ENT207 Lecture Notes - Lecture 11: Interspecific Competition, Infertility, Pest Control
28 Apr 2016
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Insect can be univoltine (1 generation/yr) or multivoltine (> 1 generation/yr) d. i. ); if it does go through diapause then its univoltine (???) d. ii. Development strategies: r-strategist, high reproductive rate, low survival rate, k-strategist, low reproductive rate, high survival rate. Population change: nt= n0e(b-d)t-et +it e : 2. 7183. Insect life tables: used to track stage-specific mortality for pest management. R= intrinsic rate of increase r= number of daughters/number of mothers: r < 1 population decreasing, r = 1 population stable, r > 1 population increasing. A typical female of the bubble gum maggot lays 250 eggs. On average 32 of theses eggs are infertile and. Of the survivors, 64 die as larvae due to habitat destruction (removal of gum from under seats) and 87 die as pupae because the gum gets too hard. Construct a life table for this species and calculate r (assuming a 1:1 sex ratio). 96. 7 r = # of daughters/ # of mothers (1:1)
