D 1. What is the biggest problem associated with the introduction of the invasive species, Zebra Mussels, in the Great Lakes? They increase the purity of the lake water, They produce fatter and faster growing salmon. They consume small amounts of algae. They clog up factory intake pipes.​

answer: 20 percent

the fish culture has become a developing commercial practice in developing countries which is already prominent in developed countries of the world. the major fish protein demand is being supplemented in developing countries is   fishing to meet the needs of the growing population. therefore, in some developing nations, the percentage of animal protein from fish in the diet can be as high as 20 percent.