Effects of crowding on blood constituents and flesh quality variables in Atlantic salmon (Salmo salar L.)

The effects of anaesthesia (as a control treatment) and controlled crowding, with its concomitant low oxygen level, on harvest size salmon (Salmo salar) were compared in terms of blood constituents and flesh quality variables, at 0, 1, 4, 7 and 10 days post-mortem. Fish were held in tanks in triplic...

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Autores principales:	Gatica,MC, Monti,GE, Knowles,TG, Gallo,CB
Lenguaje:	English
Publicado:	Facultad de Ciencias Veterinarias, Universidad Austral de Chile 2010
Materias:	stress quality blood pH cortisol
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0301-732X2010000300010
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spelling	oai:scielo:S0301-732X20100003000102010-12-15Effects of crowding on blood constituents and flesh quality variables in Atlantic salmon (Salmo salar L.)Gatica,MCMonti,GEKnowles,TGGallo,CB stress quality blood pH cortisol The effects of anaesthesia (as a control treatment) and controlled crowding, with its concomitant low oxygen level, on harvest size salmon (Salmo salar) were compared in terms of blood constituents and flesh quality variables, at 0, 1, 4, 7 and 10 days post-mortem. Fish were held in tanks in triplicate and were sampled after anaesthetizing with AQUI-S® and after crowding for one hour. Eighteen fish from each treatment were stunned, blood sampled from the posterior aorta and the fish bled by gill cut and filleted. All blood variables with the exception of cortisol were higher (P < 0.05) in crowded fish compared with anaesthetized fish. Initial muscle pH was lower in the crowded fish and only between days 0; 1 and 4. Colour was significantly lighter in crowded than in anaesthetized fish on days 0 and 1. Weight loss was higher (P < 0.05) in the crowded fish and also increased in both treatments with time post mortem. Muscle asthaxantin concentration showed no statistical difference between treatments nor post mortem. It can be concluded that crowding and reduced oxygen level had a negative effect on blood variables and on flesh quality, lowering colour score, lowering initial muscle pH, and increasing the weight loss of fillets.info:eu-repo/semantics/openAccessFacultad de Ciencias Veterinarias, Universidad Austral de ChileArchivos de medicina veterinaria v.42 n.3 20102010-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0301-732X2010000300010en10.4067/S0301-732X2010000300010
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	stress quality blood pH cortisol
spellingShingle	stress quality blood pH cortisol Gatica,MC Monti,GE Knowles,TG Gallo,CB Effects of crowding on blood constituents and flesh quality variables in Atlantic salmon (Salmo salar L.)
description	The effects of anaesthesia (as a control treatment) and controlled crowding, with its concomitant low oxygen level, on harvest size salmon (Salmo salar) were compared in terms of blood constituents and flesh quality variables, at 0, 1, 4, 7 and 10 days post-mortem. Fish were held in tanks in triplicate and were sampled after anaesthetizing with AQUI-S® and after crowding for one hour. Eighteen fish from each treatment were stunned, blood sampled from the posterior aorta and the fish bled by gill cut and filleted. All blood variables with the exception of cortisol were higher (P < 0.05) in crowded fish compared with anaesthetized fish. Initial muscle pH was lower in the crowded fish and only between days 0; 1 and 4. Colour was significantly lighter in crowded than in anaesthetized fish on days 0 and 1. Weight loss was higher (P < 0.05) in the crowded fish and also increased in both treatments with time post mortem. Muscle asthaxantin concentration showed no statistical difference between treatments nor post mortem. It can be concluded that crowding and reduced oxygen level had a negative effect on blood variables and on flesh quality, lowering colour score, lowering initial muscle pH, and increasing the weight loss of fillets.
author	Gatica,MC Monti,GE Knowles,TG Gallo,CB
author_facet	Gatica,MC Monti,GE Knowles,TG Gallo,CB
author_sort	Gatica,MC
title	Effects of crowding on blood constituents and flesh quality variables in Atlantic salmon (Salmo salar L.)
title_short	Effects of crowding on blood constituents and flesh quality variables in Atlantic salmon (Salmo salar L.)
title_full	Effects of crowding on blood constituents and flesh quality variables in Atlantic salmon (Salmo salar L.)
title_fullStr	Effects of crowding on blood constituents and flesh quality variables in Atlantic salmon (Salmo salar L.)
title_full_unstemmed	Effects of crowding on blood constituents and flesh quality variables in Atlantic salmon (Salmo salar L.)
title_sort	effects of crowding on blood constituents and flesh quality variables in atlantic salmon (salmo salar l.)
publisher	Facultad de Ciencias Veterinarias, Universidad Austral de Chile
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0301-732X2010000300010
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Effects of crowding on blood constituents and flesh quality variables in Atlantic salmon (Salmo salar L.)

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