Qualitative parameters of the piapara semen (Leporinus elongatus Valenciennes, 1850)

Qualitative parameters of piapara semen (Leporinus elongatus) were evaluated before and after hormonal induction with carp pituitary extract at 2.5 mg.kg(-1) of live weight. The progressive motility, the spermatic vigor and the lifetime of the spermatozoa were higher before the hormonal induction (P...

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Bibliographic Details
Published in:Brazilian journal of biology 2008-05, Vol.68 (2), p.373-377
Main Authors: Streit, Jr, D P, Sirol, R N, Ribeiro, R P, Moraes, G V, Vargas, L D M, Watanabe, A L
Format: Article
Language:English
Subjects:
Animals
BIOLOGY
Carps
fish
Fishes - classification
Fishes - physiology
Leporinus elongatus
Male
Pituitary Hormones - pharmacology
Semen - drug effects
Semen - physiology
Sperm Motility - drug effects
Sperm Motility - physiology
spermatic cells
spermatic morphology
Spermatozoa - abnormalities
Spermatozoa - physiology
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Summary:Qualitative parameters of piapara semen (Leporinus elongatus) were evaluated before and after hormonal induction with carp pituitary extract at 2.5 mg.kg(-1) of live weight. The progressive motility, the spermatic vigor and the lifetime of the spermatozoa were higher before the hormonal induction (P > 0.05). The percentage of normal spermatozoa and spermatozoa with secondary pathologies did not differ (P > 0.05) between treatments: before induction (44.0 and 44.4%, respectively) and after-induction (44.3 and 46.7%, respectively). However, the percentage of primary pathologies was higher (P < 0.05) for the semen collected before induction than for the semen collected after induction; the estimates were 12.2 and 8.0%, respectively. The most frequent pathologies were the taillessness with the frequencies of 27.4 and 36.3% followed by the headlessness for which the estimates were 10.1 and 3.9%, before and after induction respectively. The semen collected before the hormonal induction presented better qualitative parameters.
ISSN:1519-6984
1678-4375
1519-6984
DOI:10.1590/S1519-69842008000200019