Please! Anyone helps me answer all these questions? Case Study (Modified from a
ID: 132174 • Letter: P
Question
Please! Anyone helps me answer all these questions? Case Study (Modified from a study of Sam Houston State University) tanks that have You are concerned about the rate of death in catfish your aquaculture operation in a high amount identified. You find that it is a blue-green alga called Anabaena. Anabaena is known to be toxic to fish. You design an experiment to test how much of the algae the fish can stand before they die. You obtain 6 catfish the light and temperature values are identical. You let the water stand for one day before starting the experiment. In aquarium 1, you add 2 grams of algae and no fish. In aquarium 2, you add 20 small catfish and no algae. Aquarium 3 gets 20 catfish and 2 grams of al grams of algae, #5 gets 20 catfish and g grams of algae,and aquarium #6 gets 20 catfish and 16 grams of algae. The acration rate of each aquarium is identical. You make two observations at the same time each day for two weeks. You keep track of the numbers of fish in each tank that die. of algae growth. You collect some of the algae and send it to the university to have it large aquariums (all the same size) and fill them with water taken from a healthy pond at your operation. You put each aquarium on the same bench in the laboratory, where gae, #4 gets 20 catfish and 4 1. Describe the problem/ Ask a question 2. State the hypothesis. 3. What are the independent and dependent variables in the designed experiment? 4. Describe the control groups. 5. What things are held constant? 6. What is your expected result? 7. What is your conclusion based on your collected data prediction?Explanation / Answer
High amount of algae (anabaena) is toxic to catfish and can cause death of catfish. The experiment was conducted to find out the toxic dose of anabaena to catfish. Hypothesis: Algae (anabaena) in toxic doses cause death of catfish Independent variable is the presence of different doses of algae. Dependent variable is the catfish mortality The control groups are aquariums 1 and 2 Light exposure and temperature are held constant The expected result would be with increase in the concentration of algae, there is greater mortality rate of catfish Conclusion: Algae in toxic doses is lethal for catfish