A population of the Japanese scallop, Mizuhopecten yessoensis, found in the open area of Peter the Great Bay (Sea of Japan), which was not protected against southeastern summer monsoons, has been studied. Specimens of different ages, from 1 year old to 11 years old, were found in the population. According to a provisional estimation, the total reserve of the Japanese scallop in the population reached 30 000 specimens. After strong typhoons, up to 6 000 specimens were stranded along the shoreline. Even after repeatedly occurring typhoons observed during one particular summer season, the population of M. yessoensis remained rather stable, although its age structure demonstrated both uneven annual recruitment in the population and different survival rates in different generations. Specimens of the highly productive generation of 1999 constituted the bulk of the bottom population and coastal wreckage. At older ages, the probability for the Japanese scallop to be stranded during a storm decreases significantly.
Russian Journal of Marine Biology – Springer Journals
Published: Sep 1, 2005
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