animal behavior Flashcards
(50 cards)
an action carried out by muscles under control of the nervous system
behavior
-what stimulus elicits the behavior, and what physiological mechanisms mediate the response?
-how does the animal’s experience during growth and development influence the response?
-how does the behavior aid survival and reproduction?
-What is the behavior’s evolutionary history?
maximizes an individual’s fitness
optimal behaviors
the study of ecological and evolutionary basis for animal behavior
behavioral ecology
addresses “how” a behavior occurs or is modified, including Tinbergen’s questions 1 and 2
proximate causation
addresses “why” a behavior occurs in the context of natural selection, including Tinbergen’s questions 3 and 4
ultimate causation
a sequence of unlearned acts directly linked to a simple stimulus
fixed action pattern
causation example
-fish breed in the spring
-proximate causation: triggered by day length
-ultimate causation: breeding is most successful when food is present and temperature is optimal
trigger for a behavior is an external cue
sign stimulus
a regular long distance change in location
migration
an internal mechanism that maintains a 24 hour activity rhythm or cycle
circadian clock
behavioral rhythms linked to the yearly cycle of seasons
circannual rhythms
stimulus transmitted from one organism to another
signal
transmission and reception of signals between animals constitutes
communication
Fruit Fly Courtship
- A male identifies a female of the same species
-Chem comm.: he smells a female’s chemicals in the air
-Visual comm.: he sees the female and orients his body towards hers - The male alerts the female to his presence
-Tactile comm.: he taps the female w a foreleg
-Chem. comm.: he chemically confirms the female’s identity - The male produces a courtship song to inform the female of his species
-Auditory comm.: he extends & vibrates his wig
-motivates the follower bees to leave the hive and search for nearby food
-returning bee moves in tight circles while moving its abdomen from side to side
round dance
-when the food source is farther from the nest, the returning bee instead performs
-half circle swing in the other direction, straight run during which the bee waggles its abdomen, and a half-circle swing in the other direction
waggle dance
Courtship behavior of the fruit fly (summary)
-Orienting: male visually recognizes female. Female releases chemicals detected by the male’s sense of smell
-Tapping: male taps female’s abdomen with a foreleg
-Singing: Male extends and vibrates wing, producing a courtship song
many animals that communicate through odors emit chemical substances called
pheromones
developmentally fixed and does not vary among individuals
innate behavior
place the young from one species in the care of adults from another species
cross-fostering studies
allows researchers to compare the relative influences of genetics & environment on behavior
twin studies
is the modification of behavior based in specific experiences
learning
is a behavior that includes learning and innate components and is generally irreversible
Imprinting