ENGL121 Lecture Notes - Lecture 12: Seed, Eric Charnov, Disruptive Selection
3 Feb 2016
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Document Summary
The schedule of an organism"s life, when it"s born, it matures, how many offspring it has and when it dies. It will be limited due to our energy budget at every time, so there are tradeoffs. The tradeoffs can happen between growth and survival (main functions) or within those functions. The number of eggs that they produce is variable too: 50-400 eggs, and egg size also varies. If all this data is plotted, there"s a nice relation (a lot of scatter). As you produce more eggs, the size of these gets smaller. Beyond offspring size and number: gene flow, allows populations to maintain variation (adapt)- they can be under natural selection. The smaller larvae from smaller eggs tend to disperse more because of the competition at their home area. Number of seeds per plant vs. average seed mass. As the number of seeds increases the average seed mass decreases.
