Pub Date : 2012-02-28DOI: 10.3796/KSFT.2012.48.1.091
Yoo-Won， Lee, Wook-Sung Kim
This study is aimed to utilize a basic data for setting up an allowable air noise with IMO standard in accommodation and working areas of 24m longer fishing vessels. The air noise in accommodation and working areas of 300 tons class squid-jigger were evaluated and the levels were compared to the allowable levels of IMO. The results indicated that the maximum range of noise levels was estimated to be between 54.8dB (A) and 83.2dB, and the correlation between the distance from the main engine to measuring point and the maximum noise level of each point was shown to be y
{"title":"Noise characteristics in a jigging fishing vessel of 300 tons class","authors":"Yoo-Won， Lee, Wook-Sung Kim","doi":"10.3796/KSFT.2012.48.1.091","DOIUrl":"https://doi.org/10.3796/KSFT.2012.48.1.091","url":null,"abstract":"This study is aimed to utilize a basic data for setting up an allowable air noise with IMO standard in accommodation and working areas of 24m longer fishing vessels. The air noise in accommodation and working areas of 300 tons class squid-jigger were evaluated and the levels were compared to the allowable levels of IMO. The results indicated that the maximum range of noise levels was estimated to be between 54.8dB (A) and 83.2dB, and the correlation between the distance from the main engine to measuring point and the maximum noise level of each point was shown to be y","PeriodicalId":211073,"journal":{"name":"Bulletin of The Korean Society of Fisheries Technology","volume":"162 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133692146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-11-30DOI: 10.3796/KSFT.2011.47.4.316
H. Chang
In this study, the entrapped number is investigated on the UV light with different illuminance to fluorescent bait cage for swimming crab in order to find the appropriate illuminance which has the best attraction effect of fluorescent bait cage for pots. In addition, preference to the light, arrival time and residence time at light area are compared and analyzed to fluorescent bait cage and non-fluorescent bait cage for American lobster at the UV light and ordinary light according to the illuminance condition. Pot with red non-fluorescent bait cage at the no lighting (0.05). The arrival time to UV light area of lobster is shown as 1.2-2.4 times faster than that to ordinary light area. Generally, it is shown that arrival time to UV light area is faster than the arrival time to ordinary light area when the illuminance of ordinary light is the same as or lower than that of UV light (P0.05). The residence time at UV light area of lobster is 1.2-1.7 times longer than that at ordinary light area. The residence time depending on different illuminance of ordinary light and genders showed no significant difference (P>0.05).
{"title":"Study on the UV illuminance to improve on attraction effect of fluorescent bait cage for pots","authors":"H. Chang","doi":"10.3796/KSFT.2011.47.4.316","DOIUrl":"https://doi.org/10.3796/KSFT.2011.47.4.316","url":null,"abstract":"In this study, the entrapped number is investigated on the UV light with different illuminance to fluorescent bait cage for swimming crab in order to find the appropriate illuminance which has the best attraction effect of fluorescent bait cage for pots. In addition, preference to the light, arrival time and residence time at light area are compared and analyzed to fluorescent bait cage and non-fluorescent bait cage for American lobster at the UV light and ordinary light according to the illuminance condition. Pot with red non-fluorescent bait cage at the no lighting (0.05). The arrival time to UV light area of lobster is shown as 1.2-2.4 times faster than that to ordinary light area. Generally, it is shown that arrival time to UV light area is faster than the arrival time to ordinary light area when the illuminance of ordinary light is the same as or lower than that of UV light (P0.05). The residence time at UV light area of lobster is 1.2-1.7 times longer than that at ordinary light area. The residence time depending on different illuminance of ordinary light and genders showed no significant difference (P>0.05).","PeriodicalId":211073,"journal":{"name":"Bulletin of The Korean Society of Fisheries Technology","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127760358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-11-30DOI: 10.3796/KSFT.2011.47.4.403
H. Jo, H. Hwang, D. Kwon, Gyeong-Suk Jeong, K. Choi, Byung-Yeul Cha, Yang-Jae Im
Catches, CPUE, fishing season, disc width composition and fishing ground were studied to rebuild skate ray, Raja pulchra resource by the offshore longline fishery in Heuksan-do, Korea. Annual catches and CPUE of skate ray were increased from 2003 to 2010 (CPUE: from 2007 to 2010) continuously. The main fishing season of the skate ray was from December to next May. Disc width at 50% maturity for Raja pulchra by sex were estimated to be 65.83cm, 57.01cm by female and male respectively. The range of disc width was 22.3-112.0cm and the average disc width was 66.9cm, 60.0cm by female and male of Raja pulchra respectively during 2007-2010. Annual average of disc width of female skate ray was decreased from 2007 to 2010. The fishing grounds were formed from the coastal water off Hong-do to the coastal water off Gyeogyeolbiyeol-do, Korea. The center of fishing ground in October was formed in the northwestern coastal water off Gyeogyeolbiyeol-do and separated from that of the other months.
