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한국수산과학회> 한국수산과학회지

한국수산과학회지 update

Korean Journal of Fisheries and Aquatic Sciences

  • : 한국수산과학회
  • : 수해양분야  >  수산생물학
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  • : 0374-8111
  • : 2287-8815
  • : 한국수산학회지(~2009) → 한국수산과학회지(2009~)

수록정보
54권4호(2021) |수록논문 수 : 23
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54권5호(2021년 10월) 수록논문
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1수산생물병원체의 등급 마련에 관한 고찰

저자 : 조미영 ( Miyoung Cho ) , 민은영 ( Eun Young Min ) , 최혜승 ( Hye Sung Choi ) , 정승희 ( Sung Hee Jung )

발행기관 : 한국수산과학회 간행물 : 한국수산과학회지 54권 5호 발행 연도 : 2021 페이지 : pp. 585-595 (11 pages)

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Even though most of aquatic animal pathogens are considered opportunistic and many pose a low direct risk to personnel, all personnel working with aquatic pathogens and facilities using these organisms must comply with the regulation to prevent the release of the pathogen into the environment and causing disease in aquatic animals. First of all, in order to establish a biosafety system for aquatic pathogen, the list of microorganisms that can infect aquatic animals and humans should be drawn up according to the microorganisms encountered within national boundaries. Second, risk assessment guideline for diseases of livestock and aquatic environment is desperately needed. Third, microorganisms should be classified into risk group based on their potential impact on human and aquatic environment. Fourth, facilities handling aquatic pathogens should ensure that these pathogens are securely contained and safely handled for experimental or commercial development purposes. In conclusion, classification is based on the pathogenicity, mode of transmission and host range of the aquatic microorganisms, availability of effective preventative measures and treatments. Furthermore, risk group of aquatic pathogens should be correlated with physical containment facility requirements according to domestic characteristics.

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2IHNV (Infectious Hematopoietic Necrosis Virus): 과거, 현재, 그리고 미래

저자 : 박정우 ( Jeong Woo Park ) , 조미영 ( Miyoung Cho ) , 이언화 ( Unn Hwa Lee ) , 최혜승 ( Hye Sung Choi )

발행기관 : 한국수산과학회 간행물 : 한국수산과학회지 54권 5호 발행 연도 : 2021 페이지 : pp. 596-616 (21 pages)

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A global increase in fish consumption has led to a rapid expansion of aquaculture production, which has been linked to enhancing the spread of infectious diseases. Viral diseases can cause high mortality in many cultured fish species, posing a serious threat to the aquaculture industry. Infectious hematopoietic necrosis virus (IHNV) is one of the primary threats to aquacultured salmonid species, causing huge economic losses. Since the first report in cultured sockeye salmon Oncorhynchus nerka during the 1950s in North America, IHNV has spread to other regions, including Europe, Asia, South America, and Africa by transportation of infected fish and eggs, causing disease and increasing mortality in a wide variety of salmonid species. Here, we review existing information relevant to IHNV: its phylogenetic characteristics, origin, infection history, virulence determinants, susceptible hosts, vectors, and vaccine development. This review also addresses a possible cross-species transmission of IHNV to a new host, olive flounder Paralichthys olivaceus, a cultured fish of economic importance in East Asian countries.

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3조피볼락(Sebastes schlegelii) 사료 내 합성 비타민C 대체원으로써의 감귤부산물과 발효 감귤부산물의 첨가 효과

저자 : 신재형 ( Jaehyeong Shin ) , 송진우 ( Jin-woo Song ) , 김민기 ( Min-gi Kim ) , 임현운 ( Hyunwoon Lim ) , 임종호 ( Jongho Lim ) , 이경준 ( Kyeong-jun Lee )

발행기관 : 한국수산과학회 간행물 : 한국수산과학회지 54권 5호 발행 연도 : 2021 페이지 : pp. 617-623 (7 pages)

