Déterminisme ante mortem et variabilité de la qualité nutritionnelle, technologique et organoleptique (couleur et morphologie) de la perche commune perca fluviatilis (L.) :

Abstract : The purpose of these experimental studies was to assess the variability of quality in farmed and wild Eurasian perch (Perca fluviatilis) and its determinism. Quality is divided into three components: organoleptical (morphology and color), technological (filleting yield, morpho-anatomical index) and nutritional (total lipids content and fatty acids composition in fillet). The quality of perch shows variability according to the geographic origin, season and rearing systems. Farmed perch differ from wild counterparts by technological and nutritional components: perivisceral fat content and n-6 poly-unsaturated fatty acids (PUFA) increase with the intensification level of farmed system, whereas n-3 PUFA decrease. Thus, there is not only one perch quality but rather many perch qualities. Consequently, hypothesis have been formulated about factors responsible for the variability of quality and then tested. Two populations of wild perch from different geographic origin were reared in laboratory from eggs stage, in the same environmental and trophic conditions. The results show that only nutritional component displays differences between the two populations. Thus, phenotypical expression of the quality is under control of both origin (genotype) and environmental factors. Among these factors, 4 factors with 2 modalities were tested in 8 experimental units using a fractional factorial design: dietary lipids origin, feeding rate, density and domestication. Domestication and dietary lipids origin (simple factor or interaction) were found as the main factors of the determinism of perch quality
Complete list of metadatas

https://hal.univ-lorraine.fr/tel-01752500
Contributor : Thèses Ul <>
Submitted on : Thursday, March 29, 2018 - 1:49:44 PM
Last modification on : Tuesday, April 10, 2018 - 1:31:26 AM

File

2005_MAIRESSE_G.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : tel-01752500, version 1

Citation

Guillaume Mairesse. Déterminisme ante mortem et variabilité de la qualité nutritionnelle, technologique et organoleptique (couleur et morphologie) de la perche commune perca fluviatilis (L.) :. Autre. Institut National Polytechnique de Lorraine, 2005. Français. ⟨NNT : 2005INPL115N⟩. ⟨tel-01752500⟩

Share

Metrics

Record views

38

Files downloads

26