Flores Anaya, R.J., J.A., Gómez Toledo, L., Morales Hernández, E., Alvarez Trasviña, U., Jakes Cota & C., Quiñonez Velázquez (2024). Relationship between maturity and body shape in Round herring Etrumeus acuminatus off Mexican coasts. 24th Annual Trinational Sardine & Small Pelagics Forum. Ensenada, BC, México, mayo 21 - 22, 2024, 1.
Ricardo Javier Flores Anaya 1, Josue Alejandro Gómez Toledo 2, Lisset Morales Hernández 1, Eduardo Alvarez Trasviña 1, Ulianov Jakes Cota 3 y Casimiro Quiñonez Velázquez 3
Theround herring Etrumeus acuminatus inhabits the eastern coast of the Pacific Ocean, from Monterey Bay (California, USA) to Cabo San Lucas (Baja California Sur) and the Gulf of California, Mexico, as well as from Ecuador to Chile. In Mexico, it is caught along with other species in two fishing areas: the western coast of Baja California Sur (WCBCS) and the Gulf of California (GC), the species representing marginal catch (2%) relative to the total catch of minor pelagic fish. However, Mexico ranks second globally, after Japan, in terms of capture volume of Etrumeus genus. Geometric morphometrics as a tool for shape analysis is increasingly used in fisheries management to identify species and population units (morphotypes-stocks), although some studies often overlook the reproductive cycle as a potential cause that could bias the results. Therefore, the hypothesis that changes in gonadal condition modify the body shape of the round herring is evaluated. The objective is to address the analysis of body shape in relation to gonadal maturity of the round herring from WCBCS and GC. The results showed two morphotypes related to gonadal maturity, which in turn differed between zones. This implies considering gonadal maturity in sample selection when comparing body shape to evaluate differences between populations of round herrings.
Palabras clave: Morphometrics; morphotypes; small pelagic fish; round herring; Stock
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