Histomorphometric evaluation of the neotropical brown brocket deer Mazama gouazoubira testis, with an emphasis on cell population indexes of spermatogenic yield

Costa, Kyvia Lugate Cardoso; Matta, Sérgio Luís Pinto da; Gomes, Marcos de Lucca Moreira; Paula, Tarcízio Antônio Rêgo de; Freitas, Karine Moura de; Carvalho, Fabíola de Araújo Resende; Silveira, Juliana de Assis; Dolder, Heidi; Mendis‐Handagama, S. M. L. C.

doi:10.1016/j.anireprosci.2011.07.016

Cited by 36 publications

(62 citation statements)

References 41 publications

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“…The testicular parenchyma is a functional part of the testis and consists of two compartments: a tubular compartment and an interstitial one (21). Tubular measurement is one of the approaches used as a spermatogenic indicator in experiments related to the testicular function (3,6,20). Differences between the parameters in the experimental and control groups depending on omega-3 and -6 polyunsaturated fatty acids are presented in Table 3.…”

Section: Resultsmentioning

confidence: 99%

Histomorphometric study on testes in rams fed with linseed oil rich in omega-3 and -6 polyunsaturated fatty acids

Vaškas¹,

Šiukščius²,

Razmaitė³

et al. 2017

Medycyna Weterynaryjna

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Many researchers have pointed out that the intake of omega-3 and -6 fatty acids is beneficial to animal health and reproductive capacity, but the effect of fatty acids on the histomorphology of ram testes is still unknown. The aim of this study was to investigate the effect of linseed oil containing polyunsaturated fatty acids on the morphology and histomorphometric characteristics of ram testis and epididymis. Testes of 12 Lithuanian local coarse wool rams were investigated histomorphologically and histomorphometrically in the present work. The rams were divided into two groups, an experimental group and a control group following, the principle of analogues – the same origin, age, weight, and condition score. The experimental group (n = 6) received 2% linseed oil sediments while the control group (n = 6) received 1.2% sunflower oil for 9 months. The diameter of testicular tubules and the height of the germinal epithelium, the spermatogenic index and the number of Leydig cells were higher in the experimental group than those in the control group. In addition, the number of degenerated tubules was not significantly lower in the group that received 2% linseed oil sediments. Still, the height of the epididymal epithelium was lower than that in the control group....

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Section: Resultsmentioning

confidence: 99%

Histomorphometric study on testes in rams fed with linseed oil rich in omega-3 and -6 polyunsaturated fatty acids

Vaškas¹,

Šiukščius²,

Razmaitė³

et al. 2017

Medycyna Weterynaryjna

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“…These data were obtained by subtracting the total testicular weight of the total weight of the testicular albuginea. As the density of the testicle is around 1 (Johnson et al, 1981;Costa et al, 2011), the testis weight was considered equal to its volume. These measures were performed using the software Image-Pro Plus ® associated to photomicroscope Olympus AX-70, in a 200x magnification.…”

Section: Testicular Histology and Morphometrymentioning

confidence: 99%

Seasonal variation of energy reserves and reproduction in neotropical free-tailed bats Molossus molossus (Chiroptera: Molossidae)

et al. 2013

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Seasonal variation is a key factor regulating energy metabolism and reproduction in several mammals, including bats. This study aimed to track seasonal changes in the energy reserves of the insectivorous bat Molossus molossus associated with its reproductive cycle. Adult males were collected during the four neotropical annual seasons in Viçosa -MG, Brazil. Blood and tissues were collected for metabolic analysis and testes were removed for histology and morphometry. Our results show that liver and breast muscle glycogen concentrations were significantly lower in winter. The adiposity index was significantly higher in the fall compared to winter and spring. Seminiferous tubules were greater in diameter in animals captured in fall and winter, indicating a higher investment in spermatic production during these seasons. The percentage of Leydig cells was higher in summer compared to fall and winter. We suggest that M. molossus presents a type of seasonal reproduction with two peaks of testicular activity: one in fall, with higher sperm production (spermatogenesis), and another in summer, with higher hormone production (steroidogenesis). The metabolic pattern may be associated with reproductive events, especially due to the highest fat storage observed in the fall, which coincides with the further development of the seminiferous tubules.Keywords: spermatogenesis, histology, insectivorous, males, metabolism. Variação sazonal das reservas energéticas e a reprodução do morcego neotropical de cauda livre Molossus molossus (Chiroptera: Molossidae) ResumoA variação sazonal é um fator chave na regulação do metabolismo energético e da reprodução em vários mamíferos, incluindo os morcegos. O objetivo deste estudo foi avaliar as reservas energéticas do morcego insetívoro Molossus molossus ao longo das estações anuais associadas ao seu ciclo reprodutivo. Foram coletados machos adultos durante as quatro estações anuais na cidade de Viçosa -MG, Brasil. Para as análises metabólicas foram coletados tecidos e sangue, e os testículos foram removidos para análises histológicas e morfométricas. Os resultados mostram que as concentrações de glicogênio no fígado e músculo peitoral foram significativamente menores no inverno. O índice adiposo foi significativamente maior no outono em relação ao inverno e primavera. Os túbulos seminíferos apresentaram maiores diâmetros nos animais coletados no outono e inverno, indicando um maior investimento na produção espermática durante estas estações. A porcentagem de células de Leydig foi maior no verão em comparação com outono e inverno. Sugere-se que M. molossus apresenta um tipo de reprodução sazonal com dois picos de atividade testicular: uma no outono, com maior produção de espermatozóides (espermatogênese), e outra no verão, com maior produção de hormônio (esteroidogênese). O padrão metabólico pode estar associado a eventos reprodutivos, especialmente devido ao maior armazenamento de gordura observado no outono, que coincide com o desenvolvimento dos túbulos seminíferos.Palavras-chave: e...

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“…All the following measurements were made according to previous studies Monteiro et al 2008;(Leite et al 2010;Predes et al 2010;Costa et al 2011;Freitas et al 2011). The images were captured with an Olympus-AX70 light microscope and the morphometrical and stereological analyses were performed using Image-Pro Plus 4 software.…”

Section: Morphometry and Stereologymentioning

confidence: 99%

“…The tunica albuginea was removed from only one testis to obtain the weight of testicular parenchyma and albuginea. The gonadosomatic index (GSI) was calculated as a percentage of body mass represented by the testes [GSI = Testes weight x 100 / body weight] (Monteiro et al 2008;Costa et al 2011;Gomes et al 2011) Preparation of tissue for light microscopy One testis was dissected and fixed in 10% formalin. Testicular fragments were dehydrated and embedded in hydroxyethyl methacrylate (Historesin ® , Leica).…”

Section: Euthanasia Tissue Collection and Biometrymentioning

confidence: 99%

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Colon cancer and swimming exercise: effect on wistar rat testes

Freitas

Natali

Lunz

et al. 2013

Braz. arch. biol. technol.

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Histomorphometric evaluation of the neotropical brown brocket deer Mazama gouazoubira testis, with an emphasis on cell population indexes of spermatogenic yield

Cited by 36 publications

References 41 publications

Histomorphometric study on testes in rams fed with linseed oil rich in omega-3 and -6 polyunsaturated fatty acids

Histomorphometric study on testes in rams fed with linseed oil rich in omega-3 and -6 polyunsaturated fatty acids

Seasonal variation of energy reserves and reproduction in neotropical free-tailed bats Molossus molossus (Chiroptera: Molossidae)

Colon cancer and swimming exercise: effect on wistar rat testes

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