Dietary effect of the red alga Porphyra yezoensis on growth of Strongylocentrotus intermedius (Echinoidea: Echinodermata) and Haliotis discus hannai (Gastropoda: Mollusca) juveniles

Fri Inomata, Toshiyuki Matsui, Yukio Agatsuma

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The red alga Porphyra yezoensis, which is cultivated in Japan, contains a high concentration of protein. This study examined the dietary effects of P yezoensis versus the kelps Saccharinajaponica and Saccharina ochotensis on the growth of juvenile sea urchins (Strongylocentrotus intermedius) and abalones (Haliotis discus hannai). Urchins fed P. yezoensis had significantly higher food conversion efficiency (42.0%) and digestibility (94.9%) compared to urchins fed S. japonica. For abalone, the conversion efficiency of P yezoensis was 14.0%. No significant differences in growth rates were detected between the urchins and abalones fed P yezoensis and kelp. These results suggest that the high concentration of protein in P yezoensis contributed to the high food conversion efficiencies ofjuvenile sea urchins and abalones and the high digestibility found in sea urchins. However, it is likely that the thin thalli of P yezoensis made them difficult to graze efficiently. If this alga is consolidated, it would resolve these problems.

Original languageEnglish
Pages (from-to)697-702
Number of pages6
JournalCahiers de Biologie Marine
Volume54
Issue number4
Publication statusPublished - 2013 Nov 29

Keywords

  • Food conversion
  • Gonad production
  • Growth
  • Haliotis discus hannai
  • Porphyra yezoensis
  • Strongylocentrotus intermedius

ASJC Scopus subject areas

  • Aquatic Science

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