Turkish Journal of Fisheries and Aquatic Sciences
2011, Vol 11, Num, 1 (Pages: 139-147)
Effects of Clove Oil on Behavior and Flesh Quality of Common Carp (Cyprinus carpio L.) in Comparison with Pre-slaughter CO2 Stunning, Chilling and Asphyxia
Kaveh Rahmanifarah 1 ,Bahareh Shabanpour 1 ,Amir Sattari 1
1 University of Gorgan, Agriculture Sciences and Natural Resources, Departeman of Fishery
DOI :
10.4194/trjfas.2011.0118
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This study evaluates different pre-slaughter stunning methods for common carp (Cyprinus carpio L.) using behavioral
responses and product quality investigations. A total of 32 fish were stunned using CO2, clove oil (CL), hypothermia via
chilling (HY) and asphyxia (AS) in addition to a control group killed by a percussive blow to the head. Behavioral and quality
measurements including pH, rigor mortis and flesh and skin color were used to determine the level of effects on behavior and
quality. The results were indicative of aversive behavior associated to asphyxia, CO2 and a cold shock (chilling). Flesh quality
measurements revealed a rapid pH decline and earlier onset and resolution of rigor mortis in CO2 and asphyxia group
compared to clove oil and chilling groups. Using colorimetric assays of skin, asphyxia and CO2 caused lighter, less red and
yellower color with higher Hue. The asphyxia caused darker, yellower flesh with higher Hue and CO2 caused lighter and
yellower flesh with less reddish than other groups. The lowest flesh color saturation was observed in CO2 group. Regarding to
welfare issue and meat quality the less causative pre-slaughter method of aversive behavior which provides higher product
quality is clove oil stunning.
Keywords :
Behavior; flesh quality; stunning; slaughter; clove oil