Environmental cues for natural reproduction of the Chinese sturgeon, Acipenser sinensis Gray, 1835, in the Yangtze River, China
Summary For effective conservation, it is important to explore the environmental cues initiating the spawning activities of a fish species. Based on monitoring data gathered between 1998 and 2011, the relationships between spawning activities of the Chinese sturgeon, Acipenser sinensis, and several...
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Published in | Journal of applied ichthyology Vol. 29; no. 6; pp. 1389 - 1394 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Blackwell Publishing Ltd
01.12.2013
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Subjects | |
Online Access | Get full text |
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Summary: | Summary
For effective conservation, it is important to explore the environmental cues initiating the spawning activities of a fish species. Based on monitoring data gathered between 1998 and 2011, the relationships between spawning activities of the Chinese sturgeon, Acipenser sinensis, and several environmental cues were analyzed using the rare events logistic regression ‘Relogit’ method, which indicated that water temperature, 1‐day ∆‐discharge, and atmospheric pressure were among the key spawning cues for A. sinensis (P < 0.05). It is suggested that Chinese sturgeon might have an optimal environment window of 17–20°C water temperature, high day‐to‐day discharge increase, and low atmospheric pressure for spawning. In support of Chinese sturgeon reproduction, suggested modifications to the operational procedures for the Three Gorges Reservoir (TGR) to trigger spawning are: lowering the downstream water temperature to below 20°C before mid‐October and expanding the period with water temperatures of between 17 and 20°C; to create a day‐to‐day intermittent increase in the discharge to an optimal spawning water temperature; and to regulate flow at nights with a low atmospheric pressure. |
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Bibliography: | China Three Gorges Corporation - No. 0799522 istex:9DC5C809E90488651DA73A0CFEB23F12BBB3F1C7 Natural Science foundation of China - No. NSFC 31201727 ark:/67375/WNG-0MGR2SWR-1 Three Gorges Project eco-environmental monitoring system - No. JJ [2011]-028 ArticleID:JAI12363 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0175-8659 1439-0426 |
DOI: | 10.1111/jai.12363 |