Pub Date : 2011-11-30DOI: 10.3796/KSFT.2011.47.4.344
D. An, Youjung Kwon, K. Bigelow, D. Moon, Sung Il Lee
We conducted experiments to compare the catch rate of bigeye tuna and yellowfin tuna between circle hooks and straight shank hook in the Korean tuna longline fishery at the eastern and central Pacific Ocean from 2005 to 2007. We analyzed difference of fork length, survival and hooking location between a circle hook and a straight shank hook for both tunas, respectively. There was no difference in the mean fork length size of yellowfin tuna caught on the two type of hook but bigeye tuna was significant. In case of survival, there was no difference between two hook type, but the difference of hooking location was significant for both species. We also analyzed to find determinants of both tunas catch rate using generalized linear models (GLMs) which were used latitude, longitude, year, month, depth, hook type, bait type and so on as independent variables. Spatial factors, latitude and longitude, and temporal factors, year and month, affected catch rate of bigeye tuna and yellowfin tuna. And also, depth such as a marine environment factor was influenced on catch rate.
{"title":"Determination factors for catch rate of the target species between circle hook and straight shank hook in the Korean tuna longline fishery","authors":"D. An, Youjung Kwon, K. Bigelow, D. Moon, Sung Il Lee","doi":"10.3796/KSFT.2011.47.4.344","DOIUrl":"https://doi.org/10.3796/KSFT.2011.47.4.344","url":null,"abstract":"We conducted experiments to compare the catch rate of bigeye tuna and yellowfin tuna between circle hooks and straight shank hook in the Korean tuna longline fishery at the eastern and central Pacific Ocean from 2005 to 2007. We analyzed difference of fork length, survival and hooking location between a circle hook and a straight shank hook for both tunas, respectively. There was no difference in the mean fork length size of yellowfin tuna caught on the two type of hook but bigeye tuna was significant. In case of survival, there was no difference between two hook type, but the difference of hooking location was significant for both species. We also analyzed to find determinants of both tunas catch rate using generalized linear models (GLMs) which were used latitude, longitude, year, month, depth, hook type, bait type and so on as independent variables. Spatial factors, latitude and longitude, and temporal factors, year and month, affected catch rate of bigeye tuna and yellowfin tuna. And also, depth such as a marine environment factor was influenced on catch rate.","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":"114355280","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.2011.47.4.300
Hae-Hoon Park, Bong-Seong Bae
The investigation for the catch and species composition in the deep sea of the East Sea was done to search marine organisms using some kinds of traps with small commercial fishing vessel near Goseong, Korea from 2008 to 2009. The experiments was carried out with some different traps at the depth of 200m, 400m, 700m and 1,000m. In 2008, the amount of catch with rectangular, cone and drum net traps was 91.4kg with twelve trips and the proportion of catch with rectangular and cone traps was high. Dominant species caught were Aniwan whelk (57%), snow crab (12%), hunchback sculpin (7%) and red snow crab (5%). The catch of Aniwan whelk was done well with rectangular and cone traps at the depth of 700-1,000m. Snow crab was mainly caught with rectangular and cone traps at the shallower depth of 200m, while red snow crab caught a lot with cone trap at the deeper depth of 700m. In 2009, the amount of catch with rectangular, cone and round traps was 92.4kg with nine trips. The proportion of catch with round trap was higher than that with cone trap. Dominant species caught were snow crab (67.1%), Aniwan whelk (14.8%) and northern shrimp (9.8%). Snow crab was caught well with round trap at the depth less than 400m.
