Biometria testicular de ovinos Pantaneiros alimentados com níveis crescentes de glicerina bruta na dieta

Santos, Rodrigo Andreo; Vargas, Fernando Miranda de; Seno, Leonardo de Oliveira; Orrico, Ana Carolina Amorim; Filho, Flavio Duilio Eugênio Bottini; Senegalhe, Franciane Barbiéri Dias; Cansian, Karine; Longo, Maíza Leopoldina

doi:10.1590/s1519-99402016000200018

Cited by 4 publications

(4 citation statements)

References 15 publications

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“…In the present study the observed measurements were lower in both Santa Ines and crossbred. This fact may be explained due to the fact that age and weight of the animals were lower than those studied by the authors, and because the scrotum-testicular biometry has a positive correlation with age and body weight of the animals (Silva et al 2000, Dias et al 2003, Boligon et al 2007, Yokoo et al 2007, Santos et al 2016. Moreira et al (2001) studying sheep Santa Ines submitted to scrotal insulation found that changes in the scrotum--testicular biometry are significant from eight days after the insulation end and the scrotal circumference measures returned to baseline after 50 days of treatment.…”

Section: Resultsmentioning

confidence: 88%

Effect of racial crossing on the scrotum-testicular biometry in sheep submitted to scrotal insulation

et al. 2017

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The objective of this study was to evaluate the effect of the racial crossing on scrotum-testicular biometric characteristics of four sheep Santa Ines and four crossbred (Santa Ines x Dorper) submitted to scrotal insulation, following the return of these characteristics to values previously reported. For this, two measurements were made regarding the scrotal circumference (SC), length (L) and testicular width (W) before treatments. The testicular volume (V) was calculated by the formula V=2 [(r2) x π x H]. The pouches were made with double-layer plastic, internally lined with cotton, and fixed around the spermatic funiculus and scrotum with adhesive tape and bandage remaining in this position for seven days. Measurements were made every seven days, totaling 15 measurements throughout the experiment. The data were submitted to analysis of variance (ANOVA) to a randomized block design with two blocks, 15 treatments and four replications. The variables analyzed were subjected to Dunnett test at 5% probability, to compare the values obtained before and after insulation. For comparison between the breeds, the variables were submitted to Tukey test at 5% probability. All animals studied suffered significant influence (P<0.05) after scrotal insulation, but Santa Ines returned to the values previously observed in a shorter period than the crossbred. In summary, sheep Santa Ines have a higher resistance than crossbred animals when subjected to thermal stress induced by scrotal insulation.

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Section: Resultsmentioning

confidence: 88%

Effect of racial crossing on the scrotum-testicular biometry in sheep submitted to scrotal insulation

et al. 2017

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“…We did not measure scrotal circumference in the present study. However, a strong correlation exists between the weight of testicles/scrotal sac and scrotal circumference (0.60; Santos et al, 2016a). Thus, animals with heavier testicles would likely have larger scrotal circumference.…”

Section: Discussionmentioning

confidence: 99%

Residual intake and gain for the evaluation of performance, non-carcass components, and carcass characteristics of confined crossbred Texel lambs

et al. 2019

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We evaluated performance, non-carcass components, and carcass characteristics of crossbred Texel lambs in different categories of residual intake and gain (RIG). We assessed 77 crossbred (¼ Pantaneira and ¾ Texel) non-castrated animals in two study phases. The first phase included 47 lambs with an initial average weight of 29.9±5.5 kg, and the second phase included 30 lambs with initial average weight of 22.4±3.3 kg. Dry matter intake (DMI) and average daily gain (ADG) were evaluated for 70 days. Animals were divided into three groups in terms of efficiency: efficient (high RIG), intermediate (medium RIG), or inefficient (low RIG), based on the standard deviation of the mean for the RIG variable. We measured the yield of noncarcass components, carcass characteristics, and yield of meat cuts. Efficiency group had no association with DMI, nor with initial and final body weights of the animals. The ADG of efficient (0.310 kg day −1 ) and intermediate (0.290 kg day −1 ) animals was greater than observed in inefficient (0.260 kg day −1 ) animals. Lambs in the efficient and intermediate groups had significantly higher levels of all efficiency indicators evaluated. Efficient and intermediate animals yielded significantly more wool/skin in comparison with lambs in the inefficient group. Animals with high RIG also had lower relative weight of testicles/scrotal sac in comparison with inefficient animals. Fat deposition in the omentum and mesentery as well as total fat were decreased in efficient animals. No significant differences occurred among groups regarding carcass characteristics and yield of meat cuts. The RIG index allows for the identification of lambs with higher growth rates and greater wool/skin yield and lower proportion of visceral fat.

