• Animal Bioscience
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• 제35권2_spc호
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• pp.332-346
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• 2022

Shortage of protein feed resources is the major challenge to the world farm animal industry. Insects are known as an alternative protein source for poultry. A wide range of insects are available for use in poultry diets. Insect larvae thrive in manure, and organic waste, and produce antimicrobial peptides to protect themselves from microbial infections, and additionally these peptides might also be functional in poultry feed. The feed containing antimicrobial peptides can improve the growth performance, nutrient digestibility, intestinal health, and immune function in poultry. Insect meal contains a higher amount of essential amino acids compared to conventional feedstuffs. Black soldier fly, mealworm, housefly, cricket/Grasshopper/Locust (Orthoptera), silkworm, and earthworm are the commonly used insect meals in broiler and laying hen diets. This paper summarizes the nutrient profiles of the insect meals and reviews their efficacy when included in poultry diets. Due to the differences in insect meal products, and breeds of poultry, inconsistent results were noticed among studies. The main challenge for proper utilization, and the promising prospect of insect meal in poultry diet are also addressed in the paper. To fully exploit insect meal as an alternative protein resource, and exert their functional effects, modes of action need to be understood. With the emergence of more accurate and reliable studies, insect meals will undoubtedly play more important role in poultry feed industry.

• 식품과학과 산업
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• 제55권2호
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• pp.176-187
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• 2022

Because of human population growth, longer lifespans, and climate change, there is growing concern around world to produce enough food and feed. Insects are regarded as an alternative with high potential because the production of insects demands limited amounts of water and land, and they can add value to low-value by-products. Insects have high levels of crude protein, lipids and minerals. The relative amount of protein can vary substantially, with crude protein content ranging from 23% to 76%, depending on insect species. Their amino acid composition is good and protein digestibility is high. Insect to be a significant sustainable source as a replacement of ingredients such as soya or fishmeal in the feeds of terrestrial livestock or fish. This review provides an overview of nutritional value of insect in animal feed and challenges required to develop a sustainable, safe, and affordable insect farming industry.

• 한국환경과학회지
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• 제28권8호
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• pp.709-712
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• 2019

The effect of insect feed powder on the growth performance and economic evaluation of ducks was investigated. One hundred and twenty-old Pekin ducks were randomly assigned to two dietary treatments (0% and 1% Hermetia illucens powder) with three replicates of 20 birds each for 14-42 d. No significant (p>0.05) difference in growth performance between the control and 1% H. illucens powder was observed, except the feed conversion ratio (p<0.05), for the experimental period. The treatments with 1% H. illucens powder improved the economic indicators in comparison with the controls. Therefore, a diet supplemented with 1% H. illucens powder could significantly improve the feed conversion ratios and increase the economic indicators.

• Journal of Animal Science and Technology
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• 제64권3호
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• pp.409-431
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• 2022

Various insects have emerged as novel feed resources due to their economical, eco-friendly, and nutritive characteristics. Fish, poultry, and pigs are livestock that can feed on insects. The digestibility of insect-containing meals were presented by the species, life stage, nutritional component, and processing methods. Several studies have shown a reduced apparent digestibility coefficient (ADC) when insects were supplied as a replacement for commercial meals related to chitin. Although the expression of chitinase mRNA was present in several livestock, indigestible components in insects, such as chitin or fiber, could be a reason for the reduced ADC. However, various components can positively affect livestock health. Although the bio-functional properties of these components have been verified in vitro, they show positive health-promoting effects owing to their functional expression when directly applied to animal diets. Changes in the intestinal microbiota of animals, enhancement of immunity, and enhancement of antibacterial activity were confirmed as positive effects that can be obtained through insect diets. However, there are some issues with the safety of insects as feed. To increase the utility of insects as feed, microbial hazards, chemical hazards, and allergens should be regulated. The European Union, North America, East Asia, Australia, and Nigeria have established regulations regarding insect feed, which could enhance the utility of insects as novel feed resources for the future.

• Animal Bioscience
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• 제35권2_spc호
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• pp.347-355
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• 2022

Among edible insects, black soldier fly (Hermetia illucens), yellow mealworm (Tenebrio molitor), and common housefly (Musca domestica) have been considered as an alternative protein source for pigs. Because they are easy to breed and grow in the organic wastes, and they have well-balanced nutritional value as a protein source for pigs. The black soldier fly larvae and mealworm could replace the fish meal in the diets for weaned pigs without adverse effects on growth performance and nutrient digestibility. Black soldier fly could also be included in the finishing pig's diet without any negative effects on the growth performance and pork quality of the market pigs. Insect products showed a greater standardized ileal digestibility value of amino acids than conventional animal proteins in growing pigs. Due to the limited amount of insect products used for pig feeding study, most previous pig studies have been conducted in weaned pigs. Thus, further study is needed about the optimal inclusion level of insect products in every phase diet from weaned pigs to sows. The use of insect products in swine diets has some challenges in terms of cost, supply, and safety. Lastly, intrinsic differences among insect species, processing method, and feeding phase should be taken into consideration for the use of insect products in the swine diets.

