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Evolutionary Impact of Humans as Selective Force: Largemouth Bass Personality Variation

Explore how humans influence evolution through artificial and unintentional selection, focusing on the personality variation in largemouth bass. Discuss fishing as a selective force and its consequences on fish populations. Includes a simulation activity to analyze the impact of fishing on personality types in a bass population.

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Evolutionary Impact of Humans as Selective Force: Largemouth Bass Personality Variation

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  1. Humans as a selective force In this concurrent session, we will discuss some of the many species that humans act as a selective force on, how human selection occurs on those species, and the evolutionary consequences had on those species. We will then examine in detail how fishing can be a selective force, which will include performing a fishing simulation.

  2. Outline • Discuss massive size of human population and the increasingly large role we play in how the earth functions. • One such role being that of a selective force • Two types of human driven selection • Artificial selection: Humans intentionally select for certain traits (crops, livestock, horses, etc) • Discuss targets of selection, what is needed for evolution to take place, and evolutionary consequences for the different examples • Natural selection: Humans unintentionally select for certain traits, either directly or indirectly through their actions (hunting, fishing, habitat modification, global warming, etc.) • Discuss targets of selection, what is needed for evolution to take place, and evolutionary consequences for the different examples • Specific example with selection on fish personality • Do activity • Discuss activity

  3. Humans as a Selective Force

  4. Humans as a Selective Force

  5. Artificial Selection

  6. Unintentional Selection

  7. Personality in largemouth bass • Largemouth bass vary in personality type • Bold and shy • Why is there variation in personality type? • What maintains variation? • How does fishing impact the personality types observed in a population?

  8. Personality in largemouth bass • Characterizing personality in largemouth bass

  9. Personality in largemouth bass • Largemouth bass population simulation: • Perform simulation • Analyze class data • Answer questions • Class discussion • Feedback

  10. Personality in largemouth bass Graph the percent of each personality type in no fishing lakes and in fishing lakes from after reproduction in generation 1 to after reproduction in generation 5. Any suggestions for improvements to the lesson?

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