ASTM E1198-87(2012)

4.1.1 Sample size is more accurately controlled than with nets.

4.1.2 Discrete samples can be more easily obtained both vertically and horizontally.

4.1.3 Multiple or replicate samples can be more easily obtained.

4.1.4 The pumps are adaptable to a variety of ecosystems less than 30-m deep.

4.1.5 Sampling efficiency does not decrease with sample size.

4.2.1 Pumps are bulky and require an electrical source.

4.2.2 Pumps are generally more costly than nets.

4.2.3 Pumps generally discriminate against collecting macroplankton.

4.2.4 Pump intake tubes may be avoided by the more motile zooplankton forms.

4.2.5 Requires a long, bulky, intake tube for deep water sampling.

4.3.1 Some pumps can fragment zooplankton and induce mortality due to their design.

4.3.2 The pump hose must be cleared before taking the next sample.