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The study was conducted to investigate the dietary supplementation of citrus by-product (CBP) and CBP fermented with Bacillus subtilis (BS) or B. pumilus (BP) on growth performance, feed utilization, innate immune responses and disease resistance of Korean rockfish Sebastes schlegelii. Triplicate groups of juvenile fish (initial weight of 22.9 g) were fed one of five experimental diets which were formulated to replace a synthetic vitamin C (L-ascorbyl- 2-polyphosphate, LAPP) with CBP or fermented CBP. A basal diet without LAPP and CBP was used as the control diet (Con). At the end of the 13 weeks feeding trial, growth performance, feed utilization and survival of fish fed the Con were significantly lower than those of fish fed the LAPP, CBP and fermented CBP diets. Fish fed the Con were significantly lower in lysozyme activity than fish fed LAPP, CBP and fermented CBP diets. In a challenge test against Edwardsiella tarda, cumulative mortality of fish fed LAPP, CBP and fermented CBP diets was significantly lower (20-30%) than that of the Con (60%). The findings in this study indicate that the CBP and/or fermented CBP can be a promising vitamin C source for LAPP replacement in diet for Korean rockfish.

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4사료 내 갈색거저리(Tenebrio molitor) 유충과 동애등에(Hermetia illucens) 유충의 첨가에 따른 흰다리새우(Litopenaeus vannamei)의 비특이적 면역력, 항산화력, Vibrio parahaemolyticus에 대한 저항성 및 성장 효과

저자 : 신재형 ( Jaehyeong Shin ) , 신재범 ( Jaebeom Shin ) , 엄건호 ( Gunho Eom ) , 이경준 ( Kyeong-jun Lee )

발행기관 : 한국수산과학회 간행물 : 한국수산과학회지 54권 5호 발행 연도 : 2021 페이지 : pp. 624-633 (10 pages)

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This study was conducted to determine the supplemental effects of two insect meals, mealworm (MW) and black soldier fly (BSF), with high or low lipid levels in diets, on Pacific white shrimp Litopenaeus vannamei. Sardine and tuna by-product meals were used as the fish meal source in a control (Con) diet. The fish meals were replaced with MW, defatted MW (deMW), BSF or defatted BSF (deBSF), respectively. The shrimp (body weight: 0.47 g) were stocked into 20 acryl tanks (215 L) and fed the diets six times a day. After 45 days of the feeding trial, the shrimp that were fed insect meals had significantly higher phenoloxidase and superoxide dismutase activities than the shrimp fed Con diet. The gene expressions of prophenoloxidase, crustin and penaeidine-3c in shrimp hepatopancrease were also higher in shrimp that were fed the insect diets, regardless of defatting than those in shirmp that were fed Con diet. The survival against Vibrio parahaemolyticus was higher in shrimp that were fed the diets containing defatted insect meals than in shrimp that were fed Con diet. These results indicate that MW and BSF, regardless of lipid levels, could be good protein sources for the enhancement of innate immunity and anti-oxidant capacity of the shrimp.

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5한인진(Artemisia iwayomogi Kitamura)과 참당귀(Angelica gigas Nakai) 추출물이 넙치(Paralichthys olivaceus) 항병력에 미치는 영향

저자 : 김나영 ( Na Young Kim ) , 이남실 ( Nam-sil Lee ) , 전은지 ( Eun Ji Jeon ) , 서정수 ( Jung Soo Seo ) , 우수지 ( Soo Ji Woo ) , 김명석 ( Myung Sug Kim ) , 강소영 ( So Young Kang ) , 정승희 ( Sung Hee Jung )

발행기관 : 한국수산과학회 간행물 : 한국수산과학회지 54권 5호 발행 연도 : 2021 페이지 : pp. 634-643 (10 pages)

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Han In-jin (Artemisia iwayomogi Kitamura) and Cham Dang-gwi (Angelica gigas Nakai) exhibit antibacterial, antiparasitic, antifungal, and antiviral properties in vitro. In this study, mixture of the extracts of these two medicinal plants was absorbed on pellets. Thereafter, these pellets were fed to olive flounder Paralichthys olivaceus for 12 weeks at laboratory (1st experiment) and 24 weeks at field test (2nd experiment), and the immune activity and disease resistance properties of the extracts were examined. It was observed that lysozyme activities of plasma, spleen, and kidney improved after 12 weeks. Furthermore, when the olive flounders were artificially infected with bacterial pathogens, their cumulative mortality decreased in the group that was fed the extracts for 12 weeks compared to that in control group, and the relative percent survival also improved. This study concluded that mixture of Han In-jin and Cham Dang-gwi extracts provides disease resistance in vivo.

