Catches comparison according to the codend mesh size of stow net on anchor in the West Sea of Korea

Cho, Sam-Kwang; Park, Chang-Doo; Kim, Sujeong; Kim, In-Ok; Cha, Bong-Jin

doi:10.3796/ksft.2010.46.1.001

Cited by 5 publications

(2 citation statements)

References 5 publications

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“…Sensors can measure buoy motions and mooring/rope tensions. Traditionally, the performance analysis of stow nets was checked by test operations or small-scale experiments [15][16][17][18][19][20]. Through numerical simulations, more physical insights for better design and operation are available.…”

Section: Introductionmentioning

confidence: 99%

Response Prediction and Monitoring Feasibility of a Stow Net System Using Measured Environmental Data in the Southwest Coast of Korea

2018

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This paper investigates the response characteristics of a stow net under wave and current excitations, as well as the feasibility of its monitoring system to check net functionality and prevent loss of fishing gears. The stow-net model is based on one of existing types used in southwest coast of South Korea. The measured wave and current data there are acquired and inputted as environmental loads for numerical simulations. The Morison equation for a moving object with equivalent net model is utilized as the external-force estimator, which has been validated by many researchers regarding fish-cage studies. Since the modelling of all the net elements is inefficient in terms of computational time in time-domain simulations, cruder equivalent-drag net elements are devised with equivalent wet mass, projected area, and axial stiffness. The performance of stow net is highly influenced by current velocity. Stow nets submerge more in stronger currents, which results in less wave forces. The proposed monitoring system can provide useful information, such as net functionality and loss of stow net, using the minimum number of monitoring sensors.

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Section: Introductionmentioning

confidence: 99%

Response Prediction and Monitoring Feasibility of a Stow Net System Using Measured Environmental Data in the Southwest Coast of Korea

2018

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“…( Park et al, 2007;Jang et al, 2009;Cho et al, 2010) ( Alverson et al, 1994;Pascoe, 1997;Kelleher, 2005) . FAO (Thiele, 2004).…”

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Catch characteristic and present condition of by-catch & discard of trammel nets fishery in the East Sea

Bae¹,

H²,

Park³

et al. 2010

Bulletin of the Korean society of Fisheries Technology

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For an effective management of fisheries resources, we need fisheries informations necessary for the establishment of reasonable fishing effort and TAC distribution. To study the present state of by-catch and discard of gill-net fishery in the East Sea, we carried out fishing research using trammel nets in the coastal sea of Susan-port (Yangyang), Jangho-port (Samcheok) and Hupo-port (Uljin). As a result, a total of catch of Susan was 259,172g and that of Hopo was 577,638g. Thus Catch of Susan was 1.49 times more than that of Hupo considering the number of used fishing gear. And catch of Janho was 7.4 times more than that of Susan considering the number of experiment. Two methods of by-catch analysis in this study were used, one method is standardizing of listed species catching possible in fishing license, another method is regarding catch species under 1% of total catch as by-catch. As a result of by-catch analysis of two method, by-catch rate of Susan was 6.55% and 5.87% respectively, that of Hupo was 44.70% and 5.24% and that of Jangho was 0.96% and 2.31%. Discard rate of fish in Susan, Hupo and Jangho were 1.59%, 3.42%, 2.23% respectively.

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Development of Low-Resistance Coastal Stow Net Using Numerical Analysis and Model Experiments

Park,

Lee,

Park

et al. 2024

Fishes

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In coastal stow net fishing, the heavy weight of a typical anchor (750–1000 kg) can increase the risk of capsizing the boat and crew member injury during hoisting operations. Thus, to prevent these accidents, a reduction in the anchor weight is required. One strategy to achieve this is to reduce the resistance force of the fishing gear used, which would allow lighter anchors to be employed. This requires the accurate estimation of the resistance force for various gear designs. Therefore, the resistance force and shape during the operation of two representative types of coastal stow nets currently employed in the Korean coastal stow net fishing industry were investigated using simulations and modeling experiments. The modeled fishing gear was divided into four sections according to the mesh size. Based on the results, the twine thickness was reduced in order to target areas of the gear where the greatest resistance was observed, while the front part of the gear was redesigned to prevent the front of the net from being pushed back into a suboptimal shape. The proposed low-resistance fishing gear has the potential to improve occupational safety in the coastal stow net fishing industry.

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Catches comparison according to the codend mesh size of stow net on anchor in the West Sea of Korea

Cited by 5 publications

References 5 publications

Response Prediction and Monitoring Feasibility of a Stow Net System Using Measured Environmental Data in the Southwest Coast of Korea

Response Prediction and Monitoring Feasibility of a Stow Net System Using Measured Environmental Data in the Southwest Coast of Korea

Catch characteristic and present condition of by-catch & discard of trammel nets fishery in the East Sea

Development of Low-Resistance Coastal Stow Net Using Numerical Analysis and Model Experiments

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