Reproduction of Cortez oyster Crassostrea corteziensis (Hertlein 1951) in a growing area in the central Mexican Pacific coast

Mariana Mena Alcántar, Carlos Alberto Romero Bañuelos, Javier Marcial de Jésus Ruiz Velazco, José Trinidad Nieto Navarro, Deivis Samuel Palacios Salgado, Juan Manuel Pacheco Vega, Oscar Iram Zavala Leal

Submited: 2016-08-29 13:26:23 | Published: 2017-05-22 18:15:36

DOI: https://doi.org/10.3856/vol45-issue2-fulltext-23

Abstract


The state of Nayarit is the main oyster producer in the Mexican Pacific, this deriving from artisanal crops. These consist of collecting wild seeds. Despite its importance, to our knowledge there are no studies on the reproduction of the oyster Crassostrea corteziensis in Boca de Camichín, Nayarit State, Mexico, which is the area with highest production (around 90%). The aim of this study was to evaluate the reproduction (sex ratio, Condition index [CI], gonadal development, reproductive cycle, and recruitment size at reproduction) and its relationship with environmental factors. Sixty oysters were sampled monthly at La Palicienta Lagoon for one year. In the laboratory, the organisms were weighed and measured and then fixed 10% formalin for histological analyses. Subsequently, the gonads were processed by histology (Hematoxylin-Eosin [H&E]). Sex ratio was different from 1:1 (p ˂0.05), with a predominance of females. The Condition index (CI) was higher from March to July. Five phases of gonadal development were observed: undifferentiated; gametogenesis; ripe; spawning, and post-spawning. In Cortez oyster spawning is most prevalent in August, May, and October. The temperature has a positive relationship with reproduction (p ˂0.05). Recruitment size at reproduction was 57.1 mm. The results of this study could contribute useful information about seed collection in Boca de Camichín, Nayarit.


Mena Alcántar M, Romero Bañuelos C, Ruiz Velazco J, Nieto Navarro J, Palacios Salgado D, Pacheco Vega J, Zavala Leal O. Reproduction of Cortez oyster Crassostrea corteziensis (Hertlein 1951) in a growing area in the central Mexican Pacific coast. Lat. Am. J. Aquat. Res.. 2017;45(2). Available from: doi:10.3856/vol45-issue2-fulltext-23 [Accessed 22 Jan. 2019].
Mena Alcántar, M., Romero Bañuelos, C., Ruiz Velazco, J., Nieto Navarro, J., Palacios Salgado, D., Pacheco Vega, J., & Zavala Leal, O. (2017). Reproduction of Cortez oyster Crassostrea corteziensis (Hertlein 1951) in a growing area in the central Mexican Pacific coast. Latin American Journal of Aquatic Research, 45(2). doi:http://dx.doi.org/10.3856/vol45-issue2-fulltext-23