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Improved Flesh Pigmentation of Rainbow Trout (Oncorhynchus mykiss) by Feeding Z-Isomer-Rich Astaxanthin Derived from Natural Origin.
Osawa, Yukiko; Nishi, Ryuta; Kuwahara, Daichi; Haga, Yutaka; Honda, Masaki.
Affiliation
  • Osawa Y; Biotechnology R&D Group, ENEOS Corporation.
  • Nishi R; Department of Marine Biosciences, Tokyo University of Marine Science and Technology.
  • Kuwahara D; Biotechnology R&D Group, ENEOS Corporation.
  • Haga Y; Department of Marine Biosciences, Tokyo University of Marine Science and Technology.
  • Honda M; Faculty of Science & Technology, Meijo University.
J Oleo Sci ; 73(1): 35-43, 2024.
Article in En | MEDLINE | ID: mdl-38171729
ABSTRACT
The use of Paracoccus carotinifaciens-derived natural astaxanthin as an alternative to synthetic astaxanthin has attracted considerable attention from the aquaculture industry. Furthermore, to enhance the bioavailability of astaxanthin, its "Z-isomerization" has been actively studied in recent years. This study investigated the effects of feeding a diet containing astaxanthin rich in the all-E- or Z-isomers derived from P. carotinifaciens on the pigmentation and astaxanthin concentration in rainbow trout (Oncorhynchus mykiss) flesh. Z-Isomer-rich astaxanthin was prepared from the P. carotinifaciens-derived all-E-isomer by thermal treatment in fish oil, and the prepared all-E-isomer-rich astaxanthin diet (E-AST-D; total Z-isomerratio = 9.1%) and Z-isomer-rich astaxanthin diet (Z-AST-D; total Z-isomer ratio of astaxanthin = 56.6%) were fed to rainbow trout for 8 weeks. The feeding of Z-AST-D resulted in greater pigmentation and astaxanthin accumulation efficiency in the flesh than those fed E-AST-D. Specifically, when E-AST-D was fed to rainbow trout, the SalmoFan score and astaxanthin concentration of the flesh were 22.1±1.4 and 1.36±0.71 µg/g wet weight, respectively, whereas when Z-AST-D was fed, their values were 26.0±2.5 and 5.33±1.82 µg/g wet weight, respectively. These results suggest that P. carotinifaciens-derived astaxanthin Z- isomers prepared by thermal isomerization are more bioavailable to rainbow trout than the all-E-isomer.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Oncorhynchus mykiss Limits: Animals Language: En Journal: J Oleo Sci Journal subject: BIOQUIMICA Year: 2024 Document type: Article Country of publication: Japón

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Oncorhynchus mykiss Limits: Animals Language: En Journal: J Oleo Sci Journal subject: BIOQUIMICA Year: 2024 Document type: Article Country of publication: Japón