• Animal Bioscience
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• 제35권2_spc호
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• pp.317-331
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• 2022

The aim of the present investigation is to determine the nutritional composition of various insects and their potential uses as alternative protein sources in animal diets. The feeding industry requires production systems that use accessible resources, such as feed resources, and concentrates on the potential impacts on production yield and nutritional quality. Invertebrate insects, such as black soldier flies, grasshoppers, mealworms, housefly larvae, and crickets, have been used as human food and as feed for nonruminants and aqua culture while for ruminants their use has been limited. Insects can be mass-produced, participating in a circular economy that minimizes or eliminates food- and feed-waste through bioconversion. Although the model for formula-scale production of insects as feed for domestic animals has been explored for a number of years, significant production and transformation to being a conventional protein resource remains to be deeply investigated. This review will focus on the nutritional composition of various insects and their potential use as alternative protein sources, as well as their potential use to promote and support sustainable animal production. Furthermore, nutritional compositions, such as high protein, lauric acid omega 6, and omega 3, and bioactive compounds, such as chitin, are of great potential use for animal feeding.

• 한국가금학회지
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• 제45권2호
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• pp.73-79
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• 2018

본 연구의 주제는 대체원료를 옥수수와 대두박을 대신해 첨가될 때의 원료가격들의 변화와 대체원료의 적정한 가격을 판단할 수 있는 방법을 제시하는 것이다. 옥수수과 대두박 그리고 대체원료의 가격 변화는 각각의 원료사료들의 영양소 함량과 가격 및 대체원료의 첨가량을 바탕으로 계산된다. 원료사료의 가격 변화 계산에 필요한 각 원료사료들의 대체가는 대체원료를 사용함으로써 새로 추가되거나 제외되는 영양소의 함량들을 %로 표현한 것을 의미한다. 본 계산에서 사료가격의 순변화는 질소보정 외관상 대사에너지(Nitrogen-corrected apparent metabolizable energy), 표준회장가소화(Standardized ileal digestible) 라이신(Lys), 메티오닌(Met), 트레오닌(Thr) 및 트립토판(Trp) 그리고 총 칼슘(Total Ca)과 가용인(Available P) 함량을 바탕으로 계산하였다. 계산 결과, 옥수수주정박 단위무게당 새로 첨가되거나 제외되는 원료사료들의 함량에 대한 방정식은 다음과 같다: 1 ${\times}$ 옥수수주정박 + 0.0334 ${\times}$ 대두유 + 0.0182 ${\times}$ 석회석 = 0.8893 ${\times}$ 옥수수 + 0.13 ${\times}$ 대두박 + 0.0004 ${\times}$ 라이신 + 0.0022 ${\times}$ 메티오닌 + 0.0005 ${\times}$ 트립토판 + 0.0028 ${\times}$ 트레오닌 + 0.0264 ${\times}$ 제2인산칼슘 위 식과 원료사료들의 가격을 이용하여 옥수수주정박을 각 원료사료의 에너지와 영양소함량을 고려하여 15% 정도 옥수수와 대두박을 대체시 옥수수주정박의 가격은 270원/kg으로 계산되었다. 결론적으로 본 연구에서 이용한 엑셀기반 계산 프로그램은 육계 사료에서 대체원료의 경제적 가치를 판단할 때에 도움이 될 수 있을 것으로 사료된다.

• 환경생물
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• 제39권4호
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• pp.471-478
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• 2021

흰점박이꽃무지(Protaetia brevitarsis seulensis) 유충의 대체사료인 한약재 부산물 발효원인 유용미생물(Effective microorganism, EM)과 느타리버섯 종균(Oyster mushroom fungi, OM)을 비교하였다. 각 발효된 사료의 영양성분을 비교한 결과, 조회분을 제외한 조단백, 조지방, 조섬유 함량이 OM 발효사료에서 높게 나타났다. 각 발효된 사료로 사육된 흰점박이꽃무지 유충의 영양성분을 비교한 결과 차이가 관찰되지 않았다. 각 발효사료별 흰점박이꽃무지 유충의 생체중을 주별 비교 분석한 결과, 3주차 관찰시기부터 EM과 OM을 이용한 사료에서 흰점박이꽃무지 유충 평균중량이 유의하게 높았다. 유충 사육 시 생존율은 발효사료의 경우 동일하게 96.7%이나, 비발효사료의 경우 9.8%로 매우 낮았다. 본 실험결과, 흰점박이꽃무지의 생육에 먹이 원의 발효는 꼭 필요했으며, OM은 EM을 대체할 수 있는 흰점박이꽃무지 대체사료의 발효원으로 더 안정적이었다.

