BIOB51H3 Lecture Notes - Lecture 18: Sapelo Island, Sexy Son Hypothesis, Life History Theory
12 Apr 2020
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Evolution of life history and parental care: chapter 12. What indirect benefit do females gain by choosing showy males according to the good genes hypothesis? c. ) showy ornaments may indicate that males have high-quality genes that may benefit offspring. Life history strategies vary widely among different species. Trade-off between reproduction and growth/survival: similar to guppies, it is seen in anoles. Key concepts: trade-offs arise when investment in one trait results in lower investment in another traits. Investment in reproduction is often at the expense of investment in growth or maintenance: selection may favour mutation that are beneficial early in life, even if they deleterious later in life. Investment in early reproduction often reduces reproduction late in life: changes in the environment (ex. Sapello island) can bring about rapid evolution of life history. Female lay their eggs in males and abandons them, females are free to seek mates, females fight, are larger.
