• 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.

• 한국수산과학회지
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• 제47권4호
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• pp.341-346
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• 2014

Transmissible spongiform encephalopathies (TSEs), also termed prion diseases, are a threat to food safety and to human and animal health. Variant Creutzfeldt-Jakob disease (vCJD) in humans is caused by the consumption of meat contaminated with bovine spongiform encephalopathy (BSE, mad cow disease). The BSE epidemic in the United Kingdom was shown to be related with the extensive use of BSE-contaminated meat-and-bone meal (MBM) and bovine offal. Many countries worldwide use MBM, as well as meat from cows, for aquaculture feed. This raises concerns about the safety of farmed fish, a major protein source for humans. The present work reviews recent studies on fish prion protein and the transmissibility of mammalian prion agents to fish, providing insights into the future direction of fish prion research.

• 한국어업기술학회:학술대회논문집
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• 한국어업기술학회 2003년도 춘계 수산관련학회 공동학술대회발표요지집
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• pp.315-317
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• 2003

Penaeid shrimp (Penaeus chinensis), economically important aquacultural species, belonging to family Penaeidae including genus Fenneropenaeus, widely inhabit the West Sea and South Sea in the Korean Peninsula and the Gulf of Pohai in China under the natural ecosystem. Consequent of the rapid increase in seed production, there is a need to understand the genetic traits and composition of this fish species in order to evaluate exactly the patent genetic effects induced by seed production operations. (omitted)

• 한국어업기술학회:학술대회논문집
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• 한국어업기술학회 2003년도 춘계 수산관련학회 공동학술대회발표요지집
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• pp.201-202
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• 2003

Recently, probiotics is applied for aquaculture management as an alternative method of antibiotics. Probiotics is defined as a live microbial feed supplement which a good effect to the host animal by improving its microbial condition of gastrointestinal tract (Fuller, 1989). Generally, probiotics affect growth and survival of cultured fish, water quality, immune system and so on (Rengpipat et al, 2000, Robertson et al, 2000). (omitted)

• Animal cells and systems
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• 제3권1호
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• pp.59-68
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• 1999

Chthamalus challengeri Hoek was collected from intertidal rocks to rear the larvae from hatching through nauplius to cyprid in the laboratory. Larval development consists of six nauplius stages and a cyprid. Unilobed labrum with a prominent protuberance and the frontolateral horns folded under the anterior cephalic shield margin are diagnostic features through all nauplius stages. The posterior border of the cephalic shield bears no posterior shield spines in nauplius stages IV-Ⅵ. There is a specific hispid seta in the fourth group of the antennal endopodite. Morphological features such as the cephalic shield, labrum, abdominal process, antennules, antennae and mandibles in all nauplius and cyprid stages are illustrated and described. The numerical setations of the antennule are found to aid in the intraspecific identification of barnacle nauplius stages without dissection. The keys to each stage of the barnacle larvae in Korean coastal waters are provided based on the reared nauplii of seven species: Pollicipes mitella Octomeris sulcata, Chthamalus challengeri, Balanus albicostatus B. trigonus, B. amphitrite, and B. improvisus inhabiting Korean coastal waters.

• Animal cells and systems
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• 제14권4호
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• pp.323-331
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• 2010

Ovigerous crabs of Erimacrus isenbeckii were collected from the northeastern coast of South Korea and their larvae were reared in the laboratory. Two zoeal stages were described and illustrated in detail. The first zoeal characteristics between the present material and Sasaki and Mihara's (1993: J Crust Biol. 13:511 522) were different especially in the setations of the endopods of the maxillipeds. The zoea of Erimacrus isenbeckii strongly resembled those of two Telmessus species in the Cheiragonidae, but the former could be distinguished from the latter by having spinulate carapace spines, a lateral process on the abdominal somite 3, and longer lateral spines on the telson fork.

• Asian-Australasian Journal of Animal Sciences
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• 제13권6호
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• pp.861-882
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• 2000

The seed, or grain, of modern cultivars of Lupinus angustifolius, commonly known as Australian sweet lupins (ASL), is an established feed resource for the intensive animal industries of Australia, Japan, Korea and several other countries in Asia and Europe. Since the introduction of ASL to the world marketplace about 25 years ago, researchers in many countries have found them to be a valuable component of the diet of beef and dairy cattle, sheep, pigs, poultry, finfish and crustaceans. The seed of ASL contains ~32% crude protein (CP) (~35% DM basis) and 5% oil. The main storage carbohydrates in the seed are the ${\beta}$-galactans that comprise most of the cell-wall material of the kernel and the cellulose and hemicellulose of the thick seed coats. ASL seeds contain about 40% non-starch polysaccharides (NSP) and a negligible amount of starch. This makes them an excellent ingredient for ruminant diets, as the risk of acidosis is very low. The seed of modern cultivars of domesticated Lupinus species contain negligible amounts of lectins and trypsin inhibitors so they do not require preheating before being used as an ingredient in feeds for monogastric species. They have a high digestibility coefficient for protein, >90% for most species, but a low energy digestibility, ~60%, which is mostly due to the high content of NSP. The low content of methionine (0.22%) and of lysine (1.46%) is typical of the legumes. The lysine availability for pigs is >70%. Lupin kernels contain ~39% CP (~42% DM basis), 6% oil and 30% NSP. They have a higher digestible energy for pigs and finfish and a higher metabolisable energy for poultry than whole seed. Commercial operations rarely achieve complete separation of kernel from hull and it is more likely that the kernel fraction, called splits or meats, will contain ~36% CP. The replacement of soybean meal or peas with ASL in cereal-based diets for most intensively reared animals, birds and fish is possible provided lysine, methionine and digestible energy levels are kept constant. This makes ASL economically competitive in many, but not all, circumstances.

