• Title, Summary, Keyword: 집어등

Search Result 76, Processing Time 0.043 seconds

꽁치봉수망 집어등 불빛의 수중 투과 특성

  • 조현수;김두남;조영복;이주희;김형석;양원석;안희춘
    • Proceedings of the Korean Society of Fisheries Technology Conference
    • /
    • /
    • pp.71-74
    • /
    • 2003
  • 주광성이 있는 어족을 밀집시켜 어획하기 위하여 사용되는 집어등은 어류 중 불빛에 유집이 잘 되는 멸치, 오징어 및 꽁치 둥을 대상으로 하는 어업에서 주로 사용된다. 어장에 분산되어 있는 어류에 집어등을 투사하면, 농밀하게 어군을 형성하게 되므로 효과적인 어획이 가능하게 된다. 본 연구에서는 꽁치봉수망 조업시 어선의 집어등에 의한 수중 환경의 변화를 구명하여 광환경이 꽁치의 어획에 미치는 영향을 분석하기 위한 기초 단계로 꽁치봉수망 어선의 집어등 수중 조도를 측정하여 꽁치가 분포하는 어획수심의 광환경을 분석하였다. (중략)

  • PDF

Study on the Gathering Effects of Anchovy Scoop Net in the neighboring waters of the Cheju Island (제주도 근해 멸치 분기초망의 집어효과에 관한 연구)

  • SOHN Tae-Jun
    • Korean Journal of Fisheries and Aquatic Sciences
    • /
    • v.21 no.3
    • /
    • pp.184-192
    • /
    • 1988
  • Anchovy, Engraulis Japonica were caught by scoop net with fishing lamp in the surrounding water of Cheju and Seogwipo, and their gathering depth, gathering effects, change of catch by the age of the moon and submarine illumination were investigated from May to August 1985. Fish finder (SR-385) and fishing lamp (1 Kw incandescent) were set up at one meter of starboard of scoop net and one meter ahead of the prow together with two meters above the water surface respectively. The submarine illumunation was measured at 2m interval to both vertical direction of 0~18m and horizontal direction of 0~12m form the standard point which is to be 0.1m depth right under the fishing lamp. The catch of anchovy by scoop net was almost $90\%$ of total amount during the early period and the late period in moon age while as low as $10\%$ only was cought during the middle period. The catching depth of anchovy shoals by scoop net with fishing lamp was approximately 2~5m and submarine illuminations were 20~42 Lux, 24~48 Lux in Cheju and Seogwipo respec lively. Submarine illumination which could be cought by scoop net with fishing lamp should be 7~12 times lighter than before gathering since the shoals swiming at 10~15m depth which is 1.7~7 Lux illumination made by 1 Kw. AC 100V incandescent lamp, a surface gathering lamp of 2m high above anchovy scoop net came up to 2~5m depth which is 20~42 Lux illumination. The catching depth of anchovy by scoop net was 2~3m and this could be increased to 4m even though the AC voltage was decreased from 100V to 80V at final fishing stage.

  • PDF

Relationship Between the Boat Sizes, tight Source Output for Fishing Lamps and the Catch of Squid, Todarodes pacificus STEENSTRUP, in Coastal Squid Jigging Fishery of Japan (일본 소형 오징어 채낚기 어선의 톤수 및 집어등 광원 출력과 어획량과의 관계)

  • Choi Sok Jin
    • Korean Journal of Fisheries and Aquatic Sciences
    • /
    • v.35 no.6
    • /
    • pp.644-653
    • /
    • 2002
  • Sizes of coastal squid jogging boats, their light source output for fishing lamps and daily catch data were collected, for a purpose of evaluating factors on fishing boats, which affect to the squid catch, from four fishing ports (Hakodate, Sado Island, Noto and Tsushima) in Japan. The catch amount was increased as boat sizes and their light source output of fishing lamps were increased up to 100$\~$200 kW class and 11$\~$15 gross tonnage class. The relationship between catch per unit efforts y (box/machine/day), gross tonnage x_{1}, (GT) and light source output for fishing lamps x_2 (kW) is expressed as following formula; $y=4.091+0.18x_1+0.0019x_2$. Thus, 0.1819 boxes of squid catch can be expected, when light source output for fishing lamps increases for 1 kW $(x_2{\leq}200)$ and boat size 1 GT ($x_1\leq15$). It is considered that the boat size which created a shadow area under the jigging boat, is important factor affecting to catch amount, Because larger shadow area created by bigger boat has a possibility to let more squid stay there.

