BI 132 Lecture Notes - Lecture 8: Aggressive Mimicry, Mollusca, Evolutionary Arms Race
1 Nov 2018
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Document Summary
Eat or be eaten: animals do not always appear to be foraging optimally, trade-off between eating and safety, example: chacma baboons forage in areas with less abundant food and less predation risk. What size mollusk is optimal: they are randomly selected, large, medium, small. Hunting and aggressive mimicry: aggressive mimicry to attract/lure prey, blennys mimic cleaner wrasse, predatory fireflies mimic mating signal of other fireflies. The moths keep the sloths clean when they eat. Their fur becomes green because of their diet so the moths get rid of the color: sloth-moth relationship is mutualistic. 2: but relationship between predator and prey is an evolutionary arms race. Evolutionary arms race: poisonous newts produce ttx, some garter snakes have developed resistance to poison. In the news: effects of climate change on predator avoidance: reef fish exposed to seawater with high co2 concentrations, do not avoid the scent of predators, juveniles raised in high-co2 water show riskier behavior.
