Abstract
Horizontal migration of the Japanese king-crab was studied by digesting the record of tagging experiment performed by H. MARUKAWA (Journal of the Imperial Fisheries Experimental Station, Tokyo, (4), 1933). The method of treatment adopted in the present paper is as follows: -
For the tagged crabs liberated in the northern, central and southern parts of the sea off the west coast of Kamchatka, the regional percentage distribution of recaptures was calculated separately in each successive season, i.e., the season of liberation (I), the next season (II), and so on. And the migration was inferred from the difference of the distribution in a season from that in the preceeding season, as shown in Figure 1.
