• Agribusiness and Information Management
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• 제11권2호
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• pp.25-34
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• 2019

Poultry is one of the three major meats in Korea and is a representative source of protein. The annual per capita consumption of chicken has been showing steady growth trends, with an increase of approximately 89% in 2018 compared to that of 2005. In this study, we investigated the domestic chicken production and consumption, and conducted an overall study on the domestic chicken industry. By using consumer panel data, we analyzed the characteristics of consumers buying chicken. Specifically, poultry was categorized into two types: traditional raw chicken and processed chicken, which emphasizes convenience. The purchase of raw chickens has generally been on the decline. From these, however, the proportion of native Korean chicken and chicken cuts is on the rise. Processed chicken, on the other hand, continues to grow, especially online. After examining the consumption characteristics of consumers who buy chicken, it was found that the purchase share increased with increasing age of native Korean chickens, whereas the purchase share increased with decreasing age of processed chicken. Based on these results, we confirmed that it is necessary to establish differentiated marketing and promotion strategies for each consumer target for the growth of chicken market.

• 한국가금학회지
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• 제48권4호
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• pp.177-184
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• 2021

병아리의 성 감별은 양계 산업에 매우 중요한 요소이다. 현재, 산업적으로 병아리의 성 감별은 반성유전형질을 이용한 깃털감별법이 가장 널리 이용되고 있다. 그러나 깃털 감별로 생산된 병아리는 암컷은 모두 조우성, 수컷은 모두 만우성이므로 깃털의 조만성이 생산능력에 미치는 영향을 아는 것이 매우 중요하다. 따라서 본 연구에서는 실용 토종닭을 대상으로 조우성 닭과 만우성 닭의 생산능력을 비교 분석하고자 하였다. 분석 결과, 발생 후 12주령까지의 생존율에서 조우성 닭이 만우성 닭에 비해 유의하게 높은 생존율을 보이고 특히 암컷에서 이의 차이가 두드러졌다(P<0.05). 체중은 거의 모든 주령에서 조우성 닭과 만우성 닭 간의 차이는 없는 것으로 나타났다. 사료 섭취량 및 사료요구율에 있어서도 모든 조사 기간내 두 집단 간의 차이가 없는 것으로 나타났다. 결론적으로 실용 토종닭의 경우 조우성 닭이 만우성 닭에 비해 생존율은 우수하나 산육 능력 및 사료 이용성에는 차이가 없는 것으로 보여진다. 이는 토종닭의 깃털 감별 종계 조성과 생산체계를 구축함에 있어 깃털 조만성에 의해 생산능력이 영향을 받지 않음을 시사하는 것으로써 산업적으로 깃털 감별을 실용화하는데 매우 바람직한 결과로 사료된다.

• 한국가금학회지
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• 제19권2호
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• pp.65-76
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• 1992

Since the first outbreaks of Newcastle disease ( ND) in Korea was reported in 1927, the disease has been a major problem in Korean poultry industry. Several attempts related ND prevention and controls have been tried and significantly reduced the ND outbreaks. However, recently frequencies of ND outbreaks have been increased throughout the country since 1988. Many assumptions such as variances of ND virus pathogenicity, decreased efficacy of ND vaccine, incorrect vaccination program etc, has been issued and discussed. Therefore, to clearly understand this recent situation of ND outbreaks in Korea, we reviewed all available past informations related with ND outbreaks in Korea and compared the virulence of recently isolated ND viruses with that of a reference one. Also, we discussed about some problems related with serological diagnosis. administration methods of vaccine and vaccination program.

• Journal of Microbiology and Biotechnology
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• 제19권9호
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• pp.898-903
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• 2009

Pullorum disease affecting poultry is caused by Salmonella enterica serovar Pullorum and results in severe economic loss every year, especially in countries with a developing poultry industry. The pathogenesis of S. Pullorum is not yet well defined, as the specific virulence factors still need to be identified. Thus, to isolate specific DNA fragments belonging to S. Pullorum, this study used suppression subtractive hybridization. As such, the genome of the S. Pullorum C79-13 strain was subtracted from the genome of Salmonella enterica serovar Gallinarum 9 and Salmonella enterica serovar Enteritidis CMCC(B) 50041, respectively, resulting in the identification of 20 subtracted fragments. A sequence homology analysis then revealed three types of fragment: phage sequences, plasmid sequences, and sequences with an unknown function. As a result, several important virulence-related genes encoding the IpaJ protein, colicin Y, tailspike protein, excisionase, and Rhs protein were identified that may play a role in the pathogenesis of S. Pullorum.

