Abstract
The aim of our study was to evaluate the effects of implanted dummy acoustic transmitters in the tainha Mugil liza. Three treatments (replicated at a density of 6 fish/tank) were tested for their effects on fish survival (S), maintenance of vital rates (mass), physiological response to surgery (i.e., plasma levels of the stress hormone cortisol and hemoglobin concentration) and tag retention during 30 days of experiment: (1) Control treatment; (2) Sham control treatment; and (3) Tagged treatment. Only one fish from Sham control treatment died, and one tag was expelled through the incision in Tagged treatment. Growth rate parameters (i.e., absolute growth rate, condition factor, and weight) increased over the 30 days’ experiment in all treatments. Our results indicate that surgical implantation of transmitters into the peritoneal cavity is a viable option for acoustic telemetry studies of tainhas.
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