An assessment of discarded catches from the bottom pair trawling fishery in southern Brazil

Authors

  • Luis G. Cardoso Universidade Federal do Rio Grande, Instituto de Oceanografia, Caixa Postal 474, Avenida Itália km 8, CEP 96201-900, Rio Grande, RS, Brazil
  • Danielle da Silveira Monteiro Universidade Federal do Rio Grande, Instituto de Oceanografia, Caixa Postal 474, Avenida Itália km 8, CEP 96201-900, Rio Grande, RS, Brazil - Núcleo de Educação e Monitoramento Ambiental, Rua Maria Araújo, 450, CEP 96207-480, Rio Grande, RS, Brazil
  • Manuel Haimovici Universidade Federal do Rio Grande, Instituto de Oceanografia, Caixa Postal 474, Avenida Itália km 8, CEP 96201-900, Rio Grande, RS, Brazil

DOI:

https://doi.org/10.47193/mafis.3422021010609

Keywords:

Bycatch, discard rates, endangered species, juvenile fish

Abstract

Onboard discards of a fraction of the catch can be considered one of the main issues related to bottom trawling fisheries. The magnitude and composition of the discards still need to be better understood. We assessed the industrial bottom pair trawling fishery’s discards from southern Brazil by monitoring 159 fishing hauls during four fishing trips. From the 318.9 mt captured, 77.7 t were discarded (24%). The discards per haul were highly variable, on average 488.9 kg (95% CI: 433.6-544.2 kg) and 31% (95% CI 28-34%) of the total. The rejected catch comprised 64 species, 37 teleosts (78.4% in weight) and 13 elasmobranchs (21.3% in weight), besides crustaceans, mollusks, cnidarians, and echinoderms. The three most commercially important species in the region (Umbrina canosai, Cynoscion guatucupa, and Micropogonias furnieri) accounted for 13% of the discarded biomass, and most of them were individuals under 20-25 cm. The discard rates and species composition did not change over the last 40 years; however, the discarded biomass for both teleost fishes and elasmobranchs decreased sharply, reflecting the abundance decrease of these groups in the region. This work highlights the need for management measures to reduce the bottom pair trawling fishery discards in southern Brazil.

Downloads

Download data is not yet available.

Metrics

Metrics Loading ...

Author Biography

Luis G. Cardoso, Universidade Federal do Rio Grande, Instituto de Oceanografia, Caixa Postal 474, Avenida Itália km 8, CEP 96201-900, Rio Grande, RS, Brazil

References

Bellido JM, Santos MB, Pennino MG, Valeiras X, Pierce GJ. 2011. Fishery discards and bycatch: solutions for an ecosystem approach to fisheries management? Hydrobiologia. 670, 317. doi:10.1007/s10750-011-0721-5

Cardoso LG, Haimovici M. 2014. Long term changes in the sexual maturity and in the reproductive biomass of the southern king weakfish Macrodon atricauda (Günther, 1880) in southern Brazil. Fish Res. 160: 120-128.

Cavole LM, Cardoso LG, Almeida MS, Haimovici, M. 2018. Unravelling growth trajectories from complicated otoliths - the case of Brazilian codling Urophycis brasiliensis. J. Fish Biol. 92 (5): 1290-1311. doi:10.1111/jfb.13586

Cavole LM, Haimovici M. 2015. The use of otolith microstructure in resolving issues of ageing and growth of young Micropogonias furnieri from southern Brazil. Mar Biol Res. 11 (9): 933-943. doi:10.1080/17451000.2015.1031799

Clucas IJ. 1997. A study of the options for utilization of bycatch and discards from marine capture fisheries. FAO Fish Circ. 928.

Davie S, Lordan C. 2011. Definition, dynamics and stability of métiers in the Irish otter trawl fleet. Fish Res. 111 (3): 145-158.

Dumont LFC, D’Incao F. 2011. By-catch analysis of Argentinean prawn Artemesia longinaris (Decapoda: Penaeidae) in surrounding area of Patos Lagoon, southern Brazil: effects of different rainfall. J Mar Biol Assoc UK. 91 (5): 1059-1072. doi:10.1017/S0025315410001852

[FAO] Food and Agriculture Organization of the United Nations. 2011. International guidelines on bycatch management and reduction of discards. Rome: FAO. 73 p.

Figueiredo JL, Menezes NA. 1978. Manual de peixes marinhos do sudeste do Brasil. II. Teleostei (1). São Paulo: Museu de Zoologia, Universidade de São Paulo. 110 p.

Figueiredo JL, Menezes NA. 1980. Manual de peixes marinhos do sudeste do Brasil. III. Teleostei (2). São Paulo: Museu de Zoologia, Universidade de São Paulo. 90 p.

Fischer LG, Pereira LED, Vieira JP. 2011. Peixes estuarinos e costeiros. Rio Grande: Luciano Gomes Fischer. 130 p.

Gillis DM, Peterman RM, Pikitch EK. 1995. Implications of trip regulations for high-grading: a model of behavior of fisherman. Can J Fish Aquat Sci. 52 (2): 402-415. doi:10.1139/f95-042

Haimovici M. 1998. Present state and perspectives for the southern Brazil shelf demersal fisheries. Fish Manage Ecol. 5 (4): 277-290.

