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Animal Behavior Lab

Animal Behavior Lab. Taxis and Kinesis. responses that allow a mobile organism to maintain a favorable environment. Taxis. Directional response to stimulus ex – moves toward ( positive) from stimulus or m oves away ( negative) from stimulus. Examples of taxis.

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Animal Behavior Lab

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  1. Animal Behavior Lab

  2. Taxis and Kinesis responses that allow a mobile organism to maintain a favorable environment

  3. Taxis Directional response to stimulus ex – moves toward (positive) from stimulus or moves away (negative) from stimulus

  4. Examples of taxis Single celled algae – As algae are photosynthetic they move towards light (positive phototaxis). other examples?

  5. Kinesis Non directional response to stimulus The more unfavorablethe conditions the more rapidly the organism moves and changes direction more often. This response enables the organism to return to favorable conditions more rapidly.

  6. Examples of kinesis Woodlice – lose water in dry conditions. • When in dry area – move more rapidly + change direction more often • When in damp area – move less rapidly + change direction less often.

  7. Kinesis vsTaxis • Taxis - enables a faster direct response to the stimulus but is only possible if the stimulus is directional • Kinesis – A slower response but allows a response to a stimulus that isn’t always directional; ex: temperature and humidity

  8. Sexual Differences In Pillbugs female male

  9. Animal Behavior Lab TODAY: 1. read background information while preparing your experimental trials 2. discuss and record answers to the five reflection questions before conducting experimental trials 3. Conduct experimental trials 4. clean up & plan out report

  10. Role of Hox Genesin Isopod founders?

  11. Hox Genes in History

  12. *1. Why is the environment described above ideal for the isopods?

  13. *2. What are some current terrestrial isopod behaviors that have their direct root in the aquatic past of the founding common ancestor?

  14. *3. How are TAXIS and KINESIS shown (or interpreted) in your observations (control and experimental trials)?

  15. *4. What is the hypothesis of your experiment? On what research (or prior knowledge) is this hypothesis based? *5. What data is to be collected during both the control and experimental groups? How will this data be used to determine the choice preferences of the isopods?

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