{"title":"Catch and species composition with some different traps by depth in the deep-water of the East Sea","authors":"Hae-Hoon Park, Bong-Seong Bae","doi":"10.3796/KSFT.2011.47.4.300","DOIUrl":"https://doi.org/10.3796/KSFT.2011.47.4.300","url":null,"abstract":"The investigation for the catch and species composition in the deep sea of the East Sea was done to search marine organisms using some kinds of traps with small commercial fishing vessel near Goseong, Korea from 2008 to 2009. The experiments was carried out with some different traps at the depth of 200m, 400m, 700m and 1,000m. In 2008, the amount of catch with rectangular, cone and drum net traps was 91.4kg with twelve trips and the proportion of catch with rectangular and cone traps was high. Dominant species caught were Aniwan whelk (57%), snow crab (12%), hunchback sculpin (7%) and red snow crab (5%). The catch of Aniwan whelk was done well with rectangular and cone traps at the depth of 700-1,000m. Snow crab was mainly caught with rectangular and cone traps at the shallower depth of 200m, while red snow crab caught a lot with cone trap at the deeper depth of 700m. In 2009, the amount of catch with rectangular, cone and round traps was 92.4kg with nine trips. The proportion of catch with round trap was higher than that with cone trap. Dominant species caught were snow crab (67.1%), Aniwan whelk (14.8%) and northern shrimp (9.8%). Snow crab was caught well with round trap at the depth less than 400m.","PeriodicalId":211073,"journal":{"name":"Bulletin of The Korean Society of Fisheries Technology","volume":"98 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":"133696001","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.2011.47.4.369
Young-il Seo, C. Zhang, Jae Bong Lee, H. Cha
Changes in ecosystem risks were evaluated using the ecosystem-based fisheries assessment (EBFA) approach of Zhang et al. (2009, 2010) and the comprehensive ecosystem-based fisheries management (EBFM) plan was made for the southern sea of Korea in this study. The risk assessment of the southern sea ecosystem was conducted by establishing ecosystem management objectives and by estimating risk scores (RS) for indicators. To conduct this analysis a number of indicators and their reference points for assessing these risk scores were developed in this study. The number of indicators in the risk analysis was 28 for the quantitative tier 1 analysis and 30 for the qualitative tier 2 analysis. The objective risk index (ORI), species risk index (SRI) and fisheries risk index (FRI) were calculated from the risk scores. Comparing the past (1988) and the current (2008) status of fisheries resources, management implications were discussed. The fishery risk index (FRI) of large purse seine fishery in the southern sea of Korea decreased substantially from 0.972 in 1988 to 0.883 in 2008, and improvement in the management of fisheries operated in the southern sea of Korea.
{"title":"Stock assessment by ecosystem risk analysis of large purse seine fishery in the southern sea of Korea","authors":"Young-il Seo, C. Zhang, Jae Bong Lee, H. Cha","doi":"10.3796/KSFT.2011.47.4.369","DOIUrl":"https://doi.org/10.3796/KSFT.2011.47.4.369","url":null,"abstract":"Changes in ecosystem risks were evaluated using the ecosystem-based fisheries assessment (EBFA) approach of Zhang et al. (2009, 2010) and the comprehensive ecosystem-based fisheries management (EBFM) plan was made for the southern sea of Korea in this study. The risk assessment of the southern sea ecosystem was conducted by establishing ecosystem management objectives and by estimating risk scores (RS) for indicators. To conduct this analysis a number of indicators and their reference points for assessing these risk scores were developed in this study. The number of indicators in the risk analysis was 28 for the quantitative tier 1 analysis and 30 for the qualitative tier 2 analysis. The objective risk index (ORI), species risk index (SRI) and fisheries risk index (FRI) were calculated from the risk scores. Comparing the past (1988) and the current (2008) status of fisheries resources, management implications were discussed. The fishery risk index (FRI) of large purse seine fishery in the southern sea of Korea decreased substantially from 0.972 in 1988 to 0.883 in 2008, and improvement in the management of fisheries operated in the southern sea of Korea.","PeriodicalId":211073,"journal":{"name":"Bulletin of The Korean Society of Fisheries Technology","volume":"18 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":"114577672","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.2011.47.4.435
Jin-Keun Hong, Il–Kwon Kang, Seong-Jae Jeong
In an attempt to respond to the increase in international oil prices and reduce operating expenses, ship remodeling was carried out on a 740ton class tuna purse seiner. To strengthen the competitiveness of the fisheries industry by improving vessel performance, a bulbous bow was newly equipped. The slipway and rudder area were also lengthened and enlarged with the propeller and main engine remained unchanged. To reduce the hull resistance, a circle type bulbous bow was attached on the hull behind bow thruster and thus the cost for exchanging electrical equipment for bow thruster was reduced. The new rudder area was expanded 15% more than the old one within the extent that the existing mechanical control part and rudder stock were not changed. To prevent fishing net damage and stabilize wake field, slipway was lengthened to the optimal position. All of the new design of remodeling parts went through the model tests in towing tank and CWC. Besides resistance test, all of necessary model test results were delivered for hydrodynamic character for the modified ship. The maneuvering simulation to verify that the remodeled ship satisfies the IMO rules was performed in both zigzag and turning tests. The estimated resistance with new bulbous bow and lengthened stern was reduced by 4.8% in the 2-dimensional analysis and 17.4% in the 3-dimensional analysis in comparison of conventional ship. The average reduction of resistance was estimated about 10%. Maneuvering character of modified hull form was found to satisfy all regulations under IMO. The remodeling of tuna purse seiner can not only improve fishing performance but also contribute to reduction of operating cost by saving energy for the fisheries industry.