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6바이러스성출혈성패혈증 바이러스 감염에 대한 3-Methyl Catechol의 항바이러스성 활성

저자 : 조세영 ( Se-young Cho ) , 민나래 ( Na-rae Min ) , 김영오 ( Young O Kim ) , 김두운 ( Duwoon Kim )

발행기관 : 한국수산과학회 간행물 : 한국수산과학회지 54권 5호 발행 연도 : 2021 페이지 : pp. 644-651 (8 pages)

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Viral hemorrhagic septicemia virus (VHSV) is a fish pathogen responsible for causing enormous economic loss to the aquaculture industry not only in Korea but worldwide. Thus, it is necessary to identify natural compounds that can be used to control the spread of VHSV. In this study, the anti-VHSV activities of five catechol derivatives, i.e., catechol, pyrogallol, 3-methyl catechol, veratrole, and 3-methyl veratrole-extracted from green tea-were assessed. The antiviral activities of these derivatives were found to be dependent on their structure, i.e., the hydroxyl or methoxyl group and their substituent groups-on the benzene ring. Catechol, pyrogallol, and 3-methyl catechol exhibited relatively high 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activities than veratrole, and 3-methyl veratrole. Moreover, 3-methyl catechol harboring a methyl substituent group increased the viability of the virus-infected cells and resulted in a 2.86 log reduction in the gene copies of VHSV N (per mL) in real-time PCR analysis. In conclusion, the catechol derivatives harboring hydroxyl groups in their benzene ring exhibited higher antioxidant activities than those harboring the methoxyl groups. However, catechol derivatives with a methyl group at the 3′-position of the benzene ring exhibited higher antiviral activity than those harboring a hydroxyl group. To our knowledge, this is the first study to evaluate the relationship between the structure and the anti-VHSV activity of catechol derivatives.

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7스쿠티카충Miamiensis avidus 주사백신용 미생물유래 면역보조제의 평가

저자 : 정명화 ( Myung-hwa Jung ) , 정성주 ( Sung-ju Jung )

발행기관 : 한국수산과학회 간행물 : 한국수산과학회지 54권 5호 발행 연도 : 2021 페이지 : pp. 652-659 (8 pages)

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Microorganism-derived compounds, such as peptidoglycan, lipoteichoic acid, and β-glucan were supplemented in the scuticociliate Miamiensis avidus (M. avidus) vaccine to verify the specify component contribution to the adjuvant effect. Vaccine was formulated with the inactivated M. avidus antigen (YS2, 4.44×105 cells/fish) in combination with either peptidoglycan (10 μg and 100 μg/fish), lipoteichoic acid (5 μg and 50 μg/fish), or β-glucan (10 μg and 100 μg/ fish). Olive flounder injected with peptidoglycan supplemented vaccine (10 μg and 100 μg/fish) exhibited significant protection, and the relative percent survival (RPS) was 55% and 65% at 4 weeks post vaccination (wpv), respectively, at the corresponding doses. The vaccine groups with added lipoteichoic acid (5 μg and 50 μg/fish) exhibited RPS of 40% and 5%, respectively. Additionally, the group with added β-glucan (100 μg/fish) exhibited RPS of 35%, but no effect was observed in the group with added 10 μg/fish β-glucan. At 8 wpv, olive flounder injected with peptidoglycan and lipoteichoic acid supplemented vaccines exhibited protection with RPS range of 11/11% and 5/21%, respectively, at the respective doses. M. avidus vaccine containing 10 μg and 100 μg/fish of β-glucan exhibited the RPS of 32% and 37%, respectively. Conclusively, peptidoglycan contributed in high protection of the M. avidus vaccine, and thus, it can be used as an effective adjuvant in the M. avidus vaccine.

