When determining the km value the variables were kept specific values, as described below. Afterwards the water temperature and other variables were changes to values more resembling North Africa. These setting are described below, but can also be adjusted using the sliders below the info box.

The model contains factors such as fish growth, temperature, Km, water flow and aquarium size. The weight-specific fish respiration is determined by water temperature and Km value.

When looking at the oxygen concentration (µmol/L) as a function og time (hrs), the Km value was estimated to 40 µmol.

Wet fish biomass consists of 45% carbon, 10% nitrogen, 1.5% phosphor, 1.5% minerals and 43% water. As one mole of carbon weighs 12 grams, is is associated with 26.7 grams of fish biomass. This means that for every one mole of carbon the fish stock assimilate, 26.7 grams biomass is gained. 

For determining the growth rate it is  assumed that for every mole of oxygen is respired, one mole of carbon is assimilated. Thus the growth is:

Growth in kg = [Fish respiration] * 2.64*10^(-8)

The initial fish stock was 0.076 kg corresponding to 20 goldfish with an average mass of 3.8 grams as described in Fry and Hart (2007).

The factors was set values similar to those expected in North African aquaculture.

Oxygen concentration & cichlid respiration

The initial oxygen concentration in the aquarium were ~245.5 µmol/L, but drops to about 238 µmol/L within five hours. From 5 hrs to the end of the experiment there is a slight drop to 230.5 µmol/L.

The initial fish stock respiration were 3693 µmol/hr and increased to 7645 µmol/hr after six months. 

A flow rate of 500 L/hr seems appropriate for a runtime of six months as the small decrease in oxygen concentration most likely won't affect the fish.

Fish stock

The initial fish stock were 0.576 kg, corresponding to 24 tilapia cichlids of 24 g. After six months the fish stock is at 1.201 kg, which is an increase of 208.5%. However, I would recommend that a company should more and larger tanks, as 1.201 kg of fish after six months of work does not seem profitable.

When determining the km value the variables were kept specific values, as described below. Afterwards the water temperature and other variables were changes to values more resembling North Africa. These setting are described below, but can also be adjusted using the sliders below the info box.

The model contains factors such as fish growth, temperature, Km, water flow and aquarium size. The weight-specific fish respiration is determined by water temperature and Km value.

When looking at the oxygen concentration (µmol/L) as a function og time (hrs), the Km value was estimated to 40 µmol.

Wet fish biomass consists of 45% carbon, 10% nitrogen, 1.5% phosphor, 1.5% minerals and 43% water. As one mole of carbon weighs 12 grams, is is associated with 26.7 grams of fish biomass. This means that for every one mole of carbon the fish stock assimilate, 26.7 grams biomass is gained. 

For determining the growth rate it is  assumed that for every mole of oxygen is respired, one mole of carbon is assimilated. Thus the growth is:

Growth in kg = [Fish respiration] * 2.64*10^(-8)

The initial fish stock was 0.076 kg corresponding to 20 goldfish with an average mass of 3.8 grams as described in Fry and Hart (2007).

The factors was set values similar to those expected in North African aquaculture.

Oxygen concentration & cichlid respiration

The initial oxygen concentration in the aquarium were ~245.5 µmol/L, but drops to about 238 µmol/L within five hours. From 5 hrs to the end of the experiment there is a slight drop to 230.5 µmol/L.

The initial fish stock respiration were 3693 µmol/hr and increased to 7645 µmol/hr after six months. 

A flow rate of 500 L/hr seems appropriate for a runtime of six months as the small decrease in oxygen concentration most likely won't affect the fish.

Fish stock

The initial fish stock were 0.576 kg, corresponding to 24 tilapia cichlids of 24 g. After six months the fish stock is at 1.201 kg, which is an increase of 208.5%. However, I would recommend that a company should more and larger tanks, as 1.201 kg of fish after six months of work does not seem profitable.

When determining the km value the variables were kept specific values, as described below. Afterwards the water temperature and other variables were changes to values more resembling North Africa. These setting are described below, but can also be adjusted using the sliders below the info box.

The model contains factors such as fish growth, temperature, Km, water flow and aquarium size. The weight-specific fish respiration is determined by water temperature and Km value.

When looking at the oxygen concentration (µmol/L) as a function og time (hrs), the Km value was estimated to 40 µmol.

Wet fish biomass consists of 45% carbon, 10% nitrogen, 1.5% phosphor, 1.5% minerals and 43% water. As one mole of carbon weighs 12 grams, is is associated with 26.7 grams of fish biomass. This means that for every one mole of carbon the fish stock assimilate, 26.7 grams biomass is gained. 

