Generation Abundance Dynamics of Peled at the Lower Reaches of the Ob’ River in 1981–2021

IF 1 4区环境科学与生态学 Q4 ECOLOGY

Russian Journal of Ecology Pub Date : 2024-04-09 DOI:10.1134/s1067413624010028

V. D. Bogdanov, I. A. Kshnyasev, I. P. Melnichenko, A. R. Koporikov, O. A. Goskova, Ya. A. Kizhevatov

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Abstract

The generation abundance of peled has been assessed at the lower reaches of the Ob’ River. Based on data on the number of larvae migrated downstream from spawning grounds, obtained in 1981–2021 on the main spawning rivers, current population structure of peled at the lower reaches of the Ob’ River is described, the influence of anthropogenic factors and of the water content of the Ob’ River floodplain on peled reproduction is analyzed. The Severnaya Sos’va River definitely plays a decisive role in the reproduction of peled. In recent years, there has been an increase in the contribution of the Voikar and Sob’ rivers. Seven-year cycles have been identified (between the peaks in the larvae number); their maximums coincide with the peaks of water content at the lower reaches of the Ob’ River with a 1-year lag, which supports the world’s largest river peled population abundance. The presence of such cycles makes it possible to predict phases of high fish abundance. An equation describing the dependence of the generation size of peled at the lower reaches of the Ob’ River on the average water level of Ob’ River in June–August at the Salekhard gauging level in the previous year is proposed.

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1981-2021 年鄂毕河下游裴莱德鱼的世代丰度动态

摘要对鄂毕河下游鹈鹕的世代丰度进行了评估。根据1981-2021年在主要产卵河流上获得的从产卵场向下游迁移的幼虫数量数据，描述了 "鄂毕河 "下游鹈鹕的当前种群结构，分析了人为因素和 "鄂毕河 "洪泛区含水量对鹈鹕繁殖的影响。塞韦纳亚-索斯瓦河对鹈鹕的繁殖起着决定性作用。近年来，沃伊卡尔河和索布河的贡献有所增加。已确定的七年周期（幼虫数量峰值之间）；其最大值与鄂毕河下游的含水量峰值相吻合，滞后一年，这为世界上最大的鹈鹕种群数量提供了支持。这种周期的存在使得预测鱼类高丰度阶段成为可能。我们提出了一个方程式，描述了鄂毕河下游鹈鹕的生成量与鄂毕河前一年 6-8 月在萨列哈尔德测量水位处的平均水位之间的关系。

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 Ecology 环境科学-生态学

CiteScore

1.50

自引率

18.20%

发文量

审稿时长

6 months

期刊介绍： The Russian Journal of Ecology publishes completed original studies in all branches of theoretical and experimental ecology, reviews, articles on topics currently in debate, and information on new methods of research.