{"title":"Remodeling of tuna purse seiner for improving fishing performance","authors":"Jin-Keun Hong, Il–Kwon Kang, Seong-Jae Jeong","doi":"10.3796/KSFT.2011.47.4.435","DOIUrl":"https://doi.org/10.3796/KSFT.2011.47.4.435","url":null,"abstract":"In an attempt to respond to the increase in international oil prices and reduce operating expenses, ship remodeling was carried out on a 740ton class tuna purse seiner. To strengthen the competitiveness of the fisheries industry by improving vessel performance, a bulbous bow was newly equipped. The slipway and rudder area were also lengthened and enlarged with the propeller and main engine remained unchanged. To reduce the hull resistance, a circle type bulbous bow was attached on the hull behind bow thruster and thus the cost for exchanging electrical equipment for bow thruster was reduced. The new rudder area was expanded 15% more than the old one within the extent that the existing mechanical control part and rudder stock were not changed. To prevent fishing net damage and stabilize wake field, slipway was lengthened to the optimal position. All of the new design of remodeling parts went through the model tests in towing tank and CWC. Besides resistance test, all of necessary model test results were delivered for hydrodynamic character for the modified ship. The maneuvering simulation to verify that the remodeled ship satisfies the IMO rules was performed in both zigzag and turning tests. The estimated resistance with new bulbous bow and lengthened stern was reduced by 4.8% in the 2-dimensional analysis and 17.4% in the 3-dimensional analysis in comparison of conventional ship. The average reduction of resistance was estimated about 10%. Maneuvering character of modified hull form was found to satisfy all regulations under IMO. The remodeling of tuna purse seiner can not only improve fishing performance but also contribute to reduction of operating cost by saving energy for the fisheries industry.","PeriodicalId":211073,"journal":{"name":"Bulletin of The Korean Society of Fisheries Technology","volume":"03 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":"129997551","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 : 2011-08-31DOI: 10.3796/KSFT.2011.47.3.183
Young-il An, Hakgeun Jeong
This study made a comparative analysis of behavioral reaction of squid to red (624 nm ), green (524 nm ), blue (460 nm ) & white LED light , its arrival time for the shadow section by making the shadow section in the central section of a water tank just like the bottom part of a squid jigging vessel , and on-site catching efficiency of LED fishing lamp with control fishing vessel . The color LED light showing the highest squidgathering rate as against the shadow section was found to be blue LED light with 39.3% rate under the dark (0.05 lx ) condition . Under the brighter condition than 0.05 lx , white LED light was found to have the highest gathering rate of 41.5%. In addition , it was found that squid gathering rate was high at the shadow section which showed 6.3- fold brightness difference between the shadow section and bright section . As for the arrival time for the shadow section , blue LED light was found to be the fastest in attracting squids in 192.7 seconds under the dark condition while the red LED light was the fastest in luring squids in 164.6 seconds under the bright condition . The ratio of the squid-jigging operation and sailing in fuel consumption of the fishing vessel loaded with LED fishing lamp is about 7 to 1, showing most of the fuel is consumed more in sailing than in squid-jigging operation . As for a catch of squid , the control vessel loaded with MH (Metal Halide ) fishing lamp had more catch of 600- 7,080 squids than the vessel loaded with LED fishing lamp having a catch of 260- 1,700 squids . In addition , even in the comparison of a catch per automatic jigging machine , the catch of the vessel loaded with MH fishing lamp excelled that of the vessel loaded with LED fishing lamp in 6 operations of squid jigging out of 9 operations . The ratio of hand-jigging and automatic jigging machine (one
{"title":"Catching efficiency of LED fishing lamp and behavioral reaction of common squid Todarodes pacificus to the shadow section of color LED light","authors":"Young-il An, Hakgeun Jeong","doi":"10.3796/KSFT.2011.47.3.183","DOIUrl":"https://doi.org/10.3796/KSFT.2011.47.3.183","url":null,"abstract":"This study made a comparative analysis of behavioral reaction of squid to red (624 nm ), green (524 nm ), blue (460 nm ) & white LED light , its arrival time for the shadow section by making the shadow section in the central section of a water tank just like the bottom part of a squid jigging vessel , and on-site catching efficiency of LED fishing lamp with control fishing vessel . The color LED light showing the highest squidgathering rate as against the shadow section was found to be blue LED light with 39.3% rate under the dark (0.05 lx ) condition . Under the brighter condition than 0.05 lx , white LED light was found to have the highest gathering rate of 41.5%. In addition , it was found that squid gathering rate was high at the shadow