Abstract
SOME thirty-two years ago, G. Denil, at that time chief engineer of Belgian Public Works, stood by a new weir, 3·5 m. in height, and lacking a fishpass of any kind whatever. As he watched the tail water of the dam, he was struck by the frantic and necessarily unsuccessful efforts of many salmon to surpass this obstacle by leaps, and also their wholesale destruction following exhaustion, by their overcrowding in a restricted channel, and at the hands of fishermen who had no difficulty in capturing their helpless prey.
La mécanique du poisson de rivière
Qualités nautiques du poisson; ses méthodes locomotrices, ses capacités; ses limites; résistances du fluide; effet de la vitesse, de la pente; résistance de seuil. Par G. Denil. Pp. 395. (Bruxelles:Goemaere, Imprimeure du Roi, 1938.) n.p.
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NEMENYI, P. Fish Movements and Fishpasses. Nature 144, 567–569 (1939). https://doi.org/10.1038/144567a0
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DOI: https://doi.org/10.1038/144567a0
