Diurnal vertical migration patterns of Leptodora kindtii (Focke) (Crustacea: Cladocera) in a shallow eutrophic reservoir.
Diurnal vertical migration patterns of Leptodora kindtii (Focke) (Crustacea: Cladocera) in a shallow eutrophic reservoir.
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DOI：
10.1002/iroh.19690540405
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发表时间：
1969-01-01
期刊：
影响因子：
--
通讯作者：
Cummins, K. W.
中科院分区：
文献类型：
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作者：
Costa, R. R.;Cummins, K. W.
1933年，SEBESTYEN首次提供了金氏细多拉（POCKE）每日垂直迁移模式的定量证据。其他研究人员虽然没有专门参与确定垂直运动的精确模式，但提供了更多的昼夜迁徙记录。（安德鲁斯，1948年;莫尔德扎伊-博尔托夫斯基亚，1956年;霍尔，1959年;切列米索瓦，1960年）。SEBESTYEN（1960）报道称，纤多拉属种群中发生了“明确的昼夜垂直迁移”，但没有详细说明其模式。在为期四年的密集采样（1965-1968年）的圣湖（克劳福德公司，（美国宾夕法尼亚州），在不同深度的Leptodora种群密度中遇到了差异，表明这种食肉动物的垂直迁移模式。Sanctuary湖是一个1，000公顷的水体，是一个高产的富营养化湖泊，形成了一个人工蓄水池的东部手臂状延伸，称为Pymatuning水库。Sanctuary湖的最大深度为3米，但大部分平底盆地的深度为2米或更少。由于这种浅而均匀的形态，在无冰期，物理化学条件相当均匀（Escher-MINS等人，1969).初步调查显示，白天迁移的一般模式是一个在晚上和清晨发现更多的个人在表面上，而较少的人数在上午和下午后，在表面上观察。还观察到较小和较大动物之间的垂直运动差异。
In 1933 SEBESTYEN provided the first quantitative evidence of a daily vertical migration pattern for Leptodora kindtii (POCKE). Other workers, although not specifically involved in determining the precise pattern of vertical movements, have provided further records of diurnal migrations.(ANDREWS, 1948; MORDTTXHAI-BOLTOVSXAIA, 1956; HALL, 1959; CHEREMISOVA, 1960). SEBESTYEN reported (1960) that a “definite diurnal vertical migration” occurred in Leptodora populations, but did not detail the pattern. During an intensive four-year sampling (1965-1968) of Sanctuary Lake (Crawford Co., Pa.), differences were encountered in Leptodora population densities at various depths, demonstrating a vertical migration pattern for this predaceous zooplankter. Sanctuary Lake is a 1,000 hectare body of water which is a highly productive eutrophic lake forming an eastern armlike extension of an artificial impoundment known as Pymatuning Reservoir. Sanctuary Lake has a maximum depth of three meters, but most of the flatbottomed basin is two meters or less. Because of this shallow and rather uniform morphometry, physical-chemical conditions are quite homogeneous during ice-free periods (CUM-MINS et al., 1969).Preliminary investigation showed the general pattern of diurnal migration to be one in which more individuals were found at the surface during the evening and early morning while lesser numbers were observed at the surface after midmorning and in the afternoon. A difference in vertical movements between the smaller and larger animals was also observed.