http://www.nature.com/scitable/knowledge/library/semelparity-and-iteroparity-13260334
In class we talked about the differences between semelparous and iteroparous life histories. Read the article Semelparity and Iteroparityand answer the questions that follow.
(1) Since evolution tends to maximize total reproductive output during the lifetime of a species, how could programmed death after the initial reproductive event ever be favored? Hint: see Figure 3, schematic of demographic model.
(2) Bet-hedging models predict that evolution should favor iteroparity when adult survival is highly variable. Why? Is such a model supported by available evidence? Explain with an example.
(3) What is meant by a species âapproachingâ semelparity?
(4) Are grain crops mostly semelparous or iteroparous? Why?
http://www.nature.com/scitable/knowledge/library/semelparity-and-iteroparity-13260334
In class we talked about the differences between semelparous and iteroparous life histories. Read the article Semelparity and Iteroparityand answer the questions that follow.
(1) Since evolution tends to maximize total reproductive output during the lifetime of a species, how could programmed death after the initial reproductive event ever be favored? Hint: see Figure 3, schematic of demographic model.
(2) Bet-hedging models predict that evolution should favor iteroparity when adult survival is highly variable. Why? Is such a model supported by available evidence? Explain with an example.
(3) What is meant by a species âapproachingâ semelparity?
(4) Are grain crops mostly semelparous or iteroparous? Why?
