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Fish slaughter practices in Brazilian aquaculture and their consequences for animal welfare

Published online by Cambridge University Press:  01 January 2023

MEG Coelho ,
AS Pedrazzani ,
MH Quintiliano ,
F Bolfe  and
CFM Molento
MEG Coelho
Affiliation:
Animal Welfare Laboratory, Federal University of Paraná, Rua dos Funcionários 1540, 80035-050, Curitiba, Paraná, Brazil
AS Pedrazzani*
Affiliation:
Animal Welfare Laboratory, Federal University of Paraná, Rua dos Funcionários 1540, 80035-050, Curitiba, Paraná, Brazil
MH Quintiliano
Affiliation:
FAI Farms do Brasil, Estrada Velha do Irere s/n, Fazenda Santa Marta, 86115000, Londrina, Brazil
F Bolfe
Affiliation:
FAI Farms do Brasil, Estrada Velha do Irere s/n, Fazenda Santa Marta, 86115000, Londrina, Brazil
CFM Molento
Affiliation:
Animal Welfare Laboratory, Federal University of Paraná, Rua dos Funcionários 1540, 80035-050, Curitiba, Paraná, Brazil
*
* Contact for correspondence: anasilviap@ufpr.br
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Abstract

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Slaughter is considered an important fish welfare issue. For a slaughter method to be considered humane, effective stunning that lasts until death as well as the reduction of pain and fear throughout all procedures are essential. Our objective was to investigate current techniques for slaughtering fish in Brazil. A digital questionnaire with six multiple-choice and three open questions was distributed to companies registered as fish slaughterhouses and to fish farms in 2019, addressing fish species, quantities processed and slaughter procedures adopted. From 62 facilities in 15 Brazilian states that answered the survey, nine slaughterhouses and 30 fish farms slaughtered fish, totalling 452 tonnes per day. All reported pre-slaughter stunning, and live chilling to be the most commonly cited method (82.0%), followed by electronarcosis (18.0%). Slaughtering techniques included exsanguination (38.5%) and decapitation (2.5%). For the remaining companies, no slaughter method was declared, suggesting death by asphyxiation or by further processing (59.0%). Twenty-nine companies adopted pre-slaughter fasting, lasting from 10 to 48 h. All sites worked with tilapia (100%) and 24 (82.7%) reported that they worked exclusively with this species. Other species reported were: pacu (25.6%), tambacu (17.9%), tambaqui and carp (15.3%), jundiá (12.8%), pintado and pirarucu (7.7%), matrinxã and pangassius (5.1%). Asphyxia and live chilling are not considered humane, as animals remain conscious and, thus, suffer. Results show that most establishments do not perform humane slaughter. This scenario highlights the urgent need for development and enforcement of humane fish slaughter techniques, with routine supervision and normative requirements.

Keywords

animal welfareasphyxiationelectronarcosislive chillingNile tilapiastunning
Type
Research Article
Information
Animal Welfare , Volume 31 , Issue 2 , May 2022 , pp. 187 - 192
Copyright
© 2022 Universities Federation for Animal Welfare

