Biometric testicular and serum testosterone concentration of Brazilian Ponies stallions

RUA, Miguel Alejandro Silva; QUIRINO, Celia Raquel; VEJA, Wilder Hernando Ortiz; BARTHOLAZZI, Aylton; BASTOS, Rosemary; MATOS, Luis Fonseca; DAVID, Caroline Marçal Gomes

doi:10.1590/S1519-99402017000100019

home Sumário navigate_before Anterior Atual Seguinte navigate_next

home Sumário

Reprodução Animal • Rev. bras. saúde prod. anim. 18 (1) • Mar 2017 • https://doi.org/10.1590/S1519-99402017000100019 linkcopy

Biometric testicular and serum testosterone concentration of Brazilian Ponies stallions

Biometria testicular e concentrações séricas de testosterona de garanhões Pôneis da raça Brasileira

Authorship SCIMAGO INSTITUTIONS RANKINGS

SUMMARY

Evaluation of the testis size is very important in stallions’ selection, since it is an indirect determinant of their reproductive potential. The aim of this study was to evaluate the biometric testicular traits, calculate the volume testicular and analyze the serum testosterone concentration of the stallion. During six months were measured the tests of adults Brazilian Ponies stallions from northern of Rio de Janeiro State, Brazil. The length, the width and the height of the testicles (TL, TW and TH) were measured. From these measurements, the total testicular volume (TTV) was calculated. The serum testosterone concentration was also evaluated. The data were studied by analysis of variance and were calculated the correlations among the traits. The average of the testis biometry were TL 5.8 ± 0.6 cm; TW 3.8 ± 0.5 cm; TH 4.7 ± 0.4 cm and 111.2 ± 27.7 for TTV. Mean of serum testosterone concentration was 0.89 ± 0.52 ng/dl. High correlations between biometry testicular traits with testicular volume were observed and low to moderate correlations were observed for testicular traits, testosterone and sperm output. The testis size could be an important trait that assists to the prediction of stallion's reproductive potential of the Brazilian ponies stallions. It is suggested that there would be no fluctuation in serum testosterone concentration in Brazilian ponies stallions that coult afect on its fertility.

Keywords: andrology; horse; reproduction

Month/Season	TL (cm)	TW (cm)	TH (cm)	TTV (cm3)
December-BS	5.8 ± 0.7^a	3.5 ± 0.5^a	4.2 ± 0.3^b	93,9 ± 30,3^a
March-BS	6.0 ± 0.7^a	3.8 ± 0.4^a	5.0 ± 0.4^a	123,0 ± 39,4^a
April-BS	6.0 ± 0.6^a	3.8 ± 0.4^a	5.0 ± 0.4^a	123,0 ± 39,4^a
May-NBS	6.0 ± 0.3^a	3.9 ± 0.3^a	4.8 ± 0.2^a	119,5 ± 18,4^a
August-NBS	5.8 ± 0.6^a	3.7 ± 0.4^a	3.9 ± 0.5^b	90,0 ± 25,9^a
September-NBS	5.6 ± 0.6^a	4.1 ± 0.4^a	4.7 ± 0.4^a	117,2 ± 30,4^a

Month/Season	Concentration (x 10⁶/ml)	Testosterone (ng/ml)
December-BS	389.3 ± 235.0^ab	1.4 ± 0.3^a
March-BS	572.5 ± 247.8^a	-
April-BS	273.1 ± 112.1^ab	0.4 ± 0.1^a
May-NBS	383.1 ± 153.9^a	0.9 ± 0.7^a
August-NBS	500.2 ± 237.8^ab	0.7 ± 0.2^a
September-NBS	-	0.8 ± 0.5^a

	TTV	Conc	Test	TL	TW	TH
TTV	-	-	-	-	-	-
Conc	0,23	-	-	-	-	-
Test	0,20	0,16	-	-	-	-
TL	0,81^ Highly significant (p<0,001).	0,14	0,08	-	-	-
TW	0,86^ Highly significant (p<0,001).	0,04	0,20	0,55^* * Significant (p<0,05),	-	-
TH	0,85^ Highly significant (p<0,001).	-0,04	0,09	0,55^ Highly significant (p<0,001).	0,64^ Highly significant (p<0,001).	-

vertical_align_top file_download show_chart

more_horizclose
- image
- translate
- link
- article
- vertical_align_top
- file_download
- show_chart
- image
- translate
- link
- article

location_on

UFBA - Universidade Federal da Bahia Avenida Milton Santos, 500 - Ondina , CEP 40170-110 Salvador-BA Brasil, Tel. 55 71 32836725, Fax. 55 71 32836718 - Salvador - BA - Brazil
E-mail: rbspa@ufba.br

rss_feed Acompanhe os números deste periódico no seu leitor de RSS

Acessibilidade / Reportar erro

[TFN1] Equal letters in the same column don't show statistical difference between the means (p > 0.05). BS = Breeding season, NBS = non-breeding season.