A trial for observing with scanning sonar fish behavior toward set net

agentes nocivos alimentos animal animal aquatique animales animals aquatic animals aquatic organisms behaviour bruit comportamiento comportement contaminantes equipment equipo equipo de pesca facteur nuisible fish detection fishes fishing gear fishing nets fishing operations fisica fisiologia fonction physiologique foods injurious factors instrument instrumentos instruments mouvement movement movimiento noise organisme aquatique peces physics physiological functions physiologie physiology physique polluant pollutants produit alimentaire redes de pesca ruido son (acoustique) sonido sound ultrason ultrasonics ultrasonido vertebrados vertebrates vertebre