Background information:
Breathing:
They breathe oxygen through gills. Gills are respiratory organs found in aquatic organisms, which allow the Yabby to remove the oxygen from the water for respiration. Each leg has a gill attached, with the movement of the legs helping the circulation of water over these gills. There is a thin layer of exoskeleton separating the gills from the body cavity, allowing water to cover the gills without getting inside the body.
Digestion:
Digestive track includes mouth, oesophagus, stomach, intestine and anus. It has two stomachs - The cardiac stomach is where the food is stored, where as the pyloric stomach is where most of the digestion occurs. It churns the food for mechanical digestion and uses digestive glands located either side of the stomach, producing digestive enzymes for chemical digestion. The food then passes through the antennal gland, which is the main excretory organ. …show more content…
The heart functions similarly to the heart of humans, by pumping blood around the body. However, yabbies have no veins. Instead, the blood flows from arteries to capillaries and then into tissue space called sinuses which function as the veins.
Aim: The aim of this investigation was to measure the effect different diets had on the weight and length of yabbies. There were three different diets which included; fruit and vegetables, commercial pellets and colour enhancing fillets which all effects the yabbies differently.
Hypothesis: Tank 1 - The weight and size of the yabbies will stay consistent when following the diet of fruit and vegetables Tank 2 - The weight and size of the yabbies will increase when following the diet of the commercial
Breathing:
They breathe oxygen through gills. Gills are respiratory organs found in aquatic organisms, which allow the Yabby to remove the oxygen from the water for respiration. Each leg has a gill attached, with the movement of the legs helping the circulation of water over these gills. There is a thin layer of exoskeleton separating the gills from the body cavity, allowing water to cover the gills without getting inside the body.
Digestion:
Digestive track includes mouth, oesophagus, stomach, intestine and anus. It has two stomachs - The cardiac stomach is where the food is stored, where as the pyloric stomach is where most of the digestion occurs. It churns the food for mechanical digestion and uses digestive glands located either side of the stomach, producing digestive enzymes for chemical digestion. The food then passes through the antennal gland, which is the main excretory organ. …show more content…
The heart functions similarly to the heart of humans, by pumping blood around the body. However, yabbies have no veins. Instead, the blood flows from arteries to capillaries and then into tissue space called sinuses which function as the veins.
Aim: The aim of this investigation was to measure the effect different diets had on the weight and length of yabbies. There were three different diets which included; fruit and vegetables, commercial pellets and colour enhancing fillets which all effects the yabbies differently.
Hypothesis: Tank 1 - The weight and size of the yabbies will stay consistent when following the diet of fruit and vegetables Tank 2 - The weight and size of the yabbies will increase when following the diet of the commercial