Abstract

In northern Primorsky Krai, males of the Siberian lumpsucker Eumicrotremus asperrimus (Tanaka, 1912) with much reduced or missing bony tubercles occur almost all along the coastline. The lack or significant reduction of bony tubercles in males is a secondary sexual characteristic of this species indicating that such males can participate in breeding. Three main stages are distinguished in the breeding cycle of males of E. asperrimus: occupation of a spawning substrate, spawning proper, and guarding of eggs. In waters off northern Primorsky Krai, E. asperrimus spawn in the shelf zone during spring and fall, with a peak in spring. The most favorable depths for spawning are from 60 to 100 m. The fish use abandoned shells of large gastropods as the spawning substrate. Clutches of fertilized eggs are guarded by males.

中文翻译：

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日本海北部滨海边疆区沿海西伯利亚白头翁Eumicrotremus asperrimus（1912年，田中）的成年雄性分布及其繁殖说明

摘要

在滨海边疆区北部，西伯利亚肥大的Eumicrotremus asperrimus（塔纳卡，1912年）的雄性几乎全部沿着海岸线出现，其骨结节减少或缺失。雄性骨结节的缺乏或明显减少是该物种的次要性特征，表明此类雄性可参与繁殖。曲霉雄性虾的繁殖周期分为三个主要阶段：占领产卵基质，适当产卵和保护卵。在滨海边疆区北部的水域中，E。asperrimus在春季和秋季期间在架子区域产卵，春季出现高峰。产卵的最有利深度是60至100 m。鱼使用废弃的大型腹足动物贝壳作为产卵基质。受精卵的离合器由雄性保护。