3.6 - feeing

3.6 - feeing - Antipredator tactics o Warning coloration...

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Antipredator tactics o Warning coloration – often combined with poison to indicate toxidity/ unpalabalbe o Playing dead – posing to be dead, predator loses interest ex. Hognose snake, oppossum o Feigning injury Distracting predators from nests/ young o Selfish her hypothesis place others between yourself and predator others are a living shield Tactic is to clump into groups Best to be in the middle – safety in numbers Penguins jumping into the sea to feed – first and last are more likely to be eaten by seals and killer whales o Dillusion hypothesis overwhelm predator consumption capacity Large numbers are easy to locate but inidividals are more difficult to capture Even though the group is more conspicusous to predators Acquiring resources Feeding resources – doing whatever it takes to get the energy to meet physiological and developmental needs o Locate (hunt, dig) o Obtain (capture, pick, uncover, gather) o Consume o Digest o Metabolize o Acquire the most energy with the least energy expenditure 3 types of feeding o Filter feeding – straining food from surrounding water, plankton, krill Has evolved sep in multiple aquatic animals Is an ancient feeding method Allows for massive body size bc its low energy, high yield, reliable availability, size helps (more you can filter) and doesn’t harm (hypothesized as one of the major reasons whales are so huge) o Plant eating – consuming plant matter for energy Cultivating (film) – manipulating the plant population such that better food sources are more readily aviliable and more easility acquired Leaf cutters use leave fragments to fertilize the fungus they eat o Hunting – manipulating and trapping prey items Traps – manipulating and controlling prey for more efficient consumption Humpback whales build bubble nets to concentrate/ confuse krill and fish
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Aggressive mimicry – predator get close to prey by appearing non treatening or using lures Snapping turtule has a toung growth that lures fish into its mouth Foraging specializations – sensory adaptations to detect and locate prey Snakes have heat sensing pits on snout to detect prey/ mice Nocturnal sand scorpion can detect vibrations of prey (spiders, locust etc), special sensors at the tips of their legs Ampullae of lorenzini (electroreceptors) on sharks to detect electric fields generated by action potentials in pretty o Anticrypsis tactics/ search image formation – predator learns to id cryptic prey
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3.6 - feeing - Antipredator tactics o Warning coloration...

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