Size selectivity of gill net for female snow crab, Chionoecetes opilio

Park, Chang-Doo; H, An; Cho, Sam-Kwang; Bae, Bong-Seong; Park, Hae-Hoon; Bae, Jong‐Sup; Kim, Sujeong

doi:10.3796/ksft.2009.45.2.122

Cited by 10 publications

(15 citation statements)

References 6 publications

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“…al., 2004;Millar and Walsh, 1992;Kim et al, 2012) 등이 사용되고 있다. 본 연구에 서는 어획 대상 생물인 꽃게가 망지에 얽혀서 어 획되는 특성을 고려하여 Kitahara 방법을 사용하 여 망목 선택성을 분석하였다 (Fujimori et al, 1996;Cho et al, 2000;Park et al, 2003;Park et al, 2009, Kim et al, 2010 Kitahara, 1968;Park et al, 2003;Park et al, 2011). Fujimori et al, 1996;Park et al, 2003;Jo et al, 2006).…”

Section: 망목 선택성 곡선 추정법unclassified

Mesh selectivity of gill net for swimming crab Potunus trituberculatus in the western coastal waters of Korea

Park¹,

Cho²,

Kim³

et al. 2013

Journal of the Korean society of Fisheries Technology

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Section: 망목 선택성 곡선 추정법unclassified

Mesh selectivity of gill net for swimming crab Potunus trituberculatus in the western coastal waters of Korea

Park¹,

Cho²,

Kim³

et al. 2013

Journal of the Korean society of Fisheries Technology

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“…Gillnets work in the following three ways: sticking, entangling and confining the gills of the target species into the net. Gillnet gear is widely used to identify the species and length characteristics of catches [4][5][6][7][8][9][10][11][12][13]. Furthermore, gillnet materials and fishing methods differ depending on the country, region, and target species.…”

Section: Introductionmentioning

confidence: 99%

A Machine Learning Technique for Deriving the Optimal Mesh Size of a Gizzard Shad (Konosirus punctatus) Gillnet

Koo,

Kwon

2024

JMSE

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Gizzard shads are facing a continual decline in population, necessitating the implementation of selective gear design for effective resource management. This study aims to prevent the bycatch of young gizzard shads, a non-target fish species, and to derive mesh sizes appropriate for fishery management. Experimental fishing (n = 11) was conducted by manufacturing gillnet fishing gear with different mesh sizes (50.5, 55.1, 60.6, and 67.3 mm) in the coastal waters of the southern Gyeongsang Province. Two methods were employed to estimate the appropriate mesh size of the shad gillnet as follows: firstly, by analyzing the selectivity curve based on body length data; secondly, by developing a complex machine learning model considering biological and economic factors. Model 1 was constructed using mesh variables to classify the score groups. As a result of this study, the total length with a 0.5 gillnet selection ratio. which was estimated to be 179.3, 195.6, 215.1, and 238.9 mm for the 50.5, 55.1, 60.6, and 67.3 mm mesh sizes, respectively. In Model 1, a mesh size of 57.85 mm or less was determined as the most appropriate mesh size. Therefore, considering both biological and economic aspects, shad gillnets should have a mesh size in the 50.5 to 55.1 mm range.

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“…In blackfin flounder fishery, tie-down gillnet with different mesh sizes could be reduce the bycatch of the immature flounders and the research on mesh size selectivity in trammel nets were conducted for 17 species in the Atlantic oceans; however, their performance is unclear while further studies are still needed in different areas and methods (An et al, 2003;He, 2006;Park and Bae, 2017;KOSIS, 2020). Recently, researches were conducted on selectivity as a function of different mesh sizes (Cho et al, 2000;Park et al, 2003;Haas, 2010). It was reported that the fishing performance of gillnets varies depending on the stretched height of the net between the float line and the foot rope, mesh size selectivity and that the shape of gillnets (e.g.…”

Section: Introductionmentioning

confidence: 99%

The application of tie-down gillnet to improve the capture of blackfin flounder (Glyptocephalus stelleri) in a sustainable way

Kim

2023

Front. Mar. Sci.

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In this study, experimental fishing trials were performed to quantitatively evaluate and compare the fishing performance of trammel nets, tie-down gillnets, and single gillnets used for catching blackfin flounder. A total of eight cruises performed at depths of 100–140 m in the waters near Yangyang, Gangwon-do, Korea. Fisheries laws in Korea currently restrict the use of trammel nets due to concerns about overfishing and bycatch. Tie-down gillnets have a support line that changes their stretched height, thus increasing their catch rate, and are an attractive alternative to trammel nets or single gillnets; unmodified gillnet. Due to a lack of quantitative evaluation of their fishing performance, the performances of these three types of gillnets quantitatively compared. The number and weight of fish, particularly blackfish flounder, caught by each net under similar circumstances were compared. Our results suggest that the fishing performance of trammel nets and tie-down gillnets is much higher than that of single gillnets. Compared to single gillnets, trammel nets performed better by 2.98 times and 2.45 times, in terms of the total number and weight of fish caught, respectively, and tie-down gillnets performed better by 2.09 times and 1.97 times, respectively. In addition, the bycatch rate of tie-down gillnet for immature blackfin flounder with the total length less than 20 centimeters was similar to single gillnet; single gillnet 17.5% of immature blackfin flounder, tie-down 20% of immature blackfin flounder, trammel net 62.5% of immature blackfin flounder. Given that many flat fish such as flounders fall out of the net during the fishing process after being stuck in single gillnets, fishermen hope to use trammel nets. However, the relatively high catch rate of trammel nets likely necessitates restrictions for their use. This study suggests that tie-down gillnets are an option for sustainable fishing practice given that they perform better than single gillnet and reduce bycatch of immature blackfin flounder when compared to trammel nets.

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Size selectivity of gill net for female snow crab, Chionoecetes opilio

Cited by 10 publications

References 6 publications

Mesh selectivity of gill net for swimming crab Potunus trituberculatus in the western coastal waters of Korea

Mesh selectivity of gill net for swimming crab Potunus trituberculatus in the western coastal waters of Korea

A Machine Learning Technique for Deriving the Optimal Mesh Size of a Gizzard Shad (Konosirus punctatus) Gillnet

The application of tie-down gillnet to improve the capture of blackfin flounder (Glyptocephalus stelleri) in a sustainable way

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