Part I: Response of the Betta Fish
- Slowly bring the mirror in front of the Betta Fish in the container. Do NOT leave the mirror in front of the container for more than one minute.
- Watch the gill area and fins for changes and record your observations. Be sure to identify the parts of the fish that change and how they change when the mirror is placed in front of the Betta (see diagram above).
- Record the following:
- Control Variables (at least 3)
- Manipulated Variable
- Responding Variable
Part II: Causes of the Betta Fish Response
In this part of the experiment we are going to try to determine what causes the Betta Fish to respond. We will use models you will make from paper to try to determine the cause of the response. For this investigation, we will try to determine if the response is determined by:
- The color (e.g. red, orange, yellow, green, blue, pink, black, white)
- The shape (that is, does the paper model have to be the shape of a Betta?)
- Both shape and color
Color Experiment
- Prepare small rectangles of at least 3 different colors of construction paper and attach them to a stick. The rectangle should be the approximate size of your Betta fish.
- Record the different colors in the left column of data table using the following key to describe the response of the Betta Fish (NR = No response; M = Mild response; S = Strong response).
- Show the Betta fish the models in order as shown in your table.
- For each model, slowly bring the model up in front of the fish. You may need to wave the model slowly to attract the fish.
- If you do not get a response in about 30 seconds, take the model away and let the fish rest for a minute or so. Then, try again. Repeat up to three times, and then if the fish does not respond, write NR in the table.
- Record the following:
- Control Variables (at least 3)
- Manipulated Variable
- Responding Variable