{"id":12199,"date":"2026-09-28T11:00:58","date_gmt":"2026-09-28T11:00:58","guid":{"rendered":"https:\/\/ofero.news\/?p=12199"},"modified":"2026-09-28T11:00:58","modified_gmt":"2026-09-28T11:00:58","slug":"survival-threat-persists-for-europes-rarest-freshwater-fish-with-most-detected-along-tiny-romanian-river-stretch","status":"publish","type":"post","link":"https:\/\/ofero.news\/?p=12199","title":{"rendered":"Survival threat persists for Europe\u2019s rarest freshwater fish, with most detected along tiny Romanian river stretch"},"content":{"rendered":"

Researchers identified 150 asprete<\/em> fish in Romania\u2019s V\u00e2lsan River during annual scientific monitoring conducted from September 22 to 25, down from 181 specimens in 2025. Of this year\u2019s total, 114 fish (or 76%), were found along a single 450-meter stretch representing less than 5% of the approximately 10 km in which the species was detected.<\/p>\n

The asprete (Romanichthys valsanicola)<\/em>, Europe\u2019s rarest freshwater fish, survives only in the V\u00e2lsan River in Romania\u2019s Arge\u0219 county and nowhere else in the world. The 2026 survey found the species at nine of the 21 monitoring stations examined by researchers from the Centura Verde\/Green Belt Foundation\u2019s <\/em> Aspretele Tr\u0103ie\u0219te\/Asprete Lives conservation programme and its partners.<\/p>\n

According to the foundation, the core population is trapped between a concrete barrier upstream that the fish cannot cross and the Br\u0103detu wastewater treatment plant downstream. The plant allegedly operates outside the required parameters and chronically pollutes the river, creating what conservationists describe as a chemical barrier that restricts fish movement and affects survival downstream.<\/p>\n

Pollution of the V\u00e2lsan River caused by the Br\u0103detu wastewater treatment plant, August 30, 2026. Credit: Green Belt Foundation<\/p>\n

The monitoring figures showed that the number of specimens identified in the 450 m core area remained virtually unchanged, at 114 this year compared with 113 in 2025. Downstream from the treatment plant, however, the number fell from 68 to 36, accounting for almost the entire year-on-year decline.<\/p>\n

\u201cThe figures now clearly show the connection between the distribution of the asprete<\/em> and the continued poisoning of the V\u00e2lsan River by the treatment plant, which has failed to operate within the required parameters for many years,\u201d conservationist Alex G\u0103van, president of the Green Belt Foundation and founder of the Asprete Lives programme, said.<\/p>\n

He also called on the Romanian state to ensure the ecological flow required to maintain the river ecosystem downstream from the V\u00e2lsan dam and the Dobroneagu water intake.<\/p>\n

\u201cWithout the ecological flow calculated by the National Institute of Hydrology and Water Management, the asprete<\/em> has no chance,\u201d Alex G\u0103van stated. \u201cWe have a fish that is unique in the world, while the river and the community of the V\u00e2lsan Valley need healing. Beyond preserving a species and an extremely valuable ecosystem, we are talking about an urgent public health issue.\u201d<\/p>\n

The asprete<\/em> requires fast-flowing, well-oxygenated water. Lower flows reduce the available habitat and the dilution of wastewater, while warm, dry conditions cause the remaining water to heat more rapidly and retain less oxygen.<\/p>\n

Asprete photographed in the V\u00e2lsan River on September 23, 2026. Credit: Alex G\u0103van\/Green Belt Foundation<\/p>\n

The foundation said the ecological flow is frequently not maintained downstream from the dam and water intake. Plus, the absence of sewerage systems in the Br\u0103dule\u021b and Mu\u0219\u0103te\u0219ti communes adds further pressure on the river.<\/p>\n

Because most identified specimens are concentrated in such a short section, conservationists warn that a single severe pollution incident, flood, or extended period of low flow could threaten the species with extinction.<\/p>\n

\u201cFor the asprete<\/em>, together with the people of the V\u00e2lsan Valley, the authorities and our partners, the choice is simple: either we save it now, or we lose it forever,\u201d Alex G\u0103van said.<\/p>\n

The foundation is working to remove three artificial barriers in the Br\u0103detu area, including the concrete structure preventing the fish from moving upstream. The project, carried out through the Open Rivers programme, would reconnect approximately 12.8 km of river habitat.<\/p>\n

Meanwhile, nearly EUR 500,000 was allocated through Romania\u2019s 2026 state budget to restore the Br\u0103detu treatment plant to the required operating standards following discussions between the foundation and public authorities.<\/p>\n

Another proposed measure concerns the mandatory ecological flow. Values calculated in 2024 by the National Institute of Hydrology and Water Management, through a study commissioned by the foundation, could be incorporated into the water-management permits for the V\u00e2lsan dam and Dobroneagu intake.<\/p>\n