• 한국양식학회지
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• 제2권1호
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• pp.21-32
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• 1989

이스라엘 잉어 난모세포의 발달단계와 혈청중 호르몬 농도의 변화를 알기 위해서 2월부터 3월까지 본 연구를 수행했다. 본 연구에서 얻어진 결과는 다음과 같다. 1. 난소가 발달되는 3월에 들어와서 혈청중 LH 수준이 급격히 상승하기 시작했다. 2. LH 수준은 G.S.I.의 변화와 높은 상관관계에 있었다. 3. 3월경부터 G.S.I.가 급격하게 증가했다 4. 3월중에는 성숙단계가 상당히 증가했다. 5. Early Perinuclcolus oocyte가 late perinucleolus core로의 빠른 발달을 나타냈다. 6. 난황이 축적됨으로써 late perinucleolus oocyte가 초기성숙단계인 oocyte로 되는 시기에 vitellogenesis가 시작되었다. 7. Oocyte가 후기성숙단계에 도달했을 때 세포질내에 난황으로 가득 채워졌다. 8. 이스라엘 잉어 난소의 헌미경적 형태의 변화는 G.S.I. 외관상의 변화와 연관성이 깊었다 9. LH는 이스라엘 잉어의 성성숙에 중요한 역할을 수행하는 것으로 나타났다.

• 한국어병학회지
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• 제32권1호
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• pp.29-35
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• 2019

2015년부터 2017년까지 우리나라 넙치 양식장에서 발생하는 폐사피해를 표본조사를 통해 모니터링 하였다. 표본어가는 전국의 수산질병관리원과 지속적으로 거래하고 있으며 현장방문을 통해 설문이 가능한 양식어가 중 층화구조분석을 통해 선정 하였다. 수산질병관리사 조사요원의 직접적인 현장방문을 통한 설문 조사를 수행하여 객관적으로 양식현황 및 폐사 현황을 파악하였다. 조사기간 중 24.78%/2015년, 30.19%/2016년 그리고 21.59%/2017년의 누적 폐사율을 나타내었고, 감염성 질병에 의한 폐사는 스쿠티카증(2015-2017년 평균 누적 폐사율: 56.7%)과 바이러스성출혈성 패혈증 감염(추정)(2015-2017년 평균 누적 폐사율: 8.9%)에 의한 피해가 높은 것으로 나타났으며, 제주에서는 여윔증(2016-2017년 평균 누적 폐사율: 10.3%)에 의한 피해가 높게 나타났다.

• Animal cells and systems
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• 제5권4호
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• pp.333-339
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• 2001

Common carp (Cyprinus carpio) and its aquaculture breed Israeli carp samples were obtained from two separate aquaculture facilities under the similar raising conditions during two years in the Kunsan National University, Korea. Genomic DNA was isolated from the common carp and Israeli carp for identification of genetic characteristics and genomic polymorphisms by polymerase chain reaction amplification of DNA using arbitrary primers. The arbitrary primer No.21 (ACTTCGCCAC) yielded the highest number of fragments with the average of 15.0 among the primers used in Israeli carp. A tota1 of 294 polymorphic products in common carp and 336 in Israeli carp were observed by random primers. The average number of polymorphic products generated by random RAPD primer No. 2 (GTAGAC-CCGT) showed 8.0 in Israeli carp. On average, each random RAPD primer produced 5.4 amplified polymorphic products in common carp and 6.2 in Israeli carp. An average genetic similarity (BS value) was 0.44$\pm$0.05 within the common carp and 0.32$\pm$0.04 within the Israeli carp. The degree of similarity frequency (BS) between two carps was 0.67 as generated by the primer No. 19 (GACGGATCAG). The average level of bandsharing was 0.57$\pm$0.03 between the two carps. Accordingly, the two carp populations were genetically a little distant. The electrophoretic analysis of PCR-RAPD products showed middle levels of variation between the two carp populations. This result implies that the genetic diversity among intra-population may be higher when compared with that between the two carps. The RAPD polymorphism generated by these random primers might be used as a genetic marker for populations or lines identification in important aquacultural carp.