Latin American Journal of Aquatic Research, 47(4Reproductive): 612-625, cycle2019 of Aplodinotus grunniens females 1 DOI: 10.3856/vol47-issue4-fulltext-4 Research Articles Reproductive cycle of Aplodinotus grunniens females (Rafinesque, 1819) in the Usumacinta River, Mexico Raúl E. Hernández-Gómez1, Wilfrido M. Contreras-Sánchez2, Arlette A. Hernández-Franyutti2 Martha A. Perera-García3 & Aarón Torres-Martínez2 1División Académica Multidisciplinaria de los Ríos, Universidad Juárez Autónoma de Tabasco Tabasco, México 2División Académica de Ciencias Biológicas, Universidad Juárez Autónoma de Tabasco Villahermosa-Cárdenas, Tabasco, México 3División Académica de Ciencias Agropecuarias, Tabasco, México Corresponding author: Wilfrido M. Contreras-Sánchez (
[email protected]) ABSTRACT. The freshwater drum Aplodinotus grunniens is a species widely distributed in North America. In the Mexican southeast, this species occurs in the Usumacinta River, where it supports an artisanal fishery. In this regard, the present study was conducted to supply detailed information on the female reproductive cycle of this species. Calculations of gonadosomatic (GSI) and hepatosomatic (HSI) indexes, histological and visual staging of ovaries as well as the staging of oocyte development were applied together to determine the reproductive changes during an annual cycle. The histological analysis revealed the presence of spawning capable females throughout the year, and the distribution frequencies of oocyte diameters displayed the continuous occurrence of mature