THE REPRDDUCTIUN. GROWTH AND DISTRIBUTIDN OF TEGILLARCA GRAIVGSA IN RUSHAN BAY. CHINA

Three reproductive peaks of Zdaracc yrrcvaaaa is reported: they are the beginn-ins of July, the second ten days of July and the first text days of August. The natu-raI growth rate of the spat is 1..3Bmm per month in shell length. Tha growth shell length is proportional to time stxaight line equationL=0.4490+0.038t, and its relative constant x is equal to 0.9837. The distrihutivn of species is within 64m of the seabeach from the low---tida-cone, and occupied of the total amount. There ezsts an a,pparant relation between the distribution of species and thearea, of tidal-Anne. The highest relative cpnstant r is equal to -0.8902, and. it contains65--85% of the grains below 1190μ, the large amount spats of T. gsarrtosx wereobtained Besides, how to incxease the amount of T.granosrc in Rushan is also discussed