A recent study conducted by Dalhousie University revealed the presence of microplastics in lobsters harvested off the coast of Nova Scotia. Researchers from Dalhousie’s School for Resource and Environmental Studies collected 16 lobsters from various locations in 2022 and examined the edible parts of the tails using a specialized dye that illuminates microplastics under a microscope. Analysis of the lobsters revealed an average of six to seven microplastic particles per gram of meat.
Lead author Amber LeBlanc, a former master’s student at Dalhousie, expressed little surprise at the discovery of microplastics but was amazed by their tiny size and potential diverse sources. The plastics detected had an average size of 3.65 micrometres, significantly smaller than a human hair’s diameter. The study identified polyethylene vinyl acetate, polyester, and polysulfone as the predominant types of plastic found in the lobsters.
The lobsters sampled came from four different locations within Nova Scotia, with those from southwest Nova Scotia showing the highest microplastic concentration. However, due to the study’s limited sample size, further research is required to determine if these geographical variations are consistent. Co-author Tony Walker described the level of microplastics in lobster meat as relatively low compared to other food sources.
Karl Jobst, an associate professor at Memorial University, emphasized the uncertainty surrounding the health implications of microplastic exposure. While microplastics have been found in various organisms, including humans, Jobst highlighted the need for more research to understand the potential risks. Representatives of Nova Scotia’s seafood industry also raised questions about the study, suggesting that microplastics are prevalent in many food sources beyond lobster.
Overall, the study underscores the importance of continued research to assess the impact of microplastics on both marine life and human health. Walker and LeBlanc stress the need for further studies to comprehend the full extent of microplastic contamination in lobsters and its potential consequences.