Insects as feed are insect species used as animal feed, either for livestock, including aquaculture, or as pet food.
As livestock feed production uses ~33% of the world's agricultural cropland use, insects might be able to supplement livestock feed. They can transform low-value organic wastes, are nutritious and have low environmental impacts. [1]
Due to their nutritional profile, especially the high protein content, various types of insects can be used as feed for industrial animal production and aquaculture. An insect-based diet for farm animals has been scientifically investigated for pigs, poultry and edible fish. Insects can provide as much protein and essential amino acids for swine and poultry that can potentially replace soybean meal in a diet. [2] Inclusion of black soldier fly larvae in a diet for fish farming gave positive effect with no difference in odor and texture. [3] At the same time, there are challenges and disadvantages compared to established feed in terms of performance and growth. For monogastric farm animals, such as swine and poultry, replacing their conventional formula entirely with insects can result to decrease in performance and growth e.g., because insect flour may contain high levels of ash. [4] However other research suggests that animals fed insect protein from black-soldier flies, achieved faster growth rates and better-quality meat than with soya or fishmeal. [5] Insects as feed are legally considered farm animals themselves, therefore they must not receive feed from ruminant proteins, kitchen and food waste, meat and bone meal and liquid manure.
With a view to protecting the environment and resources as well as feed and food security in the face of a growing world population, the UN Food and Agriculture Organization (FAO) has called for increased use of feed insects for feed production. [6]
Black-soldier flies, common house fly larvae and mealworms are some of the most common insects in animal feed production. Black soldier flies and common house flies often reside in manure piles and in organic wastes. Farming these insects could promote better manure and organic waste management, while providing nutritious feed ingredient to pets and livestock. [7]
Aside from nutritional composition and digestibility, insects are also selected for ease of rearing by the producer. A study compared insect species regarding their suitability as feed material, investigating their development time, survival rate, efficiency of converting base feed into insect biomass (FCR), dry matter conversion rate (ECI), and nitrogen efficiency (N-ECI). [8] In the table, values indicate the mean ± one standard deviation, and superscripts indicate significant differences.
Sample Size | n | Diet | Survival rate | Development time (days) | FCR | ECI | N-ECI |
---|---|---|---|---|---|---|---|
Argentinian Cockroach | 6 | HPHF | 80±17.9a | 200±28.8c | 1.7±0.24c | 21±3.0b | 58±8.3b |
6 | HPLF | 47±16.3b | 294±33.5a | 2.3±0.35ab | 16±2.7bc | 51±8.7b | |
6 | LPHF | 53±13.2ab | 266±29.3ab | 1.5±0.19c | 30±3.9a | 87±11.4a | |
6 | LPLF | 51±12.2ab | 237±14.9bc | 1.7±0.15bc | 18±1.9bc | 66±6.7b | |
6 | Control | 75±21.7ab | 211±18.7c | 2.7±0.47a | 14±2.1c | 52±8.1b | |
Black Soldier Fly | 6 | HPHF | 86±18.0 | 21±1.4c | 1.4±0.12 | 24±1.5 | 51±3.2 |
6 | HPLF | 77±19.8 | 33±5.4ab | 1.9±0.20 | 20±1.3 | 51±32.5 | |
6 | LPHF | 72±12.9 | 37±10.6a | 2.3±0.56 | 18±4.8 | 55±14.6 | |
5 | LPLF | 74±23.5 | 37±5.8a | 2.6±0.85 | 17±5.0 | 43±12.8 | |
6 | Control | 75±31.0 | 21±1.1bc | 1.8±0.71 | 23±5.3 | 52±12.2 | |
Yellow Meal Worm | 6 | HPHF | 79±7.0ab | 116±5.2def | 3.8±0.63c | 12±2.7cdef | 29±6.7cde |
6 | HPLF | 67±12.3bc | 144±13.0cd | 4.1±0.25c | 10±1.0def | 22±2.3e | |
6 | LPHF | 19±7.3e | 191±21.9ab | 5.3±0.81c | 8±0.8ef | 28±2.8de | |
6 | LPLF | 52±9.2cd | 227±26.9a | 6.1±0.62c | 7±1.0f | 23±3.1de | |
6 | Control 1 | 84±9.9ab | 145±9.3cd | 4.8±0.14c | 9±0.2def | 28±0.6cde | |
6 | Control 2 | 34±15.0de | 151±7.8bcd | 4.1±0.49c | 11±1.5cdef | 31±4.2cde | |
6 | HPHF-C | 88±5.4ab | 88±5.1f | 4.5±0.17c | 19±1.6ab | 45±4.5b | |
6 | HPLF-C | 82±6.4ab | 83±6.5f | 5.8±0.48c | 15±0.9bc | 35±2.2bcd | |
6 | LPHF-C | 15±7.4e | 135±17.3cde | 19.1±5.93a | 13±2.7cde | 45±9.2ab | |
6 | LPLF-C | 80±5.6ab | 164±32.9bc | 10.9±0.61b | 13±1.4cde | 41±4.6bc | |
6 | Control 1-C | 93±9.3a | 91±8.5f | 5.5±0.49c | 14±3.3bcd | 45±2.4b | |
6 | Control 2-C | 88±3.1ab | E95±8.0ef | 5.0±0.48c | 21±2.6a | 58±7.3a | |
House cricket | 6 | HPHF | 27±19.0ab | 55±7.3c | 4.5±2.84 | 8±4.9 | 23±13.4b |
1 | HPLF | 6 | 117 | 10 | 3 | - | |
3 | LPHF | 7±3.1b | 167±4.4a | 6.1±1.75 | 5±1.3 | - | |
2 | LPLF | 11±1.4b | 121±2.8b | 3.2±0.69 | 9±2.2 | - | |