section which showed 6.3- fold brightness difference between the shadow section and bright section . As for the arrival time for the shadow section , blue LED light was found to be the fastest in attracting squids in 192.7 seconds under the dark condition while the red LED light was the fastest in luring squids in 164.6 seconds under the bright condition . The ratio of the squid-jigging operation and sailing in fuel consumption of the fishing vessel loaded with LED fishing lamp is about 7 to 1, showing most of the fuel is consumed more in sailing than in squid-jigging operation . As for a catch of squid , the control vessel loaded with MH (Metal Halide ) fishing lamp had more catch of 600- 7,080 squids than the vessel loaded with LED fishing lamp having a catch of 260- 1,700 squids . In addition , even in the comparison of a catch per automatic jigging machine , the catch of the vessel loaded with MH fishing lamp excelled that of the vessel loaded with LED fishing lamp in 6 operations of squid jigging out of 9 operations . The ratio of hand-jigging and automatic jigging machine (one","PeriodicalId":211073,"journal":{"name":"Bulletin of The Korean Society of Fisheries Technology","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134390019","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 : 2011-08-31DOI: 10.3796/KSFT.2011.47.3.173
H. Jo, Seon-Jae Hwang, Jihoon Lee, D. An, D. Moon
The purpose of this paper is to provide useful information for fishermen in the manner of investigation a sinking speed of current type tuna longline gear at the North Pacific Ocean as a new developed tuna longline fishing ground. The sinking depth of mainline in connection with different basket was investigated. The experiments were also performed with different materials such as Supermansen (i.e., PE) and Hitech (i.e., PA) for the mainline to investigate the sinking depth of mainline and hooks. Furthermore, the relation between the sinking depth of hooks and catches are investigated also. The sinking depth of mainline at the first and the last shooting basket shows deeper than that of middle part of a basket due to reduced shortening ratio. The sinking depth of mainline and hook with Hitech material shows more shallow than that of Supermanse material, even the Hitech case was designed to sink deeper than that of Supermanse case. The highest catches arise at the middle part basket as the hook number 7 with around 248m sinking depth. From the results, longline with Hitech material is needed to increase the sinking force for reaching the relevant sinking depth. Moreover, the current strength at the North Pacific Ocean will be considered for further commercial fishing.
{"title":"Sinking depth of tuna longlines related to mainline materials in the North Pacific Ocean","authors":"H. Jo, Seon-Jae Hwang, Jihoon Lee, D. An, D. Moon","doi":"10.3796/KSFT.2011.47.3.173","DOIUrl":"https://doi.org/10.3796/KSFT.2011.47.3.173","url":null,"abstract":"The purpose of this paper is to provide useful information for fishermen in the manner of investigation a sinking speed of current type tuna longline gear at the North Pacific Ocean as a new developed tuna longline fishing ground. The sinking depth of mainline in connection with different basket was investigated. The experiments were also performed with different materials such as Supermansen (i.e., PE) and Hitech (i.e., PA) for the mainline to investigate the sinking depth of mainline and hooks. Furthermore, the relation between the sinking depth of hooks and catches are investigated also. The sinking depth of mainline at the first and the last shooting basket shows deeper than that of middle part of a basket due to reduced shortening ratio. The sinking depth of mainline and hook with Hitech material shows more shallow than that of Supermanse material, even the Hitech case was designed to sink deeper than that of Supermanse case. The highest catches arise at the middle part basket as the hook number 7 with around 248m sinking depth. From the results, longline with Hitech material is needed to increase the sinking force for reaching the relevant sinking depth. Moreover, the current strength at the North Pacific Ocean will be considered for further commercial fishing.","PeriodicalId":211073,"journal":{"name":"Bulletin of The Korean Society of Fisheries Technology","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124389640","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 : 2011-08-31DOI: 10.3796/KSFT.2011.47.3.257
Chongguang Bi, Dong-Joon Kim, Jong-heon Park, Kyong-Cheol Min, Jae-Sang Lee
Recently , the manufacturers of life -jacket are very interested in the acquisition of USCG (US Coast Guard ) approval because the acquisition of USCG approval has an important role in the purchasing decision of the buyer ’ s. Be based on criterion of USCG , we studied how to predict the change of floating position of human model with life -jacket to verify the backside restore . For this , in this study , the human model and the life jacket was modeled in three dimension , the application program for prediction of floating position was developed , and plugged -in commercial program .
