor is a member of the family corvidae from australia.
