Discovering salmonids with Remote Underwater Video (RUV) technology, a winter pilot study in a Small Alpine Stream

Discovering salmonids with Remote Underwater Video (RUV) technology, a winter pilot study in a Small Alpine Stream | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL This is a preprint and has not been peer reviewed. Data may be preliminary. 20 January 2026 V1 Latest version Share on Discovering salmonids with Remote Underwater Video (RUV) technology, a winter pilot study in a Small Alpine Stream Authors : Paolo Cappa 0009-0002-1365-5666 [email protected] , Marie Lorber , and Marco Arese Authors Info & Affiliations https://doi.org/10.22541/au.176892160.03696487/v1 114 views 65 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Freshwater ecosystems are currently facing a biodiversity crisis. The decline in freshwater fish populations, particularly in alpine streams, is exacerbated by environmental changes such as climate change, habitat fragmentation, and human activities. In this context, monitoring freshwater fish populations is complex, especially in winter conditions with snow cover when traditional methods, such as electrofishing, become difficult. This pilot study explores the use of remote underwater video (RUV) systems for monitoring salmonids in winter conditions in the Torrente Vallanta, an alpine stream in North-West Italy. By using 28 deployments and a total effort of 8.97 hours, our results demonstrate that RUV technology is effective for detecting the presence of salmonids, estimating the size and observing their behaviour in remote streams. The detectability of salmonids varied across different segments of the stream and RUV technology provided valuable insights into winter fish behaviour, such as limited movement and the search for hideouts. This study sets the foundation for future research on fish assemblages in poorly studied streams in the Alps, providing an important tool for conservation efforts in the context of the freshwater biodiversity crisis. Supplementary Material File (main document.docx) Download 8.74 MB Information & Authors Information Version history V1 Version 1 20 January 2026 Copyright This work is licensed under a Non Exclusive No Reuse License. Keywords ecological experiment ecosystem freshwater method development population ecology vertebrate Authors Affiliations Paolo Cappa 0009-0002-1365-5666 [email protected] Southern Cross University National Marine Science Centre View all articles by this author Marie Lorber Independent Researcher, Blagnac, 31700, France View all articles by this author Marco Arese Independent Researcher, Cherasco, 12062, Italy View all articles by this author Metrics & Citations Metrics Article Usage 114 views 65 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Paolo Cappa, Marie Lorber, Marco Arese. Discovering salmonids with Remote Underwater Video (RUV) technology, a winter pilot study in a Small Alpine Stream. Authorea . 20 January 2026. DOI: https://doi.org/10.22541/au.176892160.03696487/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. For more information or tips please see 'Downloading to a citation manager' in the Help menu . Format Please select one from the list RIS (ProCite, Reference Manager) EndNote BibTex Medlars RefWorks Direct import Tips for downloading citations document.getElementById('citMgrHelpLink').addEventListener('click', function() { popupHelp(this.href); return false; }); $(".js__slcInclude").on("change", function(e){ if ($(this).val() == 'refworks') $('#direct').prop("checked", false); $('#direct').prop("disabled", ($(this).val() == 'refworks')); }); View Options View options PDF View PDF Figures Tables Media Share Share Share article link Copy Link Copied! Copying failed. 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