• 한국가금학회지
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• 제5권1호
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• pp.15-17
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• 1978

우리나라의 양계산업은 란육류의 수요증대에 따라 수적으로나 규모면에서 급속한 발전을 가져왔으며 앞으로도 현재 외국에서 수입되는 육류(쇠고기, 돼지고기, 양고기 등)의 대체를 위해 더욱 알차게 발전되어야 할 시점에 있다. 그렇게 하기 위해서는 행정당국에서도 무제한 쇠고기, 돼지고기 등을 수입하여 가격 안정을 꾀하는 것도 중요하지만 국내산업을 육성하고 자급태세를 확립하기 위하여 계육으로 대체하는 방안을 강구하여야 하며 양계업자는 물론 사명감을 가지고 값싸고 질 좋은 닭고기를 생산하여 소비자에게 안정된 공급을 하는데 최선의 노력을 다하여야 할 것이다. 또한 양계산업도 더욱 안정된 기반을 구축하기 위하여 기술적 경영의 개선뿐만이 아니라 제도적 체계 및 여건을 확립해 나가야 된다고 본다. 이에 따른 현재 당면한 문제에 대한 개선점과 앞으로의 지표를 계시함으로서 양계산업발전의 촉구를 기하는데 제언하고자 한다. (중략)

• Asian-Australasian Journal of Animal Sciences
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• 제9권5호
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• pp.571-575
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• 1996

An experiment was conducted to measure the true metabolizable energy (TME) values of seven major poultry feed ingredients, two feed concentrates and one randomly collected layer mixed feed prepared from the available feed ingredients. The results of this study were the most thorough evaluation of the TME content of some selected common feed ingredients of Bangladesh. The observed TME values of some feed ingredients were very close to the values of different origins of feed ingredients. But the TME values measured in mixed layer feed were very low which could not support the standard requirement of laying birds. There values will be of assistance in describing the energy content of the most common available feed ingredients of Bangladesh.

• 한국가금학회지
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• 제46권4호
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• pp.249-253
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• 2019

닭 마이코플라즈마병은 전세계적으로 양계산업에 문제시 되고 있는 난계대 질병으로 병아리 품질 및 사육성적에 영향을 미친다고 알려져 있다. 본 연구는 닭 마이코플라즈마병에 대한 백신 접종을 실시하지 않은 계열화 회사의 육용 종계군을 대상으로 정기 채혈을 통해 혈청검사를 실시한 후 감염율을 확인하였고, 조사계군에서 생산된 육계 병아리에 대한 사육성적을 확인하고자 하였다. 육용종계 닭 마이코플라즈마 감염율과 그에 따른 후대병아리의 사육성적을 연도별로 확인한 결과, 종계군의 감염율이 낮아짐에 육계의 사육성적이 높아진다는 상관관계를 확인하였다. 이러한 결과를 토대로 비추어 보았을 때, 닭 마이코플라즈마병의 감염 유무는 생산된 초생추의 품질과 사육농장 성적 영향에 미치는 여러 요소들 중 하나라고 판단할 수 있다.

• Journal of Animal Science and Technology
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• 제65권2호
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• pp.441-458
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• 2023