• International Journal of Industrial Entomology and Biomaterials
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• 제32권2호
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• pp.69-79
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• 2016

Distillers dried grain (DDG) and makgeolli spent grain (MSG) are agricultural byproducts to produce alcoholic beverage. However, they are known to contain enough nutrients. Mealworm is a promising insect resource for an animal feed ingredient as well as alternative human food. With low cost, DDG and MSG were investigated as a feed ingredient for rearing high quality mealworms. DDG and MSG were mixed with wheat bran and compared to control feed (only wheat bran) for its effects on larval survivorship, larval weight, duration for developmental period, pupation rate, and pupal weight. When DDG added, larval survivorship was reduced to 50~70% compared to the control group. Larvae fed on DDG were heavier from third to sixth week. Especially, larvae with 50% DDG were 28% heavier than the control group at the third week. For the larval period, the 50% DDG group was 11% less than that for the control. The pupal weight for the 30% DDG group was 7% heavier than that for the control group. Pupation rates for all the DDG groups were higher than 90%. When compared to the control, larval survivorship for the 70% MSG group was low, but the 50% and 70% MSG groups were high during the seventh and eighth weeks because of delayed development. After the eighth week, larvae with 70% MSG showed the highest larval weight increase as 9~18% compared to the control group. Except 70% MSG group, all of MSG groups showed more than 90% pupation rates. We confirmed that adding 30~50% of DDG or MSG to conventional wheat bran have a strong potential to replace the conventional wheat bran insect feed for quality insect production.

• 생명과학회지
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• 제28권5호
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• pp.563-568
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• 2018

곤충은 식량 기능성 소재 농업자재 등 미래의 농업자원으로 유망하며, 지속적인 시장성장이 예상되고 있다. 또한 갈색거저리 유충, 쌍별귀뚜라미, 흰점박이꽃무지 및 장수풍뎅이의 유충이 일반식품원료로 인정됨에 따라 식용곤충에 대한 관심이 높아지고, 이에 대량생산을 위한 사육기술의 표준화 및 먹이원 개발에 관한 연구가 요구되고 있다. 본 연구는 흰점박이꽃무지와 장수풍뎅이 유충의 발육촉진 효과를 확인하기 위해 애견사료 및 양돈사료와 같은 시판 중인 가축사료와 밀기울을 첨가한 발효톱밥을 이용하였다. 밀기울 첨가 처리구는 흰점박이꽃무지와 장수풍뎅이의 생존율과 증체율이 현저히 낮은 수준으로 곤충 먹이원의 소재로 사용되기에 부적합한 발육양상을 보였다. 애견사료 및 양돈사료를 첨가한 먹이원을 급여하였을 때 흰점박이꽃무지와 장수풍뎅이 모두에서 유충의 생존율 및 증체율이 높고 유충기간이 단축되는 것으로 나타났다. 특히, 애견사료 5% 첨가 조건에서 흰점박이꽃무지 유충의 증체율은 초기 무게와 대비하여 179.2%로 가장 높았고, 장수풍뎅이 유충의 증체율은 애견사료 2.5% 첨가 조건에서 299.9%로 가장 높았다. 또한, 애견사료 2.5% 첨가 사료를 급여했을 때 흰점박이꽃무지와 장수풍뎅이의 유충기간은 약 67일과 116일로 기본 발효톱밥을 급여한 대조구에 비해 40일 이상 짧게 조사되었다. 따라서 가축사료는 부식성 식용곤충에 우수한 발육 효과를 나타내는 곤충 먹이원의 소재로서 활용될 수 있을 것으로 기대된다.

