• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.05a
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• pp.421-422
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• 2001

우리나라의 연근해어업은 다종자원을 여러 가지 어구로 동시에 어획하는 복잡한 형태를 가지고 있다. 이러한 어업에는 대표적으로 기선저인망어업, 안강망어업, 선망 어업, 유자망어업 등이 있으며, 특히 본 연구의 대상인 선망어업의 경우 고등어, 전갱이, 정어리 둥 10여종을 동시에 어획되는 다종어업의 한 형태로 취급할 수 있다. (중략)

• Journal of Fisheries and Marine Sciences Education
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• v.10 no.2
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• pp.211-225
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• 1998

A field experiment was carried out for fishes on entering time to a set-net, swimming speed, current speed and direction at the Dongbok-Ri coast on Cheju Island. The results of the experiment are as follows : 1. The observation results from 07:00 to 18:00 showed that coral fish, flying fish, horse mackerel, drub mackerel and striped mullet enter the set-net from 07:00 to 14:00 mainly. 2. From the result of analyzing relationships between entering time and tide, coral fish and horse mackerel tend to enter the set-net on turn of tidal current and ebb respectively. 3. The leaving rates of coral fish, flying fish, drub mackerel, and striped mullet from the set-net were 13%, 45%, 50%, and 100%, respectively but all horse mackerel remained in the net. 4. The swimming speed of coral fish, flying fish, horse mackerel and drub mackerel are 5~25cm/sec, 20~50cm/sec, 15~45cm/sec and 10~30cm/sec, respectively and their dominant speeds are 10~15cm/sec(55%), 30~35cm/sec(30%), 30~40cm/sec(60%), and 15~20cm/sec(60%), respectively.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.31 no.4
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• pp.379-384
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• 1995

The retinomotor responses of jack mackerel, Trachurus japonicus and carp, Cyprinus carpio were studied for the different strobe flash frequencies in respects of the application of the light stimulus to herding and barrier system. The strobe flash frequencies ranged at 1.7, 5, 10, 25, 430Hz in jack mackerel and 1.7, 5, 25Hz in carp. The retinal adaptation ratio was examined histologically according to the time elasped of 1, 5, 10, 30min after turning on the light in each experimental condition. Cone index were determined in order to express the retinal adaptation ratio. Jack mackerel showed an increase of the retinal adaptation ratio ranging from average 27% at the pre-stimulus light to 42.6%, 49.8%, 59.8% and 83.1% at the irradiation times of 1, 5, 10 and 30min., respectively. Carp showed an increase of the retinal adaptation ratio ranging from average 28.4% at the pre-stimulus light to 51%, 53.9% and 91.3% at the irradiation times of 1, 5 and 30min., respectively. The light adaptation process was observed to be fast approximately in order of 430Hz, 25Hz, 5Hz, 1.7Hz and 10Hz for jack mackerel, and 25Hz, 5Hz and 1.7Hz for carp, and to be light-adaptated in 30 minutes.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.40 no.2
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• pp.132-137
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• 2004

In order to assess electrophysiological responses of fish, a recording of Electroretinogram (ERG) was made on the dark-adapted eyes of anesthetized jack mackerel Trachurus japonicus in the strobe-flash frequency range of 1.7~25 Hz and in the intensity range of 56~415 lx.s. The amplitude change of the ERG is highest at the moment when the strobe light is irradiated and becomes weakest soon after, then gradually increases and becomes stable. The amplitude of the ERG by strobe flash frequencies looked stable tendency after about 12~17 minutes elapsed. During the test duration of 30 minutes, the maximum of amplitude change and stimulation amount over all the tested frequencies was found at 10 Hz. The reduction of the flash intensity caused the decrease in the amplitude and stimulation amount.

• Journal of the Korean Society of Food Science and Nutrition
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• v.32 no.7
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• pp.1032-1038
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• 2003

The two-level full factorial and mixture design were used to screen ingredient type and to investigate the effects of ingredients on properties of surimi gel from jack mackerel using measurements of breaking forces, deformation values and color. The addition of starch decreased breaking force significantly (p<0.05), but did not affect deformation. The bovine plasma protein (BPP) among non-muscle proteins increased a breaking force and deformation value. However, the dried egg white increased slightly a breaking force, and decreased greatly a deformation value. The breaking force of gel was increased, but deformation value did not change significantly (p<0.05) with adding BPP. The whiteness of gel was slightly improved with the addition of corn starch and BPP. At 78% moisture, the optimum ratios of ingredients were 89.5∼90.0% for alkali surimi, 4.6∼6.0% for corn starch and 4.3∼5.4% for BPP to obtain above 110g for a breaking force, 4.2 mm for a deformation, and 22.5 for a whiteness.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.31 no.2
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• pp.153-165
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• 1995

The fluctuations of catches in set nets around Kyeongbuk Province, the eastern coast of Korea, were analyzed and investigated by on the values of CPUE(Catch Per Unit Effort per hauling), and composition of dominant species caught from 1985 to 1989. Annual CPUE values were fluctuated every year, but their trends were decreased year by year, When the values were evaluated by species, the trends of annual catches were shown decreasing in file fish(Auteridae), mackerel(Scomber japonicus), tuna(Thunnus Thynnus), rock fish(Sebastes schlegelid) and yellowtail(Seriola quinqueradiata), increasing in sardine(Sardinops melanosticta), jack mackerel(Trachurus japonicus), and herring(Clupea pallasi), and similar in squid(Todarodes pacificus) and cuttle fish(Sepiidae). The main fishing season evaluated by monthly CPUE was estimated from August to November with a little difference by regions : from August to November at Chukpyon and Kanggu, from September to November at Chuksan and Kampo, and August to December in Hupo. When the DPUE values were analyzed by species, the main fishing seasons were quite different by species. Mackerel, jack mackerel, tuna, yellowtail, and rock fish were caught mainly from September to October, file fish and squid from November to January, sardine from April to May, herring in May, and cuttle fish in April. Annual catches were shown highest level in file fish and revealed higher by sardine, jack mackerel, mackerel, squid, tuna, and yellowtail in order. But the highest catches among each species were different with seasons, and that from January to July was sardine, from November to December file fish. The main migrating seasons of file fish, mackerel, squid, tuna, and cuttle fish at Chukpyon were a little earlier than at other regions. Though the migrating seasons of jack mackerel and tuna were almost same in every regions, that of sardine were shown 3 month's difference according to regions. In the year when the warm currents were stronger than those of the normal year and their isotherms were formed from the north to south along the eastern coastal line, the annual fish catches in set net were show higher levels.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.37 no.3
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• pp.232-239
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• 2001

For the purpose of providing the basic data on the improved fishing gear and the man power saving, which contribute to enhance fishing efficiency of set net in the coast of Jeju Island, this study analyzed the catch of two fishing place for the past 3 years in order to compare the fishing efficiency between rectngular set net and pound net, which have been used for fishing with being attached to the set net fishing place in coast of Jeiu Island, Thereby the result is as follows ; 1. When using pound net, the total amount of catch during 1997 to 1999 was 2 times more than that of when using rectangular set net. 2. When using Pound net, the catch of squid, mackerel, rabbit fish and Yellow tail during 1997 to 1999 was 1.8 times more than that of when using rectangular set net.. 3. In case of rectangular set net, CPUE marked 10.1㎏ with horse amckerel, 20.5㎏ with squid, 18.0㎏ with rabbit fish and 2.2㎏ with Yellow tail, and in case of pound net, CPUE marked 57.5 ㎏ with horse mackerel, 30.0㎏ with squid, 25.0 with rabbit fish and 4.7㎏ with yellow tail, and on the whole CPUE of poind net marked higher. 4. In case of rectangular set net, the catch ratio for fishing operation marked 64% with horse mackerel, 79% with squid, 39% with rabbit fish and 14% with yellow tail, and in case of pound net, the catch ratio fishing operation marked 18% with horse mackerel, 85% with souid 40% with rabbit fish and 14% with yellow tail, and accordingly it showed the result that the catch ratio for fishing operation was higher with the case of rectangular set net, but higher with the case of pound net.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2003.10a
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• pp.59-62
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• 2003

우리나라의 선망어업은 제주도 주변해역을 중심으로 소흑산도, 대마도 동북방해역과 동중국해에서 고등어, 전갱이, 정어리 등 부어류를 주 어획대상으로 연중 조업이 이루어지며 연근해 어업 중에 그 규모가 가장 큰 중요한 어업이다. 선망어업은 다른 어범에 비하여 그물어구가 대형이고 조업방법이 복잡하며 신속한 어구의 조작이 필요한데, 선망어구의 형상은 단순하나 망지의 분량은 대단히 많다. (중략)

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.10a
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• pp.81-82
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• 2000

소형 적색육어들 (정어리, 꽁치, 전갱이 등)은 우리나라의 수산식품 가운데 예로부터 즐겨 식용하여 온 대표적 어류로써, 칼슘을 다량 함유하고 양질의 아미노산과 고도불포화지방산(EPA, DHA 등), 각종 유용 비타민 및 정미성분 등을 함유하여 영양학적으로 우수하고 그 가공처리방법에 따라서 기호성을 부여해 줄 수 있는 수산가공품의 원료로서 잠재능을 보유하고있다 (Lee et al., 1977).(중략)

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.10a
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• pp.279-280
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• 2000

고등어는 우리나라 전 해역에 광범위하게 분포하는 회유성 어종으로 주로 대형선망어업에 의해 연중 어획되며, 최근 연근해 전체 어획량의 10∼25％를 차지하는 산업적으로 중요한 어종이다. 또한 고등어는 전갱이, 정어리, 삼치, 붉은대게 와 함께 TAC 대상어종으로서 이러한 제도의 지속적인 실시를 위한 TAC산정 대상어종의 자원특성 파악이 선행되어져야 한다. 정확한 TAC추정을 위해서는 어업자원의 생물학적 특성 구명과 자원변동에 영향을 줄 수 있는 해양학적 특성도 함께 고려되어져야 한다. (중략)