For determining the growth rate it is  assumed that for every mole of oxygen is respired, one mole of carbon is assimilated. Thus the growth is:

Growth in kg = [Fish respiration] * 2.64*10^(-8)

The initial fish stock was 0.076 kg corresponding to 20 goldfish with an average mass of 3.8 grams as described in Fry and Hart (2007).

The factors was set values similar to those expected in North African aquaculture.

Oxygen concentration & cichlid respiration

The initial oxygen concentration in the aquarium were ~245.5 µmol/L, but drops to about 238 µmol/L within five hours. From 5 hrs to the end of the experiment there is a slight drop to 230.5 µmol/L.

The initial fish stock respiration were 3693 µmol/hr and increased to 7645 µmol/hr after six months. 

A flow rate of 500 L/hr seems appropriate for a runtime of six months as the small decrease in oxygen concentration most likely won't affect the fish.

Fish stock

The initial fish stock were 0.576 kg, corresponding to 24 tilapia cichlids of 24 g. After six months the fish stock is at 1.201 kg, which is an increase of 208.5%. However, I would recommend that a company should more and larger tanks, as 1.201 kg of fish after six months of work does not seem profitable.

When determining the km value the variables were kept specific values, as described below. Afterwards the water temperature and other variables were changes to values more resembling North Africa. These setting are described below, but can also be adjusted using the sliders below the info box.

The model contains factors such as fish growth, temperature, Km, water flow and aquarium size. The weight-specific fish respiration is determined by water temperature and Km value.

When looking at the oxygen concentration (µmol/L) as a function og time (hrs), the Km value was estimated to 40 µmol.

Wet fish biomass consists of 45% carbon, 10% nitrogen, 1.5% phosphor, 1.5% minerals and 43% water. As one mole of carbon weighs 12 grams, is is associated with 26.7 grams of fish biomass. This means that for every one mole of carbon the fish stock assimilate, 26.7 grams biomass is gained. 

For determining the growth rate it is  assumed that for every mole of oxygen is respired, one mole of carbon is assimilated. Thus the growth is:

Growth in kg = [Fish respiration] * 2.64*10^(-8)

The initial fish stock was 0.076 kg corresponding to 20 goldfish with an average mass of 3.8 grams as described in Fry and Hart (2007).

The factors was set values similar to those expected in North African aquaculture.

Oxygen concentration & cichlid respiration

The initial oxygen concentration in the aquarium were ~245.5 µmol/L, but drops to about 238 µmol/L within five hours. From 5 hrs to the end of the experiment there is a slight drop to 230.5 µmol/L.

The initial fish stock respiration were 3693 µmol/hr and increased to 7645 µmol/hr after six months. 

A flow rate of 500 L/hr seems appropriate for a runtime of six months as the small decrease in oxygen concentration most likely won't affect the fish.

Fish stock

The initial fish stock were 0.576 kg, corresponding to 24 tilapia cichlids of 24 g. After six months the fish stock is at 1.201 kg, which is an increase of 208.5%. However, I would recommend that a company should more and larger tanks, as 1.201 kg of fish after six months of work does not seem profitable.

When determining the km value the variables were kept specific values, as described below. Afterwards the water temperature and other variables were changes to values more resembling North Africa. These setting are described below, but can also be adjusted using the sliders below the info box.

The model contains factors such as fish growth, temperature, Km, water flow and aquarium size. The weight-specific fish respiration is determined by water temperature and Km value.

When looking at the oxygen concentration (µmol/L) as a function og time (hrs), the Km value was estimated to 40 µmol.

Wet fish biomass consists of 45% carbon, 10% nitrogen, 1.5% phosphor, 1.5% minerals and 43% water. As one mole of carbon weighs 12 grams, is is associated with 26.7 grams of fish biomass. This means that for every one mole of carbon the fish stock assimilate, 26.7 grams biomass is gained. 

For determining the growth rate it is  assumed that for every mole of oxygen is respired, one mole of carbon is assimilated. Thus the growth is:

Growth in kg = [Fish respiration] * 2.64*10^(-8)

The initial fish stock was 0.076 kg corresponding to 20 goldfish with an average mass of 3.8 grams as described in Fry and Hart (2007).

The factors was set values similar to those expected in North African aquaculture.

Oxygen concentration & cichlid respiration

The initial oxygen concentration in the aquarium were ~245.5 µmol/L, but drops to about 238 µmol/L within five hours. From 5 hrs to the end of the experiment there is a slight drop to 230.5 µmol/L.

The initial fish stock respiration were 3693 µmol/hr and increased to 7645 µmol/hr after six months. 

