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Pre-Slaughter Stunning Methods Influence the Meat Quality of Arapaima gigas Fillets.

Pre-Slaughter Stunning Methods Influence the Meat Quality of Arapaima gigas Fillets.

Authors :
Braitenbach Cavali J
Vargas Baldi SC
Coutinho Marques Rocha AS
Eloy da Silva E
Taveira Nunes C
Soares EC
de Vargas Schons S
Zanella R
Bianchini Pontuschka R
Vieira Dantas Filho J
Source :
Animals : an open access journal from MDPI [Animals (Basel)] 2024 Apr 11; Vol. 14 (8). Date of Electronic Publication: 2024 Apr 11.
Publication Year :
2024

Abstract

The aim of this study was to evaluate the influence of different stunning methods on the meat quality of Arapaima gigas fillets from fish farming. A total of 48 specimens of A. gigas in the weight class 11.1 to 14.0 kg were investigated; these fish were subjected to different stunning methods for slaughter: ice asphyxia (IA), air asphyxia (AA), electronarcosis (EE) and hypothermia followed by bleeding (HB). Then, data were obtained from the analysis of pH, rigor mortis index (RI), water activity (Aw), instrumental texture (compression strength, firmness and adhesiveness) and blood glucose and via instrumental colourimetry. During the study, for up to 15 days of refrigerated storage, the methods provided pH values below 6.0. A. gigas submitted to EE and HB remained longer in the pre-rigor status. In addition, they expressed lower percentages of Aw. The EE method resulted in better texture assignments in the fillets. The blood glucose values indicated that the fish subjected to EE were less stressed. Concerning instrumental colourimetry, the fillets submitted to EE and HB showed greater luminosity; the fillets subjected to AA showed greater red-green colour intensity, while the fillets subjected to EE showed greater yellow-blue colour intensity. Therefore, the fish did not suffer stress with electronarcosis, and the fillets showed better preservation, juiciness, and tenderness.

Details

Language :
English
ISSN :
2076-2615
Volume :
14
Issue :
8
Database :
MEDLINE
Journal :
Animals : an open access journal from MDPI
Publication Type :
Academic Journal
Accession number :
38672303
Full Text :
https://doi.org/10.3390/ani14081155