m86.    How can water help feed us?

About 80% of the commercial catch of fish and shellfish per year comes from the oceans (rather than from farms). About 40 of the 20,000 species of fish are harvested. The total fish catch has grown, but the per capita fish catch has decreased because of human population growth. Over-fishing leaves too little breeding stock. Aquaculture supplies about 10% of the fish and shellfish crop. About 40% of the oysters, most of the catfish, crayfish and rainbow trout are raised on farms.  

e01.    What is biodiversity?

e07.    What is the Wild and Scenic River System?

e14.    What are the basic components of life?

e17.    How do organisms use matter?

e18.    Does water recover from pollution?

e22.    What do we eat? 

g25.    What are the properties of water?