innate behavior ch. 31. i. behavior a. define behavior 1. anything an animal does in response to a...

INNATE BEHAVIORINNATE BEHAVIOR

CH. 31CH. 31

I. BEHAVIORI. BEHAVIOR

A. Define A. Define BehaviorBehavior

1. Anything an animal does in 1. Anything an animal does in response to a stimulus.response to a stimulus.

a.Example: Heat a.Example: Heat stimulates a lizard to seek stimulates a lizard to seek shade.shade.

I. BEHAVIORI. BEHAVIOR

1. Behavior is adapative1. Behavior is adapativea. Animals can modify a. Animals can modify

their their behavior in order to behavior in order to help help them survivethem survive

b. Ex: Mother gull b. Ex: Mother gull incubates eggs while father incubates eggs while father gull hunts for the family gull hunts for the family foodfood

II. INHERITED BEHAVIORII. INHERITED BEHAVIORA. An animal’s genetic material A. An animal’s genetic material

(DNA) determines how it (DNA) determines how it responds to different stimuli.responds to different stimuli.

1. Inherited behavior evolves 1. Inherited behavior evolves as a result of natural selectionas a result of natural selection

a. Animals with favorable a. Animals with favorable traits survive and traits survive and

reproducereproduce

II. INHERITED BEHAVIORII. INHERITED BEHAVIOR

B. B. Innate BehaviorInnate Behavior- Inherited - Inherited behavior of animalsbehavior of animals

1. Born with behavior1. Born with behavior

2. Ex: Frog has insect 2. Ex: Frog has insect detectors. Whenever an detectors. Whenever an insect is detected the frogs insect is detected the frogs tongue is flipped outtongue is flipped out

II. INHERITED BEHAVIORII. INHERITED BEHAVIOR

a. a. Fixed-action patternFixed-action pattern- - unchanged behavior that unchanged behavior that continues until completedcontinues until completed

III. Automatic ResponsesIII. Automatic ResponsesA. Transparency/Paper DemoA. Transparency/Paper Demo

B. B. ReflexReflex- Simple, automatic - Simple, automatic response to a stimulus that response to a stimulus that involves no conscious involves no conscious controlcontrol

1. Simplest form of innate 1. Simplest form of innate behaviorbehavior

2. Protects against danger2. Protects against danger

III. Automatic ResponsesIII. Automatic Responses

C. C. Fight-Or-Flight ResponseFight-Or-Flight Response- A - A response that mobilizes the response that mobilizes the body for greater activitybody for greater activity

1. Either fight or run from 1. Either fight or run from dangerdanger

2. Controlled by hormones 2. Controlled by hormones causes heart rate to increasecauses heart rate to increase

IV. INSTINCTIVE BEHAVIORIV. INSTINCTIVE BEHAVIOR

3. Ex: Hiding in the closet3. Ex: Hiding in the closet


A. A. InstinctInstinct- A complex pattern - A complex pattern of innate behavior.of innate behavior.

1. Begins with recognition of 1. Begins with recognition of a stimulus and continues a stimulus and continues until all parts of the behavior until all parts of the behavior have been performedhave been performed


B. B. Courtship BehaviorCourtship Behavior- - Behavior of males and Behavior of males and females before matingfemales before mating

1. Ensures reproduction and 1. Ensures reproduction and species survivalspecies survival

2. Ex 1: Fireflies have 2. Ex 1: Fireflies have distinctive flashing patternsdistinctive flashing patterns


3. Some courtship behaviors 3. Some courtship behaviors prevents the female from prevents the female from killing the male prior to killing the male prior to matingmating

a. Ex: Spiders give gifts a. Ex: Spiders give gifts for for the female to eat while the female to eat while

mating…pretty sneaky!!!mating…pretty sneaky!!!


C. C. TerritoryTerritory- A physical space - A physical space that an animal defends that an animal defends against members of the same against members of the same species.species.

1. Reduces competition1. Reduces competition

2. Includes feeding area, 2. Includes feeding area, breeding area & potential breeding area & potential matesmates


3. 3. PheromonesPheromones- Chemicals - Chemicals that can be sensed and used that can be sensed and used to communicate between a to communicate between a speciesspecies

1. Territories are often 1. Territories are often “marked” with pheromones “marked” with pheromones in urine, glands, etc.in urine, glands, etc.


D. D. Aggressive BehaviorAggressive Behavior- - Behavior used to intimidate Behavior used to intimidate another animal of the same another animal of the same speciesspecies

1. Used to protect young, 1. Used to protect young, food, territory, etcfood, territory, etc

2. Ex: Growling, bird calls, 2. Ex: Growling, bird calls, teeth, etcteeth, etc


3. Sometimes leads to 3. Sometimes leads to dominance hierarchiesdominance hierarchies where where social ranks are formed social ranks are formed (pecking order).(pecking order).

a. The ability to form a. The ability to form hierarchies is innate, but hierarchies is innate, but the position is learnedthe position is learned


E. E. Circadian RhythmCircadian Rhythm- 24 hour, - 24 hour, light regulated, sleep/wake light regulated, sleep/wake cyclecycle

1. Keep you awake during the 1. Keep you awake during the day and relaxed at nightday and relaxed at night

2. Controlled by genes, but 2. Controlled by genes, but can be influenced by external can be influenced by external influencesinfluences


3. Can also lead to 3. Can also lead to migrationmigration..

a. Instinctive, seasonal a. Instinctive, seasonal movement of animalsmovement of animals


4. 4. HibernationHibernation- The state in - The state in which body temp drops, which body temp drops, oxygen consumption oxygen consumption decreases and breathing decreases and breathing slowsslows

a. Excess body fat fuels the a. Excess body fat fuels the animals body during this animals body during this statestate


5. 5. EstivationEstivation- State of - State of reduced metabolism during reduced metabolism during conditions of intense heatconditions of intense heat

a. Desert animals estivate a. Desert animals estivate during droughtduring drought

b. Some animals estivate b. Some animals estivate even when plenty of food even when plenty of food and water are availableand water are available

THETHE

END!END!

innate behavior ch. 31. i. behavior a. define behavior 1. anything an animal does in response to a...

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