6 | Control | 55±11.2a | 48±2.3c | 2.3±0.57 | 12±3.2 | 41±10.8a |
HPHF = high protein, high fat; HPLF = high protein, low fat; LPHF = low protein, high fat; LPLF = low protein, low fat, C= carrot supplementation
In the European Union, the use of seven insect species as feed in aquaculture has been permitted since July 1, 2017: [9]
The inclusion of black soldier flies in the feed of farmed fish had positive results and showed no differences in taste or texture of the fish. [4]
As global populations rise, food demand is becoming an increasingly important issue. Raising conventional livestock requires resources such as land and water. As a result, the ability to meet the needs of the growing population may require alternative sources of quality protein. [10]
Insects also have the ability to feed on organic waste products such as vegetable, restaurant and animal waste, therefore reducing the amount of excess food produced by humans. [11] Insects are efficient at converting feed into protein. [7]
According to two researchers, the "scaling up of production depends on whether cheap organic wastes can be safely used and easily biotransformed into high-quality insect products and whether legislative frameworks are conducive to this approach". [1]
Further challenges include "automation of production techniques, optimization of bioconversion by an efficient interaction between microbes in the insect gut and feed substrate, disease management, making use of the short life cycle of insects to select efficient strains of insects and microbes for certain diets, food safety issues, and processing" as well as "safety of using waste to avoid any pathogen transmission". [1]
The use of insects in feed in the European Union was previously prohibited under an act called "TSE Regulation" (Article 7 and Annex IV of Regulation 999/2001) that bans the use of animal protein in animal feed. In July 2017 this regulation was revised and partially lifts the ban on animal proteins, allowing insects to be included in fish feed.
This was coupled with another change that reclassified insects in the European Union (EU) catalogue of feed materials. This change specifically references to insect fats and insects proteins instead of classifying them under a broad title of animal products. Due to this change, producers now must list the species and life stage of the insect on their product. [12]
In 2021, the EU authorized insect-derived processed animal proteins in poultry and pig feed. [1]
The following outline is provided as an overview of and topical guide to agriculture:
Animal husbandry is the branch of agriculture concerned with animals that are raised for meat, fibre, milk, or other products. It includes day-to-day care, management, production, nutrition, selective breeding, and the raising of livestock. Husbandry has a long history, starting with the Neolithic Revolution when animals were first domesticated, from around 13,000 BC onwards, predating farming of the first crops. By the time of early civilisations such as ancient Egypt, cattle, sheep, goats, and pigs were being raised on farms.
Mealworms are the larval form of the yellow mealworm beetle, Tenebrio molitor, a species of darkling beetle.
Entomophagy in humans or human entomophagy describes the consumption of insects (entomophagy) by humans in a cultural and biological context. The scientific term used in anthropology, cultural studies, biology and medicine is anthropo-entomophagy. Anthropo-entomophagy does not include the eating of arthropods other than insects such as arachnids and myriapods, which is defined as arachnophagy.
An animal product is any material derived from the body of a non-human animal. Examples are fat, flesh, blood, milk, eggs, and lesser known products, such as isinglass and rennet.
Hermetia illucens, the black soldier fly, is a common and widespread fly of the family Stratiomyidae. Since the late 20th century, H. illucens has increasingly been gaining attention because of its usefulness for recycling organic waste and generating animal feed.
In animal husbandry, feed conversion ratio (FCR) or feed conversion rate is a ratio or rate measuring of the efficiency with which the bodies of livestock convert animal feed into the desired output. For dairy cows, for example, the output is milk, whereas in animals raised for meat the output is the flesh, that is, the body mass gained by the animal, represented either in the final mass of the animal or the mass of the dressed output. FCR is the mass of the input divided by the output. In some sectors, feed efficiency, which is the output divided by the input, is used. These concepts are also closely related to efficiency of conversion of ingested foods (ECI).
