Three Reasons for Travel Migration Orientation Navigation moving to and from a location knowing where you are based on land features/envi ronment knowing/ planning how to get to a place based on land/environm ent
Feb 22, 2016
Three Reasons for TravelMigration Orientation Navigation
moving to and from a location
knowing where you are based on land features/environment
knowing/planning how to get to a place based on land/environment
MIGRATION
• DEFINITION: Animals move to leave and come back to an ecosystem
• Example: Birds fly to warmer climates and know to come back by a certain time frame.
MIGRATIONS “TAXIS”LIVING ORGANISMS USE SENSES/ADAPTATIONS TO MOVE
LIVING THINGS MOVE BECAUSE OF ITS ENVIRONMENT
Senses:*odor- skunks, flowers taste- monarch *taste- monarch butterfly *touch-humans, snakes *hear- birds, humans*see- humans, etc. *smell- dogs, cats, humans
Environmental Influence:* currents- air or water* force of gravity*level of humidity *sun*weather/climate
MIGRATION MOVEMENTPOSITIVE MOVE or “TAXIS” Definition: A stimulus that causes a living
organism to move toward it
Example:A lizard moves toward the sun for warmth
MIGRATION MOVEMENTNEGATIVE MOVE OR “TAXIS” Definition: A stimulus that causes a living
organism to move away from it
Example: a snail moves away from the sun to keep moist
ORIENTATION
• Definition: Knowing where you are based on location of abiotic and biotic factors
• Example: The sun rise or sun set allows birds to direct flight.
• • Example: Dogs can orient based on smell of
stimulus (person/other dogs)
ORIENTATIONHOMING: returning to an area based on land marks/resources
Example: Monarch Butterfly
After mating, monarchs fly South to rest in a group
After birth they fly North to eat, mate, and lay eggs on milkweed (midwest)
NAVIGATION
• Definition: Knowing your position and planning a route to follow
• Example: Birds use stars and the sun to map a route to and from places
NAVIGATIONGeophysical: using land/physical features to plan a route
Turtles: use ocean currents to travel
More Navigation
ECHOLOCATION: using sound vibrations to locate