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8제주지역 양식 넙치(Paralichthys olivaceus)의 점액포자충 감염조직에 대한 병리조직학적 관찰

저자 : 이남실 ( Nam-sil Lee ) , 김아란 ( Aran Kim ) , 서한길 ( Han-gil Seo ) , 최혜승 ( He Sung Choi ) , 조미영 ( Miyoung Cho )

발행기관 : 한국수산과학회 간행물 : 한국수산과학회지 54권 5호 발행 연도 : 2021 페이지 : pp. 660-667 (8 pages)

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In recent years, myxosporean infection from the cultured olive flounders Paralichthys olivaceus, have been frequently observed in Jeju island, South Korea. This study aimed to compare histopathological and molecular-biological methods of examining myxosporean infection from these flounders. Samples were obtained from affected individuals exhibiting emaciation or abdominal distention and a polymerase chain reaction (PCR) indicative of Parvicapsular anisocaudata, Enteromyxum leei and Kudoa septempunctata were initiated. Histopathological examination were conducted with H&E stained tissue sections, and then in-situ hybridization (ISH) reaction were processed with selected sections using P. anisocaudata, E. leei, K. septempunctata and Scuticociliate probes. Renal and intestinal tissue degeneration were common symptoms associated with all samples. Sever glomerular and renal tubular degeneration were evident, as were intestinal epithelial desquamation and spore formation in the epithelial cells. The results of conventional PCR analysis and ISH reactions revealed differences, and we suspect that various microparasites may have been associated with the symptoms manifested.

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9국내 양식 뱀장어(Anguilla japonica, Anguilla bicolor and Anguilla marmorata)의 JEECV (Japanese Eel Endothelial Cell-infecting Virus) 와 AnHV (Anguillid Herpesvirus 1) 감염 현황 및 특성 연구

저자 : 장문희 ( Mun Hee Jang ) , 이남실 ( Nam-sil Lee ) , 조미영 ( Miyoung Cho ) , 송준영 ( Jun-young Song )

발행기관 : 한국수산과학회 간행물 : 한국수산과학회지 54권 5호 발행 연도 : 2021 페이지 : pp. 668-675 (8 pages)

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The infection status of domestic farmed eels Anguilla japonica, Anguilla bicolor and Anguilla marmorata with Japanese eel endothelial cell-infecting virus (JEECV) and anguillid herpesvirus 1 (AnHV) was examined at the major eel farming areas in Korea. These viruses were detected in all areas examined, regardless of the eel species or age. Any farm with a history of viral infection in adult fish confirmed the infection to be transmitted to stocked fry within 3 to 5 months. It is proposed that both viruses are horizontally transmitted within a given farm. The primary symptoms and histopathological lesions produced by the two viral infections are similar, making it difficult to distinguish the two diseases through clinical symptoms. Both viruses displayed 100% detection in the gills, suggesting that the gills are an optimal tissue for JEECV and AnHV monitoring. This study concluded that JEECV and AnHV were prevalent on eel farms across the country and caused very high mortality when the two viruses co-infected fry. Additional studies, including experimental infections, are needed to clearly understand the pathogenicity of each virus and the risk of co-infection.

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10염분 변화에 따른 무지개송어(Oncorhynchus mykiss)의 삼투조절 유전자 발현변화

저자 : 최영광 ( Young Kwang Choi ) , 박흠기 ( Heum Gi Park ) , 김이경 ( Yi Kyung Kim )

발행기관 : 한국수산과학회 간행물 : 한국수산과학회지 54권 5호 발행 연도 : 2021 페이지 : pp. 676-684 (9 pages)

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Euryhaline teleost have extraordinary ability to deal with a wide range of salinity changes. To study the seawater adaptability of rainbow trout Oncorhynchus mykiss (body weight 638±54 g, length 38.6±2 cm) to salinity increase fish were transferred from freshwater to 7, 14, 21, 28 and 32 psu and checked for mortality over 5 days. No mortality was observed in 0-32 psu. In fish transferred to 0-32 psu, blood osmolality was maintained within physiological range. The changes of serum enzyme activities (aspartate transaminase, AST and alanine transaminase, ALT) showed no significant level during experimental period. To explore the underlying molecular physiology of gill and kidney responsible for body fluid regulation, we measured mRNA expression of five genes, Na+/K+/2Cl- cotransporter1 (NKCC1), aquaporin3 (AQP3), cystic fibrosis transmembrane conductance regulator (CFTR), glucocorticoid receptor (GR) and growth hormone receptor (GHR) in response to salt stress. Based on our result, rainbow trout could tolerate gradual transfer up to 32 psu for 5 days without mortality under physiological stress. This study suggests to alleviate osmotic stress to fish, a gradually acclimation to increasing salinity is recommended.

