BIO205H5 Lecture Notes - Lecture 4: Atlantic Salmon, Henry David Thoreau, Walden Pond
Document Summary
Everything"s a trade off - once humans can walk upright, they can"t wiggle ears. Tree-frog eggs - usually take time to hatch, but when snake came, one egg hatched early. Predation can have very immediate effect on life history. Hatching earlier could cause lower survival rate. Low development or early development can be a consequence. Henry david thoreau - wrote about nature. Lived for one year in walden pond, near concord, massachusetts in a cabin. Every year looked at which flowers were producing more flowers and on what day. After his death - people started following what he was doing. Plants respond to environmental changes with alteration of life history traits. Data observed flowering of certain species over a number of years. Flowers change life history strategy in relation to abiotic factor (temperature) Parental investment - high environmental equality means reproductive success anyway so parental investment should be low since offspring can.
