A comparison of catch efficiency and bycatch reduction of tuna pole-and-line fisheries using Japan tuna hook (JT-hook) and circle-shaped hook (C-hook)
Khanh Q. Nguyen
A B * , Binh V. Nguyen A C , Huyen T. Phan A , Luong T. Nguyen A , Phuong V. To A and Hao V. Tran A
+ Author Affiliations
- Author Affiliations
A Nha Trang University, 2 Nguyen Dinh Chieu, Nha Trang City, Khanh Hoa Province, Vietnam.
B Fisheries and Oceans Canada, St John’s, NL, A1C 5X1, Canada.
C Vietnam Tuna Association, 9 Nguyen Dinh Chieu, Nha Trang City, Khanh Hoa Province, Vietnam.
Marine and Freshwater Research 73(5) 662-677 https://doi.org/10.1071/MF21288
Submitted: 5 October 2021 Accepted: 6 January 2022 Published: 22 February 2022
© 2022 The Author(s) (or their employer(s)). Published by CSIRO Publishing.
Abstract
Unwanted bycatch of sea turtles in the tuna fisheries is a global challenge. To evaluate whether the incidental catch of sea turtles could be reduced through changes in fishing gear, this study compared catch rates and bycatch in the tuna pole-and-line with the addition of above-water lights (PL) fisheries using a Japan tuna hook (JT-hook) and a circle-shaped hook (C-hook). There were two phases to this study. First, five PL fishing vessels that used traditional JT-hooks were compared with five PL fishing vessels that used circle-shaped hooks throughout 1 full year of fishing. Results showed that C-hooks significantly reduced bycatch of sea turtle, while negligibly increasing the catch of yellowfin (Thunnus albacares) and bigeye (Thunnus obesus) tuna. Second, we conducted the onboard research to investigate the effect of JT-hook v. C-hook on the catch rates of commercial PL fishery. Results showed that there were higher catch rates of long snouted lancefish (Alepisaurus ferox) and wahoo (Acanthocybium solandri), but lower catches of thresher shark (Alopias spp.) on C-hooks, with no significant differences for other species considered. Our results suggest that the use of C-hooks in the PL fishery is beneficial to protected endangered sea turtle species.
Keywords: bycatch mitigation, circle hooks, conservation, ecological benefit, handlines, hook effect, sea turtle, tuna fishery, Vietnamese fisheries.
References
Afonso, AS, Mourato, B, Hazin, H, and Hazin, FHV (2021). The effect of light attractor color in pelagic longline fisheries. Fisheries Research 235, 105822.| The effect of light attractor color in pelagic longline fisheries.Crossref | GoogleScholarGoogle Scholar |
Alós, J, Cerdà, M, Deudero, S, and Grau, AM (2008). Influence of hook size and type on short-term mortality, hooking location and size selectivity in a Spanish recreational fishery. Journal of Applied Ichthyology 24, 658–663.
| Influence of hook size and type on short-term mortality, hooking location and size selectivity in a Spanish recreational fishery.Crossref | GoogleScholarGoogle Scholar |
Beck, N, and Jackman, S (1998). Beyond linearity by default: generalized additive models. American Journal of Political Science 42, 596–627.
| Beyond linearity by default: generalized additive models.Crossref | GoogleScholarGoogle Scholar |
Becker, A, Whitfield, AK, Cowley, PD, Järnegren, J, and Næsje, TF (2013). Potential effects of artificial light associated with anthropogenic infrastructure on the abundance and foraging behaviour of estuary-associated fishes. Journal of Applied Ecology 50, 43–50.
| Potential effects of artificial light associated with anthropogenic infrastructure on the abundance and foraging behaviour of estuary-associated fishes.Crossref | GoogleScholarGoogle Scholar |
Bjørnstad, ON, and Falck, W (2001). Nonparametric spatial covariance functions: Estimation and testing. Environmental and Ecological Statistics 8, 53–70.
| Nonparametric spatial covariance functions: Estimation and testing.Crossref | GoogleScholarGoogle Scholar |
Burns AG (2019) A comparison of circle and J hook performance within the Grenadian pelagic longline fishery. MSc thesis, Nova Southeastern University. Available at https://nsuworks.nova.edu/occ_stuetd/510
Chaloupka, M, Parker, D, and Balazs, G (2004a). Modelling post-release mortality of loggerhead sea turtles exposed to the Hawaii-based pelagic longline fishery. Marine Ecology Progress Series 280, 285–293.