A flow rate of 500 L/hr seems appropriate for a runtime of six months as the small decrease in oxygen concentration most likely won't affect the fish.

Fish stock

The initial fish stock were 0.576 kg, corresponding to 24 tilapia cichlids of 24 g. After six months the fish stock is at 1.201 kg, which is an increase of 208.5%. However, I would recommend that a company should more and larger tanks, as 1.201 kg of fish after six months of work does not seem profitable.

When determining the km value the variables were kept specific values, as described below. Afterwards the water temperature and other variables were changes to values more resembling North Africa. These setting are described below, but can also be adjusted using the sliders below the info box.

The model contains factors such as fish growth, temperature, Km, water flow and aquarium size. The weight-specific fish respiration is determined by water temperature and Km value.

When looking at the oxygen concentration (µmol/L) as a function og time (hrs), the Km value was estimated to 40 µmol.

Wet fish biomass consists of 45% carbon, 10% nitrogen, 1.5% phosphor, 1.5% minerals and 43% water. As one mole of carbon weighs 12 grams, is is associated with 26.7 grams of fish biomass. This means that for every one mole of carbon the fish stock assimilate, 26.7 grams biomass is gained. 

For determining the growth rate it is  assumed that for every mole of oxygen is respired, one mole of carbon is assimilated. Thus the growth is:

Growth in kg = [Fish respiration] * 2.64*10^(-8)

The initial fish stock was 0.076 kg corresponding to 20 goldfish with an average mass of 3.8 grams as described in Fry and Hart (2007).

The factors was set values similar to those expected in North African aquaculture.

Oxygen concentration & cichlid respiration

The initial oxygen concentration in the aquarium were ~245.5 µmol/L, but drops to about 238 µmol/L within five hours. From 5 hrs to the end of the experiment there is a slight drop to 230.5 µmol/L.

The initial fish stock respiration were 3693 µmol/hr and increased to 7645 µmol/hr after six months. 

A flow rate of 500 L/hr seems appropriate for a runtime of six months as the small decrease in oxygen concentration most likely won't affect the fish.

Fish stock

The initial fish stock were 0.576 kg, corresponding to 24 tilapia cichlids of 24 g. After six months the fish stock is at 1.201 kg, which is an increase of 208.5%. However, I would recommend that a company should more and larger tanks, as 1.201 kg of fish after six months of work does not seem profitable.

The temperature is kept at 15C throughout the run-time of 4380hrs. In this model the Respiration is dependant on the water temperature, the total fish mass and Km to oxygen.

The model also contain fish growth. 

When the fish assimilate one mole of carbon it gains 26.4 grams. It is assumed in the model that for every mole of oxygen is respired, one mole of carbon is assimilated. The initial fish stock was 0.08kg.

When determining the km value the variables were kept specific values, as described below. Afterwards the water temperature and other variables were changes to values more resembling North Africa. These setting are described below, but can also be adjusted using the sliders below the info box.

The model contains factors such as fish growth, temperature, Km, water flow and aquarium size. The weight-specific fish respiration is determined by water temperature and Km value.

When looking at the oxygen concentration (µmol/L) as a function og time (hrs), the Km value was estimated to 40 µmol.

Wet fish biomass consists of 45% carbon, 10% nitrogen, 1.5% phosphor, 1.5% minerals and 43% water. As one mole of carbon weighs 12 grams, is is associated with 26.7 grams of fish biomass. This means that for every one mole of carbon the fish stock assimilate, 26.7 grams biomass is gained. 

For determining the growth rate it is  assumed that for every mole of oxygen is respired, one mole of carbon is assimilated. Thus the growth is:

Growth in kg = [Fish respiration] * 2.64*10^(-8)

The initial fish stock was 0.076 kg corresponding to 20 goldfish with an average mass of 3.8 grams as described in Fry and Hart (2007).

The factors was set values similar to those expected in North African aquaculture.

Oxygen concentration & cichlid respiration

The initial oxygen concentration in the aquarium were ~245.5 µmol/L, but drops to about 238 µmol/L within five hours. From 5 hrs to the end of the experiment there is a slight drop to 230.5 µmol/L.

The initial fish stock respiration were 3693 µmol/hr and increased to 7645 µmol/hr after six months. 

A flow rate of 500 L/hr seems appropriate for a runtime of six months as the small decrease in oxygen concentration most likely won't affect the fish.

Fish stock

The initial fish stock were 0.576 kg, corresponding to 24 tilapia cichlids of 24 g. After six months the fish stock is at 1.201 kg, which is an increase of 208.5%. However, I would recommend that a company should more and larger tanks, as 1.201 kg of fish after six months of work does not seem profitable.