References

Agetsuma, M, Aizawa, H, Aoki, T, Nakayama, R, Takahoko, M, Goto, M, Sassa, T, Kawakami, K and Okamoto, H 2010 The habenula is crucial for experience-dependent modification of fear responses in zebrafish. Nature Neuroscience 13: 1354–1356. https://doi.org/10.1038/nn.2654CrossRefGoogle ScholarPubMed
Bagni, M, Civitareale, C, Priori, A, Ballerini, A, Finoia, M, Brambilla, G and Marino, G 2007 Pre-slaughter crowding stress and killing procedures affecting quality and welfare in sea bass (Dicentrarchus labrax) and sea bream (Sparus aurata). Aquaculture 263: 52–60. https://doi.org/10.1016/j.aquaculture.2006.07.049CrossRefGoogle Scholar
Barton, BA, Ribas, L, Acerete, L and Tort, L 2005 Effects of chronic confinement on physiological responses of juvenile gilt-head sea bream, Sparus aurata L, to acute handling. Aquaculture Research 36: 172–179. https://doi.org/10.1111/j.1365-2109.2004.01202.xCrossRefGoogle Scholar
Blokhuis, HJ, Veissier, I, Miele, M and Jones, B 2010 The Welfare Quality® project and beyond: Safeguarding farm animal well-being. Acta Agriculturae Scandinavica Section A 60(3): 129–140. https://doi.org/10.1080/09064702.2010.523480CrossRefGoogle Scholar
Boyland, N and Brooke, P 2017 Farmed Fish welfare during slaughter. Aquaculture Advisory Council (AAC) Report. September 2017. https://aac-europe.org/images/Slaughter_report__AAC_report.pdfGoogle Scholar
Braithwaite, V 2010 Do Fish Feel Pain? Oxford University Press: Oxford, UKGoogle Scholar
Branson, EJ 2008 Fish Welfare. Blackwell Publishing: Oxford, UK. https://doi.org/10.1017/CBO9781107415324.004CrossRefGoogle Scholar
Browman, HI, Cooke, SJ, Cowx, IG, Derbyshire, SWG, Kasumyan, A, Key, B, Rose, JD, Schwab, A, Skiftesvik, AB, Don Stevens, E, Watson, CA and Arlinghaus, R 2019 Welfare of aquatic animals: Where things are, where they are going, and what it means for research, aquaculture, recreational angling, and com-mercial fishing. ICES Journal of Marine Science 76: 82–92. https://doi.org/10.1093/icesjms/fsy067CrossRefGoogle Scholar
Brown, C 2015 Fish intelligence, sentience and ethics. Animal Cognition 18: 1–17. https://doi.org/10.1007/s10071-014-0761-0CrossRefGoogle ScholarPubMed
Bshary, R, Gingins, S and Vail, AL 2014 Social cognition in fishes. Trends in Cognitive Sciences 18: 465–471. https://doi.org/10.1016/j.tics.2014.04.005CrossRefGoogle ScholarPubMed
Chandroo, KP, Duncan, IJH and Moccia, RD 2004 Can fish suffer? Perspectives on sentience, pain, fear and stress. Applied Animal Behaviour Science 86: 225–250. https://doi.org/10.1016/j.applanim.2004.02.004CrossRefGoogle Scholar
Conte, FS 2004 Stress and the welfare of cultured fish. Applied Animal Behaviour Science 86: 205–223. https://doi.org/10.1016/j.applanim.2004.02.003CrossRefGoogle Scholar
Costa, TD 2019 Fasting and stunning pre-slaughter in Nile tilapia ( Oreochomis niloticus). Doctoral Thesis, Faculty of Animal Science and Food Engineering, Federal University of São Paulo, Pirrassununga, BrazilGoogle Scholar
Davis, KB and Gaylord, TG 2011 Effect of fasting on body com-position and responses to stress in sunshine bass. Comparative Biochemistry and Physiology - Part A Molecular and Integrative Physiology 158: 30–36. https://doi.org/10.1016/j.cbpa.2010.08.019CrossRefGoogle Scholar
De Souza, SMG, Mathies, VD and Fioravanzo, RF 2012 Off-flavor por geosmina e 2-Metilisoborneol na aquicultura. Semina: Ciencias Agrarias 33: 835–846. https://doi.org/10.5433/1679-0359.2012v33n2p835. [Title translation: Methylisoborneol in aquaculture]Google Scholar
EFSA 2018 Guidance on the assessment criteria for applications for new or modified stunning methods regarding animal protection at the time of killing. The EFSA Journal 16: 5343. https://doi.org/10.2903/j.efsa.2018.5343Google Scholar
Ellis, T, Oidtmann, B, St-Hilaire, S, Turnbull, J, North, B, Mac-Intyre, C, Nikolaidis, J, Hoyle, L, Kestin, S and Knowles, T 2008 Fin erosion in farmed fish. In Branson EJ (ed) Fish Welfare pp 121–149. Blackwell: Oxford, UK. https://doi.org/10.1002/9780470697610.ch9CrossRefGoogle Scholar
