• 한국정보통신학회논문지
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• 제22권11호
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• pp.1421-1427
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• 2018

사물 인터넷 기술의 급속한 발전으로 다양한 종류의 스마트 센서들이 개발 보급되고 있다. 이러한 스마트 센서들은 주로 관리자의 경험에 의해서 관리되던 축산업에도 최근 적용되어 가축 개체에 웨어러블 센서를 달거나 사물인터넷 센서를 갖춘 스마트팜 사용을 통해서 가축관리의 효율성을 향상시키고 있다. 본 논문에서는 목걸이형 스마트 센서를 이용하여 젖소의 체온과 운동량을 측정하고 이를 기반으로 개체의 상태를 파악하는 방안을 개발하였다. 특히 젖소 관리에서 제일 중요한 요소인 젖소의 발정여부를 파악하는 방안을 다양한 머신러닝 방법을 이용하여 분석하였고 이를 통해서 높은 정확도로 발정여부를 예측할 수 있음을 보였다. 제안한 방안의 사용을 통해서 젖소의 발정여부를 빠르게 확인하고 이를 통해서 젖소 관리의 효율성을 향상시킬 수 있다.

• 한국응용과학기술학회지
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• 제10권2호
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• pp.19-27
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• 1993

Levels of sterols including ${\Delta}^7$-dehydrogenase isolated from the tissues of marine animal products (20 species) were determined on 1.5% OV-17 columm of gas-liquid chromatography. The composition showed that the mussels and clams contained various sterols in their tissues : cholesterol, brassicasterol. 24-methylenecholesterol with some minor components such as 22-trans-norcholesta-5,22-dien-3${\beta}$-ol, 22-cis-dehydrocholesterol, 22-trans-dehydrocholesterol, desmosterol, 7-dehydrocholesterol, campesterol, stigmasterol, ${\beta}$-sitosterol, isofucosterol, and 7-dehydrocholesterol which could be converted into vitamin $D_3$ in the skin tissue of animal was present in the muscle of oyster, Crassostrea gigas. On the other hand, the others including gastropoda were predominantly composed of cholesterol. The minor sterols such as 24-methylenecholesterol, stigmasterol and ${\beta}$-sitosterol in the fish intestines are supposed to be derived from dietary plankton. Cholesterol ${\Delta}^7$-dehydrogenase which could convert cholesterol into ${\Delta}^7$-dehydrogenase was present in the pickles of Tricurus haumela intestine.

• 한국항해항만학회지
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• 제43권6호
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• pp.475-482
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• 2019

해양에 대한 인간의 이용과 활동의 증가는 해양오염, 해양생태계 및 서식지 파괴로 이어지고 있다. 이러한 결과, 특히 생애주기가 길고 개체수가 적은 해양동물은 멸종위기에 내몰리고 있는 실정이다. 따라서, 우리나라 정부는 2010년부터 수족관이나 해양박물관과 같이 인공적인 서식장소 11개를 서식지외 보전기관으로 지정하여 멸종위기에 처한 해양생물들을 보전하기 위해 노력하고 있다. 그러나, 해양생물의 보전 서비스를 제공하는 서식지외 보전기관에 대한 중요성과 그 경제적 가치를 추정한 연구는 아직 이루어지지 않고 있다. 따라서 본 연구의 목적은 우리나라 해양동물의 보호와 증식을 위한 관리방안인 서식지외 보전기관의 운영정책에 대한 일반시민들의 정량적 지지도를 추정하는 것이다. 이를 위해 우리나라 푸른바다거북의 보전을 위해 시식지외 보전기관으로 운영되고 국립해양박물관의 해양동물 보전역할에 대한 경제적 가치를 추정하였다. 연구의 결과, 서식지외 보전기관과 같은 비시장재인 공공재에 대한 대표적인 가치추정법인 조건부가치추정법을 적용하여 추정된 서식지외 보전기관(국립해양박물관)의 경제적 가치는 약 418억원에서 최대 약 781억원으로 나타났다. 이러한 본 연구의 결과는 해양동물관리 정책자들에게 우리나라 연안해역에 서식하는 멸종위기에 처한 해양동물의 효율적인 관리방안 수립에 유용한 기초자료로 활용될 수 있을 것이다.

• Animal Bioscience
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• 제36권3호
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• pp.506-520
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• 2023

