Byung-Yeob Kim

Estimation of demersal fish biomass using hydroacoustic and catch data in the marine ranching area (MRA ) of Jeju

Hybrid surveys using hydroacoustic and fish sampling gears such as trammel net , trap were conducted toinvestigate total biomass , distribution and dominant fish species of the demersal fishes in the marineranching area (MRA ) of Jeju . Four surveys were carried out in June , August , October and November using38 kHz quantitative echo sounder . Catch data using trammel net and trap were used to calculate biomass andto examine dominant fish species . Fish schools were mainly detected in the waters of 20 meters below andaround Chagwido waters . By the result of fishing experiments , fish species living in MRA of Jeju wereabout 40 species , dominant fish species of a detectable fish such as Family Sparidae and FamilyMonacanthidae etc . were identified 59.4~68.8% of total biomass . Based on the hydroacoustic data , fishlength -weight function and target strength information , mean density of the demersal fish estimated were as

Target strength estimation of dominant species in marine ranching ground of Jeju coastal water by KRM model

The indirect target strength (TS) estimation method which uses the Kirchhoff ray mode model (KRM model) was discussed to apply for a biomass estimation in the water of mixed species. TS of 25 live scorpion fishes for 120kHz were measured by a tethered method and of others dominant 5 species in the marine ranching ground of Jeju coastal water including a scorpion fish were also estimated by KRM model. The measurement TS of scorpion fish well agreed with the theoretical values and the standard formula of scorpion fish was estimated as

Characteristics of lost fishing gear distribution on the sea bed around gillnet fishing ground for yellow croaker in the near sea of Jeju, Korea

TS_{120kHz}

Hooking rate and bait loss rate of traditional hairtail hand line according to immersion time in the coastal waters of Jeju

T23= :+:/ /. 98 >2/ .3=> 398 +8. >2/ -97:9=3>398 90 69=> 03=2381 1/+ 2/ =/+ ,/.+ 2/ 8/+ 9 O->9,/ 937: 2/ 03=2/ . R/-9@/ 03=2381 1/+ >9>+6 10 >37/= A3>2 +> +6981 >2/ 3=9,+>2 . A= >2/ , 3> =//7= 9 -98-6?./ >2+> >2/ +79?8> 90 69=> 03=2381 1/+ 398 A3>2 >2/ .3: 90 >2/ =/+ ,/. += A/66 += >2/ 03=2381 1/+ 90 03=2381 1/+ =, . 3-?6+ /@/ 37/ A3>238 >2/ =? 03=2381 1/+ 2 , R/-9@/ 03=2381 1/+<=

A basic study on the improvement of the continuous type fishing system for largehead hairtail hand line in coastal area of Jeju island, Korea

This paper is to investigate the effect of the immersion time in the traditional hairtail hand line fordeveloping the fishing methods and the fishing gear in the coast of jeju. The operating of 32 times was madewith each different immersion time of hairtail hand line, and the relations between the catch and theimmersion time were examined. As the result, targeted species rate was over 98% of total catch. From about800 seconds after casting, the hooking rate was decreased and the bite loss rate was increased, it seems to bemade by the decreasing factors of predators including the cutting of branch lines etc. In addition, it wassupposed that the hooking rate and the bait loss rate had a deep connection with feeding time zone. The levelof the correlation coefficient of the bait loss rate according to the immersion time was 0.54 at p 0.01, in thecase of the hooking rate, 0.59 was chosen after about 800 seconds. The hooking rate and the bait loss rateaccording to the hook number were not irrelevant to the fish school layer. Additionally, it was assumed thatthe bait loss rate was related to the depth of water.Key words : Hairtail hand line, Hooking rate, Bait loss rate, Immersion time

Long-term variation in catch of Spanish mackerel (Scomberomorus niphonius) related to environmental change in Korean waters

This experimental study was carried out to obtain the base data for saving the man power in the fishingoperation of largehead hairtail hand line by using the continuous type hand line system with a rotary devicewhich could make a main line move automatically. In order to solve the twists and entangling on the mainline happened during operating test, the resistance board was suspended at the end of the main line at sea. Asthe result, there were no problems of tangling and so on due to up and down moving of a main line.According to the control of a fixed angle of guide roller, it was possible to prevent the main line to beseparated from a side roller and a guide roller. In addition, PVC tube between a guide roller and a side rollerenabled a main line to be moved smoothly without any entanglement.Key words : Continuous type hand line, Side roller, Guide roller, Guide tube, Resistance board

Acharacteristics on the forming of fishing ground and population ecological study of Yellow tail, Seriola quinqueradiata, in the coastal waters off Gim-nyeong of Jeju Island, Korea

),and oceanic condition in Korean waters were analyzed using 40 years of time-series data from 1971－2010.In the 1990s, oceanic conditions around the Korean peninsula shifted to awarmer regime with higher SST(sea surface temperature). The totalcatch of Spanish mackerelin Korean waters increased dramatically sincethe early 2000s, and main fishing ground form into South Sea in winter season from December to January.From the results of correlation analysis, we found asignificant relationship between the Spanish mackerelcatch and environmentalfactor such as SST , common mackereland anchovy catch in Korean waters.Keywords: Spanish mackerel, Korean waters, Catch, Increase, Oceanic conditions, Warmer regime