{"title":"The prediction of floating position of human model after wearing life-jacket based on the three dimensional modeling","authors":"Chongguang Bi, Dong-Joon Kim, Jong-heon Park, Kyong-Cheol Min, Jae-Sang Lee","doi":"10.3796/KSFT.2011.47.3.257","DOIUrl":"https://doi.org/10.3796/KSFT.2011.47.3.257","url":null,"abstract":"Recently , the manufacturers of life -jacket are very interested in the acquisition of USCG (US Coast Guard ) approval because the acquisition of USCG approval has an important role in the purchasing decision of the buyer ’ s. Be based on criterion of USCG , we studied how to predict the change of floating position of human model with life -jacket to verify the backside restore . For this , in this study , the human model and the life jacket was modeled in three dimension , the application program for prediction of floating position was developed , and plugged -in commercial program .","PeriodicalId":211073,"journal":{"name":"Bulletin of The Korean Society of Fisheries Technology","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132682135","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 : 2011-08-31DOI: 10.3796/KSFT.2011.47.3.203
C. Zhang, H. Park, Hyeok-Chan Kwon
The age and growth of flathead grey mullet , Mugil cephalus , were studied using samples collected from the coastal water of Yeosu from September 2009 to August 2010. Spawning season estimated from the gonadosometic index (GSI ) was from November to January . A method for increasing the readability of the otolith was described and criteria for the interpretation of otolith was provided . The annual ring was formed in September once a year . Annual ring in otolith for flathead grey mullet is validated for fish aged 1-8 using the marginal increment analysis . Using the sectioned otolith , between reader precision was 84%. Also , Within -reader agreement for sectioned otolith age readings was higher (reader 1〓84%, reader 2〓87%). The relationship between fork length and total weight was TW 〓0.022 FL 2.818 . The estimated von Bertalanffy growth parameters for the flathead grey mullet were L∞〓67.97 cm K〓0.164/ year and to〓－ 0.81 year .
对2009年9月至2010年8月在丽水沿海水域采集的平头灰鲻鱼(Mugil cephalus)的年龄和生长进行了研究。根据促性腺指数(GSI)估计产卵季节为11月至次年1月。描述了一种提高耳石可读性的方法，并提供了耳石解释的标准。每年9月形成一次年轮。使用边际增量分析验证了1-8岁平头灰鲻鱼耳石的年环。使用切片耳石，读取精度为84%。此外，对分段耳石年龄读数的一致度也较高(1号为84%，2号为87%)。叉长与总重的关系为TW = 0.022 FL 2.818。平头灰鲻鱼的von Bertalanffy生长参数估计为L∞= 67.97 cm K = 0.164/年和to = - 0.81年。
{"title":"Age and growth of the flathead grey mullet (Mugil cephalus ) in the coastal water of Yeosu","authors":"C. Zhang, H. Park, Hyeok-Chan Kwon","doi":"10.3796/KSFT.2011.47.3.203","DOIUrl":"https://doi.org/10.3796/KSFT.2011.47.3.203","url":null,"abstract":"The age and growth of flathead grey mullet , Mugil cephalus , were studied using samples collected from the coastal water of Yeosu from September 2009 to August 2010. Spawning season estimated from the gonadosometic index (GSI ) was from November to January . A method for increasing the readability of the otolith was described and criteria for the interpretation of otolith was provided . The annual ring was formed in September once a year . Annual ring in otolith for flathead grey mullet is validated for fish aged 1-8 using the marginal increment analysis . Using the sectioned otolith , between reader precision was 84%. Also , Within -reader agreement for sectioned otolith age readings was higher (reader 1〓84%, reader 2〓87%). The relationship between fork length and total weight was TW 〓0.022 FL 2.818 . The estimated von Bertalanffy growth parameters for the flathead grey mullet were L∞〓67.97 cm K〓0.164/ year and to〓－ 0.81 year .","PeriodicalId":211073,"journal":{"name":"Bulletin of The Korean Society of Fisheries Technology","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133337794","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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