{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

November 21 - Pheromones males are attracted to female sex...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Pheromones- males are attracted to female sex pheromones, emitters in fields, can also catch males, used as biological control for animals/insects Cacti—introduced into Australia. Became established in east Australia, climates are similar to climates here—the cacti were pre-adapted and were successful, sexually and asexually (joints of cactus). They avoid regulators and become pests. To regulate them an herbivore from the US is introduced—moth, whose caterpillar (cactoblastis) eats the joints. These caterpillars mainly ate prickly pear cacti (not native plants), so they were effective—this is biological control. Rabbits introduced to Australia by England—eat crops, native plants, and herbs, then became pests. They were very difficult to control. A disease (myxomatosis) was used to control them (only infected the rabbits). Normal growth curve increase, reaches carrying capacity, and then levels off (S curve). Human population size regulations: killing each other (war), resources go down (famine), natural disasters, disease, and emigrations (density dependent).
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern