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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean society of Fisheries Technology
Journal Basic Information
Journal DOI :
The Korean Society of Fisheries Technology
Editor in Chief :
Volume & Issues
Volume 47, Issue 4 - Nov 2011
Volume 47, Issue 3 - Aug 2011
Volume 47, Issue 2 - May 2011
Volume 47, Issue 1 - Feb 2011
Selecting the target year
Design and performance estimation of fish-luring system using the water cooling typed LED lamp
Bae, Bong-Seong ; An, Heui-Chun ; Kwon, Ki-Jin ; Park, Seong-Wook ; Park, Chang-Doo ; Lee, Kyoung-Hoon ;
Journal of the Korean society of Fisheries Technology , volume 47, issue 2, 2011, Pages 79~87
DOI : 10.3796/KSFT.2011.47.2.079
A fishing lamp is fishing gear to gather fish in the night. But the cost of oil which is used to a light fishing lamp, goes significantly up to almost one hundred million won for 50 tonnage vessels and forty million won in case of vessels less than 10 tonnages. This cost has almost taken 30.40% of total fishing costs. As oil price increases, the business condition of the fishery gets worse and worse. Therefore, it is very urgent to develop an economical fishing lamp, to solve the problem of fishery's business difficulty. This research aims at developing a fishing lamp for squid jigging fishery and hairtail angling fishery using the LED, which has excellent efficiency and durability. One fishing lamp has about 160Watt capacity and five fishing lamps are installed one aluminium panel in which sea water flows to emit generated heat from LED to outside. Developed fishing lamp lights to an effective direction of jigging and angling operation. This fishing lamp can be controlled to light the direction of fish shoal because the aluminium panel can be controlled to up and down direction. The wave length of fishing lamp has white and blue color. White color light is to gather fish shoal of horizontal direction and blue color light is to gather fish shoal of vertical direction. After development of this fishing lamp, 60.110 units are established on the boat, and operated fishing. Consequently, in the case of squid jigging, spent energy was reduced to 39%, in the case of hairtail angling, 68% of spent energy was reduced. And the catch was more than another boat.
Catches of main species and bycatch according to the codend mesh sizes of stow net on anchor in the West Sea of Korea
Cho, Sam-Kwang ; Cha, Bong-Jin ; Kim, Hyun-Young ;
Journal of the Korean society of Fisheries Technology , volume 47, issue 2, 2011, Pages 88~98
DOI : 10.3796/KSFT.2011.47.2.088
Experimental fishing was carried out to compare the catches of main species and bycatch according to the codend mesh size (raschel, 15mm, 25mm, 35mm, 45mm) of stow net on anchor in the coastal waters of Seocheon after manufacturing five kinds of fishing gears and commercial fishing boat (7.93 tons) was used for it. Anchovy (Engraulis japonicus), southern rough shrimp (Trachysalambria curvirostris), beka squid (Loligo beka), cuttle fish (Sepia esculenta), swimming crab (Portunus trituberculatus) were dominant on the five kinds of experimental fishing gears. Southern rough shrimp was caught from all kinds of fishing gears and catches of anchovy was highest in the raschel codend, southern rough shrimp for 15mm, 25mm, 35mm codend and beka squid for 45mm codend. Bycatch proportion against total catches was 623,376g (28.7%) for 2,171,844g in raschel, 11,932g (1.7%) for 704,451g in 15mm, 3,616g (1.6%) for 221,432g in 25mm, 9,276g (4.9%) for 191,052g in 35mm and 2,724g (5.3%) for 51,431g in 45mm.
Long-term variation in catch of Spanish mackerel (Scomberomorus niphonius) related to environmental change in Korean waters
Lee, Seung-Jong ; Kim, Byung-Yeob ; Chang, Dae-Soo ;
Journal of the Korean society of Fisheries Technology , volume 47, issue 2, 2011, Pages 99~107
DOI : 10.3796/KSFT.2011.47.2.099
The relationships among long-term variation in catches of Spanish mackerel (Scomberomorus niphonius) and main food organism such as common mackerel (Scomber japonicus), anchovy (Engraulis japonicus), 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 a warmer regime with higher SST (sea surface temperature). The total catch of Spanish mackerel in Korean waters increased dramatically since the 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 a significant relationship between the Spanish mackerel catch and environmental factor such as SST, common mackerel and anchovy catch in Korean waters.
