The+Murray+River+-+Mark

I am doing this on my own and my big question is : why has the drought affected the fish in the murray river? to find the answer to this I am focusing the murray cod and what it eats what parts of the murray it lives in. How will the draught affect what it eats? How the draught has affected the numbers so far and find out how the draught has affected the other animals by making a food web. so far I have found out what lives in the murray river, a little bit about the murray cod, what are some of the causes of the fish dying and a little bit of what has the draught affected so far. overgrown murray codsome things affecting the Murray River fish are the lack of water and introduced fish e.g. the carp which when large has no predators.