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Reproductive physiology of Rhamdia quelen is improved by dietary inclusion of probiotics
Author(s) -
Lins Rodrigues Mariana,
Damasceno Danielle Zanerato,
Marques Gomes Ricácio Luan,
Sosa Bruno dos Santos,
Moro Evandro Bilha,
Sanches Eduardo Antônio,
Bittencourt Fábio,
Signor Altevir
Publication year - 2021
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.15020
Subject(s) - biology , probiotic , catfish , sperm , human fertilization , zoology , food science , fishery , anatomy , botany , fish <actinopterygii> , bacteria , genetics
This study evaluated the effects of a probiotic additive on reproductive variables of the silver catfish ( Rhamdia quelen ). Three hundred juveniles (initial mean weight 17.35 ± 0.97 g) were fed for 90 days with diets containing increasing levels of a probiotic additive (0.15, 0.30, 0.45 and 0.60 g/kg of feed), which consisted of a blend between Bacillus subtilis and B. cereus , both at a concentration of 4 × 10 11 CFU/g, and a control diet without the additive. In males, the presence of the probiotic had an effect on relative seminal volume, sperm cells’ survival, gonadosomatic, hepatosomatic and viscerosomatic indexes, as well as transpose beat frequency, displacement velocity, motility rate and straightness of sperm cells. In females, the probiotic inclusion resulted in presented better in spawning and fertilization rates, viscerosomatic fat accumulation and development of germ cells. Additionally, the hepatic integrity and hepatocyte developmental characteristics were preserved by the presence of the probiotic additive. Thus, the inclusion of 0.60 g/kg of the probiotic could be recommended for the improvement of the reproductive performance of R. quelen .