Animal Reproductive Strategies

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Questions and Answers

What strategy involves traits that help individuals locate and access mates?

  • Endurance rivalry
  • Mate guarding behaviour
  • Sperm competition
  • Scramble competition (correct)

Which behavior is characterized by competing to outlast rivals during the reproductive season?

  • Infanticide
  • Coercion
  • Sperm displacement
  • Endurance rivalry (correct)

Which of the following best describes the role of sperm competition?

  • Fostering mate guarding
  • Enhancing sperm abundance and displacement (correct)
  • Increasing coercive behaviours
  • Promoting attractive features

What tactic can improve an individual's success in forced copulation?

<p>Traits improving confrontation success (A)</p> Signup and view all the answers

What behavior is considered a coercive tactic in mating strategies?

<p>Infanticide (C)</p> Signup and view all the answers

What is the primary purpose of mate guarding behavior?

<p>To prevent rivals from accessing a mate (A)</p> Signup and view all the answers

Infanticide is considered a beneficial behavior that leads to increased individual fitness.

<p>False (B)</p> Signup and view all the answers

What is the term for the strategy that emphasizes sperm abundance and displacement?

<p>Sperm competition</p> Signup and view all the answers

During mating season, individuals may engage in __________ rivalry to ensure their reproductive success.

<p>endurance</p> Signup and view all the answers

Match the following mating strategies with their definitions:

<p>Sperm displacement = Removing a rival's sperm from female reproductive tract Coercion = Using force or the threat of force to secure reproductive access Infanticide = Killing offspring to improve reproductive chances Attractive features = Characteristics that enhance perceived desirability to mates</p> Signup and view all the answers

Flashcards

Same-sex contests

Competition between individuals of the same sex for access to mates or resources.

Sensory/locomotory traits

Physical characteristics helping find and attract mates.

Scramble competition

A competition where individuals try to get the most resources, like a mate, as quickly as possible.

Reproductive seasonality

Timing mating to specific periods.

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Endurance rivalry

Competition where individuals compete in prolonged activities, to access a mate.

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Sperm abundance

The amount of sperm produced.

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Sperm competition

Competition between sperm of different males to fertilize an egg.

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Mate guarding behaviour

Actions males take to prevent other males from mating with their mate.

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Coercive behaviours

Aggressive actions to force mating.

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Coercion

Using force or threat to achieve a result, such as mating.

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Infanticide

The killing of a newborn.

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Attractive features

Traits that increase mating success.

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Same-sex contests

Competition between same-sex individuals for mates.

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Sensory/locomotory traits

Physical features aiding mate finding and access.

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Scramble competition

Fast competition to get mates/resources.

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Reproductive seasonality

Mating tied to specific times.

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Endurance rivalry

Long-term competition for mates.

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Sperm competition

Sperm competing to fertilize the egg.

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Coercion

Forceful mating behaviour.

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Infanticide

Killing newborn offspring.

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Attractive features

Traits increasing mating success (not fitness).

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Study Notes

Same-Sex Contests

  • Animals compete for mates in various ways.
  • Sensory and locomotory traits help in mate searching and access.
  • Scramble competition is a type of competition.
  • Reproductive seasonality affects competition intensity.
  • Endurance rivalry is a form of competition where individuals try to outlast each other.

Sperm Competition

  • Sperm abundance directly impacts success in sperm competition.
  • Sperm displacement is a strategy used during sperm competition.
  • Mate guarding behaviour is another strategy.

Coercion

  • Coercive behaviours, features enhance success in forced copulation.
  • Traits that aid confrontation or avoidance play a role in coercion.

Infanticide

  • Infanticide can be a reproductive strategy.

Mate Attraction

  • Attractive traits are not always linked to individual fitness.

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