Animal Behavior

Nature: Refers to genetics and innate behaviors that are developmentally fixed.
Nurture: Refers to the environment and learned behaviors, commonly acquired from parents or through trial and error.
Randomness/Other Factors: Differences in prenatal environment can influence development, particularly in monozygotic (identical) twins, where one twin may receive more nourishment than the other. This includes:
- Epigenetic Differences: Variations in gene expression influenced by environmental factors.

Definition: Ethology examines how behavior evolved to enhance an organism's fitness in its environment, thereby improving survival rates and gene propagation.

Behavior: Males defend nesting territories by attacking intruding fish.
Sign Stimulus: The red underside of an intruder triggers an aggressive response.
Fixed Action Pattern (FAP): A sequence of innate, unlearned acts directly linked to a specific simple stimulus.

Foraging: The process of searching for and obtaining food.
Animals engage in Optimal Foraging, weighing the costs and benefits of their food acquisition strategies.
- Bluegill Sunfish Case Study:
- Diet consists mainly of daphnia, small aquatic crustaceans.
- While large daphnia provide more energy, distance may compel the fish to select smaller, closer prey.

Definition: The loss of responsiveness to a stimulus after repeated exposure.
Example: The “cry wolf effect,” where repeated false alarms lead to diminished responses.

Definition: A specific, long-lasting form of learning that occurs at a particular life stage, directed towards a specific individual or object.
Critical Period: A limited timeframe during which imprinting occurs.
Lorenz's Experiment: Observed that goslings would follow a human instead of a goose if exposed to the human shortly after hatching, resulting in a lack of affiliation with adult geese.

Nocturnal Animals: Often utilize the north star for navigation.
Diurnal Animals: Rely on the sun for navigation.
Some animals possess the ability to. interpret the Earth's magnetic field:
- Mechanisms: Presence of magnetite in their heads and photoreceptors in their eyes that perceive the magnetic field.

Definition: The process of linking environmental features to one another.
Types:
- Classical Conditioning: Involves associating an arbitrary stimulus with a particular outcome.
- Pavlov's Dogs: Pavlov rang a bell before delivering powdered meat to dogs, leading them to salivate at the sound of the bell alone after repeated conditioning.
- Operant Conditioning: Learning through consequences, associating behavioral actions with rewards or punishments.
- Skinner Box: Rats learn to press a lever for food; initial pushes are accidental but become purposeful after reinforcement.

Definition: The cognitive ability to solve problems and adapt to various situations.
Study Example: Jane Goodall's research on the cognitive capabilities of chimpanzees.

Proximate Causation: Explains how a behavior occurs, focusing on immediate causes.
Ultimate Causation: Examines why a behavior exists from an evolutionary perspective.

Definition: Internal mechanisms that maintain a biological cycle of approximately 24 hours.
Role of Melatonin: Secretion of this hormone from the pineal gland facilitates the onset of sleepiness and regulation of sleep cycles.

Territoriality: Involves defending a specific area against others.
Agonistic Behavior: Ritualized confrontations that determine access to resources or mating.
- Dominance Hierarchy (Pecking Order): A ranking system among animals,
- The Alpha is the top-ranked individual controlling group behavior.
- Below the Alpha, the Beta remains the second-ranked individual overseeing the rest in the hierarchy.
- Common in social animals such as birds, fish, social insects, and primates.

Josh Nash: Developed Game Theory, which states that outcomes depend on the strategies employed by all individuals involved in a situation.
Mating Success: Influenced by the relative abundance of other competing species or types.

Definition: The area that an animal roams within but does not actively defend against others.