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Compositions of extractive components in the testes and ovaries of various sea urchins: comparisons among species, sexes, and maturational status

  • Yuko MurataEmail author
  • Hirokazu Yoshimura
  • Tatsuya Unuma
Original Article Food Science and Technology

Abstract

We investigated the compositions of free amino acids (FAAs), organic acids (OAs), and nucleotides and their related compounds (NAs) in the gonads of edible sea urchins in Japan. In Hemicentrotus pulcherrimus and Pseudocentrotus depressus, glycine, alanine, lysine, and arginine were abundant FAAs in both sexes before gametogenesis. As gametogenesis proceeded, glycine and threonine showed increasing trends while arginine and histidine showed decreasing trends in both species regardless of sex. Alanine and serine in H. pulcherrimus and isoleucine in P. depressus showed increasing trends regardless of sex. Some other FAAs showed different trends between the sexes. Among the OAs and NAs, adenosine monophosphate, inosine monophosphate, and acetic acid were relatively abundant in H. pulcherrimus testes and ovaries before gametogenesis. In Heliocidaris crassispina, Strongylocentrotus intermedius, and Mesocentrotus nudus, glycine was commonly the most abundant FAA followed by alanine and arginine in the testes and ovaries during early gametogenesis. Compared to the other species, testes and ovaries of Tripneustes gratilla contained lower amounts of arginine and higher amounts of serine and proline. The results of this study could contribute to the development of the aquaculture and seafood industry for sea urchins by accounting for the variation in gonad taste among species, sexes, and according to their maturational status.

Keywords

Gonads Gametogenesis Heliocidaris crassispina Hemicentrotus pulcherrimus Mesocentrotus nudus Pseudocentrotus depressus Strongylocentrotus intermedius Tripneustes gratilla 

Notes

Acknowledgments

We are grateful to Daisaku Masuda at the Nagasaki Prefectural Institute of Fisheries, Shintaro Hirata at the Ishidacho Fisheries Cooperative Association, Tadamitsu Igari at the Kagoshima Prefectural Fisheries Technology and Development Center, and Hiroshi Hoshikawa, Minoru Kimura, and Satoshi Iida at the Hokkaido Research Organization for collecting wild sea urchins. We also thank Atsushi Yukutake at the Fukuoka Prefectural Fish Farming Center for providing us with the juvenile P. depressus, and Akemi Sakaguchi at the National Research Institute of Fisheries Science for technical assistance. Part of this study was conducted as part of the research project, Research and Development Projects for Application in the New Policy of Agriculture, Forestry and Fisheries, funded by the Ministry of Agriculture, Forestry and Fisheries, Japan. The remainder was financially supported by the Japan Fisheries Research and Education Agency.

Supplementary material

12562_2019_1388_MOESM1_ESM.xlsx (67 kb)
Supplementary material 1 (XLSX 66 kb)

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Copyright information

© Japanese Society of Fisheries Science 2019

Authors and Affiliations

  • Yuko Murata
    • 1
    Email author
  • Hirokazu Yoshimura
    • 2
  • Tatsuya Unuma
    • 3
  1. 1.National Research Institute of Fisheries ScienceJapan Fisheries Research and Education AgencyYokohamaJapan
  2. 2.Fukui Prefectural Fisheries Experimental StationObamaJapan
  3. 3.Kushiro Laboratory, Hokkaido National Fisheries Research InstituteJapan Fisheries Research and Education AgencyKushiroJapan

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