제주도 연안 갈치 채밖기의 연속식 자동어구 어법 개발 3. 연속식 채낚기 어구의 해상실험

  • 서익조;오승훈;이창헌;박용석;김석종;서두옥
    • Proceedings of the Korean Society of Fisheries Technology Conference
    • /
    • /
    • pp.53-54
    • /
    • 2001
  • 제주도 연근해에서는 소형선박으로 수동식 채낚기 어구와 선상 집어등으로 갈치를 유집하여 어획하고 있다. 총톤수 10톤의 갈치 채낚기 어선에는 6명의 선원, 수입산 냉동미끼, 대출력의 선상 집어등 등 조업경비의 지출이 심하여 조업선원의 감소를 할 수 있는 연속식 채낚기 어구 개발, 대출력 선상 집어등을 소출력의 수면 집어등, 어육미끼를 인공미끼로 대체하는 것이 절실하게 요구되고 있다. (중략)

  • PDF

The Optical Characteristics of 240 W High Power LED Fish Luring Lamp (240W급 고출력 LED 집어등의 광학적 특성)

  • Bae, Jae-Hyun;An, Heui-Chun;Kim, Sang-Woo
    • Journal of the Korean Society of Marine Environment & Safety
    • /
    • v.19 no.6
    • /
    • pp.681-687
    • /
    • 2013
  • This study analyzed characteristics of 240 W high power LED lamps by comparing with those of traditional metal halide lamps. In addition, it analyzed the propriety of LED lamps as a source of light, considering seawater transmission characteristics. When Applying white LED package with the color temperature color temperature of 6500K, a 240W-LED fishing lamp has a characteristics of the luminous angle to be expanded to ${\pm}45^{\circ}$, the illumination change was improved to 0.8, as well as the luminance efficiency was improved to 98.8lm/W. As results of comparison between one 1,500W-metal halide lamp and four 240W-LED lamp with considering a seawater transmission and a luminous efficiency of scotopic vision, the radiant flux of two lamps were almost equal level at 50m depth and the luminous flux was 5% higher LED lamp than metal-halide lamp even if only applying the luminous efficiency of scotopic vision. As the luminous flux of LED lmap was 14% higher than that of metal-halide lamp with applying the luminous efficiency of scotopic vision to radiant flux at 50m depth, so LED fishing lamp was verified to alternative possibility of metal-halide lamp.

제주도 연안 초망어선의 소음에 관한 연구

  • 박성욱;서익조;오승훈;이창헌;최찬문;서두옥
    • Proceedings of the Korean Society of Fisheries Technology Conference
    • /
    • /
    • pp.67-68
    • /
    • 2001
  • 멸치를 어획하는 주 어구인 초망어업은 우리나라 남해안과 제주도 연안에서 행해지는 고유어법으로서, 이러한 초망어업은 큰 챗대 1개와 작은 챗대 1개는 반 기계적으로, 콧대 1개와 그물작업은 인력으로 조작되고 있는데, 멸치어군의 집어는 집어등을 선수 전방에 설치하여 2-3노트의 속력으로 항해하면서 멸치어군을 표층으로 부상시킨다. 이때 집어등만으로 멸치어군이 표층으로 부상하지 않으면 쇠파이프로 어선의 외관을 두드리거나 또는 기관 회전수를 빠르게 하여 공회전 시키면서 수중 소음을 발생시켜 멸치어군을 표층으로 유집시킨다. (중략)