Haimovici M, Cardoso LG. 2016. Long-term changes in the fisheries in the Patos Lagoon estuary and adjacent coastal waters in southern Brazil. Mar Biol Res. 13: 135-150. doi:10.1080/17451000.2016.1228978

Haimovici M, Habiaga RGP. 1982. Rejeição a bordo na pesca de arrasto de fundo no litoral de Rio Grande do Sul num cruzeiro de primavera. Serie Documentos Técnicos de Oceanografia, 2. Rio Grande: FURG.

Haimovici M, Maceira RP. 1981. Observações sobre a seleção a bordo e rejeição na pesca de arrasto de fundo no Rio Grande do Sul. Congresso Brasileiro de Engenharia de Pesca, 2: 401-412.

Haimovici M, Mendonça JT. 1996. Descartes da fauna acompanhante na pesca de arrasto de tangones dirigida a linguados e camarões na plataforma continental do sul do Brasil. Atlantica. 18: 161-177.

Haimovici M, Reis EG. l984. Determinação de idade e crescimento da castanha Umbrina canosai, (Pisces, Sciaenidae) do sul do Brasil. Atlantica. 7: 25-46.

Hall SJ, Mainprize BM. 2005. Managing bycatch and discards: how much progress are we making and how can we do better? Fish Fish. 6 (2): 134-155. doi:10.1111/j.1467-2979.2005.00183.x

Heath MR, Cook RM, Cameron AI, Morris DJ, Speirs DC. 2014. Cascading ecological effects of eliminating fishery discards. Nature Commun. 5 (3893). doi:10.1038/ncomms4893

Hiddink JG, Jennings S, Sciberras M, Szostek CL, Hughes KM, Ellis N, Kaiser MJ. 2017. Global analysis of depletion and recovery of seabed biota after bottom trawling disturbance. Proc Nati Acad Sci USA. 114 (31): 8301-8306. doi:10.1073/pnas.1618858114

Menezes NA, Figueiredo JL. 1980. Manual de peixes marinhos do sudeste do Brasil. IV. Teleostei (3). São Paulo: Museu de Zoologia, Universidade de São Paulo. 96 p.

Menezes NA, Figueiredo JL. 1985. Manual de peixes marinhos do Sudeste do Brasil. V. Teleostei (4). São Paulo: Museu de Zoologia, Universidade de São Paulo. 105 p.

Miranda LV, Haimovici M. 2007. Changes in the population structure, growth and mortality of striped weakfish Cynoscion guatucupa (Sciaenidae, Teleostei) of southern Brazil between 1976 and 2002. Hydrobiologia. 589: 69-78. doi:10.1007/s10750-007-0721-7

Pascoe S. 2000. Economic incentives to discard by-catch in unregulated and individual transferable quotas fisheries. In: Kaiser MJ, De Groot SJ, editors. Effects of fishing on non-target species and habitats. Oxford: Blackwell Science. p. 315-331.

Pérez Roda MA, Gilman E, Huntington T, Kennelly SJ, Suuronen P, Chaloupka M, Medley PA. 2019. A third assessment of global marine fisheries discards. FAO Fish Aquacult Tech Pap. 633.

Rezende GA, Ortega I, Dumont LFC. 2019. Interannual variation of bycatch assemblages of artisanal bottom shrimp-trawling on the Patos Lagoon estuary, Brazil. Reg Stud Mar Sci. 32 (100878). doi:10.1016/j.rsma2019.100878

Samy-Kamal M, Forcada A, Sánchez-Lizaso JL. 2014. Trawling fishery of the western Mediterranean Sea: métiers identification, effort characteristics, landings and income profiles. Ocean Coast Manage. 102: 269-284.

Shannon CE, Weaver W. 1949. The mathematical theory of communication. Urbana: University of Illinois Press.

Vasconcellos MC, Kalikoski DC, Haimovici M, Abdallah PR. 2006. Capacidad excesiva del esfuerzo pesquero en el sistema estuario costero del Sur de Brazil. Capacidad de pesca y manejo pesquero en América Latina y el Caribe. Vol. 461. Rome: FAO. p. 275-311.

Vieira JP, Vasconcellos MC, Silva RE, Fischer LR. 1996. A rejeição do camarão-rosa (Penaeus paulensis) no estuário da Lagoa dos Patos, RS, Brasil. Atlantica. 18 (1): 123-142.

Vooren CM, Klippel S. 2005. Biologia e status de conservação dos tubarões-martelo Sphyrna lewini e S. zygaena. In: Vooren CM, Klippel S, editors. Ações para conservação de tubarões e raias no sul do Brasil. Igaré: Porto Alegre. 262 p.

Downloads

Published

2021-07-01

How to Cite

1.
Cardoso LG, da Silveira Monteiro D, Haimovici M. An assessment of discarded catches from the bottom pair trawling fishery in southern Brazil. Mar Fish Sci [Internet]. 2021Jul.1 [cited 2021Sep.17];34(2):197-210. Available from: https://ojs.inidep.edu.ar/index.php/mafis/article/view/183

Issue

Section

Marine Impacts in the Anthropocene