| Modelling post-release mortality of loggerhead sea turtles exposed to the Hawaii-based pelagic longline fishery.Crossref | GoogleScholarGoogle Scholar |
Chaloupka M, Dutton P, Nakano H (2004b) Status of sea turtle stocks in the Pacific. In ‘Papers presented at the Expert Consultation on interactions between sea turtles and fisheries within an ecosystem context’. FAO Fisheries Report number 738, Supplement, pp. 135–164. (Food and Agriculture Organization of the United Nations: Rome, Italy)
CITES (2021 ) CITES − Convention on international trade in endangered species of wild fauna and flora. Appendices I, II, and III. Geneva, Switzerland. Available at http://www.cites.org/eng/app/appendices.shtml
Crawley MJ (2007) ‘The R book.’ (Wiley)
| Crossref |
Curran, D, and Bigelow, K (2011). Effects of circle hooks on pelagic catches in the Hawaii-based tuna longline fishery. Fisheries Research 109, 265–275.
| Effects of circle hooks on pelagic catches in the Hawaii-based tuna longline fishery.Crossref | GoogleScholarGoogle Scholar |
Do TV, Nguyen TP, Nguyen TT, Phan LD (2019) The status of incidental fishing on sea turtle and solutions to reduce the negative effects of fishing on sea turtle in Vietnam. In ‘Marine biology and sustainable development’. (Eds QV Nguyen, HM Do) pp. 337–345. (Natural Science and Technology: Ha Noi, Vietnam) [In Vietnamese with English abstract]
Duong TL (2002) Vietnam fisheries report. In ‘15th Standing Committee on Tuna and Billfish’, 22–27 July 2002, Honolulu, HI, USA. (Eds QV Nguyen, HM Do) p. 166. (University of Hawaii) Available at https://www.soest.hawaii.edu/PFRP/sctb15/SCTB15_report.pdf
Eguchi, T, Gerrodette, T, Pitman, R, Seminoff, J, and Dutton, P (2007). At-sea density and abundance estimates of the olive ridley turtle Lepidochelys olivacea in the eastern tropical Pacific. Endangered Species Research 3, 191–203.
| At-sea density and abundance estimates of the olive ridley turtle Lepidochelys olivacea in the eastern tropical Pacific.Crossref | GoogleScholarGoogle Scholar |
Food and Agriculture Organization of the United Nations (2001 ) Research implementations of adopting the precautionary approach to management of tuna fisheries. FAO Fisheries Circular number 963. FAO, Rome, Italy.
Gilman, E, and Huang, HW (2017). Review of effects of pelagic longline hook and bait type on sea turtle catch rate, anatomical hooking position and at-vessel mortality rate. Reviews in Fish Biology and Fisheries 27, 43–52.
| Review of effects of pelagic longline hook and bait type on sea turtle catch rate, anatomical hooking position and at-vessel mortality rate.Crossref | GoogleScholarGoogle Scholar |
Gilman, E, Zollett, E, Beverly, S, Nakano, H, Davis, K, Shiode, D, Dalzell, P, and Kinan, I (2006). Reducing sea turtle by-catch in pelagic longline fisheries. Fish and Fisheries 7, 2–23.
| Reducing sea turtle by-catch in pelagic longline fisheries.Crossref | GoogleScholarGoogle Scholar |
Gilman, E, Kobayashi, D, Swenarton, T, Brothers, N, Dalzell, P, and Kinan-Kelly, I (2007). Reducing sea turtle interactions in the Hawaii-based longline swordfish fishery. Biological Conservation 139, 19–28.
| Reducing sea turtle interactions in the Hawaii-based longline swordfish fishery.Crossref | GoogleScholarGoogle Scholar |
Gilman, E, Chaloupka, M, and Musyl, M (2018). Effects of pelagic longline hook size on species- and size-selectivity and survival. Reviews in Fish Biology and Fisheries 28, 417–433.
| Effects of pelagic longline hook size on species- and size-selectivity and survival.Crossref | GoogleScholarGoogle Scholar |
Gless, JM, Salmon, M, and Wyneken, J (2008). Behavioral responses of juvenile leatherbacks Dermochelys coriacea to lights used in the longline fishery. Endangered Species Research 5, 239–247.
| Behavioral responses of juvenile leatherbacks Dermochelys coriacea to lights used in the longline fishery.Crossref | GoogleScholarGoogle Scholar |
Holst, R, and Revill, A (2009). A simple statistical method for catch comparison studies. Fisheries Research 95, 254–259.
