HERE - Inland Fisheries Ireland

The Central and Regional Fisheries Boards1.3.2 Fish abundanceFish abundance was calculated as the mean number of fish caught per metre of net, i.e. mean CPUE.Fish biomass was calculated as the mean weight of fish caught per metre of net, i.e. mean BPUE. Asummary of CPUE and BPUE data for each species and gear type is shown in Table 1.2.Table 1.2. Mean CPUE (mean number of fish per m of net) and mean BPUE (mean weight offish per m of net) for all fish species recorded on Templehouse Lake, October 2008Gear typeBrowntroutRoach Perch Bream Pike Rudd RuddxRoach RoachxBream EelMean CPUE (mean number of fish/m of net)Gill nets 0.003 0.563 0.197 0.007 0.030 0.007 0.030 0.057 -Fyke nets 0 0.006 0.006 0 0 0 0 0 0.033Mean BPUE (mean weight (g) of fish/m of net)Gill nets 0.090 40.350 9.474 2.710 17.597 2.993 10.912 15.508 -Fyke nets 0 0.111 0 0 0 0 0 0 10.894* In the rare occasion where biomass data was unavailable for an individual fish, this was determined from a length/weight regression forthat species1.3.3 Length frequency distributionsRoach ranged in length from 4.5cm to 31.6cm (mean = 14.7cm) (Fig. 1.2). Perch had recorded lengthsfrom 5.2cm to 29.0cm (mean = 16.0cm) (Fig. 1.3). Roach x bream hybrids ranged in length from15.5cm to 32.5cm. A small number of rudd x roach hybrids were also recorded, with lengths rangingfrom 15.2cm to 33.3cm. Eels ranged in length from 43.2cm to 62.2cm. Nine pike were captured,ranging in length from 38.0cm to 48.8cm.Roach4035BenthicFyke3025No.fish201510501 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32Length (cm)Fig. 1.2. Length frequency of roach captured on Templehouse Lake, October 20085