New Zealand Journal of Marine and Freshwater Research abstracts
Sampling and preservation methods for the quantitative enumeration of microzooplankton
MARK R.JAMES
Taupo Research Laboratory
DSIR Marine and Freshwater
Department of Scientific and Industrial Research
P. O. Box 415, Taupo, New Zealand
Abstract
Four sampling and four preservation techniques were compared for the quantitative enumeration of microzooplankton (ciliates, rotifers, and nauplii) in a eutrophic lake and in an oligotrophic lake. Counts of most microzooplankton groups were significantly higher in samples preserved with Lugol's iodine and mercuric chloride than with formalin and glutaraldehyde. The collection of samples with nets or pumps, and the concentration of samples with nylon screens gave significantly lower counts than discrete settled samples. All ciliates < 50
\m in length passed through a 20
\m mesh screen showing that size fractionation by screen or net is not an effective way of partitioning planktonic organisms.
Keywords ciliates; rotifers; microzooplankton; preservatives; quantitative enumeration; sampling methods
New Zealand Journal of Marine and Freshwater Research, 1991, Vol. 25: 305-310 0028-8330/2503-0305 $2.50/0 © Crown copyright 1991
Received 20 December 1990; accepted 2 7 June 1991
PDF file of entire paper: medium quality (498K); (scanned from paper original: notes about this process)
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