35-Year Studies of Reproduction in Marine Invertebrates and the Influence of Climatic Factors on it

35-Year Studies of Reproduction in Marine Invertebrates and the Influence of Climatic Factors on it

The studies of fouling of pioneer artificial substrates, conducted for the past 35 years near the coast of Primorsky Territory, Sea of Japan, Russia, have revealed an asynchronism in reproduction of invertebrates. Juveniles of Japanese scallop Patinopecten yessoensis and other widely distributed bivalves of boreal origin (Mytilus trossulus and Hiatella arctica) were, as a rule, abundant (over 250 scallops per a square meter of artificial substrate) in the odd-numbered years from 1977 to 1985. This is related mainly to the duration of ice season in previous winter, amount of precipitation, surface water salinity, and wind speed in June.