Determinación de talla mínima de reproducción del recurso Pata de mula o Casco de burro (Anadara grandis), en Puerto El Morro

Abstract

This study establishes the rationale for conserving the pata de mula (giant cockle, Anadara grandis) resource in the Puerto El Morro estuary, where the primary stakeholders involved in the fishery are local residents. Challenges facing this emerging fishery include the lack of regulatory measures and a limited understanding of the species' biology due to a scarcity of prior research. Specimens were collected at random locations within the channel between June and August 2018. Samples underwent biometric recording—followed by size-class classification, fresh analysis, and histological fixation—to generate relevant biological data. The results allowed for the differentiation of gonad maturity stages (undetermined, developing, mature, and spent). Statistical modeling with 95% confidence intervals determined the Minimum Size at Sexual Maturity (MSSM) for *A. grandis* to be 44.8 mm. We recommend that competent authorities implement management measures based on a calculated *Lt50%* of 60.5 mm, as the study demonstrated that adopting this size as the minimum catch limit ensures the species' sustainability.