TY - JOUR
T1 - Pronounced effects of the basal frond portion of the kelp Saccharina japonica on gonad qualities of the sea urchin Mesocentrotus nudus from a barren
AU - Takagi, Satomi
AU - Murata, Yuko
AU - Inomata, Eri
AU - Aoki, Masakazu N.
AU - Agatsuma, Yukio
N1 - Funding Information:
We sincerely thank Dr Y. Sato and D. Saito of Riken Food Co., Ltd and S. Ogami, Operations Chief of the Fudai Fisheries Cooperative Association, for providing S. japonica . We also thank Professor A. Kijima and the staff members of the Onagawa Field Center of Tohoku University for their cooperation in the feeding experiment. We are grateful to Associate Professor T. Yamaguchi and Assistant Professor N. Nakano of Tohoku University for their technical support in the use of the texture analyzer and to Associate Professor K. Takahashi and Assistant Professor K. Nagasawa for their guidance with histological techniques. We also thank M. Oshima and S. Kodama of Diving Stage Ariel, Head of Youth Division Y. Sugawara and other staff of the Shizugawa Branchi of the Miyagi Fisheries Cooperative Association for their cooperation in sea urchin collection. A portion of this study was financially supported by Grant-in-Aid for JSPS Research Fellow [grant number 17J02308 ]. Appendix A
Funding Information:
We sincerely thank Dr Y. Sato and D. Saito of Riken Food Co. Ltd and S. Ogami, Operations Chief of the Fudai Fisheries Cooperative Association, for providing S. japonica. We also thank Professor A. Kijima and the staff members of the Onagawa Field Center of Tohoku University for their cooperation in the feeding experiment. We are grateful to Associate Professor T. Yamaguchi and Assistant Professor N. Nakano of Tohoku University for their technical support in the use of the texture analyzer and to Associate Professor K. Takahashi and Assistant Professor K. Nagasawa for their guidance with histological techniques. We also thank M. Oshima and S. Kodama of Diving Stage Ariel, Head of Youth Division Y. Sugawara and other staff of the Shizugawa Branchi of the Miyagi Fisheries Cooperative Association for their cooperation in sea urchin collection. A portion of this study was financially supported by Grant-in-Aid for JSPS Research Fellow [grant number 17J02308].
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/2/1
Y1 - 2020/2/1
N2 - The gonad quality of sea urchin (Mesocentrotus nudus) adults from a barren can be improved by feeding the animals fronds of the kelp Saccharina japonica from May–July. The improvement in taste is expected to depend on the amino acid composition of the kelp fronds, which varies among the frond portions. We investigated the effects of feeding apical, middle and basal frond portions of S. japonica on gonad size, hardness, color (L*a*b*) and taste (free amino acids) of M. nudus from a barren from May–July in a rearing experiment in which we analyzed the protein and total and free amino acid content of each frond portion. Feeding of each frond portion improved gonad size, hardness, color and taste. Feeding of the basal portion, which contained high levels of glutamic acid, alanine, and proline, markedly increased the alanine and glutamic acid content and decreased the content of bitter-tasting amino acids in gonads, implying greatly enhanced sweet and umami taste. Based on a comparison of alanine content with that reported in past studies of M. nudus, the gonad taste would be evaluated at a higher level. The basal portion of S. japonica fronds has the high potential to improve gonad taste.
AB - The gonad quality of sea urchin (Mesocentrotus nudus) adults from a barren can be improved by feeding the animals fronds of the kelp Saccharina japonica from May–July. The improvement in taste is expected to depend on the amino acid composition of the kelp fronds, which varies among the frond portions. We investigated the effects of feeding apical, middle and basal frond portions of S. japonica on gonad size, hardness, color (L*a*b*) and taste (free amino acids) of M. nudus from a barren from May–July in a rearing experiment in which we analyzed the protein and total and free amino acid content of each frond portion. Feeding of each frond portion improved gonad size, hardness, color and taste. Feeding of the basal portion, which contained high levels of glutamic acid, alanine, and proline, markedly increased the alanine and glutamic acid content and decreased the content of bitter-tasting amino acids in gonads, implying greatly enhanced sweet and umami taste. Based on a comparison of alanine content with that reported in past studies of M. nudus, the gonad taste would be evaluated at a higher level. The basal portion of S. japonica fronds has the high potential to improve gonad taste.
KW - Frond portion
KW - Gonad taste
KW - Mesocentrotus nudus
KW - Saccharina japonica
KW - Total and free amino acid
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U2 - 10.1016/j.aquaculture.2019.734623
DO - 10.1016/j.aquaculture.2019.734623
M3 - Article
AN - SCOPUS:85075333120
VL - 516
JO - Aquaculture
JF - Aquaculture
SN - 0044-8486
M1 - 734623
ER -