BIEB 166 Lecture 10 (WI13)

4 Pages
118 Views
Unlock Document

Department
Biol/Ecology, Behavior, & Evol
Course
BIEB 166
Professor
James Nieh
Semester
Spring

Description
Lecture 10 Kinesis - Undirected orientation movements Parameium Kinesis - Animal that eat things like bacteria - Whenever it reaches an area with less bacteria, it moves more rapidly and randomly (always moves randomly) - When it reaches an area with more bacteria, it moves slowly ○ Spend more time with area that has more food Human Body louse - Like to be in hair - They do not have vision - They move around in the environment, and whenever they move into an area that has a lot of hair to grab onto, they tend to stay there for a long time - They rapidly move out of area without hair - Random since they are not directed to anything - Movement is random, but speed changes Taxis - Directed orientation movements with respect to a stimulus Phototaxis Fungus - Spores growing towards the light - Positive phototaxis - For negative phototaxis, the spores would move out of the way of the light Phonotaxis - Orientation towards sound Cricket - Ears in their thorax, and each of the front legs - Females can listen to the sound of the calling male, and orient the location of the calling male - Positive phonotaxis - Tropotaxis Chemotaxis - Towards certain chemical Amoeba - Pseudo-foot ○ Propelling themselves to move in one direction - Moving in the direction of food ○ Tasting with the chemo-receptors - Positive chemotaxis Snake - It is using its tongue to sense the slime trail ○ Get the slug by following the slime trail - Using its tongue in a klinotatic way Anemotaxis - Sensing the wind Menotaxis - Animal maintaining a constant angle to a stimulus - Simplest angle: 0 degree (going directly to the stimulus) - Simplest angle: 0 degree (going directly to the stimulus) Silk moth menotaxis - Female producing sex pheromone - Males are very much attracted to it ○ They can sense and response to the pheromone - They'd die after they mate 1. Male behaviors - Initially searching for odor ○ Flies at 90 degrees to wind (menotaxis) ○ Maximize the chances of finding the molecule ○ Fixed angle - Finds some odor molecules ○ Flies upwind (positive anemotaxis) ○ Responding to the wind, not the odor ○ Also an example of menotaxis - Loses the odor ○ Flies in a random zigzag (kinesis) ○ Randomly searching in the environment to look for another odor molecule - High odor concentration ○ Flies up chemical gradient (positive chemotaxis) ○ Sense significant increase in concentration of the odor - Lots of strategies are used in life to look for different object (maybe both taxis and kinesis) Bombyx mori Klinotaxis - Successive sampling while moving through a gradient - How it is using its sensors (using as one thing or two separate things) Fly maggot - Very poor vision, but there are photoreceptors on the head - Want to stay away from the light ○ If it is exposed, they might be eaten by predators, or dried out - Hide inside the cavities of the barks of trees - Negative phototaxis (moving away from the light) - Using the eyes as a single sensor (not comparing) Tropotaxis - Taking simultaneous samples from pai
More Less

Related notes for BIEB 166

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit