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LED와 메탈핼라이드 집어등을 겸용한 갈치채낚기 어선의 조업 성능
안희춘 ( Heui Chun An ),배봉성 ( Bong Seong Bae ),이경훈 ( Kyoung Hoon Lee ),박성욱 ( Seong Wook Park ),배재현 ( Jae Hyun Bae ) 한국어업기술학회 2012 수산해양기술연구 Vol.48 No.4
One of representative Korean fisheries, jigging and angling has 5,700 vessels for squid and hairtail. Hairtail angling is the most typical fishery in Jeju and has an enormous impact on regional economy. However, the price hike in oil and labor costs triggered the necessity of developing a high efficient and energy saving fish luring lamp in recent times. For that reason, this study aimed to analyze the fishing performance of the aircooled LED lamp targeting hairtail angling fishery. The experiment was conducted from September through October in 2009-2011 for a 9.77 ton of fishing vessel setting up 100 lamps. The fishing performance was tested compared with 6 vessels using metal halide lamps in the same waters. As the LED lamp´s performance goes up, different lamps were used in 2008 for 80W, 2009 for 120W and 2011 for 180W respectively. The catch and CPUE of the experimental vessel have gradually increased respectively taking the 4th and 6th place in 2009, the 4th and 2nd place in 2010, the 1st and 1st place in 2011 among the 7 vessels. In summary, the LED fishing lamp showed higher fishing performance than comparison groups. It saved 33% of oil consumption and cut down on operating expenses and greenhouse gases emission.
LED (Light-Emitting Diode)를 이용한 미세조류 (Chaetoceros calcitrans)의 성장 및 생화학적 조성 변화
안희춘 ( Heui Chun An ),배재현 ( Jae Hyun Bae ),권오남 ( O Nam Kwon ),박흠기 ( Heum Gi Park ),박진철 ( Jin Chul Park ) 한국어업기술학회 2014 수산해양기술연구 Vol.50 No.4
The marine microalgae Chaetoceros calcitrans was cultured under a fluorescent lamp (CON) and light-emitting diodes (LEDs) of various wavelengths (blue, LB; red, LR; green, LG; white, LW); changes in growth, fucoxanthin, chlorophyll-a, amino acid and fatty acid profiles were investigated. LR-exposed cultures exhibited the highest specific growth rate (SGR) (0.34), whereas LG-exposed cultures showed the lowest SGR (0.26). After cultivation for 10 days, the maximum dry cell weight (g/L) of LR-exposed cultures was significantly higher than that of those exposed to other light conditions (LR. CON>LB.LW.LG). Eicosapentaenoic acid (EPA) levels were significantly higher in CON-exposed cultures compared to those exposed to LW (P<0.05), with no marked difference compared to those exposed to LB, LR and LG (P>0.05). The fucoxanthin content was highest in LB-exposed cultures (6.3㎍/mL), whereas LW showed the lowest (3.6㎍/mL; P<0.05). Chlorophyll-a content was highest in cultures exposed to LB compared to other light sources. These results suggest consistent differences in growth and biochemical composition after exposure to light of different wavelengths.
강릉해역 접시조개(Megangulus venulosus)의 연령과 성장
안희춘 ( Heui Chun An ),홍성익 ( Sung Eic Hong ),배재현 ( Jae Hyun Bae ),김재원 ( Jae Won Kim ),윤병선 ( Byoung Sun Yoon ) 한국어업기술학회 2015 수산해양기술연구 Vol.51 No.4
본 연구는 2014년 1월부터 12월까지 강원도 영진 연안에서 패류형망에 의해 채집된 접시조개의 패각을 이용하여 연령과 성장특성을 조사하였다. 접시조개의 윤문형성시기는 9-10월에 연 1회 형성되는 것으로 추정된다. 이론적 최대각장(SL∞)은 236.3 mm, 성장계수(k)는 0.061/year의 값을 얻을 수 있었다. 또한 각장이 0일때의 이론적 연령 t0 는 -0.184 year로 추정되었다. 따라서 접시조개의 각장과 연령과의 성장식은 SLt= 236.3(1-e-0.061(t+0.184)) 으로 나타났다. To investigate the characteristic of age and growth, samples of Megangulus venulosus were collected monthly by dredge in the coastal waters of Gangneung, Korea from January to December 2014. The age of M. venulosus was estimated by measuring the ring radius on the shell. Because the relationship between shell lengths and ring radii in each ring group was regressed well, each ring was considered as an annual growth ring. Based on the monthly variation of the marginal index (MI) of the shell length, it is assumed that the ring of this species was formed once a year during September and November. From the parameters calculated using the average length when the year ring was formed, the estimated von Bertalanffy growth equation were SLt=236.3(1-e-0.061(t+0.184)) in age.
한국 동해 연안에 내유한 산란기 도루묵, Arctoscopus japonicus의 행동습성
안희춘(Heui-Chun AN),이경훈(Kyoung-Hoon LEE),이성일(Sung-Il LEE),박해훈(Hae-Hoon PARK),배봉성(Bong-Seong BAE),양재형(Jae-Hyeong YANG),김종빈(Jong-Bin KIM) 한국수산해양교육학회 2011 水産海洋敎育硏究 Vol.23 No.1
Behaviour habitats of sailfin sandfish, Arctoscopus japonicus, one of the stock recovery species of Korea, were investigated when they were approaching toward the eastern coastal waters of Korea during spawning season. Underwater surveys were conducted in December, 2009 at Jug-island, Goseong, Gangwon-province to observe the behaviour of sailfin sandfish by underwater video camera and underwater camera, and the body characteristics of sailfin sandfish caught by gillnet were measured. It was observed that the species generally move in school but a few of individuals go out of the school to approach and dig into the sand bottom. Eggs of sailfin sandfish were shown in many cases to be attached to seaweed like Sargassum fulvellum and Zostera mairna. The females maintain its body in horizon and shake the body to breed eggs. It was also observed that the males spray sperm on the eggs attached on seaweed. Sailfin sandfish is assumed to make diurnal migration by moving to the shallow coast at night for spawning and fertilization, and moving out to the offshore at sunrise.
안희춘 ( Heui-chun An ),배재현 ( Jae-hyun Bae ),박창두 ( Chang-doo Park ),박종명 ( Jong-myung Park ),홍성익 ( Sung-eic Hong ),윤병선 ( Byung-sun Yoon ),김병관 ( Pyungkwan Kim ),김성훈 ( Seong-hun Kim ) 한국어업기술학회 2017 수산해양기술연구 Vol.53 No.1
Fishing pots are one of the important fishing gears in our coastal and offshore fisheries. In terms of a sustainable use of marine resources, there are concerns about the ghost fishing by lost pots. It is reported that 10 to 70% of the pots are abandoned or lost annually. This study is to compare the catching efficiency of drum type whelk pots that are made of biodegradable nets to those made of the ordinary nets, in the eastern coast of Korea. Five types of drum pots were used with combination of biodegradable nets and ordinary (PA, PE) nets applied to the main and funnel parts of the pots: pots with biodegradable nets (Bio+Bio); pots with PE net (PE+PE); pots with body and funnel made of biodegradable nets and PE nets respectively (Bio+PE); pots with body and funnel made of PE nets and PA nets respectively (PE+PA); pots with body and funnel made of PE nets and biodegradable net respectively (PE+Bio). Field experiments were conducted from June 18<sup>th</sup>, 2015 to August 7<sup>th</sup>, 2015 using a commercial fishing vessel in the Uljin waters on the eastern coast of Korea. Two fleets of pots with one hundred in each, 20 pots of each type, were casted for 8 to 15 days to analyze their catching efficiency. The catch of target species, whelks, was 202,563.0 g with catch rate of 38.7% of the total catch, while the bycatch was 320,709.7 g with the rate of 61.3% of the total catch. The catch of whelks was the highest in the Bio+PE pots (46,020.3 g), followed by the Bio+Bio pots (42,027.5 g), the PE+Bio pots (41,849.9 g) and the lowest being PE+PE pots (38,054.2 g). Compared to the conventional pots, the pots with biodegradable nets on the body or entrance part had slightly higher catch rate for both the target species and the bycatch. The PE+PE had the lowest catch rate. There is no significant difference in catch between the pots with biodegradable nets and the ordinary nets for the target species such as Buccinum opisthoplectum, Neptunea eulimata, Buccinum striatissimum. Consequently, using biodegradable nets for the conventional whelk pots can reduce ghost fishing by lost gears while keeping the performance of the pots.
강릉 연안에서 형망의 갈퀴 간격 및 망목 크기에 따른 어획 생물의 종조성 및 군집 분석
안희춘 ( Heui Chun An ),배재현 ( Jae Hyun Bae ),박종명 ( Jong Myung Park ),박창두 ( Chang Doo Park ),홍성익 ( Sung Eic Hong ) 한국어업기술학회 2014 수산해양기술연구 Vol.50 No.4
The dredge gear is dragged along the bottom of the sea to catch targeted edible bottom dwelling species. Species composition and ecological index of the catches of dredge were estimated around Gangneung coastal fishing ground by dredge with different mesh size and tooth space from July to December 2013. Eight different types of dredge including four different tooth space (24.7 mm, 29.9 mm, 34.9 mm, 40.1 mm) and four different mesh size(15.5 mm, 32.7 mm, 51.1 mm, 60.0 mm) were used in the experiment. During the experiment, total catches were collected 31 species as sipunculida 1 species, mollusca 13 species, annelida 3 species, arthropoda 8 species, echinodermata 4 species and others 2 species. The dominant genus were mollusca and echinodermata while the dominant species were Megangulus venulosus, Pseudocardium sachalinensis, Schaphechinus brevis. The richness index was ranged 1.29-1.72, evenness index was 0.6-0.65 and diversity index was 1.65-1.83 according to the tooth space and mesh size of dredge. Richness index, diversity index were high at tooth space 34.9 mm dredge and ecological index showed decreasing tendency with the increasing of mesh size of dredge. Cluster and MDS analysis, based on a Bray-Curtis and similarity matrix of fourth root transformed data of number of species and wet weight, showed division into four different groups as four different tooth space (Group A), four different mesh size Group B (51.1 mm, 60.0 mm), Group C (32.7 mm) and Group D (15.5 mm).
부착조류 파판배양 시 Light Emitting Diodes (LEDs)의 적용
안희춘 ( Heui Chun An ),배재현 ( Jae Hyun Bae ),김미경 ( Mee Kyung Kim ),박진철 ( Jin Chul Park ),박흠기 ( Heum Gi Park ),권오남 ( O Nam Kwon ) 한국어업기술학회 2014 수산해양기술연구 Vol.50 No.4
We investigated biomass, diatom species and fucoxanthin contents as cell growth, fatty acid and amino acid contents as nutritional composition of diatoms attached on plate to confirm effects of light emitting diodes (LEDs) due to block off natural light. In the single LED irradiation, biomass showed significantly higher to 30.0±6.48mg/m2 in white LED than that of others (P<0.05). The dominate diatom species was Navicula cancellata. Their lipid contents showed significantly higher to 112.9±19.23ug/mg dry matter (DM) in control than that of others LEDs. But eicosapetaenoic acid (EPA) contents showed significantly higher to 3.3±0.62ug/mg DM than others, but not significantly differed with natural control light treatment (P<0.05). And total protein contents are higher in control and blue LED light than that of others, but essential amino acid contents showed significantly higher to 3.2±4.8% in control (P<0.05). In mixing light with natural and LED light, biomass showed 2.6±0.22mg/m2 in blue LED (P<0.05). Fatty acids contents were not significantly differed with all treatments. Amino acid contents showed to 11.0±0.33ug/mg DM in white LED (P<0.05), but not significantly differed with others LED lights (P>0.05). Therefore, we could suggest that irradiation of blue LED in natural light very benefit to diatom culture for larvae of sea cucumber and abalone and do on.
LED와 메탈핼라이드 집어등을 겸용한 오징어채낚기 어선의 조업 성능
안희춘 ( Heui Chun An ),배재현 ( Jae Hyun Bae ),배봉성 ( Bong Seong Bae ),박종명 ( Jong Myung Park ) 한국어업기술학회 2013 수산해양기술연구 Vol.49 No.4
Fishing efficiency of the squid jigging vessel using the LED and metal halide fishing lamp combination was analyzed to reduce the cost for fishing operation utilizing the fishing light system for high degree of efficiency in the squid jigging fishery (one of the representative coastal and offshore fisheries in Korea). This study aims to improve the nature of existing LED lamps and to develop fan-shaped LED lights having 180W of power and ±45° angle of light intensity distribution. The marine experiment for making a comparison of their fishing efficiency was tested by a 9.77 t fishing vessel from Oct. through Dec. 2012. As a result, experimental fishing vessel showed slightly higher fishing efficiency than the average of metal halide lamp-equipped vessel and 20% energy savings. This means that the combination of LED and metal halide lamps would provide an efficient way to lower energy consumption while maintaining fishing efficiency.
동해안 울진해역 원통형과 장구형 고둥통발의 혼획 및 투기 실태
안희춘 ( Heui Chun An ),배재현 ( Jae Hyun Bae ),박종명 ( Jong Myung Park ),홍성익 ( Sung Eic Hong ),김성훈 ( Seong Hun Kim ) 한국어업기술학회 2014 수산해양기술연구 Vol.50 No.4
Experiment was set up to analyze bycatch and discards situation including snow crap Chionoecetes opilio of whelk trap. Four types of trap were used: drum type trap with PE net; drum type trap with PBS net; cylinder type trap with PE net; and cylinder type net with PBS net. Three funnels were attached in drum type trap and two funnels were used in cylinder type trap. A fleet of traps was consisted with one hundred traps. 25 traps of each type were set on a line in repeated sequence. Field experiments were conducted with 6 fishing operations in the Uljin waters, East Sea in July 2014. Catch of target whelks were 173,261 g and catch rate was 48.7% of total catch, while bycatch were 182,571 g, 51.3% of tatal catch. The catch rate of bycatch was 2.6% higher than that of target catch. Bycatch weight of snow crap was the highest as 142,987 g and formed about 40.2% of total catch, followed giant octopus, Enteroctopus dofleini, 31,762 g (8.9%). Bycatch rate of cylinder type trap was 2.3 times higher than that of drum type trap. Discard rate (discard/(discard+landing)) was 43.6%. Discard rate was the highest at cylinder type trap with PBS net as 63.1%, followed cylinder type trap with PE net as 47.9%, drum type trap with PE net as 33.4%, the lowest at drum type trap with PBS net as 22.1%.