Abstract—

The paper presents characteristics of the species composition, spatial distribution, and trophic interactions of ichthyoplankton and zooplankton in the spring–summer period 2017 dependent on intensity of the warming-up of the upper sea layer against the background of transition in a system of the surface currents from the winter-to summer-type of the circulation. In April–May, successful spawning of temperate-water fish species was prolonged due to low values of the sea surface temperature (8–9°С) on the shelf of Crimean Peninsula between Kerch Strait and the cape Sarych. The maximum abundance of Sprattus sprattus eggs was 162.8 egg/m² and larvae –116 ind/m². Warm-water species occurred only in the western sector from Herakleian Peninsula to the Cape Tarkhankut, where the water temperature was at its maximum and peaked at 14–15°С. In June–July the delayed summer hydrological season hampered the warming-up of the upper quasi-homogenous layer, which thickness varied from 1–5 to 10–15 m. Notwithstanding the large number of species in the ichthyoplankton, maximum abundance did not exceed 50 egg/m² and 14 ind/m² for larvae. The proportion of larvae of temperate-water fish species averaged 32% and reached 40% in deep water areas. Juvenile stages of copepods of the cold-water complex were dominant in the larval fish diet both in the spring and summer seasons.

中文翻译：

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2017年春季至夏季，浮游鱼类的分布与克里米亚海岸（黑海）外水文状况的相关性

摘要—

本文介绍了2017年春夏季浮游鱼类和浮游动物的种类组成，空间分布和营养相互作用的特征，这取决于地表系统过渡背景下上层海域变暖的强度从冬季到夏季的循环流。在4月至5月，由于在刻赤海峡和萨雷奇角之间的克里米亚半岛架子上的海面温度较低（8–9°С），延长了温带水鱼类的成功产卵期。鲱鱼卵的最大丰度为162.8卵/ m ²和幼虫–116 ind / m ² 。暖水物种仅出现在从伊拉克利翁半岛到塔尔汉库特角的西部地区，那里的水温最高，并达到14-15°С的峰值。6月至7月，延迟的夏季水文季节阻碍了上部准均质层的升温，其厚度从1-5到10-15 m不等。尽管鱼鳞浮游生物中种类繁多，但幼虫的最大丰度不超过50个卵/ m ²和14 ind / m ²。温水鱼类的幼体比例平均为32％，深水区达到40％。在春季和夏季，幼水鱼的饵料中冷水complex足类的幼年期占主导地位。