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1국내 수산용 백신 개발 현황 및 발전 방향

저자 : 한현자 ( Hyun-ja Han ) , 김수진 ( Soo-jin Kim ) , 김태호 ( Tae-ho Kim ) , 김명석 ( Myoung-sug Kim ) , 조미영 ( Mi-young Cho ) , 최혜승 ( Hye Sung Choi )

발행기관 : 한국수산과학회 간행물 : 한국수산과학회지 54권 4호 발행 연도 : 2021 페이지 : pp. 369-376 (8 pages)

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In Korea, fish is a major food source, and sustainable production of fish is critical for the aquaculture industry. Recently, infectious diseases have become an unavoidable problem in aquaculture and have caused serious economic losses. Therefore, there is an urgent need to overcome this challenge to increase productivity in aquaculture. Vaccination is the most effective and long-term measure for improving the management of a fish farm. Sales of fish vaccines in Korea have been steadily increasing, with a confirmed increase from 600 million won in 2007 to 3.4 billion won in 2018. As of 2021, 30 licensed fish vaccines, including both single and combination vaccines containing more than two inactivated pathogens, have been approved in Korea for 10 fish pathogens. Twenty-eight of these are used in olive flounder Paralichthys olivaceus; however, only two vaccines are used in starry flounder Platichthys stellatus, red seabream Ragrus major and rock bream Oplegnathus fasciatus. Therefore, vaccine development is required not only for the olive flounder but also for other cultured fish species. The development of effective vaccines and vaccination programs for fish is a continuous requirement for a sustainable aquaculture industry.

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2태안군 이원면 육상오염원 배출수에서 분리한 그람음성균의 항생제 내성 특성

저자 : 박보미 ( Bo Mi Park ) , 김민주 ( Min Ju Kim ) , 정연겸 ( Yeon Gyeom Jeong ) , 박진일 ( Jin Il Park ) , 유홍식 ( Hong Sik Yu ) , 오은경 ( Eun Gyoung Oh )

발행기관 : 한국수산과학회 간행물 : 한국수산과학회지 54권 4호 발행 연도 : 2021 페이지 : pp. 377-387 (11 pages)

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Fecal contamination levels of discharge water from inland pollution sources were investigated in Iwon-myeon (Taean- gun), South Korea. Gram-negative bacteria were isolated during the investigation and the antimicrobial resistance patterns of the isolates were examined to estimate their impact on the coastal environment. The ranges of total coliform and fecal coliform of 12 samples from four major inland pollution sources were 79-490,000 MPN/100 mL and 2.0-490,000 MPN/100 mL, respectively, with the highest level of fecal contamination at Station No. 3. A total of 137 strains (14 genus) were isolated, of which 86 strains (62.8%) were Enterobacteriaceae. The identified isolates were as follows: Pseudomonas spp. (35 strains), Klebsiella spp. (20 strains), Serratia spp. (20 strains), and Escherichia spp. (19 strains). The isolated Gram-negative bacteria showed the highest antimicrobial resistance to ampicillin (81.8%), followed by amoxicillin/clavulanic acid (64.2%), ceftiofur (61.3%), and cefoxitin (59.1%). Antimicrobials in which less than 10% of isolates showed antimicrobial resistance were ciprofloxacin (3.6%) and gentamicin (2.2%). Resistance to one or more antimicrobials was observed in 121 strains (88.3%) and 84 strains (61.3%) showed a tendency for multiple antimicrobial resistance.

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3서해안 수산생물에서 분리한 대장균(Escherichia coli)의 항생제 내성 및 다제 내성 양상 비교

저자 : 정연겸 ( Yeon Gyeom Jeong ) , 박보미 ( Bo Mi Park ) , 김민주 ( Min Ju Kim ) , 박진일 ( Jin Il Park ) , 정연중 ( Yeoun Joong Jung ) , 오은경 ( Eun Gyoung Oh )

발행기관 : 한국수산과학회 간행물 : 한국수산과학회지 54권 4호 발행 연도 : 2021 페이지 : pp. 388-396 (9 pages)

