Guest Lectures Flashcards
When should you mate choice copy?
- When it is tough to discriminate mate quality.
- When cost of poor mate choice is high.
- Allocare behaviour.
Ainsley – Plainfin Midshipman
In their final experiment with a female demonstrator copying design, they found that females preferred spawning in the same nest as demonstrators.
Daffodil Cichlids – Aggression
Dominance hierarchy – with a breeding pair and several subordinates. These dominance hierarchies function to reduce aggression. They also influence hormone levels.
Daffodil Cichlids & Cortisol
Paradox of cortisol. Higher in lab subordinates (because of the stress of living under a dominant), but higher in wild dominants (because they have a lot to lose, unlike in a lab, where nothing is taken away from them.)
Daffodil Cichlids – Parental Care
Mouthbrooding, and cooperative (group contributes) care for young. But the dominant female contributes the most of all of them.
Daffodil Cichlids & Galanin
Caring parents lose more weight, less time to feed themselves, energy spent on providing care. This is regulated by Galanin.
Fish eating less had higher galanin. Females reduce foraging rates despite physiological urge to eat.
Daffodil Cichlids – Cooperation
Cooperative breeders. Subordinates help with allocare, territory maintenance, and defense. Believed that this helping is a sort of pay to stay model. They only help because the dominants make them, allowing them to survive, grow, and possibly become dominant in the future.
Daffodil Cichlids – Affiliation
They live in social groups their whole lives, and prefer to spend time with their own group. This allows for social buffering of stress. Levels of cortisol were higher when fish were left alone to recover from stress, as opposed to with their groupmates.
Eli – How does social rank influence social learning?
Found that dominants social learn faster, and that all ranks learn faster from dominants.
