Acoustic cameras, a non-invasive approach to monitor whitefish phenology in lakes - Archive ouverte HAL
Poster De Conférence Année : 2024

Acoustic cameras, a non-invasive approach to monitor whitefish phenology in lakes

Résumé

Climate change impacts the phenology of the reproduction of fish population due to increasing water temperature. Whitefish (Coregonus spp.) spawn in very shallow waters in peri-alpine lakes when surface water temperature reaches 7-8°C, typically in late December and early January. Monitoring spawning phenology traditionally relies on gillnets, but their invasive nature and difficulty of implementation, especially during winter when unfavorable weather conditions occur, pose challenges. While visual observations and environmental DNA have been proposed, their limitations in terms of observer bias and sampling frequencies are not satisfactory. This study analyses the phenology of whitefish reproduction in the shallow zone of Lake of Geneva over three seasons using an acoustic camera ARIS (Sound Metrics Corp). A proxy of fish presence over the period enables a comprehensive depiction of the phenological patterns, even if improvements on automatic size classification is still needed. Furthermore, the semi-automated process using Sonar5-pro facilitates rapid data analysis, enabling a high frequency description of the reproduction rhythms on long time series. Acoustic cameras provide a non-intrusive alternative for monitoring whitefish reproduction phenology.
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Dates et versions

hal-04684542 , version 1 (02-09-2024)

Identifiants

  • HAL Id : hal-04684542 , version 1

Citer

Hervé Rogissart, Clément Rautureau, Franck Cattanéo, Victor Frossard, Chloé Goulon, et al.. Acoustic cameras, a non-invasive approach to monitor whitefish phenology in lakes. ICES. Working Group of Fisheries Acoustics, Science and Technology (WGFAST), Apr 2024, Plouzané, France. , 2024. ⟨hal-04684542⟩
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