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Antimicrobial resistance patterns of Escherichia coli were investigated. Strains were isolated from 310 shellfish, 36 crustaceans, and 12 fish collected off the West Coast of Korea from April 2019 to October 2020. Two hundred and ninety-five E. coli strains were isolated from shellfish, 100 from crustaceans, and 54 from fish. Strains isolated from shellfish showed the highest resistance to ampicillin (27.5%), whereas those from crustaceans were resistant to sulfisoxazole (30.0%) and those from fish were resistant to ampicillin (59.3%) and sulfisoxazole (59.3%). Ceftazidime resistance was observed in strains isolated from short neck and hard clams, whereas gentamicin resistance was observed in strains from fish. Multi-drug resistance was observed in 56 strains (48.7%) isolated from shellfish, 11 (28.2%) from crustaceans and 27 (73.0%) from fish. Depending on the source of isolation, the strains showed specific antimicrobial resistance tendency. Strains isolated from shellfish showed 12 different multi-drug resistance patterns, whereas those from crustaceans showed high resistance (59%) to a single antimicrobial agent and those from fish showed a broad trend of multi-drug resistance to more than eight antimicrobials.

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4우리나라 연안해역 생산 패류 중 다환방향족탄화수소 분석

저자 : 홍도희 ( Do Hee Hong ) , 강은혜 ( Eun Hye Kang ) , 윤민철 ( Minchul Yoon ) , 조미라 ( Mi Ra Jo ) , 손광태 ( Kwang Tae Son ) , 이가정 ( Ka Jeong Lee )

발행기관 : 한국수산과학회 간행물 : 한국수산과학회지 54권 4호 발행 연도 : 2021 페이지 : pp. 397-403 (7 pages)

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Polycyclic Aromatic Hydrocarbons (PAHs) were analyzed and safety evaluation was carried out in Korean coastal area. The target congeners were benzo[a]pyrene, benzo[a]anthracene, benzo[b]fluoranthene, and chrysene. The method of analysis was significant. The highest PAHs 4 congener concentrations (12.2 μg/kg) was found in the mussel of Gangwon area. Comparison among the average concentration of PAHs for each congener showed that, benzo[a] anthracene was found in mussel (0.276 μg/kg), oyster (0.463 μg/kg), ark shell clam (1.92 μg/kg), and chrysene was found in mussel (0.848 μg/kg), oyster (1.36 μg/kg), scallop (0.489 μg/kg), sea squirt (3.07 μg/kg), and ark shell clam (0.449 μg/kg). In addition, benzo[b]fluoranthene was found in mussel (0.253 μg/kg), scallop (0.244 μg/kg), and sea squirt (1.64 μg/kg). The most hazardous benzo[a]pyrene was found in mussel (0.147 μg/kg), and scallop (0.244 μg/ kg), it was not detected in the other shellfishes. However, all the PAHs levels recorded in this study did not exceed international MRLs. There was no significant difference among the PAHs concentration in shellfish based on sampling area or species. Body exposure was calculated based on PAHs concentration and intake rate. The results of this study indicated that PAHs in shellfish were within acceptable safe levels.

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5LC-MS/MS (Liquid Chromatography-Tandem Mass Spectrometry)를 이용한 패류 및 피낭류 중 아자스필산 분석법의 유효성 검증

저자 : 조성래 ( Sung Rae Cho ) , 정상현 ( Sang Hyeon Jeong ) , 박큰바위 ( Kunbawui Park ) , 윤민철 ( Minchul Yoon ) , 김동욱 ( Dong Wook Kim ) , 손광태 ( Kwang Tae Son ) , 하광수 ( Kwang Soo Ha )

발행기관 : 한국수산과학회 간행물 : 한국수산과학회지 54권 4호 발행 연도 : 2021 페이지 : pp. 404-410 (7 pages)

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Although, mouse bioassay for the monitoring of azaspiracids (AZAs) toxins in shellfish has been used previously, the reported method has low sensitivity and it is time-consuming. Recently, there is an interest in the quantitative analysis of AZAs using liquid chromatography-tandem mass spectrometry (LC-MS/MS). The purpose of this study is to verify the simultaneous analysis of AZAs in shellfish and tunicate in Korea using LC-MS/MS. To validate the method, linearity, limit of detection (LOD), limit of quantification (LOQ), precision, accuracy, and repeatability were determined. All standard compounds were analyzed within 7 min. The correlation coefficients (R2) of the standard solution was higher than 0.9995 (within the range of 0.8-10.0 μg/L). The LODs and LOQs of AZAs in shellfish were 0.08-0.16 μg/kg and 0.23-0.50 μg/kg, respectively. The accuracy and precision of the method for determining AZAs in shellfish were 87.1-93.0% and 1.23-4.91%, respectively. Consequently, the verified LC-MS/MS method is suitable to analyze AZAs in shellfish and tunicates in Korea.