Variation of fisheries conditions of mackerel (Scomber japonicus) fishing ground for large purse seine fisheries
Lee, Haet-Nim ; Kim, Hyung-Seok ;
Journal of the Korean society of Fisheries Technology , volume 47, issue 2, 2011, Pages 108~117
DOI : 10.3796/KSFT.2011.47.2.108
In order to offer data about fisheries resources management and prediction of catch on large purse seine fisheries, the fluctuation of the fisheries condition and distributions of fishing ground for mackerel were analysed with monthly catch data for 1990.2009. The overall catch has decreased to about 70% since 1997, with approximately 70% of the mackerel (Scomber japonicus) catch and monthly fluctuations showing a similar pattern. Monthly distribution of fishing ground is like distribution of mackerel in large purse seine fishery. The main fishing grounds are near Jeju Island and the Yellow sea with the main fishing season existing between October to December. The catches fluctuations and distribution of fishing ground were related to the effect of regime shifts. Therefore, in order to prediction of catch on large purse seine fisheries should be studied these relationships.
Seasonal variation and species composition of fish species in artificial reefs in the Shinyang-Ri coastal waters off Jeju island, Korea
Kim, Jae-Woo ; Kim, Ha-Won ; Huh, Sung-Hoi ; Kwak, Seok-Nam ;
Journal of the Korean society of Fisheries Technology , volume 47, issue 2, 2011, Pages 118~127
DOI : 10.3796/KSFT.2011.47.2.118
This study was investigated seasonal variation and species composition of fish species at artificial reefs (octangle three-stage compartment type and dice type)and natural rock in the Shinyang-Ri coastal waters off Jeju Island with visual census method in January 2009, April 2009, July 2009, September 2009, December 2009, March 2010, June 2010, and September 2010. A total of 44 fish species was occurred, and the dominant fish species were Apogon semilineatus, Chromis notata, Trachurus japonicus, Sebastes thompsoni and Apogon doederleini. The number of individuals of fishes was higher at April 2009 and March 2010, however, lower at June 2010 and September 2010. The number of fish speices was higher at artificial reefs than those of at natural rock. Apogon semilineatus was dominant at octangle three-stage compartment type and the dice type artificial reefs, whereas Chromis notata was for natural rock. These results indicated that artificial reefs were good habitats for a variety of fish species in the Shinyang-Ri coastal waters off Jeju Island.
Energy budget of sandfish juvenile, Arctoscopus japonicus reared at different diet conditions and water temperature
Yang, Jae-Hyeong ; Lee, Sung-Il ; Yoon, Sang-Chul ; Kim, Jong-Bin ; Chun, Young-Yull ; Park, Kie-Young ;
Journal of the Korean society of Fisheries Technology , volume 47, issue 2, 2011, Pages 128~138
DOI : 10.3796/KSFT.2011.47.2.128
In this study, energy budget was estimated to produce an efficient artificial seed. And it needs to enhance fisheries productivity of sandfish, A. japonicus. In order to estimate energy budget of the sandfish, A. japonicus juvenile fed on nonriched Artemia nauplii (NA) and the enriched Artemia nauplii (EA), of sandfish were reared at constant condition of seawater temperature of natural temperature (NT) and heated temperature (HT). During the reared period, energy used by the reared juveniles were calculated from estimates of data on ingestion, growth, oxygen consumption, nitrogen excretion and energy content. Energy budget of NT-NA, NT-EA, HT-NA and HT-EA were represented as 100C=66.49G+21.28M+0.78F+1.44U, 100C=67.54G+21.40M+9.39F+1.67U, 100C=66.86G+22.66M+8.01F+2.47U and 100C=67.06G+22.96M+7.70F+2.28U. The assimilation efficiency estimated NT-NA, NT-EA, HT-NA and HTEA were represented as 87.78%, 88.94%, 89.52% and 90.02%. Gross growth efficiency estimated NT-NA, NT-EA, HT-NA and HT-EA were represented as 66.49%, 67.54%, 66.86% and 67.06%. Net growth efficiency estimated NT-NA, NT-EA, HT-NA and HT-EA were represented as 75.75%, 75.94%, 74.68% and 74.49%. In this results, two ways could be considered to produce an efficient artificial seed of sandfish. To hasten the growth of sandfish juvenile, heated seawater (HT) and enriched Artemia nauplii (EA) should be inputted to reared condition. And to increase the energy efficiency, natural seawater (NT) and enriched Artemia nauplii (EA) should be inputted to reared condition.
