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Animal Behavior Mating Systems
Mating Systems
25
Biology
Undergraduate 4
03/27/2010

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Cards

Term
Ecological Factors of Mating Systems (3)
Definition
Female sociality
Female movement predictability
Habitat heterogeneity
Term
Primary Determinants of Mating Systems
Definition
Benefits of parental care
Female Distribution patterns
Term
Aspects of Female Distribution Patterns (3)
Definition
Resource distribution
Risk of predation
Benefits of group living
Term
Monogamy
Definition
male and female have only a single mating partner per breeding season
Term
Ecological Circumstances Favoring Monogamy (3)
Definition
Necessary biparental care
Distribution of females
Mate guarding
Term
Polygyny
Definition
One male mates with more than one female during a breeding season
Term
Circumstance Favoring Polygny
Definition
A male benefits by producing more offspring.
Term
Polygyny Threshold Hypothesis
Definition
Benefits of mating with high quality mate compensate for the cost.
Term
Best Alternative Hypothesis
Definition
Best of all available options
Term
Sexy Son Hypothesis
Definition
Access to good genes compensates for the costs.
Term
Polygyny Threshold
Definition
the difference in a territory’s quality that make secondary status a better reproductive option for females
Term
Types of Polygyny (4)
Definition
Resource Defense Polygyny
Female Defense Polygyny
Scramble Competition Polygyny
Lek Polygyny
Term
Resource Defense Polygyny
Definition
Males defend resources essential to female reproduction
Term
Conditions for Resource Defense Polygyny (4)
Definition
Patchy habitat
Quality of the monopolized resource reflects male quality
Females prefer males with resources over those without
Males with resources have higher mating and reproductive success (higher quality territory -> more females)
Term
Female Defense Polygyny
Definition
a male defends a harem of females.
Term
Scramble Competition
Definition
males will attempt to outrace each other to potential mates.
Term
Lek Polygyny
Definition
Males defend symbolic territories while not providing parental care.
Term
Lek
Definition
No moale parental care. No resource on territory. Males aggregate and display at traditional sites.
Term
Lek Paradox
Definition
With such strong selection how do you maintain the bad genes?
Term
Solution to lek paradox (2)
Definition
Genetic variation must persist for ornamental traits and genetic quality.
Ornament expression depends on condition.
Term
Polyandry
Definition
Female has more than one mate during the breeding season.
Term
Three types of polyandry
Definition
Sequential
Simultaneous
Cooperative
Term
Ecological reasons for polyandry (3)
Definition
Rich resource, eggs are cheap
Short breeding season
Male biased sex ratio
Term
Optimal Mating System for Females
Definition
Polyandry is always optimal. However as the environment increases, monogamy followed by polygyny close the gap.
Term
Optimal mating system for Males
Definition
As environmental quality increases, polyandry followed by monogamy, followed by polygyny.
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