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Behavioral Ecology and Conservation

Behavioral Ecology and Conservation. Invasions and behavior. Colonization High dispersal Omnivory Asexuality Competitive ability Unicolonial Argentine ants Escape from native enemies Dispersal in fire ants Polygyne colonies bud

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Behavioral Ecology and Conservation

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  1. Behavioral Ecology and Conservation

  2. Invasions and behavior • Colonization • High dispersal • Omnivory • Asexuality • Competitive ability • Unicolonial Argentine ants • Escape from native enemies • Dispersal in fire ants • Polygyne colonies bud • Monogyne colonies take mating flights, spread 3 orders of magnitude faster

  3. Sexual selection and conservation • Introduction / persistence and sexual selection • Parental investment • Sex ratio • Mating system

  4. Allee effects • Low population size  r < 1 • Increased predation risk • Reduced foraging efficiency • Difficulty finding mates

  5. Sexual selection and the Allee effect • Mating probability and population size • With preferences • Mate quality and female investment

  6. The kakapo • Moved to predator-free islands • Began provisioning females • Resulted in male biased SR • Low reproduction • Now provision after laying

  7. Captive breeding • Imprinting on caretakers • Cross fostering • Siblicide • Double clutching • “Hacking” • Predator encounters

  8. Good genes and conservation • Sexual selection disrupted • Imposed monogamy • Inferior sires, weakened stock • Zoo collections • Trophy hunting • In salmon

  9. Trophy hunting for bighorn rams Coltman et al. 2003 Nature 426:655-658

  10. Harvest & infanticide

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