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6사료내 약용작물 부산물이 가숭어(Liza haematocheila)의 성장, 혈액성상, 면역반응에 미치는 영향

저자 : 이봉주 ( Bong-joo Lee ) , 김민기 ( Min-gi Kim ) , 허상우 ( Sang-woo Hur ) , 이승형 ( Seunghyung Lee ) , 이진혁 ( Jinhyeok Lee ) , 김현종 ( Hyeon Jong Kim ) , 김이경 ( Yikyung Kim ) , 이승한 ( Seunghan Lee ) , 김강웅 ( Kang-woong Kim )

발행기관 : 한국수산과학회 간행물 : 한국수산과학회지 54권 4호 발행 연도 : 2021 페이지 : pp. 411-417 (7 pages)

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By-products produced from medicinal plants (MP) were evaluated as feed additives on growth performance, blood chemistry, and immune responses of the juvenile red lip mullet Liza haematocheila. A commercial diet was used as the control. Four experimental diets were prepared by combining 0.5% of MPs such as Panax ginseng (PG), Schisandra chinensis (SC), Angelica gigas (AG), and Rehmannia glutinosa (RG), via water absorption, to the control diet. Triplicate groups of fish averaging 61.8 g were fed one of experimental diets to apparent satiation for 8 weeks. Dietary supplementation of MPs did not affect the growth performance, biological indices and whole body composition of fish compared to the control. The fish fed with AG diet had an increased weight gain, and specific growth rate compared to fish in SC group. Decreased level of plasma glucose was observed in fish fed diet containing MPs. Lysozyme activity was significantly increased in the fish fed AG diet compared to that of fish in PG group. These results indicate that dietary supplementation of Angelica gigas may enhance growth performance and immune responses in juvenile red lip mullet.

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7바이오플락 기반 아쿠아포닉스 시스템 개발에 의한 뱀장어(Anguilla japonica)와 재배작물의 성장에 미치는 영향

저자 : 황주애 ( Ju-ae Hwang ) , 이정호 ( Jeong-ho Lee ) , 박준성 ( Jun Seong Park ) , 최종렬 ( Jong Ryeol Choe ) , 이동길 ( Donggil Lee ) , 김형수 ( Hyeongsu Kim )

발행기관 : 한국수산과학회 간행물 : 한국수산과학회지 54권 4호 발행 연도 : 2021 페이지 : pp. 418-425 (8 pages)

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The effects of an aquaponic system based on biofloc technology (BFT-AP) were analyzed for eel Anguilla japonica as aquaculture species and caipira Lactuca sativa as the cultivated crops. The rate of weight gain rate by the eels was 178% (BFT-AP 200 head) > 136% (BFT-AP 100 head) > 100% (BFT). The eel body weight in the BFT-AP (200 head) significantly increased when compared to the BFT only eel group (P< 0.05). The weight of the upper layer of caipira was 91±8.5 g (200 head) > 90±8.9 g (100 head) > 48±8.3 g (Hydroponic crop, HP). The crop growth in all BFT-AP groups was higher than the control, the hydroponic group. The total ammonia nitrogen (TAN) and NO2 --N concentrations decreased in the BFT-AP group when compared to the BFT group. It was possible to remove nitric acid from the aquaponics system and reuse it as eel rearing water. Although some nutrient concentrations were low in BFT when compared to HP, the nutrient concentration was sufficient for plant growth. The results show that BFT has the potentially to provide a sustainable aquaponic system.

