BIO-8 Lecture Notes - Lecture 3: Low Birth Weight, Oyster Farming, David Lack
Document Summary
Joseph yang: birds started to starve, decrease in seed abundantness, increase in hardness and size, as finches, were dying small died faster than larger birds, 1400 birds to 200 birds. Consistent relationship between birthweight and survival: low birth weight lungs and other systems are not fully developed, high birth weight babies: breeched birth. Safety in numbers: relative hatch date= mean date that hatching occurred. In this case, it is best to hatch when there are many others around: brood size larger if it happens at same time, pays to hatch when everyone else is hatch. Consistent relationship between hatch date and survival/reproduction. 3 tasty morphs of papilo dardanus: phenomena due to batesian mimicry (wallace studied it heavily) Na ve predator will never again anything that looks similar to toxic one: one exposure to stimulus is enough. Intermediate phenotypes are at a selective disadvantage because they don"t resemble the toxic or tasty morph closely.