• 생명과학회지
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• 제27권10호
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• pp.1185-1190
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• 2017

세계적으로 곤충시장이 매년 성장하는 가운데 우리나라에서도 곤충산업이 미래 유망 산업으로 주목 받고 있다. 뿐만 아니라, 최근 갈색거저리와 쌍별귀뚜라미, 흰점박이꽃무지 및 장수풍뎅이가 일반식품원료로 등록됨에 따라 식용곤충에 대한 관심이 늘고 곤충의 대량사육이 전국적으로 이루어지고 있다. 이에 안전하고 고영양성분이 포함된 식용곤충 전용 먹이원 개발 연구가 필요하다. 최근 들어 각종 부존자원의 사료화는 부존자원의 활용, 사료비 절감, 환경보존 등의 효과를 거두고 있는 것으로 나타나고 있다. 따라서 식용곤충으로 많이 사육되고 있는 흰점박이꽃무지의 생육을 촉진하면서 경제적이고 안정적인 사육을 도모하기 위해 감귤박, 비지박, 대두박, 맥주박 등 4종의 부존자원을 이용하여 효과를 조사하였다. 10% 비지박을 급여한 유충의 무게가 대조구 대비 약 3.5배 증가하였고, 유충기간 또한 40% 이상 단축되었다. 또한, 10% 비지박 첨가 실험구에서 일반조성분과 미네랄 및 아미노산의 함량이 전체적으로 높은 것으로 나타났다. 중금속 함량 분석 결과, 납과 카드뮴 및 비소는 모든 실험구에서 검출되지 않았다. 본 연구결과는 흰점박이꽃무지 유충의 생육 촉진 효과를 가지는 비지박이 곤충 먹이원의 소재로 활용될 수 있음을 보여준다.

• 농업과학연구
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• 제45권4호
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• pp.655-663
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• 2018

The insect gut microbiome is known to have important roles in host growth, development, digestion, and resistance against pathogens. In addition, the genetic diversity of the insect gut microbiota has recently been recognized as potential genetic resources for industrial bioprocessing. However, there is limited information regarding the insect gut microbiota to better help us understand their potential benefits for enhanced pig production. With the development of next-generation sequencing methods, whole genome sequence analysis has become possible beyond traditional culture-independent methods. This improvement makes it possible to identify and characterize bacteria that are not cultured and located in various environments including the gastrointestinal tract. Insect intestinal microorganisms are known to have an important role in host growth, digestion, and immunity. These gut microbiota have recently been recognized as potential genetic resources for livestock farming which is using the functions of living organisms to integrate them into animal science. The purpose of this literature review is to emphasize the necessity of research on insect gut microbiota and their applicability to pig production or bioindustry. In conclusion, bacterial metabolism of feed in the gut is often significant for the nutrition intake of animals, and the insect gut microbiome has potential to be used as feed additives for enhanced pig performance. The exploration of the structure and function of the insect gut microbiota needs further investigation for their potential use in the swine industry particularly for the improvement of growth performance and overall health status of pigs.

• 생명과학회지
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• 제27권6호
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• pp.702-707
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• 2017

최근 쌍별귀뚜라미와 갈색거저리, 흰점박이꽃무지 및 장수풍뎅이의 유충이 식품의약품안전처에서 정한 식품공전에 등록되어 일반식품원료로 인정되면서 식용곤충에 대한 관심이 높아짐에 따라 안전한 사육기술의 개발 및 표준화에 관한 연구가 요구되고 있다. 본 조사는 대표적인 식용곤충종인 흰점박이꽃무지, 장수풍뎅이, 그리고 갈색거저리를 대량사육하는 선도농가에 대한 현장조사 결과로, 흰점박이꽃무지와 장수풍뎅이는 참나무톱밥을 기본 먹이원으로 사용하고 갈색거저리는 밀기울을 기본 먹이원으로 사용하며, 각 곤충별로 추가되는 첨가물의 조성, 발효법, 먹이원의 공급시기, 사육조건, 출하 전까지의 유충 발육기간 등의 전반적인 생육조건들은 농가별로 상이하였다. 단지, 식용곤충별 유충의 무게는 사육밀도가 낮으며 출하 전까지 유충의 사육기간이 긴 경우 가장 무거운 것으로 조사되었다. 또한 식용곤충별로 48시간 절식 후 중금속 함량 분석 결과, 모든 곤충종에 있어 납과 카드뮴, 또는 비소의 함량이 식품의약품안전처에서 제시한 일반식품허용기준 이하의 수준이거나 검출되지 않았다. 따라서 조사 결과들을 바탕으로 흰점박이꽃무지, 장수풍뎅이, 그리고 갈색거저리의 사육조건과 먹이원, 사육방법 등을 표준화함으로써 양질의 균일한 곤충을 생산하고, 출하 전 48시간 이상의 절식 조건을 준수하여 중금속으로부터 안전성을 확보함으로써 식 약용 소재로의 활용 가능성이 매우 높을 것으로 기대된다.