Fish traceability: Guessing the origin of fish from a seafood market using fish scale shape

摘要: Abstract Fish traceability is an important tool in fish food safety and a recognition the assessment of biodiversity fisheries. Geometric morphometric methods were used to establish whether scale morphology may determine origin specimens from market. In order trace fish, shape two mugilids species Mugil cephalus curema three different trade premises at Mexico City central market was analyzed compared with previously collected samples known areas along Gulf Pacific coasts. The kept closed envelope revealed end study. Scale described using seven landmarks, coordinates which subjected generalised Procrustes analysis, followed by principal components analysis discriminant analysis. Discriminant classification as main indicator identify source where percentage discrimination traced specimens, respectively. A leave-one-out procedure applied validate results functions on shape, relative warp size-shape space (shape plus size). Results showed that correctly classified 83.3% cases, 100% for adjacent geographic areas. size) scales could be reliably populations applying geometric one per specimen. effectively use such approach fisheries management, it necessary have previous patterns shapes each locality. Since possible improve tracing rate increasing number landmarks used. thus offers straightforward, accessible, quick inexpensive method stocks.