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“…No entanto, não observamos efeito (P>0,05) da inclusão da glicerina bruta sobre o diâmetro ou altura do epitélio dos túbulos seminíferos do testículo de bovinos. Resultado similar foi relatado por Santos et al (2016) que reportaram ausência de efeito da glicerina bruta sobre diâmetro ou altura do epitélio dos túbulos seminíferos no testículo de ovinos O glicerol é conhecido pelo seu efeito esclerosante (formação de tecido cicatricial conjuntivo no parênquima tissular) quando aplicado diretamente nos testículos de mamíferos (Lopes e Silva, 2014). Aqui os animais consumiram o máximo de 1 kg de glicerina bruta e 440 g de glicerol (considerando teor de 44% de glicerol na glicerina).…”

Section: Discussionunclassified

“…O uso de glicerina bruta até 24% da matéria seca da dieta parece não provocar lesões histopatológicas no sistema nervoso central, rúmen, fígado, rins e intestinos de novilhos (Leão et al, 2012). Em relação ao sistema reprodutivo, a inclusão de até 7,5 % de glicerina bruta na dieta de machos ovinos parece segura, por não provocar lesões histopatológicas nos testículos de ovinos (Santos et al, 2016). No entanto, estudos avaliando a morfologia e patologia testicular de bovinos alimentados com níveis mais elevados de glicerina bruta são escassos na literatura.…”

Section: Introductionunclassified

Análise espermática e testicular de touros Nelore suplementados com glicerina bruta

et al. 2019

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Objetivou-se avaliar os efeitos da inclusão de glicerina bruta sobre a morfologia testicular de touros Nelore. Para isso, foram utilizados 35 bovinos com peso corporal inicial de 428,0 ± 32,11 kg e aproximadamente 22 meses, distribuídos em delineamento inteiramente casualizado, com cinco tratamentos e sete repetições, suplementados durante 88 dias, com 14 dias de adaptação. Os tratamentos consistiram na inclusão de glicerina de baixa pureza nos níveis de 0, 3, 6, 9 e 12% da matéria seca total dos suplementos. Foi realizado uma coleta de sêmen no 88º dia experimental, posteriormente os animais foram pesados, abatidos e tiveram os testículos coletados, pesados e amostrados. A inclusão da glicerina bruta influenciou a motilidade e o vigor espermático (P<0,05). O peso corporal ao abate e perímetro escrotal não foram influenciados (P>0,05) pelos níveis de glicerina. Observou-se comportamento quadrático (P<0,05) para o índice Leydigossomático, com ponto de mínima de 6,66% e para a proporção volumétrica das células de Leydig (CL), com ponto de mínima de 5,41%. Não foram observadas alterações histopatológicas testiculares nos bovinos. A glicerina de baixa pureza promove modificações na motilidade e vigor espermático, no índice leydigossomático e no volume das células de Leydig. Portanto, não se recomenda a adição de glicerina bruta no suplemento de touros em atividade reprodutiva.

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Biometria testicular de ovinos Pantaneiros alimentados com níveis crescentes de glicerina bruta na dieta

Cited by 4 publications

References 15 publications

Effect of racial crossing on the scrotum-testicular biometry in sheep submitted to scrotal insulation

Effect of racial crossing on the scrotum-testicular biometry in sheep submitted to scrotal insulation

Residual intake and gain for the evaluation of performance, non-carcass components, and carcass characteristics of confined crossbred Texel lambs

Análise espermática e testicular de touros Nelore suplementados com glicerina bruta

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