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8대왕붉바리 치어(Epinephleus akaara♀×E. lanceolatus♂)의 생존, 성장 및 생리학적 반응에 미치는 염분의 영향

저자 : 신윤경 ( Yun Kyung Shin ) , 최영재 ( Young Jae Choi ) , 길현우 ( Hyun Woo Gil )

발행기관 : 한국수산과학회 간행물 : 한국수산과학회지 54권 4호 발행 연도 : 2021 페이지 : pp. 426-433 (8 pages)

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This study aimed to determine the appropriate salinity condition for optimal cultivation of the juvenile hybrid grouper Epinephleus akaara♀×E. lanceolatus♂ in conditions of decreasing salinity. The survival, growth, metabolic rate, stress, and histological response were investigated in juvenile hybrid grouper exposed to different salinities for 30 days. At 0 psu, the survival rate of the juvenile hybrid grouper was 60% on the 2nd day of exposure and all individuals died on the 3rd day of exposure. At salinities above 3 psu, all animals survived throughout the exposure period. Growth rate for body weight of the juvenile hybrid grouper was the highest in the control and the lowest at 10 psu. Plasma osmolality of the juvenile hybrid grouper exposed to different salinities was 313-355 mg Osmol/kg at salinities above 10 psu, and then decreased to 225-264 mg Osmol/kg at salinities below 5 psu. The oxygen consumption rate tended to decrease as the salinity decreased. Stress responses of the juvenile hybrid grouper were analyzed with decreasing salinity. Therefore, it is considered that a salinity of more than 20 psu is suitable for the culture of the juvenile hybrid grouper.

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9통영-거제해역 수하연 양식 참굴(Crassostrea gigas)의 비만도 장기변화와 영향 요인 고찰

저자 : 심정희 ( Jeonghee Shim ) , 이상준 ( Sang Jun Lee ) , 구준호 ( Jun-ho Koo ) , 정래홍 ( Rae Hong Jeong )

발행기관 : 한국수산과학회 간행물 : 한국수산과학회지 54권 4호 발행 연도 : 2021 페이지 : pp. 434-444 (11 pages)

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The decrease in fatness of the Pacific oyster Crassostrea gigas, which consequently results in decrease in the profit of aquaculture industry, has become a source of serious concern in southeast coast of Korea. The ratio of flesh (edible portion) to total oyster weight, commonly called edible portion yield (“suyul” in Korean), have been used as a fatness index for the healthy and valuable state of oyster from the early stage of oyster farming in Korea. More than 360 data sets were collected from early culturing periods (in the 1970s) to the present from approximately 15 published literatures to evaluate the long-term fatness trend of oyster, reared particularly in submerged longline culturing system in Gyeongsangnam-do province. Slight decrease in oyster fatness during the 1970s to 1990s was detected in Tongyeong and Geoje Bays; however, from the 1990s to the present, clear decreasing trends were observed with a decrease of 0.04-0.08% year-1, especially during harvest season. Oyster mass production per unit area almost doubled within a short period in the early 2000s; however, changes in coastal environment factors inhibited the fattening of shellfish from the mid 1990s. These results indicate that the severe competition in feeding and low biological production in water column might be some convincing reasons for the decrease in fatness of oyster from the 1990s, in Tongyeong and Geoje Bays, Korea.

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10한국 남해 동물플랑크톤 군집 구조의 계절 변동

저자 : 이예지 ( Ye Ji Lee ) , 이정훈 ( Jeong Hoon Lee ) , 김영혜 ( Yeonghye Kim )

발행기관 : 한국수산과학회 간행물 : 한국수산과학회지 54권 4호 발행 연도 : 2021 페이지 : pp. 445-455 (11 pages)

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We aimed to study the structure of the zooplankton community in the Southern Sea of the Republic of Korea. Zooplankton samples were collected in February (winter), May (spring), August (summer), and November (autumn) of 2020. The zooplankton collected belonged to a total of 166 taxa and 12 phyla, including some unidentified individuals and those from upper taxa. The number of taxa collected were the highest in winter at 117, and the lowest in May at 93. The dominant taxa were Oikopleura spp. in the winter, Gastropoda larvae in the spring, and Paracalanus parvus s.l. in the summer and autumn. The community structure of the zooplankton was clearly distinguishable between the seasons. The mean density of zooplankton was the highest in autumn and the lowest in summer (576,039 and 313,000 individuals/1,000 m3, respectively). Based on the analysis of relationships between the density of the six major taxa and environmental factors, a significant correlation (P<0.05) between the four taxa and environmental factors was found. Therefore, in order to understand changes in the zooplankton community, quantitative and qualitative investigations of biological factors as well as physical factors should be conducted.

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