Foraging Behavior - Animal Behavior - Lecture Slides, Slides of Zoology

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FORAGING

BEHAVIOR

CATEGORIES & MODES of feeding

Carnivory

Filter

feeding*

Pursuit Ambush

active wait

strike

Fluid

feeding*

Social

hunting

Deception

Herbivory

Filter

feeding*

gnawing fluid

feeding*

browsing

grazing

Carrion

Eaters

Baleen Whales Food Particles ( krill )

Function of Stabilimentum? (made with uv

reflecting silk) ½ of each web was monitored for prey Docsity.com

Osprey and their communication of food location ‐ osprey live in large colonies ‐ display prey when returning to the colony ‐ catch both solitary & schooling fish SOCIAL Animals: COMMUNICATION ABOUT FOOD flounder Smelt

Reproductive Provisioners (paralyzed) Nectar Feeder for self Foraging for offspring Foraging on something else for self e.g. organ pipe mud dauber Predator for Offspring

OPTIMAL

FORAGING

THEORY

Animals behave as if making decisions PREDATOR EXAMPLE: ‐ what prey species to eat ‐ what prey size to eat ‐ where to find them ‐ how to efficiently obtain them

Barn Owls: Prey “available” …… Prey captured Pellet Data Trapping Data

Economics Demand Curves for humans Demand for coffee is inelastic Docsity.com

Optimal Foraging requires identifying a currency i.e., what is being optimized? Common currencies: salts trace element water ENERGY Specifically … net rate of energy intake

QUESTION

Is

I

(Ingestion)

greater

for

large

animals??

ANSWER

It

depends

per

week

TIME BUDGETS Food is Abundant Food is Scarce

All

flowers

are

not

equal

to

bees