Abstract

Pacific saury is one of the most economically important species in the northwestern Pacific Ocean. The management of this resource relies on precise input of biological data such as body length and is often hindered by a lack of such data on captured fish. This study explores the potential of electronic monitoring (EM) using off-the-shelf stereo cameras to overcome the challenges of collecting and measuring saury body length from the Pacific saury fishery. Using a calibrated WEEVIEW SID WV3000 3D camera, a total of 252 paired images with different shooting angles and distances were obtained for further measurement using Sebastes Stereo Image Analysis Software (SSIAS). The treatments for the measurement distance (MD) were 30 cm, 60 cm, and 100 cm, for the depression angle (DA) were 30°, 60°, and 90°, and for the position angle (PA) were 0°, 45°, and 315° (− 45°). An assistant calibration (AC) in the form of a 16 cm black ruler was also added used. The SSIAS measurement results indicated that the best measurement was obtained with 0° position angle, 90° depression angle, and 30 cm distance from the target fish. The use of AC in the SSIAS + AC measurement was proven to reduce the measurement error from 2.45 to 8.64% to − 1.86 to 0.01%. This study set the baseline for the application of EM on collecting saury body length and the use of AC has been proven to increase the measurement accuracy.

Details

Title
A preliminary application and its error estimates of a simple stereo-camera measure system for the far-sea fishery of Pacific saury
Author
Ginting, Kevin Pranata 1 ; Rooper, Christopher N. 2 ; Williams, Kresimir 3 ; Huang, Wen-Bin 1 

 National Dong Hwa University, Department of Natural Resources and Environmental Studies, Hualien, Taiwan (GRID:grid.260567.0) (ISNI:0000 0000 8964 3950) 
 Fisheries and Oceans Canada, Pacific Biological Station, Nanaimo, Canada (GRID:grid.23618.3e) (ISNI:0000 0004 0449 2129) 
 National Marine Fisheries Service, Alaska Fisheries Science Center, Seattle, USA (GRID:grid.422702.1) (ISNI:0000 0001 1356 4495) 
Pages
22377
Publication year
2024
Publication date
2024
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
3110577972
Copyright
© The Author(s) 2024. This work is published under http://creativecommons.org/licenses/by-nc-nd/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.