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

Gatica, M.C.; Monti, Gustavo; Knowles, Toby G; Gallo, Carmen

doi:10.4067/s0301-732x2010000300010

Cited by 11 publications

(9 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar increases were observed after fish were pumped from resting cages (Gatica and others 2005), and high cortisol concentrations due to the acute stress of crowding in the net before pumping and the more intense stress of the pumping itself have been observed by Reddy and Leatherland (1998) and J. M. Mancea (personal communication). Skjervold and others (2001a) also observed that the concentration of cortisol was increased more by crowding than by live-chilling.…”

Section: Discussionsupporting

confidence: 69%

“…Glucose and cortisol are considered to be among the most useful and important indicators of stress in fish (Svobodová and others 1999), but in the present study the concentration of glucose did not increase as a result of the stress of pumping, as was observed in a study by Gatica and others (2005); the liver stores may have been depleted by the severity of the handling process before pumping.…”

Section: Discussionsupporting

confidence: 49%

“…There was a significant increase in lactate concentration after pumping (stage 4) in the open well-boat system (Table 3); the increased concentration reflects the increased levels of physical activity in response to the different stages of transport (Grutter and Pankhurst 2000). Previous studies have shown that the initial capture and loading procedure induces a strong stress response (Iversen and others 1998), but crowding and then pumping the fish over long distances has an even greater effect (Gatica and others 2005). Thomas and others (1999) observed significant increases in plasma lactate in two species of salmonids after lowering the water level to simulate handling during harvest, which stimulates physical activity.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Muscle pH, rigor mortis and blood variables in Atlantic salmon transported in two types of well‐boat

et al. 2010

View full text Add to dashboard Cite

Two systems for transporting live salmon (Salmo salar) were compared in terms of their effects on blood variables, muscle pH and rigor index: an 'open system' well-boat with recirculated sea water at 13.5 degrees C and a stocking density of 107 kg/m3 during an eight-hour journey, and a 'closed system' well-boat with water chilled from 16.7 to 2.1 degrees C and a stocking density of 243.7 kg/m3 during a seven-hour journey. Groups of 10 fish were sampled at each of four stages: in cages at the farm, in the well-boat after loading, in the well-boat after the journey and before unloading, and in the processing plant after they were pumped from the resting cages. At each sampling, the fish were stunned and bled by gill cutting. Blood samples were taken to measure lactate, osmolality, chloride, sodium, cortisol and glucose, and their muscle pH and rigor index were measured at death and three hours later. In the open system well-boat, the initial muscle pH of the fish decreased at each successive stage, and at the final stage they had a significantly lower initial muscle pH and more rapid onset of rigor than the fish transported on the closed system well-boat. At the final stage all the blood variables except glucose were significantly affected in the fish transported on both types of well-boat.

show abstract

Section: Discussionsupporting

confidence: 69%

Section: Discussionsupporting

confidence: 49%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Muscle pH, rigor mortis and blood variables in Atlantic salmon transported in two types of well‐boat

et al. 2010

View full text Add to dashboard Cite

show abstract

“…The results showed that SOD and GST activities were higher, while CAT activities were lower when compared to the control farms (Huang et al, 2007). Moreover, the concerted elevation of SOD and GST activities was equally indicated in the plasma of Atlantic salmon exposed to handling stress (Gatica et al, 2010). Conversely, misbalanced antioxidant activities were reported by Martins et al (2002) in the various oxidative stress biomarkers in the Oreochromis niloticus exposed to various handling stress in the culture medium.…”

Section: Discussionmentioning

confidence: 82%

Effect of Handling Stress on Selected Antioxidants in two Sizes of African Catfish (Clarias Gariepinus)

2019

International Journal of Innovative Studies in Aquatic Biology

View full text Add to dashboard Cite

Variations in some antioxidants (Catalase, Superoxide dismutase and Glutathione-S-Transferase) in the plasma of juveniles and adult sizes of Clarias gariepinus exposed to three on-farm procedures (starvation, overcrowding and sorting) were determined spectrophotometrically to evaluate oxidative stress in fish exposed to these aquaculture operations. Blood samples were collected from juveniles and adults of catfish exposed to these conditions. The samples were analyzed with Randox test kits. Results from antioxidants analysis showed that the control values of catalase (CAT) superoxide dismutase (SOD) and Glutathione-S-transferase (GST) enzymes activities in the plasma of C.gariepinus (juveniles and adults) from control farm ranged between (0.71-0.85Umg/protein); (0.38-0.50Umg/protein) and (0.34-0.37Umg/protein) respectively. In juvenile and adult fish exposed to these handling stress, the catalase reduced significantly (P<0.05) in both sizes when compared to the control, while Superoxide dismutase and Glutathione transferase values increased significantly. These alterations were more pronounced in the juvenile fish than adult. An indication that juvenile fish were more stressed than adult fish in the rearing facilities.

show abstract

“…According to a number of authors (Acerete et al, 2009;Gatica et al, 2010;Viegas et al, 2012;Dliveira et al, 2015), this procedure is inadequate because to cope with stress incurred before and during the ordeal, fish deplete energy reserves that should be used in postmortem metabolism, which may compromise the preservation of meat freshness and quality. The present study evaluated pre-slaughter tambaqui response to stress and assessed the consequences in fish slaughtered by asphyxia or hypothermia, storing fish in ice and accompanying rigor mortis and changes in quality parameters.…”

Section: Introductionmentioning

confidence: 99%

Advantages of recovery from pre-slaughter stress in tambaqui Colossoma macropomum (Cuvier 1816) agroindustry in the Amazon

et al. 2017

View full text Add to dashboard Cite

Tambaqui is the main fish species farmed in the Amazon. It is produced on industrial scale, slaughtered in the field, primarily by post-harvest asphyxia. This procedure, however, is stressful because it depletes energy reserves that should be used in postmortem metabolism, which may compromise fish meat freshness and quality. The present study compared the quality of tambaquis slaughtered by asphyxia, the conventional industrial method, and hypothermia. Tambaquis weighing around 1.6 kg were harvested from dugout ponds, transported to experimental tanks and allowed to recover from transport stress for 48h. Biological parameters of fish were evaluated alive post-harvest (Harv), transport (Tr) and recovery (Rc), and postmortem analysis was performed in fish slaughtered by asphyxia (Asph) or hypothermia (Hyp) after transport and recovery. Initial observations showed that the content of total volatile nitrogen bases (TVB-N) and pH were higher in fish killed by asphyxia. Sensory analysis indicated that the quality of fish slaughtered immediately after transport was lower than in fish allowed to recover from pre-slaughter stress. The results suggest that recovery from pre-slaughter stress contributes to preserving meat freshness and quality in tambaquis slaughtered on an industrial scale, but other studies are required to determine the feasibility of this recommendation.

show abstract

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

Cited by 11 publications

References 32 publications

Muscle pH, rigor mortis and blood variables in Atlantic salmon transported in two types of well‐boat

Muscle pH, rigor mortis and blood variables in Atlantic salmon transported in two types of well‐boat

Effect of Handling Stress on Selected Antioxidants in two Sizes of African Catfish (Clarias Gariepinus)

Advantages of recovery from pre-slaughter stress in tambaqui Colossoma macropomum (Cuvier 1816) agroindustry in the Amazon

Contact Info

Product

Resources

About