BIOCHEM 2B03 Lecture Notes - Lecture 10: Pesticide Poisoning, The Leaves
9 Sep 2013
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Ethologists who study antipredator tactics focus on tradeoffs more than on any specific behaviour. Eg/ video turtles after hatching; large amount of predation risk. Think of the value of fighting behaviour. The central challenge for most animals staying alive; want to grow to the age and size that they can reproduce. Eg/ squid ejects ink that can distract predator enough that they cannot rely on split-second instinct; ink also serves as a chemical cue that alarms other squids in proximity. Graphs: right after exposure to predator. Eg/ ground squirrel group upon, mob, bite harass, yell, shove dirt, throw sticks at snakes to alarm other squirrels; snakes tend to rely on being sneaky. Squirrels physiology is well adapted to fighting a snake; snakes have venom. Serum-to-venom binding levels (antidote to being bitten by snake: measure of immunological defense against snake bites, rapid rise until 30 days of age, corresponds to leaving their burrows.
