Diel densities of young-of-the-year fishes in the River Lee (Hertfordshire) over a 24-hour period in late summer

Murray-Darling Freshwater Research Centre

MDFRC item.

Data on the diel density and dispersal of young-of-the-year (0+) fishes in the River Lee(Hertfordshire) at Holwell Bridge were examined in August 1998 to determine whetherpatterns in this stretch with no fencing along the banks were similar to those observed inAugust 1996 in a nearby, downstream stretch (Woolmer’s Park), where the river is fencedoff. Although the numbers of 0+ fish captured (both overall and for most fish species)was higher at night or dawn, similar to Woolmer’s Park, the differences were notstatistically significant, probably due to low sample number.