When determining the km value the variables were kept specific values, as described below. Afterwards the water temperature and other variables were changes to values more resembling North Africa. These setting are described below, but can also be adjusted using the sliders below the info box.

The model contains factors such as fish growth, temperature, Km, water flow and aquarium size. The weight-specific fish respiration is determined by water temperature and Km value.

When looking at the oxygen concentration (µmol/L) as a function og time (hrs), the Km value was estimated to 40 µmol.

Wet fish biomass consists of 45% carbon, 10% nitrogen, 1.5% phosphor, 1.5% minerals and 43% water. As one mole of carbon weighs 12 grams, is is associated with 26.7 grams of fish biomass. This means that for every one mole of carbon the fish stock assimilate, 26.7 grams biomass is gained. 

For determining the growth rate it is  assumed that for every mole of oxygen is respired, one mole of carbon is assimilated. Thus the growth is:

Growth in kg = [Fish respiration] * 2.64*10^(-8)

The initial fish stock was 0.076 kg corresponding to 20 goldfish with an average mass of 3.8 grams as described in Fry and Hart (2007).

The factors was set values similar to those expected in North African aquaculture.

Oxygen concentration & cichlid respiration

The initial oxygen concentration in the aquarium were ~245.5 µmol/L, but drops to about 238 µmol/L within five hours. From 5 hrs to the end of the experiment there is a slight drop to 230.5 µmol/L.

The initial fish stock respiration were 3693 µmol/hr and increased to 7645 µmol/hr after six months. 

A flow rate of 500 L/hr seems appropriate for a runtime of six months as the small decrease in oxygen concentration most likely won't affect the fish.

Fish stock

The initial fish stock were 0.576 kg, corresponding to 24 tilapia cichlids of 24 g. After six months the fish stock is at 1.201 kg, which is an increase of 208.5%. However, I would recommend that a company should more and larger tanks, as 1.201 kg of fish after six months of work does not seem profitable.

When determining the km value the variables were kept specific values, as described below. Afterwards the water temperature and other variables were changes to values more resembling North Africa. These setting are described below, but can also be adjusted using the sliders below the info box.

The model contains factors such as fish growth, temperature, Km, water flow and aquarium size. The weight-specific fish respiration is determined by water temperature and Km value.

When looking at the oxygen concentration (µmol/L) as a function og time (hrs), the Km value was estimated to 40 µmol.

Wet fish biomass consists of 45% carbon, 10% nitrogen, 1.5% phosphor, 1.5% minerals and 43% water. As one mole of carbon weighs 12 grams, is is associated with 26.7 grams of fish biomass. This means that for every one mole of carbon the fish stock assimilate, 26.7 grams biomass is gained. 

For determining the growth rate it is  assumed that for every mole of oxygen is respired, one mole of carbon is assimilated. Thus the growth is:

Growth in kg = [Fish respiration] * 2.64*10^(-8)

The initial fish stock was 0.076 kg corresponding to 20 goldfish with an average mass of 3.8 grams as described in Fry and Hart (2007).

The factors was set values similar to those expected in North African aquaculture.

Oxygen concentration & cichlid respiration

The initial oxygen concentration in the aquarium were ~245.5 µmol/L, but drops to about 238 µmol/L within five hours. From 5 hrs to the end of the experiment there is a slight drop to 230.5 µmol/L.

The initial fish stock respiration were 3693 µmol/hr and increased to 7645 µmol/hr after six months. 

A flow rate of 500 L/hr seems appropriate for a runtime of six months as the small decrease in oxygen concentration most likely won't affect the fish.

Fish stock

The initial fish stock were 0.576 kg, corresponding to 24 tilapia cichlids of 24 g. After six months the fish stock is at 1.201 kg, which is an increase of 208.5%. However, I would recommend that a company should more and larger tanks, as 1.201 kg of fish after six months of work does not seem profitable.

When determining the km value the variables were kept specific values, as described below. Afterwards the water temperature and other variables were changes to values more resembling North Africa. These setting are described below, but can also be adjusted using the sliders below the info box.

The model contains factors such as fish growth, temperature, Km, water flow and aquarium size. The weight-specific fish respiration is determined by water temperature and Km value.

When looking at the oxygen concentration (µmol/L) as a function og time (hrs), the Km value was estimated to 40 µmol.

Wet fish biomass consists of 45% carbon, 10% nitrogen, 1.5% phosphor, 1.5% minerals and 43% water. As one mole of carbon weighs 12 grams, is is associated with 26.7 grams of fish biomass. This means that for every one mole of carbon the fish stock assimilate, 26.7 grams biomass is gained. 

