Population regulation in a changing environment: Long-term changes in growth, condition and survival of sprat, Sprattus sprattus L. in the Bristol Channel, UK

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• 作者：Peter A. Henderson^a ; ^{peter@pisces-conservation.com} ; & Rowena C. Henderson^b
• 关键词：Sprat growth ; Population dynamics ; Long-term sampling ; NAOI ; Power station monitoring ; Salinity ; Seasonal variation ; Water temperature ; Density-dependence
• 刊名：Journal of Sea Research
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：120
• 期：Complete
• 页码：24-34
• 全文大小：1295 K
• 卷排序：120

文摘

Sprat, Sprattus sprattus, is the dominant pelagic species within the Bristol Channel. Using a 36-year monthly time series sprat growth is shown to have declined almost linearly over the last 36 years. Longevity has declined, with large age 3 + sprat > 140 mm standard length lost to the population by 1999. Adult condition, has shown a rapid decline from 13.7 g in 2007 to 9 g in 2011. Bulmer’s test indicates density-dependent regulation is operating. Sprat recruitment is responding to the sunspot cycle, the North Atlantic Oscillation and sea water temperature.