FAO 2018 The State of World Fisheries and Aquaculture (SOFIA). http://www.fao.org/documents/card/en/c/I9540EN/Google Scholar
FSBI Fisheries Society of the British Isles 2002 Fish welfare. Briefing paper 2. Granta Information Systems 10: 3. https://doi.org/10.1006/fsim.1999.0251Google Scholar
Galhardo, L and Oliveira, R 2006 Bem-estar animal: um concei-to legítimo para peixes? Revista de Etologia 8: 51–61. https://doi.org/10.1590/1089-6891v20e-50241. [Title translation: Animal welfare: a legitimate concept for fish?]Google Scholar
Hamilton, TJ, Myggland, A, Duperreault, E, May, Z, Gallup, J, Powell, RA, Schalomon, M and Digweed, SM 2016 Episodic-like memory in zebrafish. Animal Cognition 19: 1071–1079. https://doi.org/10.1007/s10071-016-1014-1CrossRefGoogle ScholarPubMed
Hastein, T, Scarfe, AD and Lund, VL 2005 Science-based assess-ment of welfare: aquatic animals. Scientific and Technical Review of the Office International des Epizooties 24: 529–547. https://doi.org/10.20506/rst.24.2.1590CrossRefGoogle Scholar
Hoseini, SM, Abtahi, B and Yousefi, M 2019 Effects of fasting on metabolic and immunological responses of common carp (Cyprinus carpio) to a further acute stress. Aquaculture Research 50: 1177–1185. https://doi.org/10.1111/are.13992Google Scholar
Howgate, P 2004 Tainting of farmed fish by geosmin and 2-methyl-iso-borneol: A review of sensory aspects and of uptake/depuration. Aquaculture 234: 155–181. https://doi.org/10.1016/j.aquaculture.2003.09.032CrossRefGoogle Scholar
Jørgensen, EH, Vijayan, MM, Aluru, N and Maule, AG 2002 Fasting modifies Aroclor 1254 impact on plasma cortisol, glucose and lactate responses to a handling disturbance in Arctic charr. Comparative Biochemistry and Physiology - Toxicology and Pharmacology 132: 235–245. https://doi.org/10.1016/S1532-0456(02)00069-8CrossRefGoogle ScholarPubMed
Kim, JH, Jeong, MH, Jun, JC and Kim, TI 2014 Changes in hema-tological, biochemical and non-specific immune parameters of olive flounder, paralichthys olivaceus, following starvation. Asian-Australasian Journal of Animal Sciences 27: 1360–1367. https://doi.org/10.5713/ajas.2014.14110CrossRefGoogle Scholar
Kubitza, F and Kubitza, LMM 2000 Tilápias: qualidade da água, sis-temas de cultivo, planejamento da produção, manejo nutricional e ali-mentar e sanidade – parte I. Panorama Da Aquicultura 10: 45–47. [Title translation: Tilapia: water quality, farming systems, production plan-ning, nutritional and food management and health – part I]Google Scholar
Lambooij, B, Gerritzen, MA, Reimert, H, Burggraaf, D and Van de Vis, JW 2008 A humane protocol for electro-stunning and killing of Nile tilapia in fresh water. Aquaculture 275: 88–95. https://doi.org/10.1016/j.aquaculture.2008.01.026CrossRefGoogle Scholar
Lambooij, E, Grimsbø, E, de Vis, JW, Reimert, HGM, Nortvedt, R and Roth, B 2010 Percussion and electrical stun-ning of Atlantic salmon (Salmo salar) after dewatering and subse-quent effect on brain and heart activities. Aquaculture 300: 107–112. https://doi.org/10.1016/j.aquaculture.2009.12.022CrossRefGoogle Scholar
Lanna, EAT, Pezzato, LE, Cecon, PR, Furuya, WM and Bomfim, MAD 2004 Digestibilidade aparente e trânsito gastrin-testinal em tilápia do Nilo (Oreochromis niloticus), em função da fibra bruta da dieta. Revista Brasileira de Zootecnia 33: 2186–2192. https://doi.org/10.1590/s1516-35982004000900002. [Title translation: Apparent digestibility and gastrointestinal transit in Nile tilapia (Oreochromis niloticus), as a function of dietary crude fibre]CrossRefGoogle Scholar
Lindholm-Lehto, PC, Vielma, J, Pakkanen, H and Alén, R 2019 Depuration of geosmin- and 2-methylisoborneol-induced off-flavors in recirculating aquaculture system (RAS) farmed European white-fish Coregonus lavaretus. Journal of Food Science and Technology: 4585-4594. https://doi.org/10.1007/s13197-019-03910-7CrossRefGoogle Scholar