For determining the growth rate it is  assumed that for every mole of oxygen is respired, one mole of carbon is assimilated. Thus the growth is:

Growth in kg = [Fish respiration] * 2.64*10^(-8)

The initial fish stock was 0.076 kg corresponding to 20 goldfish with an average mass of 3.8 grams as described in Fry and Hart (2007).

The factors was set values similar to those expected in North African aquaculture.

Oxygen concentration & cichlid respiration

The initial oxygen concentration in the aquarium were ~245.5 µmol/L, but drops to about 238 µmol/L within five hours. From 5 hrs to the end of the experiment there is a slight drop to 230.5 µmol/L.

The initial fish stock respiration were 3693 µmol/hr and increased to 7645 µmol/hr after six months. 

A flow rate of 500 L/hr seems appropriate for a runtime of six months as the small decrease in oxygen concentration most likely won't affect the fish.

Fish stock

The initial fish stock were 0.576 kg, corresponding to 24 tilapia cichlids of 24 g. After six months the fish stock is at 1.201 kg, which is an increase of 208.5%. However, I would recommend that a company should more and larger tanks, as 1.201 kg of fish after six months of work does not seem profitable.

When determining the km value the variables were kept specific values, as described below. Afterwards the water temperature and other variables were changes to values more resembling North Africa. These setting are described below, but can also be adjusted using the sliders below the info box.

The model contains factors such as fish growth, temperature, Km, water flow and aquarium size. The weight-specific fish respiration is determined by water temperature and Km value.

When looking at the oxygen concentration (µmol/L) as a function og time (hrs), the Km value was estimated to 40 µmol.

Wet fish biomass consists of 45% carbon, 10% nitrogen, 1.5% phosphor, 1.5% minerals and 43% water. As one mole of carbon weighs 12 grams, is is associated with 26.7 grams of fish biomass. This means that for every one mole of carbon the fish stock assimilate, 26.7 grams biomass is gained. 

For determining the growth rate it is  assumed that for every mole of oxygen is respired, one mole of carbon is assimilated. Thus the growth is:

Growth in kg = [Fish respiration] * 2.64*10^(-8)

The initial fish stock was 0.076 kg corresponding to 20 goldfish with an average mass of 3.8 grams as described in Fry and Hart (2007).

The factors was set values similar to those expected in North African aquaculture.

Oxygen concentration & cichlid respiration

The initial oxygen concentration in the aquarium were ~245.5 µmol/L, but drops to about 238 µmol/L within five hours. From 5 hrs to the end of the experiment there is a slight drop to 230.5 µmol/L.

The initial fish stock respiration were 3693 µmol/hr and increased to 7645 µmol/hr after six months. 

A flow rate of 500 L/hr seems appropriate for a runtime of six months as the small decrease in oxygen concentration most likely won't affect the fish.

Fish stock

The initial fish stock were 0.576 kg, corresponding to 24 tilapia cichlids of 24 g. After six months the fish stock is at 1.201 kg, which is an increase of 208.5%. However, I would recommend that a company should more and larger tanks, as 1.201 kg of fish after six months of work does not seem profitable.

When determining the km value the variables were kept specific values, as described below. Afterwards the water temperature and other variables were changes to values more resembling North Africa. These setting are described below, but can also be adjusted using the sliders below the info box.

The model contains factors such as fish growth, temperature, Km, water flow and aquarium size. The weight-specific fish respiration is determined by water temperature and Km value.

When looking at the oxygen concentration (µmol/L) as a function og time (hrs), the Km value was estimated to 40 µmol.

Wet fish biomass consists of 45% carbon, 10% nitrogen, 1.5% phosphor, 1.5% minerals and 43% water. As one mole of carbon weighs 12 grams, is is associated with 26.7 grams of fish biomass. This means that for every one mole of carbon the fish stock assimilate, 26.7 grams biomass is gained. 

For determining the growth rate it is  assumed that for every mole of oxygen is respired, one mole of carbon is assimilated. Thus the growth is:

Growth in kg = [Fish respiration] * 2.64*10^(-8)

The initial fish stock was 0.076 kg corresponding to 20 goldfish with an average mass of 3.8 grams as described in Fry and Hart (2007).

The factors was set values similar to those expected in North African aquaculture.

Oxygen concentration & cichlid respiration

The initial oxygen concentration in the aquarium were ~245.5 µmol/L, but drops to about 238 µmol/L within five hours. From 5 hrs to the end of the experiment there is a slight drop to 230.5 µmol/L.

