Term
| why aren't animals perfect? |
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Definition
1. natural selection does not require it
2. there are trade offs to everything
ie. giraffes height vs drinking, cheetahs speed vs rest, offspring # vs parental care |
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Term
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Definition
to produce the largest number of SUCCESSFUL offspring
-must divide energy between growth, reproduction, # of offspring, and parental care |
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Term
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Definition
1. age at first reproduction - waiting and growing first means increased fecundity
2. how often to breed - semelparous vs iteroparous
3. how many offspring per episode |
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Term
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Definition
-annual
-devote more energy to growth
-more offspring
-less parental care
ie. salmon |
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Term
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Definition
-perennial
-devote less energy to growth
-less offspring
-more parental care
ie. deer |
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Term
| probability of adult survival/prob. of juvenile survival |
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Definition
low = semelparous
high = iteroparous |
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Term
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Definition
r = J curve, weedy or colonists organisms
small, short lives, type III, early breeding, semelparous, large clutch size, little parental care
k = S curve, better competitors
large, long life, late breeding, type I, iteroparous, small clutch size, lots of parental care |
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