𝔖 Bobbio Scriptorium
✦   LIBER   ✦

A comparison of net and pump sampling methods in the study of Chironomid larval drift

✍ Scribed by C. J. Williams

Book ID
104613909
Publisher
Springer
Year
1985
Tongue
English
Weight
517 KB
Volume
124
Category
Article
ISSN
1573-5141

No coin nor oath required. For personal study only.

✦ Synopsis

200 p m and 50 p m mesh aperture nets were compared with respect t o the sampling of the drift of Chironomidae (Diptera) larvae.

200 p m mesh drift nets were found t o be unsatisfactory for the sampling of chironomid larval drift; such nets seriously underestimated drift density of larvae and distorted the sub-family and instar composition of samples.

200 p m mesh drift nets captured larval drift in densities of 1-24 m-3, while pumped samples, filtered through 50 p m mesh aerial nets, indicated densities of 10-1 600 m-'. Drift nets also underestimated ephemeropteran drift density.

The use of pumps, with 50 p m o r smaller mesh aperture aerial nets, is recommended for quantitative and qualitative sampling of chironomid drift, and possibly that of other invertebrates.

πŸ“œ SIMILAR VOLUMES

A Quantitative Comparison of Two Zooplan
A Quantitative Comparison of Two Zooplankton Sampling Methods, a Plankton Trap and a Towed Net, in the Baltic
✍ Paula Kankaala πŸ“‚ Article πŸ“… 1984 πŸ› John Wiley and Sons 🌐 English βš– 629 KB

A coniparison between a large plankt,on trap with a capacity of 33 litres and a modern towecl net was made in the course of zooplankton production studies in the Balt,ic. On the average, the net efficiency was 75 U#, of that, of the trap. Both methods were equally efficient in catching naapliar stag