Reproductive evaluation of males of pink shrimp Farfantepenaeus duorarum grown in Bio-Floc Tecnology system
The pink shrimp Farfantepenaeus duorarum is an important fishing resource that is distributed in the Atlantic Ocean from the state of Maryland in the USA to Bahia de Ascensión, in the state of Quintana Roo in Mexico. The objective of the present work was to evaluate the reproductive and nutritional quality of males by counting and characterizing sperm cells from shrimp kept in conventional systems with clear water and a biofloc system. The experiment was developed in a phase of termination (60 days), pre-maturation (30 days) and reproductive performance (45 days). The males were submitted to three treatments: BF + P bioflocs with commercial feed 35% PB; BF + PF biofloc with fresh food and feed and CR + PF clear water with fresh food and feed.In the reproductive performance phase the prawns from all treatments went to the maturation room where they were fed fresh food. The water quality parameters during the three phases of the experiment showed no significant difference between treatments (P> 0.05) and were at the appropriate levels for shrimp farming. During the reproductive performance phase, no significant differences (P> 0.05) were found in the number of total sperm cells between treatments, with the CR + PF treatment showing 8.9 ± 5.83 x106 cells and the BF + treatments. P and BF + PF showed 12.35 ± 10.2 and 12.96 ± 5.2 x106 cells respectively, with a percentage greater than 96% in all treatments, after a period of 45 days of reproductive performance. There was no significant difference (P> 0,05) in the data of the Gonodosomatic Index, between treatments, in the initial display or in the final sample. The metabolite data in the male gonad did not show significant difference (P> 0.05) between treatments. The data on triglycerides and cholesterol in the gonad showed no significant difference. The total protein data in the CR + RF treatment were statistically different from the BF + R and BF + RF treatments. The BF + P Treatment proved to be an option to prepare F. duorarum breeding males.