Abstract

RIVEROS-PINILLA, Diego A et al. Effect of hormone induction protocol in the spermiation and seminal characteristics of yaque (Leiarius marmoratus). Orinoquia [online]. 2017, vol.21, n.1, pp.34-40. ISSN 0121-3709.  https://doi.org/10.22579/20112629.392.

The yaque Leiarius marmoratus is specie of native silurid, with great potential for the diversification of the colombian aquaculture; however, the spermiation in captive yet presents difficulties due to the low seminal volume released with traditional induction protocols. In consequence, the aim of this study was to evaluate the effects of five protocols of hormonal induction based on carp pituitary extract (EHC), sGnRHa + domperidone (OVAPRIM®) and human chorionic gonadotropin (GHC) (FERTIVET®) on seminal quality and volume of the specie. Were selected 18 sexually mature males of 54,4 ± 2,2 cm in total length and 1,6 ± 0,1 kg body weight. 5 treatments were evaluated so: T1 : 0,25 ml/kg (0 h) and 1 ml/kg of OVAPRIM® (12 h ); T2: 1 mg/kg of EHC (0 h) and 3 mg/kg of EHC (12 h) ; T3 : single dose of 200 UI/kg HCG; T4: 3 mg/kg of EHC (0 h) and 200 UI /kg GHC (8h) ; T5: 1 ml/kg of OVAPRIM® (0h) and 200 U.I / kg of GHC (8h) ; Control: 1 ml of saline solution. Semen was obtained 6 hours after the last dose hormone. T1 and T5 showed a larger volume (p<0.05) (5,4 ± 1,1, 4,8 ± 1,2 ml) compared to T2 (3,1 ± 1ml), T3 (2,3 ml) T4 (2,4 ± 1.1 ml) and control (0.2 ml). Regarding motility and activation time, T1 and T5 had the best results (90 ± 0 % and 54,2 ± 7 s; 90 ± 0 % and 52,9 ± 3,8 s, respectively). The sperm concentration was higher in (p<0,05) T2 and T5 (1,275 ± 322, ± 225 and 1,261 sptz x 103/ul) compared with the other treatments. In conclusion, hormonal induction with OVAPRIM® combined with HCG, are effective for the seminal production in the specie.

Keywords : carp pituitary extract; catfish; domperidone; human chorionic gonadotropin; spermatozoa..

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