20.500.12556/RUL-171511 Threats assessment of the endemic idle crayfish (Austropotamobius bihariensis Pârvulescu, 2019) lessons from long- term monitoring The idle crayfish (Austropotamobius bihariensis Pârvulescu, 2019), endemic to Romania's Apuseni Mountains, urgently requires a specific conservation plan. Due to its recent description, conservation efforts have been limited, highlighting the need for immediate and practical recommendations to ensure its protection. Over 13 years, field observations were conducted to evaluate population trends and identify threats following IUCN standards. Additionally, geospatial assessments and predictive modelling were employed to estimate both the optimal habitat and current population size under three distinct scenarios. The primary threats identified include poor forest management, extreme drought, anthropogenic development and riverbed alterations, all contributing to declines in crayfish abundance. The most severe impacts arise when these pressures converge at a single site, compounded by a chronic, low-virulence crayfish plague infection (A-haplogroup). The total population is estimated at 31,150 (± 449.9 SE) individuals, with 1,163,754 m$^2$ of suitable habitat, of which only 37.9% lies within 13 protected areas under the most realistic scenario. Poor water quality was found to significantly reduce the modelled population size. In light of these findings, we propose a series of targeted conservation actions tailored for each protected area and highlight the importance of extending measures beyond their current boundaries. Additionally, we recommend implementing the ‘ark sites’ concept in regions with optimal ecological conditions, stable populations and genetic diversity, to reduce pressures and safeguard the species through effective field management. crayfish Austropotamobius bihariensis Pârvulescu species conservation data science ark site extinction geodiversity data habitat assessment pressures assessment protected areas species conservation plan distribution modelling raki Austropotamobius bihariensis Pârvulescu ogrožene vrste ohranjanje vrst zaščita podatkovne vede true false true Angleški jezik Slovenski jezik Članek v reviji 2025-08-27 13:41:55 2025-08-27 13:41:56 2025-09-04 03:59:42 0000-00-00 00:00:00 2025 0 0 13 str. iss. 1, art. e70033 Vol. 35 Jan. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 595.3:502.172 1052-7613 10.1002/aqc.70033 224493315 RAZ_Acs_Andrei-Robert_2025.pdf RAZ_Acs_Andrei-Robert_2025.pdf 1 BB15E1B700BB716B49C6A25654915FEE ac73197bce721c4695edc650b34c5266b42ac5f32d1f15ff6c5ed286f2e0ea80 35f41780-833b-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=214864 https://onlinelibrary.wiley.com/doi/10.1002/aqc.70033 1 b586b1d9-833a-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=214863 Fakulteta za računalništvo in informatiko 0 0 0