From:
www.insectsarefood.com
According to the Entomological Society of America insects generally contain more protein and are lower in fat than traditional meats. In addition they have about 20 times higher food conversion efficiency than traditional meats. In other words they have a better feed-to-meat ratio than beef, pork, lamb or chicken.
It can best be understood at least in part with a comparative breakdown of cricket to beef. 100 grams of cricket contains 121 calories, 12.9 grams of protein, 5.5 g. fat, 5.1 g. carbohydrates, 75.8 mg. calcium, 9.5 mg. iron, 3.10 mg. niacin, 1.09 mg. riboflavin, 185.3 mg. phosphorous, and 0.36 mg. thiamine. By comparison ground beef contains more protein (23.5 g./100g.), but also has 288.2 calories, almost three times the amount of crickets, and a whopping 21.2 grams of fat, almost four times the amount of crickets!
Insects are exothermic, which means they get their heat from the surrounding environment, while birds and mammals are endothermic, which means they have to heat themselves up, requiring lots of energy and consequently a major impact on the environment and on natural resources. The big advantage to being exothermic in this respect is that insects save a huge amount of energy.
And comparatively speaking, being able to survive on a fifth of the amount of food required of familiar livestock is a major advantage when considering the impact of our footprint on the environment. Farming insects as miniature livestock is a smarter, more efficient and ultimately environmentally safer means of sustaining a healthy and convenient food supply.
Insects reproduce at a much quicker rate than cattle, are much easier to raise and need far less living space and are able to feed off of much less feed than traditional livestock require.
According to the University of Ohio’s Department of Entomology Fact Sheet Findings, if Americans could tolerate more insects in what they eat, farmers could significantly reduce the amount of pesticides applied each year. It’s also important to note that in farming and raising insects, there would be no labor intensive butchering of animals, no back-breaking farm work, no need for tractors, and no need for veterinary bills.