In another move, on September 22, the foundation also submitted a five-year conservation project for funding under the European Union\u2019s LIFE programme. The LIFE ASPRETE proposal is backed by Romania\u2019s Environment Ministry and the Presidential Administration\u2019s Climate and Sustainability Department.<\/p>\n

If approved by the European Commission, the project would involve the University of Natural Resources and Life Sciences in Vienna, the Hungarian University of Agriculture and Life Sciences, and the Dutch Sensing Clues foundation, alongside scientific advisers from France, Germany, and Romania.<\/p>\n

The project would combine annual monitoring with habitat restoration, controlled restocking, and the preparation of a national action plan for the species. It also proposes the creation of an Asprete Sanctuary for research and captive breeding, intended as permanent conservation infrastructure.<\/p>\n

The sanctuary would be built on approximately 1.5 hectares in the village of Gale\u0219u, Br\u0103dule\u021b commune, within the V\u00e2lsan Valley Natura 2000 site. The Green Belt Foundation has acquired the land for this purpose.<\/p>\n

“If Romania loses the asprete<\/em>, the entire world loses the <\/em> asprete. We are talking about a species that exists almost entirely between two points on the map just a few minutes\u2019 walk apart. That is why what happens along 450 meters of river in a village in Arge\u0219 is not a local issue. It is a responsibility Romania has toward the entire planet, and the outcome is being decided now, not ten years from now,” Alex G\u0103van told Romania-insider.com.<\/p>\n

https:\/\/www.youtube.com\/watch?v=mFXHJ5L9pWo<\/a><\/p>\n

Discovered in 1956, the asprete<\/em> is endemic to Romania and classified as critically endangered<\/a> on the International Union for Conservation of Nature\u2019s Red List. It historically inhabited the Arge\u0219 River and R\u00e2ul Doamnei as well, but now survives only in the V\u00e2lsan, within an area protected by the Natura 2000 network and the V\u00e2lsan Valley Nature Reserve.<\/p>\n

Before the Asprete Lives programme was launched in 2019, official Environment Ministry data estimated the remaining population at only 10 to 15 specimens. Incidental surveys identified 12 fish in 2020 and ten in 2021.<\/p>\n

Then, standardized annual monitoring across 21 stations began in 2022. Researchers identified 57 specimens that year, 153 in 2023, 97 in 2024<\/a>, 181 in 2025, and 150 in 2026.<\/p>\n

The species\u2019 documented range covered approximately 16 km between Br\u0103detu and V\u00e2ls\u0103ne\u0219ti from 2022 to 2024. It was detected across only around 9.5 km in 2025, while this year\u2019s survey extended the known range by approximately 600 meters downstream, although it remains well below the earlier 16 km area.<\/p>\n

The 2026 monitoring was conducted by 12 researchers: Mircea M\u0103rginean and R\u0103zvan Andrei Pop of Fauna & Flora; Andrei Togor and Marcus Drimbea of Aqua Crisius; Nagy Andr\u00e1s Attila and Szil\u00e1gyi B\u00e1lint of Babe\u0219-Bolyai University; Ilie Telcean of the University of Oradea; and C\u0103lin La\u021biu, Alex Uiuiu, George Muntean, Tudor P\u0103puc, and Raul Savin of the Applied Ichthyology Laboratory at the University of Agricultural Sciences and Veterinary Medicine in Cluj-Napoca. Fauna & Flora country director Iain Trewby and Green Belt Foundation representatives Adrian D\u0103sc\u0103lescu and Nicoleta Dobrotchi also participated.<\/p>\n

Asprete monitoring field team in Mu\u0219\u0103te\u0219ti, Arge\u0219 county, on September 23, 2026. Credit: Green Belt Foundation<\/p>\n

The Green Belt Foundation, formerly the Alex G\u0103van Foundation, has run the Asprete Lives programme since 2019.<\/p>","protected":false},"excerpt":{"rendered":"

Researchers identified 150 asprete fish in Romania\u2019s V\u00e2lsan River during annual scientific monitoring conducted from September 22 to 25, down from 181 specimens in 2025. Of this year\u2019s total, 114 fish (or 76%), were found along a single 450-meter stretch representing less than 5% of the approximately 10 km in which the species was detected. […]<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-12199","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/ofero.news\/index.php?rest_route=\/wp\/v2\/posts\/12199","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ofero.news\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ofero.news\/index.php?rest_route=\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/ofero.news\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=12199"}],"version-history":[{"count":0,"href":"https:\/\/ofero.news\/index.php?rest_route=\/wp\/v2\/posts\/12199\/revisions"}],"wp:attachment":[{"href":"https:\/\/ofero.news\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=12199"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ofero.news\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=12199"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ofero.news\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=12199"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}