Fish Growth Model Implement a Model for Salmon Growth Report Writing Assessment Answer
Assessment Task:

SECTION A

QUESTION A1: Implement a model for salmon growth Can you implement a model for salmon growth.

 

QUESTION A1.1: How much did your salmon grow in the one year of your model run? 

QUESTION A1.2: How long do you need to run your model for your salmon to reach 5 kg?

QUESTION A1.3: Is the growth limited somehow? Why is this not relevant here?

QUESTION A2: Implement a model for salmon growth including abiotic factors Can you update your salmon model to include the influence of temperature in the cold waters of Norway in winter (average temperature of 6 degrees)?

QUESTION A2.1: How much did your salmon grow in the one year of your model run now? 

QUESTION A2.2: How long do you need to run your updated model for your salmon to reach 5 kg?

QUESTION A3: Estimating growth rates per day and at different temperatures Can you calculate how much (in percentage) your salmon grows per day throughout the entire runtime?

QUESTION A3.1: Does the shape of your resulting plot make sense? 

QUESTION A3.2: What changes if you test for other temperatures (e.g., 9, 12, 15 and 18 degrees)?

 

Step 2: Food consumption during fish growth

QUESTION 3: Food composition Can you calculate?

1) The specific energy content (SEC) of the fish feed Answer

2) The fraction of energy content due to protein (Ep), fat (Ef), and carbohydrates (Ec).

 

QUESTION A4: Can you calculate Qg? Plot the result

QUESTION A5: Can you calculate Qs? Plot the result

QUESTION A6 and A7: Biochemical energy cost and fecal loss Can you calculate?

1) BC-based on the fraction of energy content in protein, fat, and carbohydrates? Answer

2) The non-assimilated fractions of energy content due to protein, fat, and carbohydrates?

QUESTION A8: Solving the equation for Qr Can you solve the equation for Qr? Include all steps needed to reach the answer (manual calculation)

Step 3: Estimate the food conversion ratio (FCRt)

 

QUESTION A10: Food conversion ratio Can you now calculate and plot the FCRt as a function of the fish weigh?

QUESTION A10.1: Different food compositions

Can you compare the FCRt results you obtained with those for the following two food compositions?

1) 45% protein, 30% fat and 7% carbohydrates

2) 35% protein, 40% fat and 7% carbohydrates

 

QUESTION A10.1: Different food compositions

Can you compare the FCRt results you obtained with those for the following two food compositions?

1) 45% protein, 30% fat and 7% carbohydrates

2) 35% protein, 40% fat and 7% carbohydrates

 

QUESTION A12: Plot retention of protein Can you calculate and plot the protein retention by the fish for each food composition?

 

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