Reproductive condition of freshwater shrimp Cryphiops caementarius (Molina, 1782) in Arequipa Rivers from December 2017 to April 2018

Authors

  • Angela Incio Instituto del Mar del Perú. Laboratorio Costero de Camaná
  • Sarita Campos Instituto del Mar del Perú. Laboratorio Costero de Camaná
  • Kristhian Pinazo Instituto del Mar del Perú. Laboratorio Costero de Camaná
  • Marco Quiroz Ruiz Instituto del Mar del Perú. Laboratorio Costero de Camaná

Keywords:

Cryphiops caementarius, reproductive condition, management, fertility

Abstract

The freshwater shrimp (Cryphiops caementarius), is a resource of the Peruvian coastal rivers that supports a commercial fishery. An analysis of the monthly and altitudinal variation of their reproductive condition was carried out, given the scarcity of studies on their reproductive biology and to provide information for the sustainable management of its fishery, by analyzing the sex ratio, gonadal development, and fertility of the resource in the Majes-Camaná and Ocoña rivers, which were divided into five altitudinal strata. The predominance of larger males was determined in both rivers, with a sex ratio of 1M: 0.82F for Majes-Camaná and 1M: 0.97F for Ocoña, this ratio favored females only in January and February. The highest GSI value for females was obtained in January, with predominantly mature females in all strata until February, then decreasing in March. The highest percentage of ovigerous females for Ocoña was 68.8% in January and for Majes-Camaná it was 73.3% in February. A direct relationship between fertility and size and altitude was evident. January and February were identified as the months in which the reproductive activity was at its highest in the five altitudinal strata.

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Published

2021-08-16

How to Cite

Incio, A., Campos, S., Pinazo, K., & Quiroz Ruiz, M. (2021). Reproductive condition of freshwater shrimp Cryphiops caementarius (Molina, 1782) in Arequipa Rivers from December 2017 to April 2018. Boletin Instituto Del Mar Del Perú, 35(1), 49–59. Retrieved from https://revistas.imarpe.gob.pe/index.php/boletin/article/view/288

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