The chief limiting factor to the success of most trout species is a. the ability to reproduce. b. the dissolved oxygen content in water. c. the amount of plant biomass. d. All of these are correct.

the answer to your question is b

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.