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Aquaponics Post 1

Does the diet- vegetarian or carnivorous- of Fancy Guppies (Poecilia reticulata) affect the growth rate of lettuce (Lactuca sativa)?

Hypothesis: If the Fancy Guppies consume a vegetable based diet, then the Fancy Guppies will produce more waste due to the nutrients and the lettuce will grow at a faster rate. 

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Materials (all via Amazon)

  • 2 ten gallon tanks 

  • 10 (5 in each tank) Fancy female Guppies 

  • Vegetables and Blood Worms 

  • 2 air pumps

  • Day light lamp with timer 

  • 10 Lettuce seeds 

  • 2 bucket with clay pebbles 

  • 2 air stones 

  • Food fish net

Procedure

  1. Retrieve a ruler to measure the lettuce.

  2. Place the end of ruler that starts at one centimeter parallel to the beginning of where the stem starts to form just above the roots.

  3. Read the measurement of the ruler observed (cm) and record in lab notebook.

  4. Repeat steps 1-3 nine more times biweekly. 

  5. Feed the Fancy Female Guppies in Tank 1 1/4 a handful of vegetables and Tank 2 with 3 bloodworms.

  6. Retrieve the remaining bloodworms and vegetables, 3 minutes after putting them in.

  7. Repeat steps 4-6 daily. 

  • Independent Variable- The independent variables will be the vegetable-based diet and the carnivorous-based diet. 

  • Dependent Variable- The dependent variable will be the average vertical growth(cm) of the lettuce. 

  • Control Variables- The controlled variables will be the pH of the water, the amount of light they receive, the water temperature, the plant being grown, the medium used, and the living organisms in the tanks.

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Data being collected: We will be measuring the average growth of the lettuce per day monthly in cm from each aquaponic system. 

How the data will be collected: We are going to alternate coming in every Tuesday and Thursday in the morning before 8:00 AM, to  measure the growth of the lettuce in (cm). To keep track of the data we will write down the measurements and put them into a google doc. We will also take pictures every Tuesday and Thursday to show the pictorial growth.

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When the data will be collected: Biweekly in the morning. 

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How data will be analyzed: Our quantitative data will be measured by the amount of growth(cm) the lettuce in each aquaponics system produced - one with system with Fancy Guppies having a vegetable based diet and another system where they are on a blood-worm based diet- per month. It will be measured by adding the total amount of growth per month and dividing it by the total numbers of days in each month. Our qualitative data will be analyzes by taking pictures biweekly from both systems.

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How data will be presented: Our quantitative data will be shown with line graphs of the average growth per day per month for each systems with the months on our x-axis and cm of growth on our y-axis

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