Effects of age and environmental factors on semen production and semen quality of Austrian Simmental bulls

Fuerst-Waltl, Birgit; Schwarzenbacher, Hermann; Perner, Christa; Sölkner, Johann

doi:10.1016/j.anireprosci.2005.09.002

Cited by 128 publications

(112 citation statements)

References 12 publications

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“…Age-related decline in semen quality such as sperm motility, the percentage of live and morphologically normal spermatozoa is well documented in Nili-Ravi buffalo (Ahmad et al 1987;Younis et al 1998). Similar agerelated adverse changes in semen quality were observed in Kundhi and beef bulls (Fuerst-Waltl et al 2006;Kiani et al 2014). Moreover, a progressive decline in semen quality and fertility of aged men (Eskenazi et al 2003) suggests that lipid peroxidation is part of age-related oxidative stress and affects semen quality (Beckman and Ames 1998).…”

Section: Introductionsupporting

confidence: 49%

Effect of age on lipid peroxidation of fresh and frozen-thawed semen of Nili-Ravi buffalo bulls

Ahmed

Khan

Ahmad

et al. 2018

Italian Journal of Animal Science

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Buffalo bull spermatozoa are rich in polyunsaturated fatty acids and are prone to lipid peroxidation. We hypothesised that lipid peroxidation in buffalo bull semen will increase with age and will affect the semen quality. The objective was to compare malondialdehyde (MDA) concentration and the quality of fresh and frozen-thawed semen between aged (13.6 ± 1.0 years; n ¼ 3) and young (3.4 ± 0.3 years; n ¼ 3) Nili-Ravi bulls. The concentration of MDA did not differ (p >.05) between aged vs. young bulls in fresh (2.3 ± 0.2 vs. 2.9 ± 0.7 nmol mL À1 ), frozen-thawed (53.1 ± 2.8 vs. 48.4 ± 2.6 nmol mL À1 ) semen and seminal plasma (5.71 ± 0.97 vs. 5.19 ± 1.36 nmol mL À1 ), respectively. In fresh semen, sperm motility and total concentration did not differ (p > .05) between aged and young bulls. The volume of fresh semen increased (p > .05) while sperm viability and DNA integrity decreased (p < .05) in aged vs. young bulls. In frozen-thawed semen, sperm motility, viability and DNA integrity decreased (p < .05) in aged vs. young bulls. In frozen-thawed vs. fresh semen, MDA level increased within young (48.4 ± 2.6 vs. 2.3 ± 0.2 nmol mL À1 ) and aged bulls (53.1 ± 2.8 vs. 2.9 ± 0.7 nmol mL À1 ). Conversely, sperm motility and viability decreased (p < .05) within the age groups between fresh and frozen-thawed semen.In conclusion, (1) lipid peroxidation (MDA) does not increase due to age; however, it is negatively associated with semen quality and (2) cryopreservation steps up lipid peroxidation irrespective of age and deteriorates semen quality of Nili-Ravi bulls.ARTICLE HISTORY

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Section: Introductionsupporting

confidence: 49%

Effect of age on lipid peroxidation of fresh and frozen-thawed semen of Nili-Ravi buffalo bulls

Ahmed

Khan

Ahmad

et al. 2018

Italian Journal of Animal Science

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“…Ambient temperature between 5 °C and 15 °C is optimal for semen production (19). Paying close attention to body condition and providing bedding such as hay and shelter from wind and weather during the winter months helps prevent losses of bull breeding capability.…”

Section: Physiological Determinants Of Bull Fertilitymentioning

confidence: 99%

Molecular, cellular, and physiological determinants of bull fertility

Parisi¹,

Thompson²,

Kaya³

et al. 2014

Turk J Vet Anim Sci

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Bull fertility, defined as the ability of the spermatozoon to fertilize and activate the ovum and then support embryonic and even fetal development, is a crucial factor influencing animal reproduction and production efficiency. Despite significant influences of fertility on herd genetic improvement and efficient cattle production, the mechanisms regulating this phenotype and reliable biomarkers associated with bull fertility are poorly defined. Specifically, there is a broad lack of knowledge in bull fertility. In this paper, bull fertility is reviewed within the context of animal systems physiology, and system biology markers associated with bull fertility are provided. This mini-review is intended to be a useful resource for students, animal producers, and the general public to help understand and appreciate this economically important trait.

