Gonadal macrophage aggregates in fish: A preliminary quantitative study in red mullet

A histological study was conducted in red mullet, Mullus barbatus , collected from two sites characterized by different anthropogenic impacts. The aim of the study was to assess sex‐, size‐, season‐ and site‐related variation in gonadal macrophage aggregate (MA) size, number, and relative area. Gonadal MAs were most abundant in males than in females. The number of MA was significantly higher in males from the most impacted site in October, with...