Abstract

The effects of oceanic and biotopic factors on the size and age at maturity of sea urchins Strongylocentrotus intermedius alongside the northwestern coast of Primorsky krai are discussed. The growth rate and body size of the sea urchin at 50% maturity of the population corresponds to 30–35 mm in clusters with high growth rates and to 20–22 mm in clusters with low growth rates. In populations inhabiting southern areas of northern Primorsky krai, S. intermedius reaches final maturity at 40–45 mm, while in areas further to the north, at 26–30 and 31–35 mm. The age at final maturity in areas between Ezhovaya Bight and Cape Khitrovo and along Cape Nadezhdy was 4+ to 5+, while in other areas it was 3+. We argue that the differences in sizes and time periods in which maturity is reached in various S. intermedius populations depend on the local environment within the studied coastal area, primarily, on the abundance of available food, rather than on latitudinal zoning.

中文翻译：

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日本海西北海岸海胆Strongylocentrotus intermedius的成熟度大小和年龄

摘要

讨论了海洋和生物因子对滨海边疆区中部海胆Strongylocentrotus intermedius和西北沿海的大小和年龄的影响。人口成熟度为50％时，海胆的生长速度和体型对应于高生长率集群中的30–35 mm，而低生长率集群中则为20–22 mm。在人口居住在北部滨海边疆区的南部地区，S.中间型在40-45毫米处达到最终成熟度，而在更北部的区域则在26-30和31-35毫米处达到最终成熟度。Ezhovaya Bight和Cape Khitrovo之间以及Nadezhdy角之间的地区的最终成熟年龄为4+至5+，而其他地区则为3+。我们认为，不同中间链球菌种群达到成熟的大小和时间段的差异取决于所研究沿海地区的当地环境，主要取决于可用食物的丰富程度，而不取决于纬度分区。