| A simple statistical method for catch comparison studies.Crossref | GoogleScholarGoogle Scholar |
Huang, HW, Swimmer, Y, Bigelow, K, Gutierrez, A, and Foster, DG (2016). Influence of hook type on catch of commercial and bycatch species in an Atlantic tuna fishery. Marine Policy 65, 68–75.
| Influence of hook type on catch of commercial and bycatch species in an Atlantic tuna fishery.Crossref | GoogleScholarGoogle Scholar |
Jordan, LK, Mandelman, JW, McComb, DM, Fordham, SV, Carlson, JK, and Werner, TB (2013). Linking sensory biology and fisheries bycatch reduction in elasmobranch fishes: a review with new directions for research. Conservation Physiology 1, cot002.
| Linking sensory biology and fisheries bycatch reduction in elasmobranch fishes: a review with new directions for research.Crossref | GoogleScholarGoogle Scholar | 27293586PubMed |
Kerstetter, DW, and Graves, JE (2006). Effects of circle versus J-style hooks on target and non-target species in a pelagic longline fishery. Fisheries Research 80, 239–250.
| Effects of circle versus J-style hooks on target and non-target species in a pelagic longline fishery.Crossref | GoogleScholarGoogle Scholar |
Latun AR, Ali M, Hassan RBR, Billy AN (2019a) An interim report: status of implementation of the ASEAN guidelines on preventing entry of fish and fishery products from IUU fishing activities into the supply chain in Southeast Asia. Available at http://173.249.34.103/bitstream/handle/20.500.12561/1333/Status%20of%20implementation%20of%20the%20ASEAN%20Guidelines%20%281%29.pdf?sequence=2&isAllowed=y
Latun AR, Ali M, Hassan RBR, Katoh M, Pugas AL, Abdullah AFS (2019b) The terminal report of the JTF6 project: combating IUU fishing in Southeast Asia through application of catch certification for international trade in fish and fishery products. SEAFDEC/MFRDMD/SP/46. Available at http://173.249.34.103/bitstream/handle/20.500.12561/1335/JTF6%20IUU%20PROJECT%20TERMINAL%20REPORT.pdf?sequence=1&isAllowed=y
Lehmann, A, Overton, JM, and Leathwick, JR (2002). GRASP: generalized regression analysis and spatial prediction. Ecological Modelling 157, 189–207.
| GRASP: generalized regression analysis and spatial prediction.Crossref | GoogleScholarGoogle Scholar |
Lewison, RL, Freeman, SA, and Crowder, LB (2004). Quantifying the effects of fisheries on threatened species: the impact of pelagic longlines on loggerhead and leatherback sea turtles. Ecology Letters 7, 221–231.
| Quantifying the effects of fisheries on threatened species: the impact of pelagic longlines on loggerhead and leatherback sea turtles.Crossref | GoogleScholarGoogle Scholar |
Lohmann KJ, Wang JH, Boles LC, McAlister J, Lohmann CMF, Higgins B (2006 ) Development of turtle-safe light sticks for use in longline fisheries. In ‘Sea Turtle and Pelagic Fish Sensory Biology: Developing Techniques to Reduce Sea Turtle Bycatch in Longline Fisheries’. (Eds Y Swimmer, R Brill) NOAA Technical Memorandum NMFS-PIFSC-7, pp. 65–76. (US Department of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Pacific Islands Fisheries Science Center)
Nguyen TV (2008 )
Nguyen KQ (2011) The application of the European Community regulation number 1005/2008 on tuna longline fisheries in Khanh Hoa province, Vietnam. MIFM thesis, Univeristy of Tromso, Norway. Available at https://hdl.handle.net/10037/3531
Nguyen PX (2019) Decree number 42/2019/ND-CP on penalties for administrative violations against regulations on fisheries. Available at http://vanban.chinhphu.vn/portal/page/portal/chinhphu/hethongvanban?class_id=1&_page=1&mode=detail&document_id=197039
Nguyen, HGT, and Gao, J (2010). Economic performance of tuna longline fisheries in the central area of Vietnam. Asian Journal of Food and Agro-Industry 3, 432–442.
Nguyen, ATK, and Jolly, CM (2018). Balancing interests of actors in the ocean tuna value chain of Khanh Hoa province, Vietnam. Marine Policy 98, 11–22.
| Balancing interests of actors in the ocean tuna value chain of Khanh Hoa province, Vietnam.Crossref | GoogleScholarGoogle Scholar |
Nguyen, KQ, and Tran, PD (2014). Assessing the quality of tuna caught by handlines with artificial light: case study in Vietnam. Asian Journal of Food and Agro-Industry 7, 1–7.
