Juvenile and Trash Fish Excluder Device (JTED) for Taiwanese Bottom Trawl
Juvenile and trash fish excluder devices (JTEDs) are used to mitigate the ecological impact of trawling. Trawling has a large ecological footprint in Taiwan. Thus, this study designed three JTEDs, which differed only in grid interval, for single boat bottom otter trawls that are commonly used in Tai...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-03-01
|
| Series: | Fishes |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2410-3888/8/4/189 |
| _version_ | 1827745080506580992 |
|---|---|
| author | Chao-Ching Chen Hsin-Zong Lin Kuo-Wei Lan |
| author_facet | Chao-Ching Chen Hsin-Zong Lin Kuo-Wei Lan |
| author_sort | Chao-Ching Chen |
| collection | DOAJ |
| description | Juvenile and trash fish excluder devices (JTEDs) are used to mitigate the ecological impact of trawling. Trawling has a large ecological footprint in Taiwan. Thus, this study designed three JTEDs, which differed only in grid interval, for single boat bottom otter trawls that are commonly used in Taiwan. The designed JTEDs were tested in the waters off of Kaohsiung on a Kaohsiung-based bottom trawler, and the results were as follows. (1) At least 300 species were caught, and 189 of these species had little commercial value; their weight accounted for 52.5% of the total catch. (2) The three JTEDs had good exclusion performance. (3) The ratios of the weight of bycatch excluded to the weight of total catch were 7.9%, 29.1%, and 36.2%, for grid intervals of 10, 15, and 20 mm, respectively. (4) JTEDs with grid intervals of 10, 15, and 20 mm were associated with a 0.4%, 11.5%, and 19.0% loss in revenue, respectively. (5) Mature (and thus commercially valuable) <i>Loliginidae</i> tended to be excluded when the grid interval was 20 or (especially) 15 mm. In general, the designed JTEDs should be used at a grid size of 15 mm because this strikes the best balance between profitability and sustainability. |
| first_indexed | 2024-03-11T05:02:02Z |
| format | Article |
| id | doaj.art-59a48c0d5ea04ac08831fea36bca00ed |
| institution | Directory Open Access Journal |
| issn | 2410-3888 |
| language | English |
| last_indexed | 2024-03-11T05:02:02Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fishes |
| spelling | doaj.art-59a48c0d5ea04ac08831fea36bca00ed2023-11-17T19:12:29ZengMDPI AGFishes2410-38882023-03-018418910.3390/fishes8040189Juvenile and Trash Fish Excluder Device (JTED) for Taiwanese Bottom TrawlChao-Ching Chen0Hsin-Zong Lin1Kuo-Wei Lan2Department of Fisheries Production and Management, National Kaohsiung University of Science and Technology, No. 142, Haijhuan Rd., Nanzih Dist., Kaohsiung City 81157, TaiwanDepartment of Fisheries Production and Management, National Kaohsiung University of Science and Technology, No. 142, Haijhuan Rd., Nanzih Dist., Kaohsiung City 81157, TaiwanDepartment of Environmental Biology and Fisheries Science, National Taiwan Ocean University, No. 2, Beining Rd., Zhongzheng Dist., Keelung City 20224, TaiwanJuvenile and trash fish excluder devices (JTEDs) are used to mitigate the ecological impact of trawling. Trawling has a large ecological footprint in Taiwan. Thus, this study designed three JTEDs, which differed only in grid interval, for single boat bottom otter trawls that are commonly used in Taiwan. The designed JTEDs were tested in the waters off of Kaohsiung on a Kaohsiung-based bottom trawler, and the results were as follows. (1) At least 300 species were caught, and 189 of these species had little commercial value; their weight accounted for 52.5% of the total catch. (2) The three JTEDs had good exclusion performance. (3) The ratios of the weight of bycatch excluded to the weight of total catch were 7.9%, 29.1%, and 36.2%, for grid intervals of 10, 15, and 20 mm, respectively. (4) JTEDs with grid intervals of 10, 15, and 20 mm were associated with a 0.4%, 11.5%, and 19.0% loss in revenue, respectively. (5) Mature (and thus commercially valuable) <i>Loliginidae</i> tended to be excluded when the grid interval was 20 or (especially) 15 mm. In general, the designed JTEDs should be used at a grid size of 15 mm because this strikes the best balance between profitability and sustainability.https://www.mdpi.com/2410-3888/8/4/189trawlbycatchjuvenile and trash fishbycatch reduction devices (BRDs)juvenile and trash fish excluder device (JTED) |
| spellingShingle | Chao-Ching Chen Hsin-Zong Lin Kuo-Wei Lan Juvenile and Trash Fish Excluder Device (JTED) for Taiwanese Bottom Trawl Fishes trawl bycatch juvenile and trash fish bycatch reduction devices (BRDs) juvenile and trash fish excluder device (JTED) |
| title | Juvenile and Trash Fish Excluder Device (JTED) for Taiwanese Bottom Trawl |
| title_full | Juvenile and Trash Fish Excluder Device (JTED) for Taiwanese Bottom Trawl |
| title_fullStr | Juvenile and Trash Fish Excluder Device (JTED) for Taiwanese Bottom Trawl |
| title_full_unstemmed | Juvenile and Trash Fish Excluder Device (JTED) for Taiwanese Bottom Trawl |
| title_short | Juvenile and Trash Fish Excluder Device (JTED) for Taiwanese Bottom Trawl |
| title_sort | juvenile and trash fish excluder device jted for taiwanese bottom trawl |
| topic | trawl bycatch juvenile and trash fish bycatch reduction devices (BRDs) juvenile and trash fish excluder device (JTED) |
| url | https://www.mdpi.com/2410-3888/8/4/189 |
| work_keys_str_mv | AT chaochingchen juvenileandtrashfishexcluderdevicejtedfortaiwanesebottomtrawl AT hsinzonglin juvenileandtrashfishexcluderdevicejtedfortaiwanesebottomtrawl AT kuoweilan juvenileandtrashfishexcluderdevicejtedfortaiwanesebottomtrawl |