Prediction of shooting trajectory of tuna purse seine fishing

Lee, Chun‐Woo; Lee, Jihoon; Park, Subong

doi:10.1016/j.fishres.2018.07.019

Cited by 3 publications

(4 citation statements)

References 8 publications

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“…Gerombolan ikan dapat dikelilingi secara sempurna jika panjang pukat cincin mampu melingkari gerombolan ikan tanpa mengusik keberadaaan dari ikan tujuan penangkapan. Hal ini sejalan dengan Lee, et al (2018) yang menyatakan bahwa keberhasilan penangkapan dengan pukat cincin apabila keberadaan dari pukat cincin tidak mengganggu gerombolan ikan tersebut atau ikan tidak merasa terusik. Ini terjadi jika jarak antar jaring dan gerombolan ikan tidak berdekatan.…”

Section: Pengaruh Panjang Jaring Pukat Cincin Terhadap Hasil Tangkapanunclassified

“…Hasil tangkapan pukat cincin sangat dipengaruhi kemampuan pukat cincin tersebut dalam melingkari gerombolan ikan. Hal ini sejalan dengan pendapat Lee, et al, (2018) ;Lee, (2016) ;Hare, et al, (2015) yang menyatakan bahwa panjang pukat cincin sangat mempengaruhi hasil tangkapan. Semakin panjang pukat cincin maka semakin besar gerombolan ikan dapat dilingkari dan semakin kecil peluang ikan memberikan reaksi terhadap proses pelingkaran pukat cincin (Tang, et al, 2017).…”

Section: Pengaruh Panjang Jaring Pukat Cincin Terhadap Hasil Tangkapanunclassified

“…Ini untuk menghindari ikanikan yang akan meloloskan diri lewat bawah pukat cincin. Sejalan dengan Lee, et al, (2018), panjang pukat cincin harus sebanding dengan lebarnya. Ikan-ikan yang sudah berada dalam kurungan pukat cincin akan berusaha meloloskan diri lewat bawah jaring yang belum tertutup.…”

Section: Pengaruh Panjang Jaring Pukat Cincin Terhadap Hasil Tangkapanunclassified

“…Selain panjang dan lebar pukat cincin, ukuran tenaga mesin yang digunakan juga harus diperhatikan. Ukuran tenaga mesin sangat menentukan kecepatan optimum kapal tersebut dalam melakukan pelingkaran gerombolan ikan, hal ini berkaitan dengan kecepatan renang dari ikan target ketika mengetahui adanya ancaman yang mendekatinya, hal ini sejalan dengan Lee, et al (2018), Tang, et al, (2017), Lee, (2016), Hare, et al, (2015.…”

Section: Pengaruh Panjang Jaring Pukat Cincin Terhadap Hasil Tangkapanunclassified

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Pengaruh Panjang Jaring Pukat Cincin Terhadap Hasil Tangkapan Nelayan di Perairan Utara Aceh

Chaliluddin,

Rahmah,

Syahputra

et al. 2021

JGT

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This research was conducted for one year, which was divided into 4 quarters. The average of each quarter was used as a replication. This study aimed to determine the composition of purse seine catch and the effect of the length of the purse seine on the catch of fishers in the waters of northern Aceh. The sample in this research is purse seine which has a length of 800 m, 900 m, 1000 m, and 1200 m. The composition of the fishermen's catch during the study was skipjack, mackerel, lemuru, and layang. The test results using ANOVA in the treatment of the ring seine length group obtained the value of F-count is 40.275 or significant (0.000). The ANOVA test on replications obtained a value of F-count is 1.623 or a significance value (0.082), meaning that the length of the 1200 meter seine had a significant effect on the fishermen's catch, while the number of replications, namely the observation time during the study year, had no significant effect on the fishermen's catch.

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Section: Pengaruh Panjang Jaring Pukat Cincin Terhadap Hasil Tangkapanunclassified

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Pengaruh Panjang Jaring Pukat Cincin Terhadap Hasil Tangkapan Nelayan di Perairan Utara Aceh

Chaliluddin,

Rahmah,

Syahputra

et al. 2021

JGT

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Automatic Capture Processing Method of Basketball Shooting Trajectory Based on Background Elimination Technology

Fan

You-hong

Zhang

2022

Advances in Meteorology

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The analysis and prediction of the shooting trajectory can be used to partially correct the shooting. The traditional automatic basketball shooting trajectory capture algorithm has a low capture accuracy and a long capture time, and thus is incapable of displaying the shooting trajectory in real time. To address this issue, this study proposes an automatic basketball shooting trajectory capture algorithm based on background elimination. The image of the basketball shooting trajectory is captured using imaging technology; the image is then preprocessed in four steps: binary erosion, binary expansion, closing operation, and opening operation to create a smooth image. After removing the background from the preprocessed image using the background difference method, the edge contour features are extracted, the candidate target area is set based on the extraction result, and a diagonal matrix reflecting the length and width of the trajectory target is introduced to calculate the probability of the color of the area in the shooting trajectory, thereby characterizing the trajectory. The target’s size changes in two directions to capture the basketball shooting trajectory automatically. The algorithm’s simulation results indicate that it has a higher accuracy and a shorter capture time.

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Estimating the Purse Seine Net Geometry during a Hauling Operation Using a Data Assimilation Method

Gomi,

Takagi,

Suzuki

et al. 2024

Fishes

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The dynamics of fishing nets can be estimated by modeling and numerically computing the forces acting on them. However, the dynamic models of fishing nets are highly nonlinear owing to the significant influence of hydrodynamic forces acting on the net. Therefore, if there are unknown parameters that define the state of motion in the model, it is often difficult to achieve high accuracy in the numerical simulations of fishing gear and evaluate its dynamics. To address this issue, a method is proposed for estimating these unknown parameters by integrating a nonlinear Kalman filter into a fishing net dynamics model. This study aimed to estimate the hauling velocity of large- and medium-sized purse seine fishing nets, which can be a challenging parameter to measure. The calculations are based on the data obtained from a research operation conducted by the Marine Fisheries Research and Development Center in 2019 using the purse seine fishing vessel “Taikei Maru No. 1”. The time series of the hauling-net velocity was estimated based on the results of the estimation experiment. These results allowed the estimation of the hauling velocity and calculation of the net dynamics during the hauling process. This shows that net dynamics simulation is possible even with unknown parameters.

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Prediction of shooting trajectory of tuna purse seine fishing

Cited by 3 publications

References 8 publications

Pengaruh Panjang Jaring Pukat Cincin Terhadap Hasil Tangkapan Nelayan di Perairan Utara Aceh

Pengaruh Panjang Jaring Pukat Cincin Terhadap Hasil Tangkapan Nelayan di Perairan Utara Aceh

Automatic Capture Processing Method of Basketball Shooting Trajectory Based on Background Elimination Technology

Estimating the Purse Seine Net Geometry during a Hauling Operation Using a Data Assimilation Method

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