The influence of anaerobic muscle activity, maturation and season on the flesh quality of farmed turbot

B. Roth, A. Imsland, L.H. Stien, A.A.M. Schelvis-Smit, S. Gunnarsson, A. Foss

Research output: Contribution to journalArticleAcademicpeer-review

7 Citations (Scopus)

Abstract

In order to test seasonal, rearing, maturing and anaerobic muscle activity effect on the flesh quality of turbot (Scophthalmus maximus) a total of 80 farmed turbot from three different strains from reared under natural or continuous light were killed by a percussive blow to the head in November (winter, Icelandic strain), March (spring, Portuguese strain) and June (summer, domesticated strain (France turbot)). To test the effect of anaerobic muscle activity, 10 fish were on each occasion pre rigor filleted, where one fillet was used as a control, while the other fillet was electrically stimulated using a squared 5 Hz, 10 V pulsed DC for 3 min. All pre rigor fillets were measured for pH, weighed, wrapped in aluminum foil and stored in polystyrene boxes with ice. After 7 days of storage the fillets were measured instrumentally for pH, drip loss, colour (CIE L* a* b*) and texture properties such as hardness and shear force, while fillet shrinkage and colour (RBG) were evaluated with computer imaging on photographs from a standard lightbox. Results showed that softness of the flesh was mainly influenced by factors associated with growth, such as season, photoperiod and maturation. Anaerobic muscle activity simulated with electrical stimulation caused an increase in drip loss (<1%) and loss of shear force (<4%), but had no effect on hardness or fillet shrinkage. Computer imaging revealed that muscle contractions related to the electrical stimulus forced out blood from the fillet causing less reddishness for the entire storage period. We conclude that a pH drop upon slaughter associated with anaerobic muscle activity has a minor effect on the flesh quality in the short run, while seasonal/alternatively genetic effects are predominant.
Original languageEnglish
Pages (from-to)461-474
JournalAquaculture International
Volume18
Issue number3
DOIs
Publication statusPublished - 2010

Fingerprint

turbot
fillets
maturation
muscle
muscles
hardness
drip loss
shrinkage
shears
image analysis
photoperiod
aluminum foil
contraction
rearing
photograph
Scophthalmus maximus
boxes (containers)
color
muscle contraction
polystyrenes

Keywords

  • salmon salmo-salar
  • halibut hippoglossus-hippoglossus
  • cod gadus-morhua
  • scophthalmus-maximus l
  • atlantic salmon
  • rainbow-trout
  • white muscle
  • oncorhynchus-tshawytscha
  • rigor-mortis
  • shelf-life

Cite this

Roth, B., Imsland, A., Stien, L. H., Schelvis-Smit, A. A. M., Gunnarsson, S., & Foss, A. (2010). The influence of anaerobic muscle activity, maturation and season on the flesh quality of farmed turbot. Aquaculture International, 18(3), 461-474. https://doi.org/10.1007/s10499-009-9257-3
Roth, B. ; Imsland, A. ; Stien, L.H. ; Schelvis-Smit, A.A.M. ; Gunnarsson, S. ; Foss, A. / The influence of anaerobic muscle activity, maturation and season on the flesh quality of farmed turbot. In: Aquaculture International. 2010 ; Vol. 18, No. 3. pp. 461-474.
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abstract = "In order to test seasonal, rearing, maturing and anaerobic muscle activity effect on the flesh quality of turbot (Scophthalmus maximus) a total of 80 farmed turbot from three different strains from reared under natural or continuous light were killed by a percussive blow to the head in November (winter, Icelandic strain), March (spring, Portuguese strain) and June (summer, domesticated strain (France turbot)). To test the effect of anaerobic muscle activity, 10 fish were on each occasion pre rigor filleted, where one fillet was used as a control, while the other fillet was electrically stimulated using a squared 5 Hz, 10 V pulsed DC for 3 min. All pre rigor fillets were measured for pH, weighed, wrapped in aluminum foil and stored in polystyrene boxes with ice. After 7 days of storage the fillets were measured instrumentally for pH, drip loss, colour (CIE L* a* b*) and texture properties such as hardness and shear force, while fillet shrinkage and colour (RBG) were evaluated with computer imaging on photographs from a standard lightbox. Results showed that softness of the flesh was mainly influenced by factors associated with growth, such as season, photoperiod and maturation. Anaerobic muscle activity simulated with electrical stimulation caused an increase in drip loss (<1{\%}) and loss of shear force (<4{\%}), but had no effect on hardness or fillet shrinkage. Computer imaging revealed that muscle contractions related to the electrical stimulus forced out blood from the fillet causing less reddishness for the entire storage period. We conclude that a pH drop upon slaughter associated with anaerobic muscle activity has a minor effect on the flesh quality in the short run, while seasonal/alternatively genetic effects are predominant.",
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Roth, B, Imsland, A, Stien, LH, Schelvis-Smit, AAM, Gunnarsson, S & Foss, A 2010, 'The influence of anaerobic muscle activity, maturation and season on the flesh quality of farmed turbot', Aquaculture International, vol. 18, no. 3, pp. 461-474. https://doi.org/10.1007/s10499-009-9257-3

The influence of anaerobic muscle activity, maturation and season on the flesh quality of farmed turbot. / Roth, B.; Imsland, A.; Stien, L.H.; Schelvis-Smit, A.A.M.; Gunnarsson, S.; Foss, A.

