Breeding of the pink shrimp Farfantepenaeus brasiliensis (Crustacea: Decapoda) in cages in the Lagoa dos Patos estuary, RS
The analysis of the cultivation of Farfantepenaeus brasiliensis and Farfantepenaeus paulensis in cages in Lagoa dos Patos, RS, was carried out from juveniles produced in captivity. The initial average weight of the prawns was approximately 1.15g. The experiment lasted 65 days and was carried out in 6 cages (3 for each treatment) with 5mm mesh opening and 4m2 bottom area. The distribution of individuals in the two treatments (F. brasiliensis and F. paulensis) was random, maintaining the standard density of 20 shrimp / m2 in the experimental units (cages). Partial biometrics were performed every 15 days to adjust the amount of feed provided and evaluate the growth of the shrimp. At the end of the experiment, all the shrimp were weighed and counted to assess survival.There was no significant difference between the survival of F. brasiliensis (94.17 ± 9.04%) and F. paulensis (98.50 ± 0.71%). Although the final average weight was significantly higher for F. brasiliensis (7.98 ± 0.94g), there were no significant differences in biomass production (127.81 ± 17.93 and 126.65 ± 1.74 g / m2) and apparent feed conversion (1.39 ± 0.27 and 1.57 ± 0.09) of F. brasiliensis and F. paulensis, respectively. The results indicate that F. brasiliensis has potential for cultivation in alternative structures and encourage further research to be carried out to develop a technological package for the cultivation of this species in the Lagoa dos Patos estuary.