Orientador(es)
Resumo(s)
A repulsive effect, that some induced primary stimuli, like sound and light, is known to be
provoked in fish behavior. In the present study, two strobe light frequencies, 350 flashes/minute and
600 flashes/minute, were tested in laboratorial conditions, using three native freshwater fish species
of northern Portugal: Brown trout (Salmo trutta), Northern straight-mouth nase (Pseudochondrostoma
duriense) and Iberian barbel (Luciobarbus bocagei). The results showed a differential repulsive behavior
of the fish species to light stimulus, and particularly to a frequency of 600 flashes/minute. S. trutta
presented the most repulsive behavior, whereas the L. bocagei showed less repulsion to the light
stimulus. No relevant differences were found between pre-test and post-assessments, confirming a
rapid recovery of natural fish behavior after the deterrent effect. The results highlighted the potential
of behavioral barriers, particularly in salmonid streams, based on strobe light stimulus.
Descrição
Palavras-chave
Behavioral barriers Brown trout Deterrent effect Endemic cyprinids Underwater light
Contexto Educativo
Citação
Jesus, Joaquim; Teixeira, Amílcar; Natário, Silvestre; Cortes, Rui (2019). Repulsive effect of stroboscopic light barriers on native salmonid (Salmo trutta) and cyprinid (Pseudochondrostoma duriense and Luciobarbus bocagei) species of iberia. Sustainability. ISSN 2071-1050. 11, p. 1-11