Otoliths morphology and age-record in Bagre panamensis (Siluriformes: Ariidae) inhabiting at the southeast of Gulf of California

Juan Antonio Maldonado-Coyac, Rebeca Sánchez-Cárdenas, Jorge Saúl Ramírez-Pérez, Luis Antonio Salcido Guevara, Karla Paola Valdez-Núñez, Armando Pérez-Centeno, Maria de los Angeles Maldonado-Amparo

Submited: 2020-10-09 02:33:08 | Published: 2021-07-04 18:09:42

DOI: https://doi.org/10.3856/vol49-issue3-fulltext-2654

Abstract


Among Bagre genera, there is a high variation in the estimation of age, a concern due to overexploitation risk in fisheries because of age underestimation. Bagre panamensis is an important fishery resource of the Mexican Pacific and the Gulf of California. Its age is known from otoliths, but its accuracy needs to be confirmed, and the periodicity of the otoliths record validated. The external morphology, some microstructure attributes, and age record of B. panamensis' otoliths were described from 371 specimens collected southeast of the Gulf of California. The lapilli otoliths were larger than the sagittae and asterisci otoliths. The lapilli otoliths present aragonite crystals with a prismatic shape, and their growth is radial, from the core to the otolith edge. The lapilli otoliths form an annual growth ring, defined by the slowdown in the growth that occurs during April to July, during the breeding season. The ages of the individuals ranged from 1 to 15 years, and the applied method is considered adequate and accurate for its estimation (otolith cross-sectioning and red-neutral staining).

Maldonado-Coyac J, Sánchez-Cárdenas R, Ramírez-Pérez J, Salcido Guevara L, Valdez-Núñez K, Pérez-Centeno A, Maldonado-Amparo M. Otoliths morphology and age-record in Bagre panamensis (Siluriformes: Ariidae) inhabiting at the southeast of Gulf of California. Lat. Am. J. Aquat. Res.. 2021;49(3): 404-417. Available from: doi:10.3856/vol49-issue3-fulltext-2654 [Accessed 8 Dec. 2021].
Maldonado-Coyac, J., Sánchez-Cárdenas, R., Ramírez-Pérez, J., Salcido Guevara, L., Valdez-Núñez, K., Pérez-Centeno, A., & Maldonado-Amparo, M. (2021). Otoliths morphology and age-record in Bagre panamensis (Siluriformes: Ariidae) inhabiting at the southeast of Gulf of California. Latin American Journal of Aquatic Research, 49(3), 404-417. doi:http://dx.doi.org/10.3856/vol49-issue3-fulltext-2654