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Romanichthys Valsanicola Is Still Fighting! How Can We Help?

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Romanichthys Valsanicola Is Still Fighting! How Can We Help? NORTH-WESTERN JOURNAL OF ZOOLOGY 7 (2): 334-338 ©NwjZ, Oradea, Romania, 2011 Article No.: 111211 www.herp-or.uv.ro/nwjz Romanichthys valsanicola is still fighting! How can we help? Ilie C. TELCEAN*, Alfred Ş. CICORT-LUCACIU, Istvan SAS and Severus D. COVACIU-MARCOV University of Oradea, Faculty of Sciences, Department of Biology; 1, Universităţii, Oradea 410087, Romania *Corresponding author, I. Telcean, E-mail: [email protected] Received: 24. May 2011 / Accepted: 07. August 2011 / Available online: 27.August 2011 Abstract. A subadult individual of Romanichthys valsanicola was identified in May 2011 in Vâlsan River, Brădetu locality. Its discovery confirms the species’ survival, despite the extremely high anthropogenic pressure. The current threats upon the sculpin perch in comparison with the previous situation are taken into discussion, and solutions that should assure its survival are proposed. Key words: Romanichthys valsanicola, Vâlsan River, anthropogenic impact, protection, biodiversity. The Carpathian basin holds a distinct biodiversity, in Vâlsan, where it is also found in a strong de- having a special past and evolution during the gla- cline, strengthen by the anthropogenic pressure, cial periods (see in: Bodnariuc et al. 2002, Ken- being on the brink of extinction (Perrin et al. 1993). yeres et al. 2009, Varga 2010). However, despite From a zoogeographic perspective, it is considered the presence of several protected areas, the region that the actual distribution range represents the has been strongly affected by man in the past, last fragments of an initially larger area, at least clear-cuts being massive in some areas of the Ro- with respect to the genus (Bănărescu 1998). From a manian Carpathians (Rozylowicz et al. 2011). Al- conservative point of view, it is very important though biodiversity is in global decline (see in: that R. valsanicola was the centre of a wide protec- Butchart et al 2010. Cogălniceanu & Cogălniceanu tion program, following which the evolution of 2010), a serious situation is registered in the case the sculpin perch seems to have improved (Bă- of freshwater environments (see in: Dudgeon et al. nărescu & Vasiliu-Oromulu 2004a,b). However, 2006, Suski & Cooke 2007, Turak & Linke 2011). the situation of the species has not yet been clari- The situation also seems valid in Romania, despite fied, the last accessible scientific data regarding its the fact that in freshwater environments there are observation dating from the year 2005 (Ionaşcu & species with a high conservation value. From Crăciun 2009). There are recent studies upon the these, the most distinct of all is the sculpin perch, ihtiofauna of Argeş basin in which the species has Romanichthys valsanicola. not been signalled (Ureche et al. 2007). Thus, the R. valsanicola is the most endangered fish spe- survival of R. valsanicola in the region has been cies from Romania (Bănărescu 1994), being en- questioned by some local factors, which could demic in the hydrographic basin of Argeş River have serious repercussions upon the protected (Bănărescu 2005). According to the Romanian leg- area and its whole biodiversity. As a consequence, islation, the sculpin perch is a species of national assuring the survival of the species is of great im- interest (OUG 57/2007). The species was relatively portance for the entire protected area established recently described (Dumitrescu et al. 1957), it has a at the level of the hydrographic basin of Vâlsan great age and survived in the region in the glacial River. The protection of this species has become a periods, multiple glacial refuges existing at the main objective for the caretaker of the protected level of the Carpathians (Schmitt 2009). The spe- area, immediately after receiving custody in 2010. cies’ distribution range during the described pe- In order to solve the problem of the species’ riod also included, together with Argeş River, two survival, a field trip was organised between 10 tributaries, Râul Doamnei and Vâlsan, occupying and 14 May 2011. In spring 2011 it was cold, snow a length of 21 km in the latter (Bănărescu et al. spots remaining in the higher areas during the in- 2005). Dams were afterwards built on Argeş and terval. Rain modified the turbidity and the flow of Vâlsan, which, combined with other factors, led to Vâlsan, despite the presence of the dam. The fishes the decline of the species and it was declared ex- were captured using electronarcosis with the help tinct from all three rivers (Stănescu 1971). Pres- of a portable electrofisher, model Samus - 725MP, ently, it seems that R. valsanicola has survived only which allows to set several parameters of the elec- Romanichthys valsanicola is still fighting! 