Ref ID : 2776
Gene E. Likens and John J. Gilbert; Notes on Quantitative Sampling of Natural populations of Planktonic Rotifers. Limnol.Oceanogr. 15(5):816-820, 1970
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Water samples from Mirror Lake, New Hampshire, were concentrated with a transparent filtering funnel fitted with different-sized mesh screening. The commonly used No.20 (75-µm mesh) plankton netting gave significantly low number of individuals and biased egg ratios for natural populations of planktonic rotifers in the lake.