𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Invertebrate Sampling in the Substratum of an Experimental Recirculating Stream

✍ Scribed by J. Stewart Welton; Michael Ladle; Jon A. B. Bass; Kevin Chapman


Publisher
John Wiley and Sons
Year
1981
Tongue
English
Weight
565 KB
Volume
66
Category
Article
ISSN
1434-2944

No coin nor oath required. For personal study only.

✦ Synopsis


Abstract

In order to determine the efficacy of sampling benthic invertebrates to a depth of 100 mm as compared with 200 mm, the gravel substratum of an experimental recirculating stream was sampled to both depths. Except for 6 taxa which were significantly more numerous in the shallower samplers, there was no significant difference between the densities determined from the two depths.


πŸ“œ SIMILAR VOLUMES


An analysis of changes in the invertebra
✍ Brent Cowie πŸ“‚ Article πŸ“… 1985 πŸ› Springer 🌐 English βš– 807 KB

Changes in benthic community structure at four sites along a flood-prone montane stream continuum in the South Island of New Zealand were analysed using rank correlation (Kendall's Tau and Spearman's r 5 ) and a community similarity index (S c) developed initially for stream pollution assessment . S

Influence of Fish Farming on the Spatial
✍ Angelisa Fabrizi; Enzo Goretti; Arthur Compin; RΓ©gis CΓ©rΓ©ghino πŸ“‚ Article πŸ“… 2010 πŸ› John Wiley and Sons 🌐 English βš– 826 KB

## Abstract In applied river ecology it is implicitly assumed that community structure is a surrogate for functional properties. To test this hypothesis, 26 sites were sampled for macroinvertebrates in a Central Italian stream system impacted by 13 trout farms (1 upstream and 1 downstream site per

False-negative findings in chorionic vil
✍ Ingo Kennerknecht; Gotthold Barbi; Mahmoud Djalali; Karl Mehnert; Michael Schnei πŸ“‚ Article πŸ“… 1998 πŸ› John Wiley and Sons 🌐 English βš– 152 KB πŸ‘ 2 views

61 fetuses/newborns who had an aberrant karyotype in amniocentesis (AC) or percutaneous umbilical blood sampling (PUBS) were followed-up by chorionic villus sampling (CVS) at birth or after interruption.The overall rate of discrepancies is surprisingly high. Among 46 cases with a non-mosaic numerica