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Rapid measurements of fat content in live and slaughtered common carp (Cyprinus carpio L.)

  • Carp pond aquaculture, product processing and quality
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Abstract

The objective of this study on common carp (Cyprinus carpio) was to obtain and predict the first cross-validated data of the fat content on market size carps using a non-invasive or non-destructive method in situ. The carps (1680 ± 388 g; n = 136) used were from a semi-intensive system and were on a different diet (cereal, pelleted and extruded diet). For the evaluation of the fat content, a Fish Fatmeter FM 692 from Distell.com. (FFM) and a manual measurement of back fat height using a digital calliper were used. For the prediction model, the following basic body measurements (variables) were used: total body length, body length, body height, the width of the body, and the circuit of the body. The body weight, weight of intestines, weight of gonads, weight of hepatopancreas, and fillet yield (%) were measured, and the Fulton coefficient was calculated. The study was focussed on evaluating the applicability of these methods and the accuracy of the obtained result, respectively. Results showed that all the rapid methods had a strong correlation. Multiple regression models with forward selection of variables were used throughout. The final prediction model between predicted and observed values for the fat content for FFM and calliper being adjusted index of determination is shown here (R 2adj  = 0.88; 5 variables and R 2adj  = 0.91; 7 variables), respectively.

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Acknowledgments

The results were supported of the Ministry of Education, Youth and Sports of the Czech Republic projects “CENAKVA” (No. CZ.1.05/2.1.00/01.0024), “CENAKVA II” (No. LO1205 under the NPU I programme) and Grant Agency of the University of South Bohemia (114/2013/Z).

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Authors and Affiliations

  1. Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Institute of Aquaculture and Protection of Waters, University of South Bohemia in České Budějovice, Na Sádkách 1780, 370 05, České Budějovice, Czech Republic

    Jan Másílko, Tomáš Zajíc, David Hlaváč, Sabine Sampels & Jan Mráz

  2. Institut für Fischerei, Außenstelle für Karpfenteichwirtschaft, Bayerische Landesanstalt für Landwirtschaft, Greiendorfer Weg 8, 913 15, Höchstadt an der Aisch, Germany

    Martin Oberle

Authors
  1. Jan Másílko
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  2. Tomáš Zajíc
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  3. David Hlaváč
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  4. Sabine Sampels
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  5. Jan Mráz
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  6. Martin Oberle
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Corresponding author

Correspondence to Jan Másílko.

Additional information

Guest editors: Zuzana Linhartová and Jan Mráz/Carp pond aquaculture, product processing and quality.

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Másílko, J., Zajíc, T., Hlaváč, D. et al. Rapid measurements of fat content in live and slaughtered common carp (Cyprinus carpio L.). Aquacult Int 24, 1669–1679 (2016). https://doi.org/10.1007/s10499-016-0058-1

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  • DOI: https://doi.org/10.1007/s10499-016-0058-1

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