{"title":"Fishing characters of skate ray, Raja pulchra by the offshore longline fishery in Heuksan-do, Korea","authors":"H. Jo, H. Hwang, D. Kwon, Gyeong-Suk Jeong, K. Choi, Byung-Yeul Cha, Yang-Jae Im","doi":"10.3796/KSFT.2011.47.4.403","DOIUrl":"https://doi.org/10.3796/KSFT.2011.47.4.403","url":null,"abstract":"Catches, CPUE, fishing season, disc width composition and fishing ground were studied to rebuild skate ray, Raja pulchra resource by the offshore longline fishery in Heuksan-do, Korea. Annual catches and CPUE of skate ray were increased from 2003 to 2010 (CPUE: from 2007 to 2010) continuously. The main fishing season of the skate ray was from December to next May. Disc width at 50% maturity for Raja pulchra by sex were estimated to be 65.83cm, 57.01cm by female and male respectively. The range of disc width was 22.3-112.0cm and the average disc width was 66.9cm, 60.0cm by female and male of Raja pulchra respectively during 2007-2010. Annual average of disc width of female skate ray was decreased from 2007 to 2010. The fishing grounds were formed from the coastal water off Hong-do to the coastal water off Gyeogyeolbiyeol-do, Korea. The center of fishing ground in October was formed in the northwestern coastal water off Gyeogyeolbiyeol-do and separated from that of the other months.","PeriodicalId":211073,"journal":{"name":"Bulletin of The Korean Society of Fisheries Technology","volume":"13 44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114471718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-11-30DOI: 10.3796/KSFT.2011.47.4.356
Heeyong Kim, Mun-Seong Choi, Young-il Seo, Sun-Kil Lee, H. Cha
Species composition of fishes and the recruitment properties of jack mackerel , Trachurus japonicus , in the waters around the Geumo Islands in the mid -South Sea were investigated by using both sides fyke nets every month from February to December 2010. During study period , a total of 30,503 fishes (1,380.4 kg ) were collected and classified into 2 classes , 16 orders , 61 families and 121 species . The dominant species was jack mackerel occupying 80.5% of total individuals and 44.4% of total biomass . The fork length range of jack mackerel was 5.5 －26.8 cm and individuals about 6 cm was appeared only in the middle and southern area of the Geumo Islands in May . The new recruitment of jack mackerel appeared from May in the waters around the Geumo Islands is probably caused by the warm water intrusion associated with the development of stratification due to the extinction of seasonal coastal cold waters by the increase of solar radiation heat . Furthermore , the jack mackerels less than 6 cm recruiting in the mid -South Sea in spring were considered as mixed ones by individuals spawned in the East China Sea and in the waters around the Jeju Island considering the collected time , migration period and spawning time of them .