• Animal Bioscience
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• 제36권7호
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• pp.1091-1100
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• 2023

Objective: The present study is to examine the effect of high inclusion of co-products in pig diets (referred to as an alternative diet) during the finishing stage on pig growth performance, meat quality and boar taint compounds. Methods: Growing pigs were fed an alternative diet made with distillers dried grains with solubles (25%), canola meal (20%), and wheat middling (15%) or a control diet based on barley and soybean meal to investigate the impact of co-products on pig performance and meat quality. Sixteen female and sixteen entire male Duroc×(Large White×Landrace) pigs (22.6±2.07 kg, body weight±standard error) were equally allocated to the diets. Results: Pigs fed the alternative diet had a lower feed intake; however, growth rate and feed conversion efficiency were unaffected by diet. A diet by sex interaction was found for gain:feed whereby males fed the alternative diet had the best feed conversion (p<0.01). Pork from pigs fed the alternative diet had lower a^* and Chroma and protein % (p<0.05), while other meat quality characteristics were unaffected. The alternative diet reduced backfat skatole levels (p<0.001). Conclusion: A diet containing high inclusion levels of co-products can be fed to pigs during the finishing stage without detrimental effects on pig performance or meat quality and with the potential to enhance pork flavour. This finding suggests a solution to increase the sustainable development of pig production.

• Asian-Australasian Journal of Animal Sciences
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• 제15권1호
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• pp.89-93
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• 2002

A total of six crossbred barrows ($Duroc{\times}Landrace{\times}Large$ White, $44.17{\pm}1.94kg$ BW) were housed conducted to evaluate apparent fecal digestibilities of Brown Rice (BR) as an alternative energy source in growing pigs. Pigs were housed individually on metabolism crate on the basis of body weight. Four treatments contained: 1) 100% of corn-soybean meal (C100; Control diet), 2) 75% of corn-soybean meal diet plus 25% of corn meal (C25), 3) 100% of brown rice-soybean meal diet (BR100), 4) 75% of brown rice-soybean meal diet plus 25% of brown rice meal (BR25). Brown rice has an excellent gross energy and crude protein composition compared to corn. The BR used had 3,801 kcal of gross energy/kg, 8.0% crude protein, 2.6% of ether extract, 0.035% calcium and 0.35% total phosphorus. The best digestibilities of energy (87.75%), DM (81.71%) and CP (78.57%) were observed in BR 100 group and the worst were found in Corn 25 group. The nutrient digestibility was not significantly different in most nutrients. Through this experiment, BR appeared a good alternative energy source that can replace corn yellow to 100% in growing pigs. Therefore, the price relationship between corn and BR may provide an excellent opportunity for pork producers to use BR in order to reduce feed costs provided that diet has been balanced for digestible amino acids.

• Asian-Australasian Journal of Animal Sciences
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• 제23권3호
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• pp.410-416
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• 2010

Methane emitted from ruminant livestock is regarded as a loss of feed energy and also a contributor to global warming. Methane is synthesized in the rumen as one of the hydrogen sink products that are unavoidable for efficient succession of anaerobic microbial fermentation. Various attempts have been made to reduce methane emission, mainly through rumen microbial manipulation, by the use of agents including chemicals, antibiotics and natural products such as oils, fatty acids and plant extracts. A newer approach is the development of vaccines against methanogenic bacteria. While ionophore antibiotics have been widely used due to their efficacy and affordable prices, the use of alternative natural materials is becoming more attractive due to health concerns regarding antibiotics. An important feature of a natural material that constitutes a possible alternative methane inhibitor is that the material does not reduce feed intake or digestibility but does enhance propionate that is the major hydrogen sink alternative to methane. Some implications of these approaches, as well as an introduction to antibiotic-alternative natural materials and novel approaches, are provided.

