1. The ecology of a sea urchin Strongylocentrotus intermedius (A. Agassiz) on the coast of Okhotsk Sea in Hokkaido;Abe;Sci Rep Hokkaido Fish Exp Stn,1994
2. On the releasing of the cultured seeds of sea urchin, Strongylocentrotus intermedius (A. Agassiz), at Shikabe in the coast of Funka Bay. Discrimination between releasing group and aboriginal group by rings formed in genital plate;Agatsuma;Hokusuishi Geppo,1987
3. Strongylocentrotus intermedius (A. Agassiz);Agatsuma,1991
4. Ecological studies on the population dynamics of the sea urchin Strongylocentrotus nudus;Agatsuma;Sci Rep Hokkaido Fish Exp Stn,1997
5. Marine afforestaion off the Japan Sea coast in Hokkaido;Agatsuma,1999