In: Aquaculture International, Vol. 18, No. 3, 2010, p. 461-474.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - The influence of anaerobic muscle activity, maturation and season on the flesh quality of farmed turbot

AU - Roth, B.

AU - Imsland, A.

AU - Stien, L.H.

AU - Schelvis-Smit, A.A.M.

AU - Gunnarsson, S.

AU - Foss, A.

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N2 - In order to test seasonal, rearing, maturing and anaerobic muscle activity effect on the flesh quality of turbot (Scophthalmus maximus) a total of 80 farmed turbot from three different strains from reared under natural or continuous light were killed by a percussive blow to the head in November (winter, Icelandic strain), March (spring, Portuguese strain) and June (summer, domesticated strain (France turbot)). To test the effect of anaerobic muscle activity, 10 fish were on each occasion pre rigor filleted, where one fillet was used as a control, while the other fillet was electrically stimulated using a squared 5 Hz, 10 V pulsed DC for 3 min. All pre rigor fillets were measured for pH, weighed, wrapped in aluminum foil and stored in polystyrene boxes with ice. After 7 days of storage the fillets were measured instrumentally for pH, drip loss, colour (CIE L* a* b*) and texture properties such as hardness and shear force, while fillet shrinkage and colour (RBG) were evaluated with computer imaging on photographs from a standard lightbox. Results showed that softness of the flesh was mainly influenced by factors associated with growth, such as season, photoperiod and maturation. Anaerobic muscle activity simulated with electrical stimulation caused an increase in drip loss (<1%) and loss of shear force (<4%), but had no effect on hardness or fillet shrinkage. Computer imaging revealed that muscle contractions related to the electrical stimulus forced out blood from the fillet causing less reddishness for the entire storage period. We conclude that a pH drop upon slaughter associated with anaerobic muscle activity has a minor effect on the flesh quality in the short run, while seasonal/alternatively genetic effects are predominant.

AB - In order to test seasonal, rearing, maturing and anaerobic muscle activity effect on the flesh quality of turbot (Scophthalmus maximus) a total of 80 farmed turbot from three different strains from reared under natural or continuous light were killed by a percussive blow to the head in November (winter, Icelandic strain), March (spring, Portuguese strain) and June (summer, domesticated strain (France turbot)). To test the effect of anaerobic muscle activity, 10 fish were on each occasion pre rigor filleted, where one fillet was used as a control, while the other fillet was electrically stimulated using a squared 5 Hz, 10 V pulsed DC for 3 min. All pre rigor fillets were measured for pH, weighed, wrapped in aluminum foil and stored in polystyrene boxes with ice. After 7 days of storage the fillets were measured instrumentally for pH, drip loss, colour (CIE L* a* b*) and texture properties such as hardness and shear force, while fillet shrinkage and colour (RBG) were evaluated with computer imaging on photographs from a standard lightbox. Results showed that softness of the flesh was mainly influenced by factors associated with growth, such as season, photoperiod and maturation. Anaerobic muscle activity simulated with electrical stimulation caused an increase in drip loss (<1%) and loss of shear force (<4%), but had no effect on hardness or fillet shrinkage. Computer imaging revealed that muscle contractions related to the electrical stimulus forced out blood from the fillet causing less reddishness for the entire storage period. We conclude that a pH drop upon slaughter associated with anaerobic muscle activity has a minor effect on the flesh quality in the short run, while seasonal/alternatively genetic effects are predominant.

KW - salmon salmo-salar

KW - halibut hippoglossus-hippoglossus

KW - cod gadus-morhua

KW - scophthalmus-maximus l

KW - atlantic salmon

KW - rainbow-trout

KW - white muscle

KW - oncorhynchus-tshawytscha

KW - rigor-mortis

KW - shelf-life

U2 - 10.1007/s10499-009-9257-3

DO - 10.1007/s10499-009-9257-3

M3 - Article

VL - 18

SP - 461

EP - 474

JO - Aquaculture International

JF - Aquaculture International

SN - 0967-6120

IS - 3

ER -