Objective: Japanese Brown (JBR) cattle, especially the Kochi (Tosa) pedigree (JBRT), is a local breed of moderately marbled beef. Despite the increasing demand, the interbreed differences in muscle metabolites from the highly marbled Japanese Black (JBL) beef remain poorly understood. We aimed to determine flavor-related metabolites and postmortem metabolisms characteristic to JBRT beef in comparison with JBL beef. Methods: Lean portions of the longissimus thoracis (loin) muscle from four JBRT cattle were collected at 0, 1, and 14 d postmortem. The muscle metabolomic profiles were analyzed using capillary electrophoresis time-of-flight mass spectrometry. The difference in post-mortem metabolisms and aged muscle metabolites were analyzed by statistical and bioinformatic analyses between JBRT (n = 12) and JBL cattle (n = 6). Results: A total of 240 metabolite annotations were obtained from the detected signals of the JBRT muscle samples. Principal component analysis separated the beef samples into three different aging point groups. According to metabolite set enrichment analysis, post-mortem metabolic changes were associated with the metabolism of pyrimidine, nicotinate and nicotinamide, purine, pyruvate, thiamine, amino sugar, and fatty acid; citric acid cycle; and pentose phosphate pathway as well as various amino acids and mitochondrial fatty acid metabolism. The aged JBRT beef showed higher ultimate pH and lower lactate content than aged JBL beef, suggesting the lower glycolytic activity in postmortem JBRT muscle. JBRT beef was distinguished from JBL beef by significantly different compounds, including choline, amino acids, uridine monophosphate, inosine 5'-monophosphate, fructose 1,6-diphosphate, and betaine, suggesting interbreed differences in the accumulation of nucleotide monophosphate, glutathione metabolism, and phospholipid metabolism. Conclusion: Glycolysis, purine metabolism, fatty acid catabolism, and protein degradation were the most common pathways in beef during postmortem aging. The differentially expressed metabolites and the relevant metabolisms in JBRT beef may contribute to the development of a characteristic flavor.

• Archives of Pharmacal Research
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• 제9권4호
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• pp.201-203
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• 1986

Forty species of marine shells were collected from Korean coasts and studied extensively for their lectin activities by using erythrocytes of human blooc A, AB, B. O group and rabbit blood. In total, 7 species contained lectines :Neptunea intersculpta, Omphalius nigerrimus and Scapharca subcrenata, blood group nonspecific; Saxidomus purpuratus, human blood A and AB group specific; Lepidozona coreana, Tegilarca granosa and Neptunea polycosta, rabbit blood specific.

• 한국해양바이오학회지
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• 제2권3호
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• pp.127-132
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• 2007

The innate immune response which is seen as the initial defense mechanism induced upon foreign invasion has been well documented in higher vertebrates. This has also been observed in fish infected with NNV. However, the fish immune system based on fully established genome project has not been fully elucidated. Therefore, in this review, we hope to correlate NNV infection in fish that has devastated the aquaculture industry, to its host immune system. Further, we discuss the potential preventive measures in overcoming the widespread of this neurodisease.

• Animal Systematics, Evolution and Diversity
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• nspc9호
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• pp.18-29
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• 2016

An anisogammarid amphipod, Eogammarus possjeticus (Tzvetkova, 1967), is newly recorded from Jindo Island, Korea, with a detailed description and illustrations. The species belonging to the genus Eogammarus are sharing several plesiomorphic characteristics, so they are similar to each other. However, Eogammarus possjeticus can be discriminated from congeners by the following characters combined: appendages are not fossorial, setations of antennae are weak, and the number and position of robust setae on pleonal epimera, urosomes, and telson are different from its congeners. This is the first record of the genus Eogammarus Birstein, 1933 from Korean waters.

• Animal Systematics, Evolution and Diversity
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• 제33권1호
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• pp.17-25
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• 2017

Two marine gastrotrich species of the genus Acanthodasys, A. ericinus Lee, 2012 and A. comtus Lee, 2012, are taxonomically reconsidered. Both of them were originally described based on the specimens from intertidal or sublittoral sandy bottom of the Yellow Sea and Jeju Island, South Korea, and included in a monographical publication of in 2012. However, the description of them was quite insufficient, and designations of type specimens were entirely lacking. In this study, we make a subsequent designation of type specimens for the two Acanthodasys species, and carry out a full redescription of them with additional remarks on their morphological micro-characteristics by scanning electronic microscopy. Some brief nomenclatural notes on Korean marine gastrotrichs are also provided.

• Animal Systematics, Evolution and Diversity
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• 제36권3호
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• pp.236-239
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• 2020

Pelagic tunicate, Thetys vagina Tilesius, 1802, is newly reported from Korean waters. The genus Thetys Tilesius, 1802 is also first recorded as Korean fauna. Thetys vagina is the only valid species in the genus Thetys. It is distinct from other genera by having at least 16 body muscles widely interrupted, no anterior proboscis, bent alimentary canal in the solitary oozooid, and five narrow body muscles, no ventral peduncle, an almost compact loop alimentary canal in the aggregate blastozooids. The specimens of T. vagina examined in this study were collected at the subtidal zone of Ulleung-do Island by scuba diving. In this paper, the detailed descriptions and photographs of both the solitary and aggregate living forms of T. vagina are provided.

• Animal Systematics, Evolution and Diversity
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• 제35권4호
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• pp.200-203
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• 2019

A new marine sponges, Mycale (Carmia) ieoensis n. sp., of the family Mycalidae was collected SCUBA diving in June 2017 from Ieodo Ocean Research Station, Korea. M. (C.) ieoensis n. sp. is encrusting to irregular massive type, yellow in life. This new species is similar to M. nullarosette Hoshino, 1981 in color and growth form but it differs in spicule size and sigma shape. Spicule size of M. (C.) ieoensis n. sp. smaller than that M. nullarosette. Also, M. (C.) ieoensis n. sp. has two size toxa, but M. nullarosette is not. The new species are compared to other Mycale species from the Korean region, and similar species from elsewhere.