Nguyen KQ, Tran PD, Nguyen LT (2013 )
Nguyen, KQ, Bayse, SM, Donovan, M, Winger, PD, Løkkeborg, S, and Humborstad, OB (2020). Increased catches of snow crab (Chionoecetes opilio) with luminescent-netting pots at long soak times. Fisheries Research 230, 105685.
| Increased catches of snow crab (Chionoecetes opilio) with luminescent-netting pots at long soak times.Crossref | GoogleScholarGoogle Scholar |
Nguyen, KQ, Tran, PD, Nguyen, LT, To, PV, and Morris, CJ (2021). Use of light-emitting diode (LED) lamps in combination with metal halide (MH) lamps reduce fuel consumption in the Vietnamese purse seine fishery. Aquaculture and Fisheries 6, 432–440.
| Use of light-emitting diode (LED) lamps in combination with metal halide (MH) lamps reduce fuel consumption in the Vietnamese purse seine fishery.Crossref | GoogleScholarGoogle Scholar |
Pacheco, JC, Kerstetter, DW, Hazin, FH, Hazin, H, Segundo, RSSL, Graves, JE, Carvalho, F, and Travassos, PE (2011). A comparison of circle hook and J hook performance in a western equatorial Atlantic Ocean pelagic longline fishery. Fisheries Research 107, 39–45.
| A comparison of circle hook and J hook performance in a western equatorial Atlantic Ocean pelagic longline fishery.Crossref | GoogleScholarGoogle Scholar |
Phung TD (2018) Circular number 21/2018/TT-BNNPTNT dated November 15, 2018 on preparation and submission of fishing reports and fishing logbooks; publishing of list of fishing ports designated to issue statement of fishery products processed from catches, and IUU vessel list. Available at https://www.mard.gov.vn/Pages/vbpq-toanvan.aspx?ItemID=133849
Phung TD (2020) Circular number 13/2020/TT-BNNPTNT dated November 9, 2020 on amendments to Circular number 21/2018/TT-BNNPTNT on record and submission of reports and diaries on fishery activities; announcement of appointed ports for verifying origin of extracted fisheries. Available at https://www.mard.gov.vn/Pages/vbpq-toanvan.aspx?ItemID=144999
Rich C, Longcore T (2005) ‘Ecological consequences of artificial night lighting.’ (Island Press)
Rudershausen, PJ, Buckel, JA, Bolton, GE, Gregory, RW, Averett, TW, and Conn, PB (2012). A comparison between circle hook and J hook performance in the dolphinfish, yellowfish tuna, and wahoo troll fishery off the coast of North Carolina. Fishery Bulletin 110, 156–175.
Sales, G, Giffoni, BB, Fiedler, FN, Azevedo, VNG, Kotas, JE, Swimmere, Y, and Bugoni, L (2010). Circle hook effectiveness for the mitigation of sea turtle bycatch and capture of target species in a Brazilian pelagic longline fishery. Aquatic Conservation 20, 428–436.
| Circle hook effectiveness for the mitigation of sea turtle bycatch and capture of target species in a Brazilian pelagic longline fishery.Crossref | GoogleScholarGoogle Scholar |
Sandman, A, Isaeus, M, Bergström, U, and Kautsky, H (2008). Spatial predictions of Baltic phytobenthic communities: measuring robustness of generalized additive models based on transect data. Journal of Marine Systems 74, S86–S96.
| Spatial predictions of Baltic phytobenthic communities: measuring robustness of generalized additive models based on transect data.Crossref | GoogleScholarGoogle Scholar |
Swimmer Y, Brill RW (2006) ‘Sea turtle and pelagic fish sensory biology: developing techniques to reduce sea turtle bycatch in longline fisheries.’ (US Department of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Pacific Islands). Available at http://www.pifsc.noaa.gov/tech/NOAA_Tech_Memo_PIFSC_7.pdf
Swimmer, Y, Suter, J, Arauz, R, Bigelow, K, López, A, Zanela, I, Bolaños, A, Ballestero, J, Suárez, R, Wang, J, and Boggs, C (2011). Sustainable fishing gear: the case of modified circle hooks in a Costa Rican longline fishery. Marine Biology 158, 757–767.
| Sustainable fishing gear: the case of modified circle hooks in a Costa Rican longline fishery.Crossref | GoogleScholarGoogle Scholar |
Swimmer, Y, Empey Campora, C, Mcnaughton, L, Musyl, M, and Parga, M (2014). Post-release mortality estimates of loggerhead sea turtles (Caretta caretta) caught in pelagic longline fisheries based on satellite data and hooking location. Aquatic Conservation 24, 498–510.
