Boultby Elise N, Martino Jasmin C, Baring Ryan, Doubleday Zoë A
College of Science & Engineering, Flinders University, Bedford Pk., Adelaide South Australia, Australia.
MARIS labs, Future Industries Institute, University of South Australia, Adelaide, South Australia, Australia.
R Soc Open Sci. 2024 May 15;11(5):231673. doi: 10.1098/rsos.231673. eCollection 2024 May.
Growing demand for high-value seafood is fuelling provenance fraud, which threatens the sustainability of wild fisheries while posing biosecurity and human health risks. Here, we investigated carbon ( C) and oxygen ( O) isotopes in abalone shells ( sp.) to determine the production method and geographical provenance. Using X-ray diffraction and isotope ratio mass spectrometry, we found that shell mineralogy did not influence isotope values. Isotope values between wild and farmed sectors were statistically different, with 64% of individuals correctly classified as farmed or wild. Subsequently, we successfully distinguished the provenance of abalone collected from farms (with 83% of individuals correctly classified), as well as wild-caught abalone collected from four state jurisdictions (with 88% correctly classified). Carbon isotopes were strongly correlated to longitude, with both isotopes correlated to latitude. Overall, this study demonstrates the potential of isotopic fingerprints in gastropod shells to track the provenance of commercially valuable species.
对高价值海鲜不断增长的需求正在助长产地欺诈行为，这不仅威胁到野生渔业的可持续性，还带来生物安全和人类健康风险。在此，我们研究了鲍鱼壳（种）中的碳（C）和氧（O）同位素，以确定其生产方式和地理来源。通过X射线衍射和同位素比率质谱分析，我们发现贝壳矿物学不影响同位素值。野生和养殖部门之间的同位素值在统计学上存在差异，64%的个体能被正确分类为养殖或野生。随后，我们成功区分了从养殖场采集的鲍鱼的来源（83%的个体被正确分类），以及从四个州辖区采集的野生捕获鲍鱼的来源（88%被正确分类）。碳同位素与经度密切相关，两种同位素都与纬度相关。总体而言，这项研究证明了腹足类贝壳中同位素指纹在追踪商业上有价值物种来源方面的潜力。
