We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Hormonal induction and semen characteristics of tambaqui Colossoma macropomum.
- Authors
Maria, Alexandre Nizio; Azevedo, Hymerson Costa; Santos, Jadson Pinheiro; Carneiro, Paulo César Falanghe
- Abstract
In the hatchery-bred tambaqui Colossoma macropomum, spontaneous semen release does not occur, and hand-stripping produces reduced semen volume. The goal of this work is to evaluate the effects of hormonal induction with carp pituitary extract (CPE) on both qualitative (visual aspect, pH, motility, viability and morphological abnormalities) and quantitative (volume, concentration and number of spermatozoa per ejaculate) traits of tambaqui semen. Eleven males were treated with CPE (induced), and 11 were left untreated as a control (non-induced). All analysed parameters except motility and percentage of viable spermatozoa presented significant differences (p < 0.05) between the induced and non-induced treatments. CPE induction resulted in a 25-fold increase in semen volume and a 10-fold increase in the number of spermatozoa collected. However, both sperm concentration and the frequency of sperm with morphological abnormalities (commonly detached heads or bent tails) were significantly lower in CPE-induced fish. The hormonal induction of tambaqui males with CPE is efficient and positively influences some qualitative and quantitative properties of semen. Additionally, semen collection via gentle abdominal massage occurs more readily in CPE-induced fish.
- Subjects
FISH spermatozoa; TAMBAQUI; SEMEN analysis; SPERM motility; QUALITATIVE chemical analysis; HORMONE therapy; CELL survival
- Publication
Zygote, 2012, Vol 20, Issue 1, p39
- ISSN
0967-1994
- Publication type
Article
- DOI
10.1017/S0967199410000559