Aposematic coloration. crypsis Effect of the moth (Cactoblastis cactorum) on prickly pear cactus...
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Transcript of Aposematic coloration. crypsis Effect of the moth (Cactoblastis cactorum) on prickly pear cactus...
Aposematic coloration
crypsis
Effect of the moth (Cactoblastis cactorum) on prickly pear cactus (Opuntia stricta)
before
after
White pine Red pine Jack pine White spruceWinter 1956-57 31 19 84 0Winter 1958-59 9 1 48 0Winter 1960-61 17 0 70 0
Percentage of various trees browsed by deerHorton 1964
Monarch butterfly
Viceroy butterfly
bumblebee
Cicada killer
Bald faced hornet
robberflyHummingbird moth Syrphid fly
Coral snake
milksnake
kingsnake
katydid
Phrynosoma cornutum
Horned lizard
Phyllodes imperiais
Fruit piercing moth
Walking stick
Daphnia and yeast
Yeast cells/ml
Feedingrate
Type 1 response
Here consumption islimited by searchtime
Here consumption islimited by handling time
Here consumption is limited by acombination of search and handling time
Consumptionrate
Food density
Type 2 response
1)
guppies were fed tubificid worms and fruit flies in varying proportions
Number expected (if nopreference)
Proportionof tubificidin diet
Proportion oftubificids available
Here guppies were feeding at the topof the tank
Here guppies startfeeding at bottomof tank
Type 3 response
2) water bugs fed mayflies in varying numbers
Numberexpected
Percentageof mayfliesin diet
Percentage ofmayflies available
Waterbug learns how to catch prey(becomes more successfu l)
Type 3 response
r
N
High harvest quota
Medium harvest quota
Low harvest quota
Nm