335 tric impulses and does not harm the fishes. After habitat of the species (Bănărescu 1964). Other fish having determined and photographed the cap- species captured alongside the sculpin perch are: tured fishes, we released them at the collecting Barbus petenyi, Leuciscus cephalus, Alburnoides points. bipunctatus from the Cyprinidae and Sabanejewia We captured a R. valsanicola (Fig. 1) individual romanica, belonging to the Cobitidae family. In the in Brădetu locality, on 12th May 2011. The individ- past, two species of cyprinid fish were signalled in ual was a subadult, which is important because it the sectors inhabited by the sculpin perch, namely represents proof that the species is reproducing in Gobio uranoscopus and Chondrostoma nasus, which Vâlsan River and the resulted individuals survive. were found in competition with the first one This fact increases the chances of survival of the (Stănescu 1971). We have not encountered these species. The aspect of the riverbed from the stud- species, which probably withdrew to the inferior ied sector, with numerous large rocks (Fig. 2a), sector of the river, due to the flow modifications of corresponds with the one described as a typical Vâlsan. Figure 1. Individual of Romanichthys valsanicola from Brădetu locality. a.) b.) Figure 2. The aspect of the riverbed from the studied sector (a) and riverbed even at 50 m downstream, completely lacking in rocks (b). 336 Telcean, I.C. et al. R. valsanicola is probably not limited as distri- which had catastrophic consequences, being con- bution to the area from which it was captured by sidered as having the most serious effects upon us, but it seems that its present distribution range the life conditions from Vâlsan (Bănărescu & Va- is reduced and fragmented. The fragmentation is siliu-Oromulu 2004a). A new threat is represented firstly due to the modification of the riverbed mor- by the modification of the shores. The action oc- phology by the locals that collected rocks for con- curs in several places upstream of Muşăteşti, af- struction. This activity has been known from the fecting both the water speed and the aspect of the past (Bănărescu et al. 1995), representing a serious riverbed and its substratum. The extraction of danger to this species, which is less mobile (Io- rocks from the riverbed modifies the aspect of the naşcu & Crăciun 2009). The riverbed is extremely river in many places, the sectors without rocks be- modified even at 50 m downstream from the area ing unfavourable for the species, which mostly lies populated by the sculpin perch, almost completely hidden under them (Ionaşcu & Crăciun 2009). Un- lacking in rocks (Fig. 2b). Despite the fragmenta- fortunately, the rocks that have been transported tion, small sectors favourable to the species can in the riverbed in the past (Bănărescu & Vasiliu- still be found in the area in which the species was Oromulu 2004a) have been already collected by recorded in the past. R. valsanicola is probably pre- locals from many places. sent in the short segment from upstream of Most of the territory initially occupied by R. Brădetu, where it had been previously observed valsanicola in Vâlsan is presently completely in- (Perrin et al. 1993). We did not manage to identify cluded in localities. Their impact is high, in many it there, probably due to the high flow and turbid- cases the houses reaching the vicinity of the water. ity of the water resulted from the rains. The pressure of localities is manifested through The first author of the paper took part in the water pollution, shore modification and elimina- European project that aimed to assure the survival tion of their vegetation. The shores that were once of the sculpin perch in Vâlsan, having the possibil- covered with orchards are now occupied by ity to compare the current situation with the one households or even industrial objectives. from approximately 10 years ago. Probably the R. valsanicola is still fighting the threats to only change that advantaged the species in the which it is subjected, being present further on in past years has been the reduction of the pollution Vâlsan River. Despite its reduced territory and the originated from the sanatorium from Brădetu, fol- increasing anthropogenic impact, the sculpin lowing the realising of a sewerage system, as it perch persists in surviving and even occupying af- was recommended in the past (Bănărescu et al. fected sectors, situated inside the localities. More- 1995). On the other hand, the anthropogenic pres- over, it seems that the population is still capable of sure upon the sculpin perch has strongly increased reproducing. However, R. valsanicola cannot fight in the past 8 years. R. valsanicola is presently sub- on its own for a long time; vigorous measures jected to some organised anthropogenic activities must be implemented in order to save it. The fish performed at a large scale and also to the individ- species from the localities are also threatened in ual pressure of the locals, which, if accumulated, other cases (Duncan et al. 2010), the situation be- can be as important as the previous one. The dan- ing even more difficult in a poor area, where the gers that threaten the species are the ones previ- local pressure upon the natural resources is in- ously known (e.g.: Stănescu 1971, Bănărescu & Va- creased by a growing population.
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