2010年2月至12月，采用双侧网对南海中部金云群岛海域青花鲭鱼的鱼种组成和捕集特性进行了调查。研究期间共捕获鱼类30503条(13800.4 kg)，隶属于2纲16目61科121种。优势种为青花鱼，占总个体数的80.5%，总生物量的44.4%。青花鱼的叉长范围为5.5 ~ 26.8 cm, 5月份仅在金茂群岛中南部出现了6 cm左右的个体。从5月份开始，在金茂群岛附近海域出现了新的长尾鲭鱼，这可能是由于太阳辐射热增加，季节性沿海冷水消失，导致分层发展，导致暖水入侵所致。此外，考虑到采鱼时间、洄游期和产卵时间等因素，在东海和济州岛附近海域产卵的个体认为春季在南海中部洄游的小于6厘米的青花鱼是混合青花鱼。
{"title":"Recruitment characteristics of jack mackerel , Trachurus japonicus , in the waters around the Geumo Islands by using both sides fyke nets","authors":"Heeyong Kim, Mun-Seong Choi, Young-il Seo, Sun-Kil Lee, H. Cha","doi":"10.3796/KSFT.2011.47.4.356","DOIUrl":"https://doi.org/10.3796/KSFT.2011.47.4.356","url":null,"abstract":"Species composition of fishes and the recruitment properties of jack mackerel , Trachurus japonicus , in the waters around the Geumo Islands in the mid -South Sea were investigated by using both sides fyke nets every month from February to December 2010. During study period , a total of 30,503 fishes (1,380.4 kg ) were collected and classified into 2 classes , 16 orders , 61 families and 121 species . The dominant species was jack mackerel occupying 80.5% of total individuals and 44.4% of total biomass . The fork length range of jack mackerel was 5.5 －26.8 cm and individuals about 6 cm was appeared only in the middle and southern area of the Geumo Islands in May . The new recruitment of jack mackerel appeared from May in the waters around the Geumo Islands is probably caused by the warm water intrusion associated with the development of stratification due to the extinction of seasonal coastal cold waters by the increase of solar radiation heat . Furthermore , the jack mackerels less than 6 cm recruiting in the mid -South Sea in spring were considered as mixed ones by individuals spawned in the East China Sea and in the waters around the Jeju Island considering the collected time , migration period and spawning time of them .","PeriodicalId":211073,"journal":{"name":"Bulletin of The Korean Society of Fisheries Technology","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122926172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-11-30DOI: 10.3796/KSFT.2011.47.4.428
Seok-Jae Kim, Moon-Gap Park, Yoo-Won， Lee
To establish a vessel safety management system for improving the safety of vessel`s traffic and preventing vessel`s traffic accidents, the state of marine traffic in the Busan South Port was investigated and analyzed as preliminary survey of the countermeasures. As a result of the study, there are 1,158 vessels in a day, 48 vessels in an hour, and the maximum traffic is about 118 vessels between 16:00 and 17:00 hours everyday, which requires to establish and operate a traffic control system necessarily for ensuring vessel`s traffic safety. Furthermore, passages of tanker, passenger ship, cargo vessel and government vessel showed to sail along main traffic lane to be obtained enough sea depth at the survey area. However, passages of fishing vessel and launch showed to sail freely at all survey area owing to outstanding maneuverability and a shallow draft. Some vessels of launch sailed along main traffic lane, but other vessels crossed to sail it. The passages to cross main traffic lane is higher the risk of collision. Therefore, safety measures are urgently needed for the operation of the Busan South Port management system and the prevention of marine pollution.
{"title":"Marine traffic survey to improve safety of vessel traffic at Busan South Port","authors":"Seok-Jae Kim, Moon-Gap Park, Yoo-Won， Lee","doi":"10.3796/KSFT.2011.47.4.428","DOIUrl":"https://doi.org/10.3796/KSFT.2011.47.4.428","url":null,"abstract":"To establish a vessel safety management system for improving the safety of vessel`s traffic and preventing vessel`s traffic accidents, the state of marine traffic in the Busan South Port was investigated and analyzed as preliminary survey of the countermeasures. As a result of the study, there are 1,158 vessels in a day, 48 vessels in an hour, and the maximum traffic is about 118 vessels between 16:00 and 17:00 hours everyday, which requires to establish and operate a traffic control system necessarily for ensuring vessel`s traffic safety. Furthermore, passages of tanker, passenger ship, cargo vessel and government vessel showed to sail along main traffic lane to be obtained enough sea depth at the survey area. However, passages of fishing vessel and launch showed to sail freely at all survey area owing to outstanding maneuverability and a shallow draft. Some vessels of launch sailed along main traffic lane, but other vessels crossed to sail it. The passages to cross main traffic lane is higher the risk of collision. Therefore, safety measures are urgently needed for the operation of the Busan South Port management system and the prevention of marine pollution.","PeriodicalId":211073,"journal":{"name":"Bulletin of The Korean Society of Fisheries Technology","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129667059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-11-30DOI: 10.3796/KSFT.2011.47.4.338
Sun-Do Hwang, Yang-Jae Im
To obtain the effective sampling estuarine fauna by a passive net in the West Sea of Korea occurring strong tide , catch were collected by bag nets with various sampling trials off Ganghwa Island in November 2009. We compared the difference of community structures (on spring tide vs . neap tide , total sample vs . sub- sample and 4 nets vs . 1 net ) with each species composition as a sampling unit by the Pearson chi-square test . Number of individual at the spring tide was more abundant than that at the neap tide (p<0.0001) although number of species at the spring tide was not significantly different with that at the neap tide (p〓0.174). Both number of species (p〓0.138) and number of individual (p〓0.096) were not significantly different between total sample and random subsample . Number of species was not significantly different between the subsample by 1 net and the subsample by 4 nets (p〓0.515), but number of individual was a little different on both samples (p〓0.024). In conclusion , we suggest the subsample by 1 net at spring tide as the effective sampling estuarine fauna by a passive net in the West Sea occurring strong tide .