The initial fish stock respiration were 3693 µmol/hr and increased to 7645 µmol/hr after six months. 

A flow rate of 500 L/hr seems appropriate for a runtime of six months as the small decrease in oxygen concentration most likely won't affect the fish.

Fish stock

The initial fish stock were 0.576 kg, corresponding to 24 tilapia cichlids of 24 g. After six months the fish stock is at 1.201 kg, which is an increase of 208.5%. However, I would recommend that a company should more and larger tanks, as 1.201 kg of fish after six months of work does not seem profitable.

When determining the km value the variables were kept specific values, as described below. Afterwards the water temperature and other variables were changes to values more resembling North Africa. These setting are described below, but can also be adjusted using the sliders below the info box.

The model contains factors such as fish growth, temperature, Km, water flow and aquarium size. The weight-specific fish respiration is determined by water temperature and Km value.

When looking at the oxygen concentration (µmol/L) as a function og time (hrs), the Km value was estimated to 40 µmol.

Wet fish biomass consists of 45% carbon, 10% nitrogen, 1.5% phosphor, 1.5% minerals and 43% water. As one mole of carbon weighs 12 grams, is is associated with 26.7 grams of fish biomass. This means that for every one mole of carbon the fish stock assimilate, 26.7 grams biomass is gained. 

For determining the growth rate it is  assumed that for every mole of oxygen is respired, one mole of carbon is assimilated. Thus the growth is:

Growth in kg = [Fish respiration] * 2.64*10^(-8)

The initial fish stock was 0.076 kg corresponding to 20 goldfish with an average mass of 3.8 grams as described in Fry and Hart (2007).

The factors was set values similar to those expected in North African aquaculture.

Oxygen concentration & cichlid respiration

The initial oxygen concentration in the aquarium were ~245.5 µmol/L, but drops to about 238 µmol/L within five hours. From 5 hrs to the end of the experiment there is a slight drop to 230.5 µmol/L.

The initial fish stock respiration were 3693 µmol/hr and increased to 7645 µmol/hr after six months. 

A flow rate of 500 L/hr seems appropriate for a runtime of six months as the small decrease in oxygen concentration most likely won't affect the fish.

Fish stock

The initial fish stock were 0.576 kg, corresponding to 24 tilapia cichlids of 24 g. After six months the fish stock is at 1.201 kg, which is an increase of 208.5%. However, I would recommend that a company should more and larger tanks, as 1.201 kg of fish after six months of work does not seem profitable.

When determining the km value the variables were kept specific values, as described below. Afterwards the water temperature and other variables were changes to values more resembling North Africa. These setting are described below, but can also be adjusted using the sliders below the info box.

The model contains factors such as fish growth, temperature, Km, water flow and aquarium size. The weight-specific fish respiration is determined by water temperature and Km value.

When looking at the oxygen concentration (µmol/L) as a function og time (hrs), the Km value was estimated to 40 µmol.

Wet fish biomass consists of 45% carbon, 10% nitrogen, 1.5% phosphor, 1.5% minerals and 43% water. As one mole of carbon weighs 12 grams, is is associated with 26.7 grams of fish biomass. This means that for every one mole of carbon the fish stock assimilate, 26.7 grams biomass is gained. 

For determining the growth rate it is  assumed that for every mole of oxygen is respired, one mole of carbon is assimilated. Thus the growth is:

Growth in kg = [Fish respiration] * 2.64*10^(-8)

The initial fish stock was 0.076 kg corresponding to 20 goldfish with an average mass of 3.8 grams as described in Fry and Hart (2007).

The factors was set values similar to those expected in North African aquaculture.

Oxygen concentration & cichlid respiration

The initial oxygen concentration in the aquarium were ~245.5 µmol/L, but drops to about 238 µmol/L within five hours. From 5 hrs to the end of the experiment there is a slight drop to 230.5 µmol/L.

The initial fish stock respiration were 3693 µmol/hr and increased to 7645 µmol/hr after six months. 

A flow rate of 500 L/hr seems appropriate for a runtime of six months as the small decrease in oxygen concentration most likely won't affect the fish.

Fish stock

The initial fish stock were 0.576 kg, corresponding to 24 tilapia cichlids of 24 g. After six months the fish stock is at 1.201 kg, which is an increase of 208.5%. However, I would recommend that a company should more and larger tanks, as 1.201 kg of fish after six months of work does not seem profitable.

Okay, der er vist opstået nogle problemer med modellen. Kan ikke umiddelbart bestemme Km under de nuværende betingelser (som beskrevet i artiklen). Hvis jeg køre modellen over fire timer, kan jeg ikke se knækket selvom jeg bruger en Km fra 1 til 1200. Kan ikke se hvor modellen går galt.