Lines, JA, Robb, DH, Kestin, SC, Crook, SC and Benson, T 2003 Electric stunning: A humane slaughter method for trout. Aquacultural Engineering 28: 141–154. https://doi.org/10.1016/S0144-8609(03)00021-9CrossRefGoogle Scholar
Lines, JA and Spence, J 2012 Safeguarding the welfare of farmed fish at harvest. Fish Physiology and Biochemistry 38: 153–162. https://doi.org/10.1007/s10695-011-9561-5CrossRefGoogle ScholarPubMed
MAPA (Ministério da Agricultura e Pecuária) 2000 Instrução Normativa nº 3, de 17 de janeiro de 2000. Regulamento técnico de métodos de insensibilização para o abate humanitário de animais de açougue. Diário Oficial da União pp 14–16. 24 January 2000, Rio de Janeiro, Brazil. [Title translation: Technical regulation of stunning methods for humane slaughter of butcher animals]Google Scholar
Pedrazzani, AS, Carneiro, PCF, Kirschnik, PG and Molento, CFM 2009 Impacto negativo de secção de medula e termonarco-se no bem-estar e na qualidade da carne da tilápia-do-Nilo. Revista Brasileira de Saúde e Produção Animal 10: 188–197. [Title translation: Negative impact of marrow section and thermonarcosis on wel-fare and meat quality of Nile tilapia]Google Scholar
Pedrazzani, AS, Quintiliano, MH, Bolfe, F, Sans, ECO and Molento, CFM 2020 Tilapia on-farm welfare assessment protocol for semi-intensive production systems. Frontiers in Veterinary Science 7: 1–16. https://doi.org/10.3389/fvets.2020.606388CrossRefGoogle ScholarPubMed
PeixeBR 2020 Associação Brasileira da Piscicultura. Anuário PeixeBr da Piscicultura 2020. https://www.peixebr.com.br/anuario-2020/. [Title translation: Brazilian Association of Fish Farming. Yearbook of Pisciculture 2020]Google Scholar
Pinto, A, Oates, J, Grutter, A and Bshary, R 2011 Cleaner wrasses labroides dimidiatus are more cooperative in the pres-ence of an audience. Current Biology 21: 1140–1144. https://doi.org/10.1016/j.cub.2011.05.021CrossRefGoogle Scholar
Robb, D and Kestin, SC 2002 Methods used to kill fish: Field observations and literature reviewed. Animal Welfare 11: 269–282Google Scholar
Salwiczek, LH, Prétôt, L, Demarta, L, Proctor, D, Essler, J, Pinto, AI, Wismer, S, Stoinski, T, Brosnan, SF and Bshary, R 2012 Adult cleaner wrasse outperform capuchin monkeys, chim-panzees and orang-utans in a complex foraging task derived from cleaner - client reef fish cooperation. PLoS One 7: 11. https://doi.org/10.1371/journal.pone.0049068CrossRefGoogle Scholar
Schram, E, Kwadijk, C, Hofman, A, Blanco, A, Murk, A, Verreth, J and Schrama, J 2021 Effect of feeding during off-flavour depuration on geosmin excretion by Nile tilapia (Oreochromis niloticus). Aquaculture 531. https://doi.org/10.1016/j.aquaculture.2020.735883CrossRefGoogle Scholar
Sneddon, LU 2003 The evidence for pain in fish: the use of mor-phine as an analgesic. Applied Animal Behaviour Science 83: 153–162. https://doi.org/10.1016/S0168-1591(03)00113-8CrossRefGoogle Scholar
Van De Vis, H, Kestin, S, Robb, D, Oehlenschläger, J, Lambooij, B, Münkner, W, Kuhlmann, H, Kloosterboer, K, Tejada, M, Huidobro, A, Otterå, H, Roth, B, Sørensen, NK, Akse, L, Byrne, H and Nesvadba, P 2003 Is humane slaughter of fish possible for industry? Aquaculture Research 34: 211–220. https://doi.org/10.1046/j.1365-2109.2003.00804.CrossRefGoogle Scholar
Van den Bos, R 2020 Awareness in fish. In: Kristiansen, TS, Fernö, AH, Van de Vis, H and Pavlidis, MA (eds) The Welfare of Fish pp 185–210. Springer: Heidelberg, Germany. https://doi.org/10.1007/978-3-030-41675-1_8CrossRefGoogle Scholar
Van de Vis, H, Abbink, W, Lambooij, B and Bracke, M 2014 Stunning and killing of farmed fish: how to put it into practice? Encyclopedia of Meat Sciences 3: 421–426. https://doi.org/10.1016/B978-0-12-384731-7.00199-9CrossRefGoogle Scholar
World Organisation for Animal Health (OIE) 2021 Aquatic Animal Health Code. http://www.oie.int/standard-setting/aquatic-codeGoogle Scholar