| Post-release mortality estimates of loggerhead sea turtles (Caretta caretta) caught in pelagic longline fisheries based on satellite data and hooking location.Crossref | GoogleScholarGoogle Scholar |
Swimmer, Y, Gutierrez, A, Bigelow, K, Barceló, C, Schroeder, B, Keene, K, Shattenkirk, K, and Foster, DG (2017). Sea turtle bycatch mitigation in US longline fisheries. Frontiers in Marine Science 4, 260.
| Sea turtle bycatch mitigation in US longline fisheries.Crossref | GoogleScholarGoogle Scholar |
Swimmer, Y, Zollett, EA, and Gutierrez, A (2020). Bycatch mitigation of protected and threatened species in tuna purse seine and longline fisheries. Endangered Species Research 43, 517–542.
| Bycatch mitigation of protected and threatened species in tuna purse seine and longline fisheries.Crossref | GoogleScholarGoogle Scholar |
Ta QN (2006) Circular number 02/2006/TT-BTS Guiding the Implementation of the Government’s Decree number 59/2005/ND-CP on Production and Business Conditions of a Number of Fisheries Trades. (Ministry of Agriculture and Rural Development of the Socialist Republic of Vietnam: Ha Noi, Vietnam)
Thompson D (2013) Effects of ships lights on fish, squid and seabirds. Technical report, prepared for Trans-Tasman Resources Ltd. (National Institute of Water & Atmospheric Research Ltd: Wellington, New Zealand)
Tran, PD (2014). Research on the quality of tuna caught by handlines with artificial light in Vietnam. Journal of Fisheries Science and Technology 2014, 61–65.
Tran, PD (2015). Research on influences of fishing methods on Vietnam’s tuna quality. Journal of Agriculture and Rural Development , 104–109.
Tran, PD, Nguyen, LT, To, PV, and Nguyen, KQ (2020). Effects of the trap entrance designs on the catch efficiency of swimming crab Charybdis feriata fishery. Fisheries Research 232, 105730.
| Effects of the trap entrance designs on the catch efficiency of swimming crab Charybdis feriata fishery.Crossref | GoogleScholarGoogle Scholar |
Vietnam Association of Seafood Exporters and Producers (2020) Report on Vietnam seafood exports in 2019. VASEP, Ha Noi, Vietnam.
Vietnam Tuna Association (2020) Assessment of the current using status of Circle hooks in Vietnam Tuna Industry. Technical report submitted to WWF-Vietnam, VINATUNA, Nha Trang, Vietnam.
Vu, VH, and Nguyen, VH (2011). Preliminary comparisons on effective use of circle and J-style hooks in the Vietnamese pelagic longline fishery. Vietnam Journal of Marine Science and Technology , 73–83.
Wallace, BP, Lewison, RL, Mcdonald, SL, Mcdonald, RK, Kot, CY, Kelez, S, Bjorkland, RK, Finkbeiner, EM, Helmbrecht, S, and Crowder, LB (2010). Global patterns of marine turtle bycatch. Conservation Letters 3, 131–142.
| Global patterns of marine turtle bycatch.Crossref | GoogleScholarGoogle Scholar |
Wang, JH, Boles, LC, Higgins, B, and Lohmann, KJ (2007). Behavioral responses of sea turtles to lightsticks used in longline fisheries. Animal Conservation 10, 176–182.
| Behavioral responses of sea turtles to lightsticks used in longline fisheries.Crossref | GoogleScholarGoogle Scholar |
Ward, P, Epe, S, Kreutz, D, Lawrence, E, Robins, C, and Sands, A (2009). The effects of circle hooks on bycatch and target catches in Australia’s pelagic longline fishery. Fisheries Research 97, 253–262.
| The effects of circle hooks on bycatch and target catches in Australia’s pelagic longline fishery.Crossref | GoogleScholarGoogle Scholar |
Watson, JW, Epperly, SP, Shah, AK, and Foster, DG (2005). Fishing methods to reduce sea turtle mortality associated with pelagic longlines. Canadian Journal of Fisheries and Aquatic Sciences 62, 965–981.
| Fishing methods to reduce sea turtle mortality associated with pelagic longlines.Crossref | GoogleScholarGoogle Scholar |
Witzell, WN (1999). Distribution and relative abundance of sea turtles caught incidentally by the US pelagic longline fleet in the western North Atlantic Ocean, 1992–1995. Fishery Bulletin 97, 200–211.
