The Eel Monitoring Programme (EMP) at Inland Fisheries Ireland uses fyke net surveys to assess yellow eel populations in lakes, main channel rivers, canals, transitional waters and lagoons. For further information on the methodology used in the surveys please contact IFI, methodology includes the use of chains of 5 nets, along with repeating historical surveys with chains of 10 nets. This dataset contains data including year of sampling, waterbody name and type, catchment name and river basin district (RBD). The Erne catchment is monitored as part of the North West International River Basin District (NWIRBD) as an eel management unit under Irelands Eel Management Plan in collaboration with agencies in Northern Ireland.Catch data on yellow eels for surveys are presented, including, numbers of eels captured/measured and summarised length and weight results for summer fyke netting European Eel surveys (yellow eel life stage) along with length frequency breakdowns of catches. NetNights are calculated by multiplying the number of nets set by the number of night that the nets were allowed to fish. An interactive map of this dataset can be found here: European Eel Fyke Net AppField AliasField NameField TypeField DescriptionSpeciesdescSpeciesTextSpecies NameSpecies CodecdSpeciesTextSpecies CodeRBDindRbdTextRiver Basin District NameYearyearNumberYear of SamplingCatchmentcatchmentNameTextCatchment NameWaterbodywaterbodyNameTextWaterbody NameWaterbody TypeindListwaterbodyTypeTextWaterbody TypeSample_idwaterbodySampleCodeTextSample ID for SamplingNo. EelscntEelsNumberCount of Eels CapturedSampling NightscntSamplingNightsNumberNumber of Nights nets were deployed forNo. Nets NightcntNetsNightNumberNumber of Nets deployed per nightNo. Measured EelscntEelsMeasuredNumberNumber of Eel measured out of total catchTotal weight (kg)mtMassTotalKgNumberTotal weight of catch (kg)Mean length (cm)avgLengthTotalCmNumberAverage length of catch (cm)Min. length (cm)minLengthTotalCmNumberMinimum length of catch (cm)Max. length (cm)maxLengthTotalCmNumberMaximum length of catch (cm)Mean weight (kg)avgMassKgNumberAverage weight of catch (kg)Min. weight (kg)minMassKgNumberMinimum weight of catch (kg)Max. weight (kg)maxMassKgNumberMaximum weight of catch (kg)5-9 cmcalcLengthClass5-9CmNumberFrequency of Eels in 5-9 cm length class10-19 cmcalcLengthClass10-19CmNumberFrequency of Eels in 10-19 cm length class20-29 cmcalcLengthClass20-29CmNumberFrequency of Eels in 20-29 cm length class30-39 cmcalcLengthClass30-39CmNumberFrequency of Eels in 30-39 cm length class40-49 cmcalcLengthClass40-49CmNumberFrequency of Eels in 40-49 cm length class50-59 cmcalcLengthClass50-59CmNumberFrequency of Eels in 50-59 cm length class60-69 cmcalcLengthClass60-69CmNumberFrequency of Eels in 60-69 cm length class70-79 cmcalcLengthClass70-79CmNumberFrequency of Eels in 70-79 cm length class>80 cmcalcLengthClass>80CmNumberFrequency of Eels in >80 cm length class