Hvis jeg køre modellen over 15 timer, får jeg noget der ligner fig. 3. Det giver mig Km på 40

Endvidere, så fungere væksten ikke.

When determining the km value the variables were kept specific values, as described below. Afterwards the water temperature and other variables were changes to values more resembling North Africa. These setting are described below, but can also be adjusted using the sliders below the info box.

The model contains factors such as fish growth, temperature, Km, water flow and aquarium size. The weight-specific fish respiration is determined by water temperature and Km value.

Temp.: 15 degrees celcius

Aquarium volume: 4 liters

Fish stock: 0.076 kg (20 x 3.8 g)

Run time: 4 hrs

Flow: 0 L/hr (off)

Fish growth: 0 (off)

Wet fish biomass consists of 45% carbon, 10% nitrogen, 1.5% phosphor, 1.5% minerals and 43% water. As one mole of carbon weighs 12 grams, is is associated with 26.7 grams of fish biomass. This means that for every one mole of carbon the fish stock assimilate, 26.7 grams biomass is gained. 

For determining the growth rate it is  assumed that for every mole of oxygen is respired, one mole of carbon is assimilated. Thus the growth is:

Growth in kg = [Fish respiration] * 2.64*10^(-8)

The initial fish stock was 0.076 kg corresponding to 20 goldfish with an average mass of 3.8 grams as described in Fry and Hart (2007).

 

When determining the km value the variables were kept specific values, as described below. Afterwards the water temperature and other variables were changes to values more resembling North Africa. These setting are described below, but can also be adjusted using the sliders below the info box.

The model contains factors such as fish growth, temperature, Km, water flow and aquarium size. The weight-specific fish respiration is determined by water temperature and Km value.

When looking at the oxygen concentration (µmol/L) as a function og time (hrs), the Km value was estimated to 40 µmol.

Wet fish biomass consists of 45% carbon, 10% nitrogen, 1.5% phosphor, 1.5% minerals and 43% water. As one mole of carbon weighs 12 grams, is is associated with 26.7 grams of fish biomass. This means that for every one mole of carbon the fish stock assimilate, 26.7 grams biomass is gained. 

For determining the growth rate it is  assumed that for every mole of oxygen is respired, one mole of carbon is assimilated. Thus the growth is:

Growth in kg = [Fish respiration] * 2.64*10^(-8)

The initial fish stock was 0.076 kg corresponding to 20 goldfish with an average mass of 3.8 grams as described in Fry and Hart (2007).

The factors was set values similar to those expected in North African aquaculture.

Oxygen concentration & cichlid respiration

The initial oxygen concentration in the aquarium were ~245.5 µmol/L, but drops to about 238 µmol/L within five hours. From 5 hrs to the end of the experiment there is a slight drop to 230.5 µmol/L.

The initial fish stock respiration were 3693 µmol/hr and increased to 7645 µmol/hr after six months. 

A flow rate of 500 L/hr seems appropriate for a runtime of six months as the small decrease in oxygen concentration most likely won't affect the fish.

Fish stock

The initial fish stock were 0.576 kg, corresponding to 24 tilapia cichlids of 24 g. After six months the fish stock is at 1.201 kg, which is an increase of 208.5%. However, I would recommend that a company should more and larger tanks, as 1.201 kg of fish after six months of work does not seem profitable.

When determining the km value the variables were kept specific values, as described below. Afterwards the water temperature and other variables were changes to values more resembling North Africa. These setting are described below, but can also be adjusted using the sliders below the info box.

The model contains factors such as fish growth, temperature, Km, water flow and aquarium size. The weight-specific fish respiration is determined by water temperature and Km value.

When looking at the oxygen concentration (µmol/L) as a function og time (hrs), the Km value was estimated to 40 µmol.

Wet fish biomass consists of 45% carbon, 10% nitrogen, 1.5% phosphor, 1.5% minerals and 43% water. As one mole of carbon weighs 12 grams, is is associated with 26.7 grams of fish biomass. This means that for every one mole of carbon the fish stock assimilate, 26.7 grams biomass is gained. 

For determining the growth rate it is  assumed that for every mole of oxygen is respired, one mole of carbon is assimilated. Thus the growth is:

Growth in kg = [Fish respiration] * 2.64*10^(-8)

The initial fish stock was 0.076 kg corresponding to 20 goldfish with an average mass of 3.8 grams as described in Fry and Hart (2007).

The factors was set values similar to those expected in North African aquaculture.

