This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Open AccessArticle
A Study on the Catch Losses and Mesh Selectivity Related to the Attachment of Marine Mammal Bycatch Reduction Devices on Midwater Trawl Gear
by
Jung-Mo Jung
Jung-Mo Jung ,
Min-Seuk Park
Min-Seuk Park and
Kyu-Suk Choi
Kyu-Suk Choi *
Division of Fisheries Engineering, National Institute of Fisheries Science, Busan 46083, Republic of Korea
*
Author to whom correspondence should be addressed.
Fishes 2024, 9(10), 391; https://doi.org/10.3390/fishes9100391 (registering DOI)
Submission received: 8 September 2024
/
Revised: 25 September 2024
/
Accepted: 27 September 2024
/
Published: 28 September 2024
Abstract
The National Institute of Fisheries Science in Korea is developing marine mammal bycatch reduction devices (BRDs) for high-risk fishing gear, such as trawls. We experimented with two BRD types (guiding nets) attached in front of codend at 30° and 45° angles, and catch losses and mesh size selectivity were investigated. Experimental fishing operations were conducted along the East Coast of South Korea where whales and dolphins are commonly sighted. The catch was classified according to fishing location, BRD type, codend, and covernet, with measurements recorded for body length, maximum girth, and weight. The average selectivity for each haul was analyzed using the ‘selfisher’ package. The catch loss rates with the BRD attached at tilt angles of 30° and 45° were 11% and 29% for common flying squid, 6% and 28% for sailfin sandfish, and 5% and 8% for pearlside. While the mesh selectivity rates for common flying squid and pearlside remained at 0.2–0.5 across all lengths and tilt angles, the mesh selectivity curve for sailfin sandfish was estimated. There were significant differences in catch loss between 30° and 45° angles, with the 30° angle being more effective in catch loss. We observed a masking effect in the codend.
Share and Cite
MDPI and ACS Style
Jung, J.-M.; Park, M.-S.; Choi, K.-S.
A Study on the Catch Losses and Mesh Selectivity Related to the Attachment of Marine Mammal Bycatch Reduction Devices on Midwater Trawl Gear. Fishes 2024, 9, 391.
https://doi.org/10.3390/fishes9100391
AMA Style
Jung J-M, Park M-S, Choi K-S.
A Study on the Catch Losses and Mesh Selectivity Related to the Attachment of Marine Mammal Bycatch Reduction Devices on Midwater Trawl Gear. Fishes. 2024; 9(10):391.
https://doi.org/10.3390/fishes9100391
Chicago/Turabian Style
Jung, Jung-Mo, Min-Seuk Park, and Kyu-Suk Choi.
2024. "A Study on the Catch Losses and Mesh Selectivity Related to the Attachment of Marine Mammal Bycatch Reduction Devices on Midwater Trawl Gear" Fishes 9, no. 10: 391.
https://doi.org/10.3390/fishes9100391
Article Metrics
Article metric data becomes available approximately 24 hours after publication online.