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Chapter 9

Across
Males mate with multiple females
The reproductive output that occurs because of an act of altruism (an animal's kin has kids because of the food that animal gave her)
An action that incurs a cost to the individual performing it but benefits the ricipient
A behavior that is triggered by a specific circumstance that runs to completion once started
A male stickleback responding aggressively to another male with a red belly is what type of behavior?
Typically, when a male protects a female that he's mated with from the advances of other males
Females mate with multiple males
Down
Any action performed by an individual
A type of behavior that is learned after watching another individual respond to a stimulus
The total number of offspring (reproductive output) of a SINGLE individual
When a female chooses a male based on the offerings he brings her before mating
Some individuals mate with multiple partners
The way that animals send messages to one another - chemical, physical or audial
Mating for life
A behavior that develops as a result of observation or instruction