Long-Term Changes in the Seasonal and Interannual Dynamics of the Abundance of Eggs of Common Pelagophilic Fish Species in the Gdansk Deep of the Baltic Sea

IF 0.5 4区生物学 Q4 MARINE & FRESHWATER BIOLOGY

Russian Journal of Marine Biology Pub Date : 2024-04-15 DOI:10.1134/s1063074024010036

E. M. Karaseva, E. E. Ezhova

引用次数: 0

Abstract

The abundance of eggs of the Baltic cod Gadus morhua Linnaeus, 1758 and the Baltic sprat Sprattus sprattus (Linnaeus, 1758) in the Gdansk Deep of the Baltic Sea was estimated from data for March–August 2015–2022. The estimates were compared with historical data for 1968–1977. In the modern period, the average sprat egg abundance increased one and a half times from 134.7 to 192.6 eggs/m² and the spawning peak shifted to earlier dates, from May–July 1968–1977 to April–June 2015–2022. The average cod egg abundance decreased by half from 16.3 to 8.0 eggs/m² and the spawning shifted to 1 month later, from May–June to June–July, which is apparently related to climate change.

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波罗的海格但斯克深海常见嗜水性鱼类鱼卵丰度的季节性和年际动态长期变化

摘要根据 2015 年 3 月至 2022 年 8 月的数据，估算了波罗的海格但斯克深海中波罗的海鳕鱼 Gadus morhua Linnaeus, 1758 和波罗的海鲱 Sprattus sprattus (Linnaeus, 1758) 的卵丰度。估算结果与 1968-1977 年的历史数据进行了比较。在现代时期，鲱鱼卵的平均丰度从 134.7 枚/平方米增加到 192.6 枚/平方米，增加了 1.5 倍，产卵高峰期也从 1968-1977 年的 5-7 月提前到 2015-2022 年的 4-6 月。鳕鱼平均卵量从 16.3 枚/平方米减少到 8.0 枚/平方米，减少了一半，产卵期推迟了 1 个月，从 5 月-6 月推迟到 6 月-7 月，这显然与气候变化有关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Russian Journal of Marine Biology 生物-海洋与淡水生物学

CiteScore

1.00

自引率

0.00%

发文量

审稿时长

6-12 weeks

期刊介绍： The Russian Journal of Marine Biology was founded in 1975 by Alexey V. Zhirmunsky, member of the Russian Academy of Sciences. The Russian Journal of Marine Biology covers a wide range of research and some applied aspects of marine biology as a synthetic science related to various fields of study on marine biota and environment. It presents fundamental research on biological processes at molecular, cellular, organismal, and populational levels in marine organisms. Consideration is given to marine objects as models in life sciences. The journal also publishes papers dedicated to events in Russian and international marine biological science and the history of biology.