Automated spawning and fertilization system to obtain alevins of Pacú (Piaractus mesopotamicus) in Paraguay
The native species that inhabit the watersheds of Paraguay reproduce in controlled aquaticenvironments through hormonal induction, which is carried out in laboratories with different techniquesand protocols. Until now, the extrusion technique has been used for the spawning and production offingerlings in the breeding centers of species of economic importance. The present work consisted in theimplementation of the automated spawning and fertilization system using the pacú (Piaractusmesopotamicus) in the maturation stage in ponds. The objective was to evaluate the system with thisspecies through spawning, fertilization and degree hours. It consisted of 3 units connected by pipes; sothat the fertilized eggs are automatically transported from the spawning pond to the incubation net, andthe hatched larvae are transported from the incubation net to the rearing pond (established by Fu- GuangLiu in Taiwan), in the work wast used pacu parents; 51 females (3.2 kg - 3.7 kg) and 122 males (2.6 kg -2.7kg). Spawning ranged between 96% and 100%, fertilization being between 61% and 76.6%, and degreehours were from 174 to 270. This research showed that the automated spawning and fertilization systemcan be used to obtain pacu fingerlings raised in captivity, there being sufficient evidence that the use ofthe system benefits the survival and reuse of the broodstock, generating better results.
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| Format: | Digital revista |
| Language: | spa |
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Dirección de Investigación Científica y Tecnológica
2022
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| Online Access: | https://revistascientificas.una.py/index.php/comp/article/view/2984 |
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