The poultry industry, which produces excellent sources of protein, suffers enormous economic damage from diseases. To solve this problem, research is being conducted on the early detection of infection according to the behavioral characteristics of poultry. The purpose of this study was to evaluate the potential of a non-movement behavior observation method to detect sick chickens. Forty 1-day-old Ross 308 males were used in the experiments, and an isolator equipped with an Internet Protocol (IP) camera was fabricated for observation. The chickens were inoculated with Salmonella enterica serovar Gallinarum A18-GCVP-014, the causative agent of fowl typhoid (FT), at 14 days of age, which is a vulnerable period for FT infection. The chickens were continuously observed with an IP camera for 2 weeks after inoculation, chickens that did not move for more than 30 minutes were detected and marked according to the algorithm. FT infection was confirmed based on clinical symptoms, analysis of cardiac, spleen and liver lesion scores, pathogen re-isolation, and serological analysis. As a result, clinical symptoms were first observed four days after inoculation, and dead chickens were observed on day six. Eleven days after inoculation, the number of clinical symptoms gradually decreased, indicating a state of recovery. For lesion scores, dead chickens scored 3.57 and live chickens scored 2.38. Pathogens were re-isolated in 37 out of 40 chickens, and hemagglutination test was positive in seven out of 26 chickens. The IP camera applied with the algorithm detected about 83% of the chickens that died in advance through non-movement behavior observation. Therefore, observation of non-movement behavior is one of the ways to detect infected chickens in advance, and it appears to have potential for the development of remote broiler management system.

• 한국가금학회지
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• 제15권1호
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• pp.53-60
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• 1988

The purpose of this presentation is to review the situation of the Cheju broiler industry peculiarized with the integrated production and marketing system to some degree, which is not prevailed in the whole broiler industry in Korea, so as to study the case of the Cheju industry from the viewpoint of an economic integration. The economic integration in the broiler industry is grouped into three patterns： non-integration, quasi-integration and complete integration, which generally exist under the different type of market competition. The quasi-integration tends to be formed at all phases where the complete integration is not fully implemented, but the non-integration has begun to change its nature into partially integrated structure. The Cheju broiler industry is characterized by the geographical location of isolated market so that factor supplies and broiler products are marketed in the different conditions from those of mainland Korea, somewhat in an oligopolistic pattern. It was since early 1980's that the industry successfully had three dressing plants merged into one by virtue of entire growers ownership, which opened an era of an integrated industry centered on the function of dressing birds. The case of Cheju broiler industry today is to be referred to as a typical quasi-integration which is coordinated the function between growing and dressing birds directly and extended the functional cooperation to distribution of products indirectly, while factor supplies are traded independently. As a result of a quasi-integration, the growers are able to receive a fixed price set by the dressing plant of growers that has the power to adjust the supply of and demand for broilers produced and consumed in the Island. There are some problems, however, in the integration of the Cheju broiler industry, stemming mainly from the process of the structure change, ： 1) the difficulty of controlling the production of broilers, 2) continuing pressure on the integration by non-integrated sectors, 3) the challenge on the stabilized broiler market from the mainland, 4) limited effectiveness of consumer education activities, and 5) lack of leadership for the industry development through integration. It is projected that the partially integrated Cheju broiler industry will be continually developed toward the direction of a complete integration in due course, as the currently independent supply sectors are to be backward integrated. The case of the Cheju broiler integration, therefore, could be used as a reference for making the whole broiler industry in Korea develop toward the integrated structure in the future.

• Asian-Australasian Journal of Animal Sciences
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• 제24권9호
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• pp.1314-1317
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• 2011

To evaluate the effects of pulsed electric field (PEF) application on scalder and chiller water on Campylobacter contamination, four different treatments under three different water conditions including hard scalder water ($55^{\circ}C$), soft scalder water ($45^{\circ}C$) and chiller water, were applied as follows: i) a control treatment with no salt and no electric treatment, ii) a PEF only treatment, iii) a PEF treatment with 0.5% salt water, and iv) a PEF treatment with 1% salt water treatment. The use of PEF in hard scalding water showed an effect of reducing Campylobacter when compared to the control during the 200 s timeframe. With the addition of salt, the intervention caused at least 5.81 log CFU/ml reduction of Campylobacter counts after 200 s of PEF exposure. Similar effects were observed under soft scalding conditions. Campylobacter reductions were evident under chilling conditions with up to 2.00 log for PEF only, 5.77 log for PEF+0.5% salt and 2.69 log for PEF+1% salt treatment in water. Therefore, the current PEF setting for the scalder and chiller water can be successfully used to reduce pathogenic loads of Campylobacter on broiler chicken carcasses, and further research may be necessary to apply it in the poultry processing industry.