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Chapter 54 Animal Behavior “Behavioral Ecology”
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54.1 Approaches to the Study of Behavior Behavior- How an animal responds to stimuli in its environment A. Behavior’s two components 1. Proximate Causation- 2. Ultimate Causation- B. Innate Behavior- does not have to be learned 1. Sign Stimulus- The physical “trigger” or cause. 2. Fixed Action Pattern- A set (uncontrollable) reaction.
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Proximate causation The direct cause of a behavior Training, learning Hormones
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Ultimate causation (distal) Explanation of an animal's behavior based on evolution.evolution specific behavioral trait was favored by evolutionary mechanisms such as natural selection natural selection
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Innate behavior Does not have to be learned “instinct”
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Sign Stimulus- The physical “trigger” or cause Ex. sea gull chick pecks at red spot on mother
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Fixed Action Pattern- FAP A sequence of actions that is unchangeable and carried to completion once initiated Usually started by a sign sequence Ex. Shaking display by great crested grebes:
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FAP – Digger wasps 1)
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FAP - 3 spined stickle back fish Will attack anything w/red underbelly no aggression Attack
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Human FAP Raise brow and eye lids at same time
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54.2 Behavioral Genetics A. Rats can be artificially selected for intelligence. B. Identical twin studies reveal similarities that are not dependent on environment. C. Some behaviors are controlled by a single gene.
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54.3 Learning- Altering behavior as a result of previous experience. Modification of behavior based on experience Ex. Monkeys learn warning signals
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Maturation is NOT learning When birds mature, they fly, with out parent
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Nonassociative Learning- Does not require an association between stimulus and response.
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Habituation- A decrease in response to a repeated stimulus Why drug addicts need MORE
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Associative Learning- Does form a link between stimulus and response.
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Classical conditioning- Pavlovian Conditioning- 2 different kinds of stimuli cause the animal to form an association. Pavlov’s dog – conditioned to drool when bell rang
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B. Operant conditioning- An animal learns through reward or punishment Trial and error
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Invisible fence What type? Operant
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What type Pavlovian – clicker means treat
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Sexual imprinting- an individual learns to direct its sexual behaviors toward members of its own species.
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Cross fostering- individuals that are raised by a different species want to mate with members of the foster species.
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54.4 The Development of Behavior Imprinting- When parent-offspring interactions influence behavior later in life. Ex. Konrad Lorenz and his goslings Ex. Wrong imprinting Ex. Harlow’s rhesus monkeys
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Imprinting- When parent-offspring interactions influence behavior later in life. Ex. Konrad Lorenz and his goslings Goslings took him to be mother
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Ex. Wrong imprinting Who’s your mother??
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imprinting Ex. Harlow’s rhesus monkeys
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Cognitive Behavior Requires thought or brain process
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Play Practices survival skills
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Problem solving
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Migration
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Navigation Monarch butterflies know how to get home
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Orientation Knowing where you are Salmon know which steam to enter to get to where they were born
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Social behaviors Cooperative prey captures African wild dogs
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Dominance and Hierarchy Top dog (wolf)
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Territory behavior
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54.5 Animal Cognition Cognitive behavior – shows the ability to think, problem solve. Ex. Birds Ex. Chimps
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54.6 Orientation and Migration Orientation- tracking stimuli in the environment. (Ex. Traveling from the nest to a water source and then back) Migration- long-range, two-way movements that are usually seasonal. (follow a bearing) Navigation- The ability to set or adjust a bearing. (Painted Bunting)
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54.7 Animal Communication Species recognition and reproductive success- courtship signals. (Blue footed boobies)(Blue footed boobies) Long-distance communication Pheromones- chemical signals that communicate with animals of the same species and different species. Low Frequency Sounds- cover long distances
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54.7 Communication allows individuals to live as groups. Ex. Honey bee dance Ex. Alarm calling Ex. Primate language
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54.8 Behavioral ecology
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Adaptive significance An organism has a trait that helps them survive
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Optimal foraging theory organisms forage in such a way as to maximize their energy intake per unit time organismsenergy
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Territoriality Animal claims its territory Not species specific
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Sexual Selection Species specific
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Intrasexual selection Competition between same sex for mate
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Intersexual selection Competition to be the most desirable mate as judged by opposite sex
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Extra pair copulations When a monogamous paired animal mates with another (In humans this is adultery or cheating)
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54.10 Altruisms Helping another without benefit or with danger to self
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Reciprocal altruisms Most animal altruisms are reciprocal, not true altruisms (soldier falls on grenade) You help me, I will help you
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Kin selection When members of a population help others survive
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Social insects Work together for common good Termites Honey bees
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54.11 Evolution of Social systems
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Insect societies have castes Ex. Queen bee Produced by royal jelly
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Honey bees Drones (male bees) mostly useless, but a few get to mate with queen and pass on genes
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Leaf cutter ants Build huge mounds, ants have different jobs
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Vertebrate Societies Meerkats some guard while others eat
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Lions Males defend Females hunt
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African Weaver birds - forest Camouflaged nests Polygamous Insect eaters
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African Weaver birds - savanna Nests in Trees Polygamous Seed eaters
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