수산해양기술연구 (Online)最新文献

A study on the measurement method of raw laver weight using load cell 用称重传感器测量紫菜原料重量的方法研究

수산해양기술연구 (Online) Pub Date : 2023-08-30 DOI: 10.3796/ksfot.2023.59.3.215

Eun-Bi MIN, Tae-Jong KANG, Eun-A YOON, Ok-Sam KIM, Doo-Jin HWANG

引用次数: 0

Estimation of maneuvering characteristic of training ship Baek-Kyung according to water depth 基于水深的训练船“白京”号机动特性估计

수산해양기술연구 (Online) Pub Date : 2023-08-30 DOI: 10.3796/ksfot.2023.59.3.263

Chun-Ki LEE, Kyung-Jin RYU, Yoo-Won LEE, Su-Hyung KIM

{"title":"Estimation of maneuvering characteristic of training ship Baek-Kyung according to water depth","authors":"Chun-Ki LEE, Kyung-Jin RYU, Yoo-Won LEE, Su-Hyung KIM","doi":"10.3796/ksfot.2023.59.3.263","DOIUrl":"https://doi.org/10.3796/ksfot.2023.59.3.263","url":null,"abstract":"Recently, universities of fisheries and institutions related to fisheries are actively carrying out a project to build new fisheries training ships. These new fisheries training ships are significantly larger in size and longer in length than the previous ships. In addition, these new ships basically have space that can accommodate more than 100 crew and passenger. On the other hand, they are excluded from IMO maneuverability evaluation since the size of these ships are still less than 100 m in length (LBP). These results have had an impact on the study of maneuverability of fishing vessels including the fisheries training ships. Against these backgrounds, the authors conducted a study to estimate the maneuvering characteristics of fisheries training ship Baek-Kyung according to depth in order to prepare a maneuvering characteristic index that enables the large fisheries training ships to navigate more safely using a modified empirical formula. It was confirmed that the maneuvering characteristics of Baek-Kyung changed significantly as the values of the hydrodynamic force coefficients changed as the water depth gradually decreased from around 1.5 (approx. 8 m in depth) of the ratio of the water depth to the ship draft. The results of this study will not only help navigators understand the maneuvering characteristics of Baek-Kyung, but also serve as an indicator when navigating in shallow water. In addition, the accumulation of these results will serve as a basis for future study on maneuverability of fishing vessel types","PeriodicalId":485447,"journal":{"name":"수산해양기술연구 (Online)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136241033","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}

引用次数: 0

A study on species composition and bycatch status of fishes by a three-side fyke net fisheries in Asanho Lake and Chungjuho Lake 浅湖和忠珠湖三面网渔业鱼类种类组成及副渔获状况研究

수산해양기술연구 (Online) Pub Date : 2023-08-30 DOI: 10.3796/ksfot.2023.59.3.196

Min Ah HEO, Heui Chen AN, Wan Ok LEE, Yong Beam PYEON, Seong Hun KIM

{"title":"A study on species composition and bycatch status of fishes by a three-side fyke net fisheries in Asanho Lake and Chungjuho Lake","authors":"Min Ah HEO, Heui Chen AN, Wan Ok LEE, Yong Beam PYEON, Seong Hun KIM","doi":"10.3796/ksfot.2023.59.3.196","DOIUrl":"https://doi.org/10.3796/ksfot.2023.59.3.196","url":null,"abstract":"This study investigated the species composition and bycatch status of fishes by fyke net between June and November 2020 in Asanho lake and Chungjuho lake. During the survey period, the catches in Asanho lake were identified as 2,931 individuals of 16 species from a total of six families and in Chungjuho lake were identified as 1,645 individuals of 14 species from a total of eight families. The dominant species in Asanho lake was Erythroculter erythropterus which accounted for 59.6% of the the total number of individuals and 40.5% of the total biomass caught. The dominant species in Chungjuho lake was Lepomis macrochirus which accounted for 48.2% of the the total number of individuals and Erythroculter erythropterus which accounted for 60.2% of the total biomass caught. The bycatch rates of non-commercial species in Asanho lake and Chungjuho lake were 77.0% and 82.6%, respectively. As a result of analyzing the frequency distribution of the total length of Carassius auratus and Siniperca scherzeri , which were the dominant species among commercial species, the bycatch rate of small individuals was 87.1%, and 42.7%, respectively.","PeriodicalId":485447,"journal":{"name":"수산해양기술연구 (Online)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136241037","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}

