AP Bio: Animal Behavior
Terms in this set (...)
Behavior is everything an animal does and how it does it in response to an internal or external stimulus
What are animal behaviors vital to?
Reproduction, natural selection, and survival
What chemical signals an animal behavior?
Epinephrine--circulates through body initiating fight of flight
Examples of this human behavior?
Shivering and sweating
How do organisms respond to their environment?
In behavioral and physiological mechanisms
Example of organisms responding to environment?
Migration of monarch butterflies
What are the two types of behaviors?
Innate or learned
What does this mean for the species?
Behavior that is genetically fixed
Same in all members of the species
Why is innate behavior important?
1. May be no opportunities to learn
2. Mistakes can lose life--avoiding predators
3. Potential mates must be identified
Example of innate behavior?
3 Major examples?
Fly emerge from pupation and mate right away--know to do so because they die quickly
Hibernation, Migration, Reproduction
Complex innate behavior
Migration is one
Fixed Action Patterns
Sequence of behaviors usually conducted to completion once started
What are Fixed Action Patterns resistant to?
Modification by learning
Releaser: simple stimulus that triggers a FAP
Example of FAP?
1. Female geese will always go after the egg in the same motion--even when the egg is too far away
2. Male Sticklebacks (fish) aggressive territoriality
How do we know innate behaviors exist?
Gene mutation and Deprivation experiments
Gene mutation (examples in flies)
per mutation: alters fly rhythm (cannot do courting dance properly)
fru mutation: results in the inability to discriminate between males and females
Raise organism in isolation
Example of deprivation
Monkeys preferred cloth mother over metal one despite lack of food---genetics knew it wanted fur comfort
Mutation inactivated a gene
Ability to learn is inherited, but the behavior develops during an organisms lifetime
4 Kinds of learning behaviors
Animals associate one stimulus with another
Example: salivating at the sight of food
What does this enable animals to do?
Response to stimulus decreased when it is repeated with no apparent effect
Disregard certain stimuli
Falling leaves lack response from birds
Trial and error
Voluntary behavior in future modified by consequences of past behavior
4 kinds of Operant conditioning?
Give something Good
ex: dog gets treat when he doesnt jump
Take away something Bad
ex: stop hitting dog when he doesnt jump
Give something bad
ex: hit dog when he jumps
Take away something good
ex: stop giving him attention when he jumps
Example of operant conditioning
Mouse learns to touch lever to get food
Nature and nurture do what?
Influence the behavior of organisms
What does natural selection favor in terms of behavior?
Favors innate and learned behavior that increases survival and fitness
Time an organism has the ability to learn a set of stimuli
Example of critical period?
First person geese see is their mother --- sees scientiest, follows him
Growth towards light with stem and leaves oriented towards max photosynthesis
Changes in the length of night regulate flowering and preparation for winter
What is the plant hormone that causes cells to lengthen?
What happens with auxin and the movement of sunlight?
Auxin moves away causing cells to get larger, stem bends toward light
Physical, mental, and behavioral changes that follow a roughly 24 hour cycle
What do circadian rhythms respond to?
light and darkness in an organisms environment
5 forms of social behaviors?
2. Agnostic behaviors
3. Dominance hierarchy
5. Altruistic behavior
organisms ability to exchange information--allows change in behavior
How do signals affect the behavior of other organisms?
Causing differential reproductive success
What animals use to indicate dominance, find food, establish territory, etc.
Types of signals
Visual Pros and cons
Pros: convey position and physicality of signaler
Cons: Requires light and must be looking at signaler
Example of visual
fireflies flashing light at night
Pros: can be in dark, travel far, receivers attention is not needed
Cons: does not convey complex info
bird song: male singing tells of sex and reproductive condition
Movement and touching
Example of tactile
Bee wiggle dance
Angle and duration of dance tells distance from food source
Animals send signals through water to determine info about environment or for communication
Example of electrical
Sharks have electroreceptors that are used to detect objects
Chemical signals (what is it)
Pheremones: chemical signals that stimulare a response from individual
Example of a pheremone
Territorial marking or
Substances make fish try to mate with area
How can communications influence behavior differently?
Some behaviors require multiple signals
Example: courtship in flies requires tactile, chemical, visual, and auditory
Threatening and submissive rituals
What are agnostic behaviors used for?
Mostly symbolic--no harm
Territoriality and competitor aggression
social ranking within a group
(Pecking order for chimps)
Working together in coordination
Cooperative behaviors effects on individual and population?
Individual: increase fitness
Population: increase survival
Example of cooperative behavior?
Pack of african dogs hunting wildebeest together
Positives of group living
1. Improved foraging (hunting in packs)
2. Protection and defense
3. Reduce risk of being prey (predator warnings)
4. Rich learning environment
Negatives of group living
1. Reduce amount of food
2. More competition
3. Higher rate of disease transmission
4. Interference with reproduction (infanticide due to hierarchy)
Reduces individual fitness, but increases the fitness of the recipient
Increasing the survival of close relatives, passes genes to next generation
Example of altruism
Belding squirrels make calls to alert population of a predator
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