• Asian-Australasian Journal of Animal Sciences
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• 제29권9호
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• pp.1300-1308
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• 2016

This study was conducted to evaluate the effects of phytogenic additive and antibiotic growth promoter in laying Japanese quails. One hundred and sixty five quails were divided into three groups of 5 replicates and 11 quails (8 females and 3 males) in each replicate. Treatment 1 was fed control diet, treatment 2 was fed control diet supplemented with 0.05% bacitracin methylene disalicylate as antibiotic growth promoter and treatment 3 was fed control diet supplemented with 0.1% phytogenic feed additive (PFA) for two periods of 3 weeks each from 37 to 42 weeks of age. Results showed that egg production, eggshell strength, eggshell weight, villus height and villus height to crypt depth ratio were significantly (p${\leq}$0.05) increased and feed consumption, feed conversion ratio, albumen, Haugh unit, cholesterol, low-density lipoprotein, alanine transaminase, gamma glutamyltransferase, alkaline phosphatase, high-density lipoprotein, triglyceride, number of goblet cell, crypt depth and intestinal bacterial population of Coliforms, Salmonella and E. coli were significantly (p${\leq}$0.05) decreased in PFA fed group. It is concluded that addition of PFA containing phytomolecules and organic acids as main ingredients could significantly improve the production parameters and the general health of laying quails as an alternative to antibiotic growth promoters.

• 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.

• Asian-Australasian Journal of Animal Sciences
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• 제12권3호
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• pp.460-466
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• 1999

The huge amount of demand for feedgrains from this region could not possibly be met by producing countries from the other regions. In order to fulfill this increasing demand for conventional raw materials, an alternative for the conventional raw materials produced in the Asia and Pacific region is becoming increasingly more important. A potential alternative is concentrates or non-conventional concentrates produced locally in relative abundance in this region. These feedstuffs include feed grains, by-products from the milling, sugar industries, brewing and distilling industries. Vegetable, citrus, and animal by-products from abattoir, feather meal and blood meal are also possibilities. In addition to more widespread use of unconventional feed sources, the following approach is recommended to improve utilization and performance. These include establishing the nutritive value of non-conventional feeds, quality control to minimize variability, proper storage and processing to assure the nutritive value and prevent mycotoxin contamination, properly balance amino acids with protein sources, supplementation with synthetic amino acids and the use of enzymes to increase digestibility. Currently, practical applications for these resources in feed formulation are negligible despite the potential. The socio-economic aspects will dominate the use of these non-conventional concentrates. In the future, the feed industry will resolve the problems in using locally available raw feed materials.

• Animal Bioscience
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• 제35권8호
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• pp.1109-1120
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• 2022

Antibiotics used to be supplemented to animal feeds as growth promoter and as an effective strategy to reduce the burden of pathogenic bacteria present in the gastro-intestinal tract. However, in-feed antibiotics also kill bacteria that may be beneficial to the animal. Secondly, unrestricted use of antibiotics enhanced the antibiotic resistance in pathogenic bacteria. To overcome above problems, scientists are taking a great deal of measures to develop alternatives of antibiotics. There is convincing evidence that probiotics could replace in-feed antibiotics in poultry production. Because they have beneficial effects on growth performance, meat quality, bone health and eggshell quality in poultry. Better immune responses, healthier intestinal microflora and morphology which help the birds to resist against disease attack were also identified with the supplementation of probiotics. Probiotics establish cross-feeding between different bacterial strains of gut ecosystem and reduce the blood cholesterol level via bile salt hydrolase activity. The action mode of probiotics was also updated according to recently published literatures, i.e antimicrobial substances generation or toxin reduction. This comprehensive review of probiotics is aimed to highlight the beneficial effects of probiotics as a potential alternative strategy to replace the antibiotics in poultry.