• KOREAN POULTRY JOURNAL
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• v.35 no.5 s.403
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• pp.155-157
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• 2003

• KOREAN POULTRY JOURNAL
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• v.34 no.3 s.389
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• pp.128-130
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• 2002

• Korea Petroleum Association Journal
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• s.290
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• pp.2-5
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• 2013

• KOREAN POULTRY JOURNAL
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• v.55 no.9
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• pp.148-152
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• 2023

• KOREAN POULTRY JOURNAL
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• v.55 no.3
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• pp.149-153
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• 2023

• Monthly Duck's Village
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• s.81
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• pp.54-60
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• 2010

2006년 기준으로 1천8백만 수수의 육용오리가 사육되고 있는 영국에서는 오리 사육시 복지적인 측면에서의 생산 시스템에 대하여 여러 의견이 나오고 있다. 자연에서 물과 오리의 상관관계에도 불구하고, 오리가 몸을 담그거나 헤엄칠 수 있는 등 활동에 필요한 물을 제공해야한다는 어떠한 법적 규제도 마련되어 있지 않다. 어떤 경우에는 오리들이 머리를 물에 담글 수 있게 트러프(홈통형 물통)을 제공하기도 하지만 어떤 경우에는 니플 급수기를 통해서만 물에 접근할 수 있기도 하다. 유럽평의회는 오리들이 머리를 담그고 깃털을 적실 수 있는 형태로 물을 제공할 것을 권장한다. 우리는 이번 연구에서 오리의 복지가 자연 및 물의 접근 허용 점위와 관련이 있다는 것을 밝히고자 오리의 몸과 깃털 상태를 기록하는 한편, 물 제공에 따른 복지 수준을 평가하기 위해 3자기 행동 평가를 하였다. 오리들은 욕조(작은 연못), 트러프, 샤워시설, 니플급수기, 5주령까지 니플 급수기만 제공하고 이후 욕조를 이용하는 등의 5가지 방법으로 물에 접근할 수 있도록 하였고, 이는 1)한 시설에서 오리가 보내는 시간, 2)욕조가 주어졌을 때 오리들의 보상행동, 3) 오리들이 가장 선호하는 시설을 기록하여 오리의 행동을 평가하였다. 이를 통해 오리들이 머리를 담그고 깃털을 정리할 수 있는 물을 제공하지 않으면 오리들이 코나 깃털을 깨끗이 유지할 수 없다는 결론을 얻을 수 있었다. 중요한 것은 욕조, 트러프, 샤워기를 통해 물을 제공해 주었을 때 물에서 목욕(bathing)을 하며 보낸 시간은 모두 동일하였다는 사실이다. 그러나 니플 급수기에서 목욕행동(bathing movement)을 한 시간은 아주 짧았으며, 니플 급수기 만으로 사육되었던 오리군의 욕조시설을 제공하였을 때는 '보상 반등행동'을 보였다. 트러프나 샤워시설이 제공되었던 그룹에서는 보상행동을 보이지 않아 이러한 시설들이 욕조와 동일한 작용을 하는 것으로 볼 수 있다. 또, 오리들에게 선택권이 주어졌을 때 오리들은 욕조에서 헤엄을 치고, 샤워시설에서 물을 마시고 장난치는 것을 선호하는 것으로 나타났다. 다른 시설들이 제공되었을 때 오리들은 니플 급수기에서 거의 시간을 보내지 않았다. 이번 연구를 통하여 육용 오리의 사육 환경의 복지 개선을 위해 트러프나 샤워 시설로 실제 욕조(작은 연못) 만큼 긍정적인 효과를 얻음을 확인 할 수 있었다.

