Optimization - • streams not connected>> easier for...

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Optimization optimal foraging theory  - states that natural selection favors those most efficient foragers feed on prey that maximize energy return balance between looking for prey, hiding from predators might have genetic basis rather than learning (due to zebra finch behavior) territoriality  - keeping exclusive use of home range defense against intrusion by others can waste energy, expose oneself to predators balance between costs/benefits of defending territory habitat  - determined by resources, how well organism survives, amount of competition 5 major zones - salt water (70%), terrestrial (29%), freshwater, estuary (where freshwater meets saltwater), endoparisitic
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Unformatted text preview: • streams not connected >> easier for specialization >> more freshwater species than saltwater Justus Van Liebig - “Law of the Minimum” • plants need certain type/amount of nutrients • miss an essential part >> die Victor Shelford - principle of tolerance limits (maximum) • too much of something can also inhibit growth • growth occurs best under a certain range of conditions • factors will vary seasonally, geographically, throughout life • placed in area of stress >> some organisms increase fitness • generalist- have wide tolerance • spet - have narrow tolerance • hormesis - opposite effect in small doses than in high doses...
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