{"title":"Effective sampling of estuarine fauna by a passive net in theWest Sea of Korea occurring strong tide","authors":"Sun-Do Hwang, Yang-Jae Im","doi":"10.3796/KSFT.2011.47.4.338","DOIUrl":"https://doi.org/10.3796/KSFT.2011.47.4.338","url":null,"abstract":"To obtain the effective sampling estuarine fauna by a passive net in the West Sea of Korea occurring strong tide , catch were collected by bag nets with various sampling trials off Ganghwa Island in November 2009. We compared the difference of community structures (on spring tide vs . neap tide , total sample vs . sub- sample and 4 nets vs . 1 net ) with each species composition as a sampling unit by the Pearson chi-square test . Number of individual at the spring tide was more abundant than that at the neap tide (p<0.0001) although number of species at the spring tide was not significantly different with that at the neap tide (p〓0.174). Both number of species (p〓0.138) and number of individual (p〓0.096) were not significantly different between total sample and random subsample . Number of species was not significantly different between the subsample by 1 net and the subsample by 4 nets (p〓0.515), but number of individual was a little different on both samples (p〓0.024). In conclusion , we suggest the subsample by 1 net at spring tide as the effective sampling estuarine fauna by a passive net in the West Sea occurring strong tide .","PeriodicalId":211073,"journal":{"name":"Bulletin of The Korean Society of Fisheries Technology","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127244388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-11-30DOI: 10.3796/KSFT.2011.47.4.419
Bokyu Hwang, H. Shin
Simulation technique for the fish behavior was applied to estimate fish school movement in the cage net. Individual-based fish behavior model (Huth and Wessel, 1991) was evaluated in a free area to understand the characteristics for the model, and the movement in the cage net was simulated by defining the fish reaction against the displacement of cage net. As a result, the distance to the net was not considerably changed and the space among fishes in cage net was slightly decreased by reducing the net space. Swimming area was, however, significantly affected by changing the net space and the relationship between swimming area and net displacement was theoretically estimated as y
应用鱼类行为模拟技术对网箱网箱中鱼群运动进行了估计。在自由区域对基于个体的鱼类行为模型(Huth and Wessel, 1991)进行评估，了解模型的特性，并通过定义鱼类对网箱位移的反应来模拟网箱中的运动。结果表明，笼网与网眼之间的距离变化不大，减小网眼间距反而使笼网内的鱼间空间略有减小。而游泳面积受净空间变化的影响显著，理论上估计游泳面积与净位移的关系为y
{"title":"Simulation of fish reaction against cage net with an individual fish behaviour model","authors":"Bokyu Hwang, H. Shin","doi":"10.3796/KSFT.2011.47.4.419","DOIUrl":"https://doi.org/10.3796/KSFT.2011.47.4.419","url":null,"abstract":"Simulation technique for the fish behavior was applied to estimate fish school movement in the cage net. Individual-based fish behavior model (Huth and Wessel, 1991) was evaluated in a free area to understand the characteristics for the model, and the movement in the cage net was simulated by defining the fish reaction against the displacement of cage net. As a result, the distance to the net was not considerably changed and the space among fishes in cage net was slightly decreased by reducing the net space. Swimming area was, however, significantly affected by changing the net space and the relationship between swimming area and net displacement was theoretically estimated as y","PeriodicalId":211073,"journal":{"name":"Bulletin of The Korean Society of Fisheries Technology","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124750507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-11-30DOI: 10.3796/KSFT.2011.47.4.327
Bong-Seong Bae, Samkwang Cho, Bongjin Cha, Seong-wook Park, Heui–Chun An
This study was conducted to develop energy-efficient LED lamps with an excellent fishing performance for an anchovy scoop net by comparing the functions of 6 different lamps- incandescent, blue LED, green LED, white LED, yellow LED and red LED lamp. We used incandescent and red LED lamps only for the initial test and then excluded because those showed the lowest herding capacity. According to the result, yellow LED showed lower herding capacity in comparison with the blue, green and white one. Although the herding performance of the blue, green and white LED was similar in almost tests, herding speed to the each light was different. The anchovies were gathered into the blue LED as the speed of 39.88cm/s that was the fastest. Green LED was the second as the speed of 33.28cm/s. White LED was the slowest as the speed of 26.73cm/s. We will have field tests because we found the result that yellow LED`s herding performance was better than green LED`s for 5 seconds comparing after starting in some tests.