Oxygen concentration & cichlid respiration

The initial oxygen concentration in the aquarium were ~245.5 µmol/L, but drops to about 238 µmol/L within five hours. From 5 hrs to the end of the experiment there is a slight drop to 230.5 µmol/L.

The initial fish stock respiration were 3693 µmol/hr and increased to 7645 µmol/hr after six months. 

A flow rate of 500 L/hr seems appropriate for a runtime of six months as the small decrease in oxygen concentration most likely won't affect the fish.

Fish stock

The initial fish stock were 0.576 kg, corresponding to 24 tilapia cichlids of 24 g. After six months the fish stock is at 1.201 kg, which is an increase of 208.5%. However, I would recommend that a company should more and larger tanks, as 1.201 kg of fish after six months of work does not seem profitable.

When determining the km value the variables were kept specific values, as described below. Afterwards the water temperature and other variables were changes to values more resembling North Africa. These setting are described below, but can also be adjusted using the sliders below the info box.

The model contains factors such as fish growth, temperature, Km, water flow and aquarium size. The weight-specific fish respiration is determined by water temperature and Km value.

When looking at the oxygen concentration (µmol/L) as a function og time (hrs), the Km value was estimated to 40 µmol.

Wet fish biomass consists of 45% carbon, 10% nitrogen, 1.5% phosphor, 1.5% minerals and 43% water. As one mole of carbon weighs 12 grams, is is associated with 26.7 grams of fish biomass. This means that for every one mole of carbon the fish stock assimilate, 26.7 grams biomass is gained. 

For determining the growth rate it is  assumed that for every mole of oxygen is respired, one mole of carbon is assimilated. Thus the growth is:

Growth in kg = [Fish respiration] * 2.64*10^(-8)

The initial fish stock was 0.076 kg corresponding to 20 goldfish with an average mass of 3.8 grams as described in Fry and Hart (2007).

The factors was set values similar to those expected in North African aquaculture.

Oxygen concentration & cichlid respiration

The initial oxygen concentration in the aquarium were ~245.5 µmol/L, but drops to about 238 µmol/L within five hours. From 5 hrs to the end of the experiment there is a slight drop to 230.5 µmol/L.

The initial fish stock respiration were 3693 µmol/hr and increased to 7645 µmol/hr after six months. 

A flow rate of 500 L/hr seems appropriate for a runtime of six months as the small decrease in oxygen concentration most likely won't affect the fish.

Fish stock

The initial fish stock were 0.576 kg, corresponding to 24 tilapia cichlids of 24 g. After six months the fish stock is at 1.201 kg, which is an increase of 208.5%. However, I would recommend that a company should more and larger tanks, as 1.201 kg of fish after six months of work does not seem profitable.

When determining the km value the variables were kept specific values, as described below. Afterwards the water temperature and other variables were changes to values more resembling North Africa. These setting are described below, but can also be adjusted using the sliders below the info box.

The model contains factors such as fish growth, temperature, Km, water flow and aquarium size. The weight-specific fish respiration is determined by water temperature and Km value.

When looking at the oxygen concentration (µmol/L) as a function og time (hrs), the Km value was estimated to 40 µmol.

Wet fish biomass consists of 45% carbon, 10% nitrogen, 1.5% phosphor, 1.5% minerals and 43% water. As one mole of carbon weighs 12 grams, is is associated with 26.7 grams of fish biomass. This means that for every one mole of carbon the fish stock assimilate, 26.7 grams biomass is gained. 

For determining the growth rate it is  assumed that for every mole of oxygen is respired, one mole of carbon is assimilated. Thus the growth is:

Growth in kg = [Fish respiration] * 2.64*10^(-8)

The initial fish stock was 0.076 kg corresponding to 20 goldfish with an average mass of 3.8 grams as described in Fry and Hart (2007).

The factors was set values similar to those expected in North African aquaculture.

Oxygen concentration & cichlid respiration

The initial oxygen concentration in the aquarium were ~245.5 µmol/L, but drops to about 238 µmol/L within five hours. From 5 hrs to the end of the experiment there is a slight drop to 230.5 µmol/L.

The initial fish stock respiration were 3693 µmol/hr and increased to 7645 µmol/hr after six months. 

A flow rate of 500 L/hr seems appropriate for a runtime of six months as the small decrease in oxygen concentration most likely won't affect the fish.

Fish stock

The initial fish stock were 0.576 kg, corresponding to 24 tilapia cichlids of 24 g. After six months the fish stock is at 1.201 kg, which is an increase of 208.5%. However, I would recommend that a company should more and larger tanks, as 1.201 kg of fish after six months of work does not seem profitable.