{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,8]],"date-time":"2026-03-08T13:26:53Z","timestamp":1772976413612,"version":"3.50.1"},"posted":{"date-parts":[[2026]]},"group-title":"SSRN","reference-count":63,"publisher":"Elsevier BV","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"abstract":"<jats:p>Flow fluctuations caused by flexible hydropower production alter habitat structure and availability, with consequences for river biodiversity. Understanding how small-bodied fish respond to flow variability at the microhabitat scale remains limited, as microhabitat use is commonly described from point observations of depth, velocity, substrate, and cover. However, fish perceive fine-scale hydrodynamic changes through pressure and velocity gradients detected by the lateral line system. This study tested whether pressure-derived variables, measured with an artificial lateral line (ALL), could discriminate among microhabitat-use categories (sustained presence, avoidance and transition) defined from fish detections and relocation distances. Fish detections and pressure measurements were collected downstream of a small hydropower plant following pulsed-flow events. Over five days, 133 PIT-tagged leuciscids (Pseudochondrostoma duriense and Squalius carolitertii) were tracked within a 150 m reach. ALL measurements were conducted at locations with fish detections and with rare or no detections. Three ALL-derived variables were evaluated: front pressure, front pressure fluctuations, and pressure asymmetry. Pressure asymmetry and front pressure emerged as the most informative predictors. Both modelling approaches indicated substantial hydrodynamic overlap between sustained presence and avoidance. When transition was included, sustained presence occupied a more constrained hydrodynamic region characterised by lower pressure asymmetry and higher front pressure, whereas movement-related use extended into a broader region of the predictor space. These results suggest that ALL-derived pressure variables can provide a complementary fish-flow perspective on fine-scale hydrodynamic changes and may support habitat assessment and enhancement in highly dynamic rivers affected by flexible hydropower production.<\/jats:p>","DOI":"10.2139\/ssrn.6367886","type":"posted-content","created":{"date-parts":[[2026,3,7]],"date-time":"2026-03-07T23:37:41Z","timestamp":1772926661000},"source":"Crossref","is-referenced-by-count":0,"title":["Hydrodynamic signals of fish microhabitat use in a hydropower-regulated river assessed with an artificial lateral line"],"prefix":"10.2139","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6395-6868","authenticated-orcid":true,"given":"Maria Jo\u00e3o","family":"Costa","sequence":"first","affiliation":[]},{"given":"Francisco","family":"Godinho","sequence":"additional","affiliation":[]},{"given":"Filipe","family":"Rom\u00e3o","sequence":"additional","affiliation":[]},{"given":"Juan  Francisco","family":"Fuentes-P\u00e9rez","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0832-7334","authenticated-orcid":true,"given":"Jeffrey  Andrew","family":"Tuhtan","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6005-3751","authenticated-orcid":true,"given":"Isabel","family":"Boavida","sequence":"additional","affiliation":[]}],"member":"78","reference":[{"key":"ref1","doi-asserted-by":"crossref","first-page":"790","DOI":"10.1577\/1548-8675(1993)013<0790:SHTTFA>2.3.CO;2","article-title":"Stream Habitat Types: Their Fish Assemblages and Relationship to Flow","volume":"13","author":"L References Aadland","year":"1993","journal-title":"N. 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