1. On the releasing of the cultured seeds of sea urchin, Strongylocentrotus intermedius (A. Agassiz), at Shikabe in the coast of Funka Bay. I. Discrimination between releasing group and aboriginal group by rings formed in genital plate;Agatsuma;Hokusuishi Geppo,1987
2. Ecological studies on the population dynamics of the sea urchin Strongylocentrotus nudus;Agatsuma;Scientific Reports of the Hokkaido Fisheries Experimental Station,1997
3. Effect of the covering behavior of the juvenile sea urchin Strongylocentrotus intermedius on predation by the spider crab Pugettia quadridens;Agatsuma;Fisheries Science,2001
4. Chapter 21 Ecology of Strongylocentrotus nudus