Resumen

RODRIGO, Romero et al. Automated spawning and fertilization system to obtain alevins of Pacú (Piaractus mesopotamicus) in Paraguay. Compend. cienc. vet [online]. 2022, vol.12, n.1, pp.26-31. ISSN 2226-1761.  https://doi.org/10.18004/compend.cienc.vet.2022.12.01.26.

The native species that inhabit the watersheds of Paraguay reproduce in controlled aquatic environments through hormonal induction, which is carried out in laboratories with different techniques and protocols. Until now, the extrusion technique has been used for the spawning and production of fingerlings in the breeding centers of species of economic importance. The present work consisted in the implementation of the automated spawning and fertilization system using the pacú (Piaractus mesopotamicus) in the maturation stage in ponds. The objective was to evaluate the system with this species through spawning, fertilization and degree hours. It consisted of 3 units connected by pipes; so that the fertilized eggs are automatically transported from the spawning pond to the incubation net, and the hatched larvae are transported from the incubation net to the rearing pond (established by Fu- Guang Liu in Taiwan), in the work wast used pacu parents; 51 females (3.2 kg - 3.7 kg) and 122 males (2.6 kg -2.7 kg). Spawning ranged between 96% and 100%, fertilization being between 61% and 76.6%, and degree hours were from 174 to 270. This research showed that the automated spawning and fertilization system can be used to obtain pacu fingerlings raised in captivity, there being sufficient evidence that the use of the system benefits the survival and reuse of the broodstock, generating better results.

Palabras clave : Piaractus mesopotamicus - Spontaneous induced spawning; Automation in egg collection; Fertility rate.

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