In recent years in oceans and rivers, there has been an increase in human activity that has changed
the sound landscape of the aquatic environment. Studies are focused on investigating the effects
of these agents on underwater animal life, expanded knowledge for terrestrial animals, mammals
and more recently for fish of salt and fresh water. Both in fish and other vertebrates, there are
studies that focus on vocalization, but there is still little research that investigates the physical and
behavioral effects in fish and little is known about the effects in neotropical fish, which motivates
the expansion of the underwater acoustic area in the investigation of its effects on the Brazilian
ichthyofauna. Our proposal was to evaluate the physiological responses to stress induced by
young fish in the laboratory, using blood parameters such as cortisol and glucose levels found in
the moments after the standard handling with a step without experimental control and others with
noise sounds with a characteristic frequency of 1kHz, using a JBS speaker via bluetooth connected
to an Android phone (Sumsung J2). The fish were isolated first for two hours later for another
hour, which allowed us the same handling for everyone and the physiological response obtained
in the created condition, together with the blood extract. It was observed the stress generated in
the short exposure to continuous and alternate noise, using the species Pseudoplatystoma
corruscans, in the tests with 10 minutes of continuous exposure to sound exposure and 30 min
with alternating sounds in two and three minutes of exposure. Both showed increased glucose (P
= 0.014), indicating stress on species, but cortisol was not significant for these treatments.
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