Using head, pectoral girdle bones and otoliths to estimate length and weight of Argentine anchovy (Engraulis anchoita), a key species in Patagonian marine ecosystem

The Argentine anchovy, Engraulis anchoita, plays a vital role as key prey species for several marine predators in the north Patagonian ecosystem of Atlantic Ocean. Reconstructing length and weight each consumed specimen is essential to provide detailed description trophic ecology top predators. Predictive linear regression equations were calculated stock anchovy estimate parameters length-weight relationships using measurements whole individuals diagnostic elements such otoliths, head bones pectoral fin bones. Among analyzed, cleithrum dentary exhibited best fit. This study validates use girdle reliable indicators predicting across wide size range, which corresponds target range various These can contribute determination body condition, estimation biomass, calculation energy density, providing valuable insights into southern