AB0810 Macrophage Migration Inhibitory Factor in Gouty Arthritis

, between Jeju Island and coastal areas of the East Sea is probably thesame. Water temperature probably is amajor factor for controlling distribution of yellowtails in deeper, off-shore areas off Jeju Island. However, the major factor that determines aggregation of yellowtails in coastalareas of Jeju Island, especially off Gim -nyeong is probably strong tidal currents driven by distribution ofyellowtails rather than hydrological conditions such as Yellowtails collected off Jeju Island were from 1 to4yrs old and about 50% of them were 1

AB0841 Predictors of Physical Function & Quality of Life in Patients Scheduled for Total Knee Arthroplasty

Background Macrophage migration inhibitory factor (MIF) is proinflammatory, angiogenic and tissue degrading cytokine. Objectives This study aimed to determine monosodium urate (MSU)-induced MIF production and the role of MIF in gouty arthritis. Methods Peripheral blood and clinical data were obtained from 98 patients (31 patients with acute gouty arthritis and 67 patients with intercritical gout). Synovial fluid (SF) was obtained from patients with acute gouty arthritis and SF white blood cells and neutrophils were counted. SF and serum levels of MIF, interleukin (IL)-1, IL-8 and leukotriene B4, were measure using enzyme-linked immunosorbent assay (ELISA) and their relationship was analyzed. Peripheral blood mononuclear cells (PBMC) were isolated and cultured with MSU crystal, the production of MIF was determined. Results SF MIF level was higher in acute gouty arthritis than osteoarthritis. Serum MIF was higher in patients with intercritical gout than patients with acute gouty arthritis or healthy volunteers. SF MIF level was positively correlated with SF WBC and neutrophil counts, IL-1b and IL-8 levels in acute gouty arthritis. Serum MIF level was correlated with IL-1b and IL-8 levels in patients with intercritical gout. MSU crystal induced MIF production in PBMC with maximal effect at 100mg/ml. Conclusions MIF was highly produced in gouty arthritis and MSU induced MIF production. MIF could be involved in early inflammatory process in acute gouty arthritis. Acknowledgement This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science, and Technology (NRF-2013R1A1A1008171). Disclosure of Interest None declared

Fishing characteristics of small yellow croaker drift gill net by net height

Background Knee osteoarthritis (OA) is among the most common joint disease and is therefore a major social and health problem. Clinically, the knee OA is characterized by joint pain, tenderness, limitation of movement, and variable degrees of local inflammation. Objectives This study was undertaken to identify preoperative physical performance factors predictive of self-reported physical function and quality of life, and to propose a preoperative rehabilitation program to improve functional ability in patients scheduled for total knee arthroplasty. Methods A total of 55 older adults with end-stage knee OA awaiting a total knee arthroplasty (6 males and 49 females; average age 73.3±6.1 years) were recruited and tested preoperatively. Self-reported disease-specific physical function and self-reported pain were measured by using the Western Ontario McMaster Universities Osteoarthritis Index (WOMAC). Self-reported quality of life was measured by using EuroQOL five dimensions (EQ-5D) questionnaire. Physical performance tests included 6-minute walk test (6MWT), timed up and go (TUG) test, instrumental gait analysis for spatio-temporal parameters, and isometric knee flexor and extensor strength of the surgical and nonsurgical knees. Results In the bivariate analyses, the WOMAC function score had a significant positive correlation with the WOMAC pain score (r=0.62, p<0.001), TUG (r=0.46, p<0.001) tests, and a significant negative correlation with 6MWT (r=-0.46, p<0.001), peak torque (PT) extensor (r=-0.27, p=0.04) and PT flexor (r=-0.32, p=0.02) of the nonsurgical knee. The EQ-5D score had a significant positive correlation with 6MWT (r=0.46, p<0.001) tests, and a significant negative correlation with the WOMAC pain score (r=-0.60, p<0.001), TUG (r=-0.38, p=0.004). In the linear regression analyses after adjustment for demographics and anthropometrics variables, the WOMAC pain score (β=0.55, p<0.001) and preoperative TUG test (β=0.34, p=0.002) were factors predictive of the WOMAC function score (R2=0.49), and the WOMAC pain score (β=-0.51, p<0.001) and preoperative 6MWT test (β=0.30, p=0.008) were factors predictive of the EQ-5D score (R2=0.45). Conclusions This study demonstrated that preoperative physical performance significantly influenced on self-reported physical function and quality of life in patients scheduled for total knee arthroplasty. Because functional ability after total knee arthroplasty is strongly associated with preoperative functional ability, these results could be of importance in determining variable preoperative rehabilitation strategies, especially focusing on resistance, dynamic balance, and endurance exercises. References Schache MB, McClelland JA, Webster KE. Lower limb strength following total knee arthroplasty: A systematic review. The Knee 2014;21:12-20 Thomas SG, Pagura SMC, kennedy D. Physical activity and its relationship to physical performance in patients with end stage knee osteoarthritis. J Orthop Sports Phys Ther 2003;33:745-754 Greene KA, Schurman JR. Quadriceps muscle function in primary total knee arthroplasty. J Arthroplasty 2008;23(7):15-19 Mizner RL, Petterson SC, Stevens JE, et al. Preoperative quadriceps strengthe predicts functional ability one year after total knee arthroplasty. J Rheumatol 2005;32:1533-1539 Disclosure of Interest None declared