It is believed the major roles of fisheries biologists are to identify/describe the distributions and abundance of resources and their variations in time and space as well as estimate the harvest that each resource or group of resources can sustain and understand the effects of man's activities upon supply. Japan is an example of a country that has solved its animal source protein problem by utilizing fish caught in all waters of the planet. The Japanese are making the best use of most edible portions of marine species, from the jelly fish to the tuna, and processing this marine food in a variety of ways.