Antidepressants contaminating water bodies, altering behavior of fish population: Study
A recent study has revealed that Prozac, a widely used antidepressant, is contaminating water bodies and adversely affecting fish populations. The research, published in the Journal of Animal Ecology, found that even low levels of fluoxetine (Prozac's active ingredient) can significantly impact the physical condition and reproductive capabilities of male guppies across generations. This discovery raises concerns about the long-term survival of these species.
Prozac's impact on fish populations
The study was led by Dr Upama Aich from Monash University, who emphasized the ubiquity of fluoxetine in our waterways due to increased global consumption of pharmaceuticals. The research involved capturing 3,600 wild guppies and exposing them to varying concentrations of fluoxetine over five years. The findings showed that even low exposure levels negatively affected the overall physical condition and reproductive traits of male guppies across generations.
Prozac alters fish behavior and reproductive traits
Dr Aich noted that low exposure to fluoxetine not only reduced the body condition of male guppies but also their sperm vitality. This could potentially impact their ability to mate and compete with other males, ultimately affecting their survival rates. Interestingly, while the drug decreased sperm speed, it increased the size of the gonopodium, a fin-like organ used for fertilization in females.
Prozac exposure affects fish's risk-taking behavior
In addition to physical changes, fluoxetine exposure also altered the guppies' behavior. The study found that the drug reduced variation in activity and risk-taking behavior among the fish. This could potentially impair their ability to adapt to changes in their natural environment, further threatening their survival. These findings underscore the need for more comprehensive studies on the impact of pharmaceutical pollution on aquatic life.
Pharmaceuticals detected in Victorian rivers and fish
Dr Minna Saaristo from the Environment Protection Authority Victoria, who has conducted research on pharmaceutical pollution, found traces of 18 common drugs in four Victorian rivers. These included antidepressants like Prozac, blood pressure medications, heart drugs, epilepsy medicines, caffeine and antibiotics. The highest concentrations were found in redfin perch and eel. While there is no significant risk to human health currently identified, the regulator is closely monitoring the situation due to its potential impact on aquatic life.