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“…Vários trabalhos mostraram que o insulto térmico dos testículos resulta em diminuição da produção e qualidade espermática (BRITO et al, 2002;Fernandes et al, 2008). Adicionalmente, Fuerst-Waltl et al (2006) observaram, em touros da raça Simental criados na Austrália, que a temperatura ambiental entre 5,0 e 15,0 o C foi a que apresentou melhores resultados na produção seminal e Viu (2009) relatou tendência ao aumento das patologias espermáticas de touros Nelore andrologicamente avaliados em épocas de elevada temperatura ambiental. Kastelic et al (2001) encontraram correlação positiva entre a temperatura da superfície da bolsa escrotal e a temperatura testicular.…”

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“…Dentre as principais causas de degeneração testicular nos animais criados em condições tropicais destacam-se as altas temperaturas ambientais (FUERST-WALTL et al, 2006), causando o aumento do metabolismo do tecido espermático e a consequente hipóxia do parênquima testicular, além da diminuição dos receptores de FSH, levando à redução da produção e qualidade espermática (BRITO et al, 2002;KOIVISTO et al, 2008).…”

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HISTOMETRIA E FORMA TESTICULARES ASSOCIADAS À QUALIDADE SEMINAL EM MACHOS NELORE (Bos taurus indicus) CRIADOS EXTENSIVAMENTE NO SUDOESTE DE GOIÁS

Ferraz¹,

Viu²,

Filho³

et al. 2014

AVS

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RESUMO:Desenvolveu-se este estudo com o intuito de verificar as associações entre a forma dos testículos, as alterações histológicas no parênquima testicular e a qualidade seminal. Quarenta e dois animais, entre 30 e 36 meses de idade e que seriam castrados para terminação, tiveram o sêmen coletado. Amostras de três porções (proximal, intermediária e distal) de seus testículos foram colhidas e fixadas. Realizou-se a avaliação andrológica destes animais e a preparação de lâminas histológicas para avaliação do parênquima testicular. Foram avaliados: forma testicular; movimento massal (MMAS); vigor espermático (VIG); motilidade individual progressiva (MOT); concentração espermática (CONC); defeitos espermáticos maiores (DEFMAI), menores (DEFMEN) e totais (DEFTOT); distância média entre os túbulos seminíferos (DISTMED); espessura média do epitélio seminífero (ESPMED); e percentagem média de colágeno intersticial (COLMED). Animais com testículo classificado como longo apresentaram menor DISTMED, maior ESPMED e menor COLMED (P<0,05), além de valores superiores quanto aos aspectos físicos e morfológicos do ejaculado. A DISTMED foi menor e a ESPMED foi maior na porção mais distal do testículo (P<0,05). As correlações de DISTMED, ESPMED e COLMED com os DEFTOT foram, respectivamente, 0,51; -0,39; e 0,29 (P<0,001). Assim, pode-se concluir que: testículos de forma alongada sofrem menos lesões teciduais no parênquima testicular, apresentando maior produção e melhor qualidade seminal; as porções distais dos testículos demonstram menos lesões ao tecido espermático; e as menores distâncias entre os túbulos seminíferos, a maior espessura do epitélio seminífero e a menor concentração de colágeno intersticial nos testículos estão relacionadas à melhoria da qualidade seminal. Palavras-chave: andrologia; bovino; reprodução; sêmen; zebuíno TESTICULAR HISTOMETRY AND SHAPE ASSOCIATED WITH SEMINAL QUALITY IN NELLORE (Bos taurus indicus) MALES EXTENSIVELY RAISED IN SOUTHWEST OF GOIÁSABSTRACT: This study was developed to verify the associations between the shape of the testicles, the histological changes in testicular parenchyma and seminal quality. Forty two animals, between 30 and 36 months of age who were castrated for termination, had the semen collected. Samples of three portions (proximal, middle, and distal) of the testes were harvested and fixed. It was do breading soundness evaluation of these animals and preparation of slides for histological evaluation of testicular parenchyma. Were evaluated: testicular form; grass movement (MMAS); spermatic vigor (VIG); individual progressive motility (MOT); sperm concentration (CONC); major (DEFMAI), lower (DEFMEN) and total (DEFTOT) sperm defects; average distance between the seminiferous tubules (DISTMED); the average thickness of the seminiferous epithelium (ESPMED); and average percentage of interstitial collagen (COLMED). Animals with testicular classified as long had lower DISTMED, higher ESPMED, lower COLMED, and higher values regarding physical and morphological semen. The DISTMED wa...

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Effects of age and environmental factors on semen production and semen quality of Austrian Simmental bulls

Cited by 128 publications

References 12 publications

Effect of age on lipid peroxidation of fresh and frozen-thawed semen of Nili-Ravi buffalo bulls

Effect of age on lipid peroxidation of fresh and frozen-thawed semen of Nili-Ravi buffalo bulls

Molecular, cellular, and physiological determinants of bull fertility

HISTOMETRIA E FORMA TESTICULARES ASSOCIADAS À QUALIDADE SEMINAL EM MACHOS NELORE (Bos taurus indicus) CRIADOS EXTENSIVAMENTE NO SUDOESTE DE GOIÁS

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