Hydro-acoustic survey on fish distribution and aggregated fish at artificial reefs in marine ranching area
Kim, Hyun-Young ; Hwang, Bo-Kyu ; Lee, Yoo-Won ; Shin, Hyeon-Ok ; Kwon, Jung-No ; Lee, Kyung-Hoon ;
Journal of the Korean society of Fisheries Technology , volume 47, issue 2, 2011, Pages 139~145
DOI : 10.3796/KSFT.2011.47.2.139
Hydro-acoustic survey was carried out to estimate a fish distribution at marine ranching area and aggregated fish schools at artificial reef area in Oeyeondo, Korea. The survey system was set up with DGPS system, scientific echo sounder (EK60, Simrad Co.), and ECDIS (Mecys. Co. LTD). A track survey and a random survey was respectively applied to the marine ranching area (474.4ha) and to the artificial reef area (within a radius of 300m). As the result, fish distribution and MVBS values in marine ranching area showed that created fisheries resources didn't come to be abundant yet as to appear fish distribution in all of the area. In the artificial reef area, it was, however, able to detect many fish school signals on the top of and around artificial reefs and to confirm the luring effect of artificial reefs.
Performance characteristics of a multi-directional underwater CCTV camera system to use in the artificial reef survey
Lee, Dae-Jae ;
Journal of the Korean society of Fisheries Technology , volume 47, issue 2, 2011, Pages 146~152
DOI : 10.3796/KSFT.2011.47.2.146
Underwater CCTV camera systems are increasingly replaced the traditional net approach of assessing the species, numbers and aggregation patterns of marine animals distributing around the artificial reefs installed in the inshore fishing grounds, in particular, in relation to the biological investigation of behavior and distribution patterns of target fishes. In relation to these needs, we developed a multi-directional underwater CCTV camera system to use in detecting and tracking marine animals in the artificial reef ground. The marine targets to be investigated were independently tracked by using a camera module toward the bottom and four camera modules installed in the interval of
in horizontal plane and inclination of
in vertical plane of the CCTV system without the overlap of video frames by each camera module. From the results of several field tests at sea, we believe that the developed multi-directional underwater CCTV camera system will contribute to a better understanding in evaluating the effect of artificial reefs installed in the inshore fishing grounds.
Enhancing social awareness of biodegradable fishing gears through technology marketing
Park, Seong-Wook ; Kwon, Hyeok-Jun ; Park, Seong-Kwae ;
Journal of the Korean society of Fisheries Technology , volume 47, issue 2, 2011, Pages 153~163
DOI : 10.3796/KSFT.2011.47.2.153
The main purpose of this study is to understand the marketing approaches and strategies that are used to disseminating biodegradable fishing gears and distinguish the cognition and the non-cognition group's attitudes on the product. We used a technology acceptance model for analyzing product attributes and its impacts on fishers' purchase. The result of this research shows that 'perceived usefulness and easiness of use' have positive effect on 'purchase intention,' and then give impacts on 'purchase intention' for the entire respondents. For the cognitive respondents these factors have influence on 'attitude' but they do not affect 'purchase decision.' However, 'perceived usefulness and easiness of use' have much positive impact on 'purchase intention.' In the non-cognition group, the 'perceived intention' and 'company and country of manufacturers' have direct positive effect on 'purchase intention' through 'attitude' and also 'on 'purchase intention.' This research provides some meaningful policy implications on further development and technology marketing of biodegradable fishing gears.