Intensive animal farming, industrial livestock production, and macro-farms, also known as factory farming, is a type of intensive agriculture, specifically an approach to animal husbandry designed to maximize production while minimizing costs. To achieve this, agribusinesses keep livestock such as cattle, poultry, and fish at high stocking densities, at large scale, and using modern machinery, biotechnology, and global trade. The main products of this industry are meat, milk and eggs for human consumption. There are issues regarding whether intensive animal farming is sustainable in the social long-run given its costs in resources. Analysts also raise issues about its ethics.
Poultry farming is the form of animal husbandry which raises domesticated birds such as chickens, ducks, turkeys and geese to produce meat or eggs for food. Poultry – mostly chickens – are farmed in great numbers. More than 60 billion chickens are killed for consumption annually. Chickens raised for eggs are known as layers, while chickens raised for meat are called broilers.
Animal feed is food given to domestic animals, especially livestock, in the course of animal husbandry. There are two basic types: fodder and forage. Used alone, the word feed more often refers to fodder. Animal feed is an important input to animal agriculture, and is frequently the main cost of the raising or keeping of animals. Farms typically try to reduce cost for this food, by growing their own, grazing animals, or supplementing expensive feeds with substitutes, such as food waste like spent grain from beer brewing.
The environmental impacts of animal agriculture vary because of the wide variety of agricultural practices employed around the world. Despite this, all agricultural practices have been found to have a variety of effects on the environment to some extent. Animal agriculture, in particular meat production, can cause pollution, greenhouse gas emissions, biodiversity loss, disease, and significant consumption of land, food, and water. Meat is obtained through a variety of methods, including organic farming, free-range farming, intensive livestock production, and subsistence agriculture. The livestock sector also includes wool, egg and dairy production, the livestock used for tillage, and fish farming.
Microponics, in agricultural practice, is a symbiotic integration of fish, plants, and micro-livestock within a semi-controlled environment, designed to enhance soil fertility and crop productivity. Coined by Gary Donaldson, an Australian urban farmer, in 2008, the term was used to describe his innovative concept of integrated backyard food production. It is important to note that while "microponics" had been previously used to refer to an obscure grafting method in hydroponics, Donaldson's application of the term was derived from the amalgamation of micro-livestock (micro-farming) and the cultivation of fish and plants, a practice commonly known as aquaponics.
Animal-free agriculture, also known as veganic agriculture, stockfree farming or veganic farming, consists of farming methods that do not use animals or animal products.
Insect farming is the practice of raising and breeding insects as livestock, also referred to as minilivestock or micro stock. Insects may be farmed for the commodities they produce, or for them themselves; to be used as food, as feed, as a dye, and otherwise.
Insects as food or edible insects are insect species used for human consumption. Over 2 billion people are estimated to eat insects on a daily basis. Globally, more than 2,000 insect species are considered edible, though far fewer are discussed for industrialized mass production and regionally authorized for use in food. Many insects are highly nutritious, though nutritional content depends on species and other factors such as diet and age. Insects offer a wide variety of flavors and are commonly consumed whole or pulverized for use in dishes and processed food products such as burger patties, pasta, or snacks. Like other foods, there can be risks associated with consuming insects, such as allergic reactions. As commercial interest in insects as food grows, countries are introducing new regulatory frameworks to oversee their production, processing, marketing, and consumption.
Organic aquaculture is a holistic method for farming fish and other marine species in line with organic principles. The ideals of this practice established sustainable marine environments with consideration for naturally occurring ecosystems, use of pesticides, and the treatment of aquatic life. Managing aquaculture organically has become more popular since consumers are concerned about the harmful impacts of aquaculture on themselves and the environment.
Alphitobius diaperinus is a species of beetle in the family Tenebrionidae, the darkling beetles. It is known commonly as the lesser mealworm and the litter beetle. It has a cosmopolitan distribution, occurring nearly worldwide. It is known widely as a pest insect of stored food grain products such as flour, and of poultry-rearing facilities and it is a vector of many kinds of animal pathogens. In larval form, it is an approved novel food in the European Union, and also used as animal feed.
Feed manufacturing refers to the process of producing animal feed from raw agricultural products. Fodder produced by manufacturing is formulated to meet specific animal nutrition requirements for different species of animals at different life stages. According to the American Feed Industry Association (AFIA), there are four basic steps:
Insect-based pet food is pet food consisting of, or containing insects digestible by pets such as dogs or cats. A limited, but growing number of products are available on the market, including insect-based cat food, dog food, and pet treats.
AgriProtein is a British agricultural and biotechnology company that uses insects to convert food waste into sustainable products including: an alternative protein for use in livestock and aquaculture feed, a natural oil for use in animal feed, and an organic soil enhancer. The company was founded in 2008 in South Africa. AgriProtein is a subsidiary of the Insect Technology Group.
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