• Journal of Animal Science and Technology
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• v.54 no.4
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• pp.267-274
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• 2012

The method of sexing based on differences in the rate of feather growth provides a convenient and inexpensive approach. The locus of feather development gene (K) is located on the Z chromosome and can be utilized to produce phenotypes that distinguish between the sexes of chicks at hatching. To establish the auto-sexing native chicken strains, this study analyzed the genotype frequency of the feathering in domestic chicken breeds. The method of classification of slow- and rapid-feathering chickens was also investigated. In the slow-feathering chicks, the coverts were either the same length or longer than the primary wing feathers at hatching. However, the rapid-feathering chicks had the primary wing feathers that were longer than the coverts. The growth pattern of tail feather also distinctively differed between the rapid- and slow-feathering chicks after 5-days. The accuracy of wing feather sexing was about 98% compared with tail sexing. In domestic chicken breeds, Korean Black Cornish, Korean Rhode Island Red, and Korean Native Chicken-Red had both dominant (K) and recessive ($k^+$) feathering genes. The other breeds of chickens, Korean Brown Cornish, Ogol, White Leghorn, Korean Native Chicken-Yellow, -Gray, -White and -Black had only the recessive feathering gene ($k^+$). Consequently, feather sexing is available using the domestic chicken breeds. Establishing the maternal stock with dominant gene (K-) and paternal stock with recessive gene ($k^+k^+$), the slow-feathering characteristic is passed from mothers to their sons, and the rapid-feathering characteristic is inherited by daughters from their fathers.

• Korean Journal of Ichthyology
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• v.24 no.2
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• pp.139-142
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• 2012

Two specimens of Asterorhombus intermedius (130.0~143.4 mm SL), belonging to the family Bothidae, were firstly collected from the coastal waters of Jeju Island, Korea. This species was characterized by having 54~56 lateral line scales, first dorsal-fin ray with a long projection, and various size of black spots on the body. The morphological characteristics matched well with previous description of A. intermedius. Therefore, we add this species to the Korean fish fauna and propose its Korean name, "Git-teol-dung-geul-neob-chi-sok" and "Git-teol-dung-geul-neob-chi" for the genus and species, respectively.

• Korean Journal of Organic Agriculture
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• v.29 no.4
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• pp.589-600
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• 2021

The present study investigated the effect of perch material type (wood and steel) on performance, blood characteristics, and feather pecking. A total of 1,700, one-day-old female Hy-Line brown chicks were evenly assigned to two treatments (wood and steel). The body weight and uniformity of birds were investigated over a 10-week experimental period. Blood characteristics and feather pecking was conducted at week 10. The wood perch treatment (WP) and steel perch treatment (SP) did not differ in their body weight, uniformity, and serum biochemical profile (except inorganic phosphorus) of pullets. Inorganic phosphorus on serum in WP significantly higher than that in SP (P<0.05). Blood corpuscle composition (leukocyte, erythrocyte, and Heterophil / Lymphocyte ratio) of pullets did not show any significant differences among treatments at week 10. Serum corticosterone and feather score that is stress and welfare indices were not affected by the type of perch material. In conclusion, our results suggest that performance, blood characteristics, and feather pecking of pullets were not affected by the perch material type. The results of this study can serve as basic data for investigating the effects of perch type on layer pullets.

• Korean Journal of Environmental Biology
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• v.42 no.1
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• pp.127-134
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• 2024

The feathery branched green alga Bryopsis plumosa (Hudson) C. Agardh bloomed at Songji Beach, Haenam, Korea, in November 2022. A terrible stench was present on the beach, and the bottom was covered in a thick green mat of green algae. The alga was identified as B. plumosa, which is an opportunistic species currently distributed worldwide. Dissolved inorganic nitrogen (DIN) and dissolved inorganic phosphorus (DIP) were analyzed in the bloomed area and compared with those of other vicinities. The DIN and DIP concentrations were 1.067 and 0.461 mg L^-1, respectively, which were 6 to 19 times higher than the average concentrations on southwest coasts, including Haenam. The B. plumosa bloom at Songji Beach in November 2022 appears to have depended on DIN and DIP concentrations in seawater. In this study, we report on the mass occurrence of B. plumosa, which appeared for the first time in Korea. This occurrence was found to be closely related to the concentration of nutrients in seawater. Therefore, it is necessary to manage the concentration of nutrients on land flowing into coastal waters to control green algal blooms such as Bryopsis.