引用次数: 0

Population genetics of sand crab Ovalipes punctatus in Korean waters 沙蟹种群遗传Ovalipes punctatus在朝鲜海域

수산해양기술연구 (Online) Pub Date : 2023-08-30 DOI: 10.3796/ksfot.2023.59.3.253

Hyeon Gyu LEE, Se Hun MYOUNG, Jeong-Hoon LEE, Youn Hee CHOI

引用次数: 0

Analysis of profitability deterioration factors of anchovy boat seine fishery in South Korea 韩国渔船围网捕捞凤尾鱼盈利能力恶化因素分析

수산해양기술연구 (Online) Pub Date : 2023-08-30 DOI: 10.3796/ksfot.2023.59.3.271

Seong-Ju MOON, Jong-Kap AHN, Young-Su AN

引用次数: 0

Biomass estimation of fish in Samcheok marine ranching area (MRA) of Korea using the scientific echosounder 利用科学回声探测仪估算韩国三陟海洋牧场(MRA)鱼类生物量

수산해양기술연구 (Online) Pub Date : 2023-08-30 DOI: 10.3796/ksfot.2023.59.3.242

Jungkwan LEE, Geunchang PARK, Sunyoung OH, Sara LEE, Wooseok OH, Doo Jin HWANG, Kyounghoon LEE

引用次数: 0

Understanding the seasonal status of fisheries resource in the East China Sea by using bottom trawl 利用底拖网了解东海渔业资源的季节状况

수산해양기술연구 (Online) Pub Date : 2023-08-30 DOI: 10.3796/ksfot.2023.59.3.231

Hyoung-Ho SHIN, Jungkwan LEE, Geunchang PARK, Byeong Gwon LIM, Doo Jin HWANG, Kyounghoon LEE

引用次数: 0

Development of a low-power remote monitoring module for set-net fish school based on WCDMA 基于WCDMA的集网鱼群低功耗远程监控模块的开发

수산해양기술연구 (Online) Pub Date : 2023-08-30 DOI: 10.3796/ksfot.2023.59.3.206

Donggil LEE, Myungsung KOO, Gyeom HEO, Jiwon CHEONG, Hyohyuc IM, Jaehyun BAE

{"title":"Development of a low-power remote monitoring module for set-net fish school based on WCDMA","authors":"Donggil LEE, Myungsung KOO, Gyeom HEO, Jiwon CHEONG, Hyohyuc IM, Jaehyun BAE","doi":"10.3796/ksfot.2023.59.3.206","DOIUrl":"https://doi.org/10.3796/ksfot.2023.59.3.206","url":null,"abstract":"Fish school monitoring technology is utilized for various purposes, such as boat fishing and resource surveys. With advancements in information and communication technology, this technology has expanded its application to remote areas. Its significance has grown in fishing sites, particularly for improving the efficiency and cost-effectiveness of set-net fishing. Set-net fishing gears are not limited to coastal areas, but are also installed in inland and remote sea regions. Consequently, fishermen require technology that allows them to quickly transmit information about approaching fish schools and enables them to perform long-term monitoring. The development of remote monitoring technology for set-net fish schools must consider crucial design factors such as communication range, transmission speed, power consumption of information modules, and operational expenses. In this study, we developed a low-power remote monitoring module for set-net fish school based on WCDMA. The module was specifically designed to minimize power consumption, allowing for communication over long distances and extended operation times in set-net fishing applications. Furthermore, we developed a web server software application that enables remote access to fish schools and provides real-time weather information. The performance of the developed module was evaluated through set-net fishing site application and experiments with moving ships on the sea. The experimental results demonstrated that the remote monitoring system, consisting of the developed low-power remote monitoring module for set-net fish school based on WCDMA and a fish finder, had an average power consumption of 4.6 W, a maximum communication range of 22.84 km, and a data transmission and reception rate of 98.79%. The maximum fish school information transmission and reception rate was 97.26%","PeriodicalId":485447,"journal":{"name":"수산해양기술연구 (Online)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136241036","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}

