Original paper

Pelagic enclosures - modification and use for experimental study of riverine plankton

Thorp, J. H.; Black, A. R.; Jack, J. D.; Casper, A. F.

Large Rivers Vol. 10 No. 1-4 (1996), p. 583 - 589

11 references

published: Sep 18, 1996

DOI: 10.1127/lr/10/1996/583

BibTeX file

ArtNo. ESP142011300040, Price: 29.00 €

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Abstract

To understand better the mechanisms regulating potamoplankton, we developed an experimental in situ technique using drifting pelagic enclosures and successfully tested these "potamocorrals" in the Ohio River (USA). The technique employed 16 cylindrical, nitex mesh bags (83 11m) surrounded by a PVC plastic frame and supponed by a floating platform. The 1.5 m diameter bags enclosed 3500 litres and were submerged 2 m in the water. Potamocorrals were maneuvered when necessary by power boats but allowed to drift downstream for most of the day. Chemical and physical parameters inside and outside the bags did not differ significantly, and the enclosures worked well for studying biological interactions between plankton and both fish and invenebrate planktivores, over multiple 5-day experimental periods.

Keywords

potamoplanktonOhio Riverphysical parametersbiological