Opercular beat: A non-invasive and rapid method to detect stress in seahorses

Freret-Meurer, Natalie Villar; Carmo, Tatiane Fernández do; Cabiró, Gabriela

doi:10.1080/10454438.2020.1810841

Cited by 4 publications

(3 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…VR is another stress indicator in fish that is sensitive to a wide range of stimuli of different intensities and it is typically a variable that increases during stress responses [4,50,[54][55][56]68,69]. The tilapia in the present study started with similar baseline VR levels and, after handling, the animals in all conditions (vehicle, FLX1 and FLX10 groups) showed hyperventilation.…”

Section: Discussionsupporting

confidence: 48%

“…VR is an easy, inexpensive, sensible and meaningful tool for the evaluation of the effects of acute stressors in fishes [4,[54][55][56]. In this study, VR was measured by quantifying the time required for 10 opercular beats or mouth movements to occur.…”

Section: Ventilation Rate (Vr)mentioning

confidence: 99%

“…In this study, VR was measured by quantifying the time required for 10 opercular beats or mouth movements to occur. This measurement was performed visually through a small hole in an opaque curtain to decrease the visual VR is an easy, inexpensive, sensible and meaningful tool for the evaluation of the effects of acute stressors in fishes [4,[54][55][56]. In this study, VR was measured by quantifying the time required for 10 opercular beats or mouth movements to occur.…”

Section: Ventilation Rate (Vr)mentioning

confidence: 99%

See 2 more Smart Citations

Acute Effects of Fluoxetine on Stress Responses and Feeding Motivation in Nile Tilapia

Miranda

Isaac

Silva

et al. 2023

Fishes

View full text Add to dashboard Cite

The selective serotonin reuptake inhibitor fluoxetine is one of the most commonly administered psychotropic medications; however, it has been recognized as toxic to aquatic life. In this study, we showed that stress responses and feeding motivation in Nile tilapia were affected by acute exposure to fluoxetine. To reach that conclusion, we exposed Nile tilapia to 0, 1 or 10 µg/L (environmentally/biologically relevant doses) of fluoxetine over a 24 h period and then exposed them to a handling stressor. We found that the 10 µg/L dose enhanced cortisol response to stress but caused an earlier decrease in the ventilation boost induced by that stressor. An immediate ventilation boost after stressful stimuli indicates sympathetic activation. Thus, this suggests that fluoxetine decreased sympathetic nervous system activity but augmented hypothalamus–pituitary–interrenal axis activity in the fish. Both feeding latency and ingestion were similar among the tested conditions; however, a multiple logistic regression model revealed that in the presence of a stressor or fluoxetine, the Nile tilapia tended to ingest less food but there was a higher probability of this decrease to be associated with fluoxetine. We concluded that acute exposure to environmentally/biologically relevant fluoxetine concentrations over 24 h acted as a modifying factor for Nile tilapia stress physiology and tended to interfere with feeding motivation. An acute stress response is an emergency reaction that contributes to the recovery of homeostasis. In the presence of fluoxetine, modifications of acute stress responses and the tendency to reduce food intake, which restricts the ability to replace the energy spent on stress responses, could compromise the resumption of homeostasis and an animal’s adjustment to different environmental contexts, such as those associated with aquaculture, in which anthropogenic stressors inevitably occur.

show abstract