引用次数: 0

An experimental study on the size selectivity of fusiform fish by the netting characteristics 利用网眼特性研究梭形鱼的大小选择性

수산해양기술연구 (Online) Pub Date : 2023-08-30 DOI: 10.3796/ksfot.2023.59.3.189

Sena BAEK, Hyungseok KIM, Kyung-Jin RYU, Seonghun KIM

{"title":"An experimental study on the size selectivity of fusiform fish by the netting characteristics","authors":"Sena BAEK, Hyungseok KIM, Kyung-Jin RYU, Seonghun KIM","doi":"10.3796/ksfot.2023.59.3.189","DOIUrl":"https://doi.org/10.3796/ksfot.2023.59.3.189","url":null,"abstract":"This study quantitatively evaluated size selectivity for three netting shapes (T0; regular, T45, T90) and hanging ratio (35%, 70%) of T0 netting used for trawl codend. The size selectivity experiment was performed in a tank using a cube experimental model with a length of 50 cm on one side and 389 experimental individuals, jack mackerel ( Trachurus japonicus ). In the selectivity analysis, a selectivity curve was created based on the selection ratio using a logistic function, and the 25%, 50%, and 70% selection length and selection range    were obtained. The T0 netting was 19.54 cm when the 50% selective length, which is a selectivity evaluation index, had a hanging ratio of 35%, a selection range of 0.51 cm, and 22.70 cm and 3.08 cm for the hanging ratio of 70%. The T45 netting was 24.34 cm and 2.13 cm, and the T90 netting was 23.51 cm and 2.84 cm. The results of the T45 netting and the T90 netting are similar, and the 50% selection length and selection range were relatively larger than the T0 netting. There was a significant difference in the correlation between the circumference of the inner circle of the mesh by the shape of the netting and the body girth of the experimental individual (Pearson test,       ). There was no significant difference in the correlation between the selection ratio by the T0 netting, T45 netting, and T90 netting with a 70% hanging ratio (one-way ANOVA,    ). The results of this study showed that selectivity such as T45 netting and T90 netting appeared when the hanging ratio, which maximizes the area of T0 netting, was maintained at 70%.","PeriodicalId":485447,"journal":{"name":"수산해양기술연구 (Online)","volume":"387 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136241040","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}

引用次数: 0

Species composition and community structure of aquatic organisms caught by the trial fishing gear for Metapenaeus joyneri in the coastal water of Gochang 试验渔具捕虾的种类组成及群落结构在高敞的沿海水域

수산해양기술연구 (Online) Pub Date : 2023-08-30 DOI: 10.3796/ksfot.2023.59.3.221

Young-Hwan JOO, Ho-Young CHANG, Min-Son KIM, Hyun-Su JO

{"title":"Species composition and community structure of aquatic organisms caught by the trial fishing gear for Metapenaeus joyneri in the coastal water of Gochang","authors":"Young-Hwan JOO, Ho-Young CHANG, Min-Son KIM, Hyun-Su JO","doi":"10.3796/ksfot.2023.59.3.221","DOIUrl":"https://doi.org/10.3796/ksfot.2023.59.3.221","url":null,"abstract":"Although the abundance of Metapenaeus joyneri resources with high commercial value was recently confirmed in the outer waters of Gomso Bay, located between Buan-gun and Gochang-gun, Jeollabuk-do, Metapenaeus joyneri resources have not been efficiently utilized due to the absence of fishing gears and methods for a selective Metapenaeus joyneri capture. Therefore, in this study, we adopted shrimp dredge as a trial fishing gear for the Metapenaeus joyneri capture, and analyzed the species composition and cluster community structure of aquatic organisms caught by the shrimp dredge, from May to September 2021 at the coastal waters of Gochang-gun, Jeollabuk-do. During the experimental period, 28 types of marine species of 29,190 individuals and 250,136 g of total biomass were caught. Among them, the population of Metapenaeus joyneri , the target species, dominated by 80.7%, followed by Thrysa chefuensis with 7.1%, and Leiognathus nuchalis with 6.0%, confirming that the fishing ratio of Metapenaeus joyneri was the highest among all species.","PeriodicalId":485447,"journal":{"name":"수산해양기술연구 (Online)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136241034","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}

引用次数: 0