2004
DOI: 10.1590/s0102-09352004000100008
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Abstract: RESUMORealizaram-se estudos morfológico e funcional da espermatogênese em 15 testículos de catetos adultos, provenientes de abatedouro comercial de animais silvestres. Foram estudados os estádios do ciclo do epitélio seminífero (CES), a população celular dos túbulos seminíferos, o rendimento intrínseco da espermatogênese, o índice das células de Sertoli, o diâmetro médio dos túbulos seminíferos e a proporção volumétrica dos componentes do parênquima testicular. O coeficiente de eficiência de mitoses espermatog… Show more

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Cited by 38 publications
(46 citation statements)
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“…At the age of 150 days, it was observed that each type A spermatogonia produced only 35.82 round spermatids. This rate was similar to what was found in adult boars (Costa and Silva 2006), but below the rate described for domestic pigs (França and Russell 1998), Piau pigs (França 1991) and sheared sheep (Martins et al 2008), and higher than the rates found for adult peccaries (Costa et al 2004) and agoutis (Assis- Neto et al 2003e).…”
Section: Spermatogenetic Yield and Sertoli Indexsupporting
confidence: 79%
See 1 more Smart Citation
“…At the age of 150 days, it was observed that each type A spermatogonia produced only 35.82 round spermatids. This rate was similar to what was found in adult boars (Costa and Silva 2006), but below the rate described for domestic pigs (França and Russell 1998), Piau pigs (França 1991) and sheared sheep (Martins et al 2008), and higher than the rates found for adult peccaries (Costa et al 2004) and agoutis (Assis- Neto et al 2003e).…”
Section: Spermatogenetic Yield and Sertoli Indexsupporting
confidence: 79%
“…These studies have included investigations of cattle Curtis and Amann 1981), pigs (Orsi et al 1985;França 1987), buffalo (Melo and Vale Filho 1992) and goats . However, similar studies on Brazilian wildlife are scarce and have primarily been performed on the collared peccary, white-lipped peccary, agouti paca and capybara (Assis- Neto et al 2003a;Costa et al 2004. Methods for histological quantification of the efficiency of spermatogenesis can accurately determine spermatozoa production in individuals of the same species or among species (Vale Filho 2001).…”
Section: Introductionmentioning
confidence: 99%
“…At 12 months of age, the GSI was 0.16%, which was close to that reported in cathetus (Costa et al 2004) and capybaras (Paula et al 2002). However, it was approximately half of that described for adult wild boars (Almeida et al, 2006) and domestic pigs (Godinho et al 1979;França et al 2000).…”
Section: Discussionsupporting
confidence: 86%
“…The gonadosomatic index, which expresses the relationship between testicular mass and total body weight, was calculated by dividing the gross weight of the testicle (multiplied by two) by body weight and the result was multiplied by one hundred (Costa et al, 2004).…”
Section: Methodsmentioning
confidence: 99%
“…Histological slides were colored by hematoxylin and eosin technique. The histomorphological analysis occurred by Zeiss microscope with a Progress 300 digital color camera and a KS400 image analyzer, that did the quantification of the cell types (Spermatogonia A, Spermatocyte I, Spermatid and Sustentocytes Sustentocytes), and obtaining spermatogenesis yield, using the Abercrombie (1946) formula modified by Amann (1962), quoted by Sarti (2006), de Paiva Foletto et al andCosta et al (2004).…”
Section: Methodsmentioning
confidence: 99%