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首页> 外文期刊>Journal of Freshwater Ecology >Seasonal Changes, Life Cycle, and Production of a Psychrophilic Chironomid (Propsilocerus akamusi) in a Chinese Lak
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Seasonal Changes, Life Cycle, and Production of a Psychrophilic Chironomid (Propsilocerus akamusi) in a Chinese Lak

机译:中国百姓的嗜冷性拟南芥(Propsilocerus akamusi)的季节性变化,生命周期和生产

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摘要

Seasonal changes, life cycle, and production of a psychrophilic Chironomidae species, Propsilocerus akamusi (Tokunage), were studied in eutrophic Lake Donghu. The P. akamusi population was characterized by a single annual reproduction period during late November to December, and the larval growth mainly occurred in winter. Most of P. akamusi were univoltine, while some of them came to emergence in two years or more. The average density and biomass were 318.9 ind./m super(2) and 0.57 g dry weight /m super(2) during January 1998 to June 2000, respectively, but these values did not include any summer measurements since the larvae aestivated in the deep sediment layer and could not be sampled routinely in summer. The annual production of P. akamusi was 2.73g dry weight/m super(2), and the corresponding production/biomass ratio was 4.60.
机译:在富营养化的东湖中研究了嗜冷的拟蝇科(Propsilocerus akamusi)(Tokunage)的季节性变化,生命周期和产量。 akamusi种群的特征是在11月下旬到12月之间有一个单一的年度繁殖期,幼虫的生长主要发生在冬季。 akamusi的大多数是单电压的,而其中一些是在两年或更长时间内出现的。在1998年1月至2000年6月,平均密度和生物量分别为318.9 ind./m super(2)和0.57 g干重/ m super(2),但是这些值不包括任何夏季测量值,因为在该区域幼虫被吸食了。沉积层较深,夏季无法常规取样。赤松假单胞菌的年产量为2.73g干重/ m super(2),相应的产量/生物量比为4.60。

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