{"title":"The study on the Anchovy`s (Engraulis japonica) reaction to several light colors in a tank","authors":"Bong-Seong Bae, Samkwang Cho, Bongjin Cha, Seong-wook Park, Heui–Chun An","doi":"10.3796/KSFT.2011.47.4.327","DOIUrl":"https://doi.org/10.3796/KSFT.2011.47.4.327","url":null,"abstract":"This study was conducted to develop energy-efficient LED lamps with an excellent fishing performance for an anchovy scoop net by comparing the functions of 6 different lamps- incandescent, blue LED, green LED, white LED, yellow LED and red LED lamp. We used incandescent and red LED lamps only for the initial test and then excluded because those showed the lowest herding capacity. According to the result, yellow LED showed lower herding capacity in comparison with the blue, green and white one. Although the herding performance of the blue, green and white LED was similar in almost tests, herding speed to the each light was different. The anchovies were gathered into the blue LED as the speed of 39.88cm/s that was the fastest. Green LED was the second as the speed of 33.28cm/s. White LED was the slowest as the speed of 26.73cm/s. We will have field tests because we found the result that yellow LED`s herding performance was better than green LED`s for 5 seconds comparing after starting in some tests.","PeriodicalId":211073,"journal":{"name":"Bulletin of The Korean Society of Fisheries Technology","volume":"2016 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127513499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-11-30DOI: 10.3796/KSFT.2011.47.4.411
Kyounghoon Lee
As a fish way is a structure for fish migrating well toward upper stream due to breaking river flow by a dam or dammed pool, the specific fish`s swimming ability is one of the main factors in making a plan and managing it. In addition, it also needs to understand the current field in fish road to evaluate its performance. This study is aimed to analyze the swimming patterns with current velocity changes using a Particle Imaging Velocimetry (PIV) in order to understand the swimming ability of silver fish (Plecoglossus altivelis) that is one of the fishes migrating through the fish way of Nakdong River, and to analyze the 2 dimensional current field near to silver fish at swimming momentum. The results showed that average values of tail beat frequencies for continuous swimming with current velocity were 2.8 Hz at 0.3 m/s, 3.2 Hz at 0.4 m/s, 3.8 Hz at 0.5 m/s, respectively. The wake would be produced by direction turning of fish`s tail fin and its magnitude would be verified by the difference of pressure. The pressure turbulent flow produced by its tail beat would be made in both sides, and then, the magnitude of wake should be the source of moving direction. The swimming momentum will help to support the primary factor in making a suitable design for specific fish species migrating toward the district river.
{"title":"Measurement of swimming ability of silver fish (Plecoglossus altivelis ) using a Particle Imaging Velocimetry","authors":"Kyounghoon Lee","doi":"10.3796/KSFT.2011.47.4.411","DOIUrl":"https://doi.org/10.3796/KSFT.2011.47.4.411","url":null,"abstract":"As a fish way is a structure for fish migrating well toward upper stream due to breaking river flow by a dam or dammed pool, the specific fish`s swimming ability is one of the main factors in making a plan and managing it. In addition, it also needs to understand the current field in fish road to evaluate its performance. This study is aimed to analyze the swimming patterns with current velocity changes using a Particle Imaging Velocimetry (PIV) in order to understand the swimming ability of silver fish (Plecoglossus altivelis) that is one of the fishes migrating through the fish way of Nakdong River, and to analyze the 2 dimensional current field near to silver fish at swimming momentum. The results showed that average values of tail beat frequencies for continuous swimming with current velocity were 2.8 Hz at 0.3 m/s, 3.2 Hz at 0.4 m/s, 3.8 Hz at 0.5 m/s, respectively. The wake would be produced by direction turning of fish`s tail fin and its magnitude would be verified by the difference of pressure. The pressure turbulent flow produced by its tail beat would be made in both sides, and then, the magnitude of wake should be the source of moving direction. The swimming momentum will help to support the primary factor in making a suitable design for specific fish species migrating toward the district river.","PeriodicalId":211073,"journal":{"name":"Bulletin of The Korean Society of Fisheries Technology","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116976122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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