Flores-Anaya, R.J., C., Quiñonez-Velázquez, D., Arizmendi-Rodríguez & X.G., Moreno-Sánchez (2024). Estimation of age, growth, and length at first maturity of the round herring Etrumeus acuminatus (Gilbert, 1890) on the western coast of Baja California Sur, Mexico. Latin American Journal of Aquatic Research. 52(5): 713-726. DOI: 10.3856/vol52-issue5-fulltext-3201.
Ricardo Javier Flores-Anaya 1, Casimiro Quiñonez-Velázquez 2, Dana Arizmendi-Rodríguez 3 y Xchel Gabriel Moreno-Sánchez 2
ABSTRACT. In Mexico, the round herring Etrumeus acuminatus is caught along with other small pelagic fishesof the Western Baja California Sur coast (WBCSC) and Gulf of California. This species has a discontinuousdistribution on the eastern margin of the Pacific Ocean, and its population structure and dynamics are unknown.In this study, we evaluated the direct determination of age using otoliths, estimated length at first sexual maturity(L50), and individual growth parameter determination of round herrings caught off the WBCSC. A total of 731specimens were collected through monthly biological sampling from 2012 to 2022. Age-length data wereobtained from 617 otoliths. The growth was isometric (b = 3); however, the differences in the length-weightrelationship were significant between sexes (F = 7621, P < 0.05). Up to seven age groups were identified (0 ±6). The L50 and individual growth parameters were estimated using a multimodel approach. The Lysack (1979),White et al. (2002), Brouwer & Griffiths (2005), and logistic models showed statistically solid support for L50estimation in both sexes. The von Bertalanffy model provided the best fit for the data to describe individualgrowth in both sexes. Significant differences between sexes were detected in the L50 estimates (P < 0.05).However, the differences in growth parameters between sexes were not statistically significant (P > 0.05).
Palabras clave: Etrumeus acuminatus; Age; multimodel approach; L50, allometry; individual growth
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