  • PDF

Design and Fabrication of an Energy Saving LED-Fishing Lamp (에너지 절감형 LED 집어등의 설계 및 제작)

  • Choi, Sung-Kuk;Kim, Sun-Jae;Park, Dae-Won;Kil, Gyung-Suk;Choi, Chul-Young;Song, Sang-Bin
    • Journal of the Korean Society of Marine Engineering
    • /
    • v.34 no.4
    • /
    • pp.515-521
    • /
    • 2010
  • This paper dealt with the design and fabrication of an energy saving light emitting diode (LED) fishing lamp. Most fishes such as a squid, horse mackerel, mackerel, sardine and scabbard fish have characteristics for phototaxis and fishing lamps have promoted the fishery efficiency using their photo-reaction. In these days, metal halide lamp (MHL) as the fishing lamp, which consumes 1.5 kW and radiates harmful ultraviolet rays are mainly used. To develop the LED-fishing lamp, the penetration depth in sea water and the photo-reaction of a squid as light wavelength were studied. The experimental results showed the both characteristics were existed in blue color around 470 nm. Based on the results, we manufactured a 160 W and blue LED-fishing lamp which is consume about one-nine of 1.5 kW MHL. As energy saving effect, the use of LED-fishing lamp can reduce 128 kWh per an hour which is correspond to $CO_2$ of 86 kg for a 22ton-fishing boat equipped with 80-1.5 kW MHL. Now, the prototype LED fishing lampsare being evaluated on two fishing boats.

Irradiance Distribution Analysis of a Squid Jigging Vessel Using an LED Plus Metal Halide Fishing Lamp Combination Under Optimized Conditions (메탈할라이드와 엘이디 오징어 집어등의 겸용시 배치조건에 따른 수중조도분포 비교분석)

  • Jung, Mee Suk;Lee, Ki Dae;Ko, Jae Seok;Bae, Jae Hyun
    • Korean Journal of Optics and Photonics
    • /
    • v.25 no.6
    • /
    • pp.315-325
    • /
    • 2014
  • A combination of MHL and LED fish-luring light is used in this study. Its yield, characteristics, and irradiance distribution are evaluated and analyzed. To obtain an irradiance distribution similar to that of an MHL, we suggest the optimal arrangement of MHL and LED.

Transmittance Characteristics of Fishing Lamp in the Anchovy Scoop Fishery (멸치초망어업용 집어등 광력의 수중 투과특성)

  • 박성욱;배봉성;안희춘;서두옥
    • Journal of the Korean Society of Fisheries and Ocean Technology
    • /
    • v.37 no.2
    • /
    • pp.117-123
    • /
    • 2001
  • Anchovy scoop nets, a kind of lift net have been used in the coastal area of Cheju and South sea of Korea. An incandescent lamp(AC 100V, 1kW) is being used as a fishing lamp for gathering anchovy. Fishing lamp was installed at 1m ahead of the prow and 1.5m higher than the water surface. The fishing lamp let fish school rise to the water surface and attract to bag net. Accordingly, a successful anchovy catching depends on controling of fishing lamp. On the study, the distribution of spectral irradiance illumination of incandescent lamp(1kw) and the irradiance efficiency of reflection plate were analyzed and discussed to investigate the ability of fishing lamp which can attract anchovy school effectively. The results obtained are summarized as follows : 1. Around 180% of irradiance efficiency of incandescent lamp was increased by using the reflection plate. The light of lamp was radiated into water with circular shape. 2. The irradiance illumination of incandescent lamp in air was a maximum in wave length of 994nm but it was 690nm at 0.5m and 1.0m of water depth. 3. The relationship between water depth(x) and water illumination(y) of vertical light is represented as follows : y=146.03e supper(-0.37x) 4. The light of incandescent lamp(1kW) pass through much better into vertical direction than horizontal but it was estimated that the light was not able to reach depth of 20m.

  • PDF