ESTUDO DE MORFOLOGIA MACROSCÓPICA, MICROSCÓPICA TESTICULAR E EPIDIDIMÁRIA EM EMAS (Rhea americana, Linnaeus 1758)(RHEIDAE)
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Data
2010-12-15
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Universidade Federal de Goiás
Resumo
The purpose of this research was studied the macroscopic morphology of rhea s testis and
epididymis. Were studied testis from 54 rheas, breed in captivity. In commercial slaughter,
were collected testis to analyzed macroscopic measurements of testis and epididymis,
consisting in length, width, thickness, circumference, volume, parenchyma and testicular
capsule weight, also shape, size and blood supply. Of these parameters were calculated
media and standard deviation. The testes looks like a cylinder, the testicular capsule is thin,
dense and transparent, a short testicular artery arises from the A. cranialis renalis. The
organs were influenced of season with reproductive and non reproductive times. In
December/2006 and May/2007 the morphmetric media (x) measurements in right testes was:
volume 58.70 and 14.7 mL , length 9.87 and 3.5 cm, width 2.44 and 0.6 cm, thickness 2.49
and 0.5 cm, circumference 8.02 and 2.3 cm, parenchyma weight 27.66 and 6.1 g and
testicular capsule weight 1.04 and 0.3 g, respectively. In right epididymis was: volume 7.7
and 3.0 mL, length 5.8 and 1.3 cm, width 0.7 and 0.3 cm, thickness 0.6 and 0.3 cm,
circumference 2.5 and 1.2 cm, parenchyma weight 6.4 and 2.8 g and capsule weight 0.4 and
0.1 g, respectively. A few of measurements, in testes and epididymis were bigger in right
side than in left side (p<0.05) showing asymmetry. The medias of November/2005 were in
intermediate position (p<0.05), but near the December/2006 data, probably it could be a
transition phase between the rest and sexual activity (breeding season). The observations
confirms sexual activity season in this specie, by spring summer. Morphologically the
Rhea`s testicles and epididymis hava many points in common with other birds, but
differences were observed, and has influence of seasons. The testicle and epididymis
biometric characteristics were bigger in the breeding seasons.
Key words: Aves, Epididymis, Morphology, Ratites, Reproduction, Seasonality, Testes
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Citação
CARVALHO, Saulo Fernandes Mano de. Macroscopic and microscopic study in testes and epididymis of great rhea (Rhea americana, Linnaeus - 1758)(Rheidae). 2010. 87 f. Tese (Doutorado em Ciências Agrárias) - Universidade Federal de Goiás, Goiania, 2010.