Trioecy systems are generally considered to be less stable and less widely distributed. Recently, a rare and mostly hermaphrodite (> 50%) trioecy system was detected in a single indigenous population of Corbicula fluminea. While hermaphrodite specimens are common in the invaded range, dioecy systems dominate C. fluminea populations in native regions, with trioecy populations being rare and transient in both ranges. To date, the stability of this trioecy system, as well as how environmental conditions effect sex allocation and reproductive activities remains unknown. To address this, the popula...
