01786nas a2200229   4500008004100000245009100041210006900132260001200201300001000213490000700223520106500230653000901295653001701304653001101321653001601332653002301348100001901371700001601390700002101406700001701427856011201444       1997                        eng d00aLife history and spawning migration of the Prespa nase, <i>Chondrostoma prespensis</i>0 aLife history and spawning migration of the Prespa nase iChondros  c1997///  a37-490 v463 aThe Prespa nase, Chondrostoma prespensis, lives exclusively in Lakes Mikri and Megali Prespa in north-western Greece. The Prespa nase fishery catches in both lakes began declining in the early 1980s, probably due to overfishing. However, the population of Lake Mikri Prespa, which has been monitored from 1984 to 1996, has shown an increase since the early 1990s thanks to the use of larger mesh size and a decrease in the fishing effort of the fishery. The population of Lake Mikri Prespa seems unique for the genus because it lives in a lentic ecosystem which is lacking any permanent inflow streams, the Prespa nase being therefore forced to spawn within the lake. In contrast, the population of Lake Megali Prespa do undertake spawning migration into permanent inflows. This migration was studied in 1995 and 1996 in the Agios Germanos stream, starting late April to late May. Only large mature fish visit and spawn in this stream, the migration taking place exclusively at night. Migrating at night may protect them from diurnal predation from waterbirds.10aKAPE10alife history10aPisces10aPrespa nase10aSpawning migration1 aCrivelli, A.J.1 aMalakou, M.1 aCatsadorakis, G.1 aRosecchi, E.  uhttps://icgf.myspecies.info/content/life-history-and-spawning-migration-prespa-nase-chondrostoma-prespensis02441nas a2200253   4500008004100000245011500041210006900156260001200225300001000237490000700247520162800254653001701882653000901899653001701908653001101925653002001936653001801956653001301974100001901987700001602006700002102022700001702043856012702060       1996                        eng d00aThe Prespa barbel, <i>Barbus prespensis</i>, a fish species endemic to the Prespa Lakes (north-western Greece)0 aPrespa barbel iBarbus prespensisi a fish species endemic to the   c1996///  a21-320 v453 aThere are several barbel species in Greece and the taxonomy of some of them is still disputable. In contrast to other countries where barbel can be found exclusively in rivers, there are many barbel populations in Greece living exclusively in lakes. The Prespa barbel, Barbus prespensis, is endemic to the Prespa Lakes, north-western Greece. This study provides the first data on this rare species. Nineteen morphometric parameters and seven meristic features of barbel caught in several lakes and tributaries were compared using discriminant analysis. The host specificity of Dactylogyrus spp. (Monogenea, Plathelminthes) parasitizing the barbel of these lakes was investigated. From 1984 to 1994 the abundance of this barbel remained stable in Lake Mikri Prespa. Some of its life-history traits are presented. The reproductive period seems to start earlier in Lake Mikri Prespa (late April - early June) than in the Lake Megali Prespa system (end of May - mid July). Possible explanations for this difference are discussed. Factors that might potentially threaten the fate of the Prespa barbel population are numerous. They include overfishing, poaching, the introduction of non-native species, water extraction, stream and lakeshore habitat destruction, increasing eutrophication, decreasing water level of Megali Prespa. This year, a new project supported by WWF International started with the goal of producing an Action Plan for the Prespa barbel aimed at better conservation of the species. This plan will focus not only on the species itself, but the entire catchment of the Prespa Lakes will be taken into account.10aconservation10aKAPE10alife history10aPisces10aPlatyhelminthes10aPrespa barbel10ataxonomy1 aCrivelli, A.J.1 aMalakou, M.1 aCatsadorakis, G.1 aRosecchi, E.  uhttps://icgf.myspecies.info/content/prespa-barbel-barbus-prespensis-fish-species-endemic-prespa-lakes-north-western-greece