Influence of season and age on sexual maturation parameters of Texel, Suffolk and Ile-de-France rams

Mandiki, S.N.M.; Derycke, G.; Bister, Jean‐Loup; Paquay, R.

doi:10.1016/s0921-4488(97)00073-4

Cited by 63 publications

(44 citation statements)

References 17 publications

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“…A significant effect of season on SC of Pampinta and Corriedale rams was observed in the current study. This is in agreement with the results of Dufour et al (1984), Mandiki et al (1998a) and Kafi et al (2004), who demonstrated seasonal variation in SC in Suffolk, Texel and Persian Karakul rams, respectively. Seasonal fluctuation in testicular size has been shown to be under the influence of serum luteinizing hormone (LH) concentration (Schanbacher & Lunstra, 1976) and specially submitted to the frequency of LH pulses (Sanford et al, 1977).…”

Section: Discussionsupporting

confidence: 93%

“…The highest values were recorded in winter and spring, with lower values in the summer and autumn seasons. This is consistent with the results obtained in both Suffolk and Ile-de-France rams (Mandiki et al, 1998a). On the other hand, it was also observed that the percentage of abnormal spermatozoa was higher during spring and summer, while winter was a transitional period in Greek breeds (Karagiannidis et al, 2000).…”

Section: Reproductive Characteristics Of Argentine Pampita and Corriesupporting

confidence: 92%

“…For the two breeds, live weight increased continuously from winter to summer and Pampinta rams were heavier than Corriedale rams throughout the experiment. Similarly, a decrease in live weight in winter was found in Suffolk rams (Mandiki et al, 1998a). However, Gastel et al (1995) observed that the body weight did not decrease during the winter in Corriedale rams (15 to 18 months of age) in Uruguay.…”

Section: Discussionmentioning

confidence: 82%

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Seasonal variation in sexual behavior, plasma testosterone and semen characteristics of Argentine Pampinta and Corriedale rams

Aller

Aguilar

Vera

et al. 2012

Span. j. agric. res.

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Five Argentine Pampinta (dairy breed) and six Corriedale (dual-purpose breed) adult rams were used to study the effect of season on sexual behavior, plasma testosterone (T) and semen characteristics for a period of 1 year. Scrotal circumference (SC) and T concentrations were determined at 2-week intervals. Each ram was exposed monthly to three ovariectomized ewes in one 20-min test and the total number of mounts and successful matings were recorded. Semen collection was attempted from each ram twice weekly for six consecutive weeks during each season. In both breeds, SC varied seasonally showing the lowest mean values during winter and spring and in the Corriedale rams (32.8 ± 0.3 cm) was smaller (p < 0.05) than in Pampinta rams (34.4 ± 0.4 cm). No difference (p > 0.05) was recorded in T concentration between breeds and both breeds reached a peak in summer and autumn. Number of matings showed the maximal values in autumn in both breeds. Season had no significant effect on mass motility, sperm concentration and percentage of live sperm. Semen volume, percentage of progressive motility and total sperm per ejaculate were higher during summer and autumn than in other seasons of the year. Pampinta rams had the highest values (p < 0.05) of sperm concentration, total sperm per ejaculate and percentage of abnormal sperm. Results of this study show that sexual behavior, SC and T concentrations exhibit seasonal variation in Pampinta and Corriedale rams and that semen of superior quantity and quality is especially collected in both breeds during the summer and autumn.Additional key words: hormone, rams; semen quality; serving capacity. Resumen Variación estacional en el comportamiento sexual, testosterona plasmática y características seminales de carneros Pampinta Argentina y CorriedaleCinco carneros adultos Pampinta Argentina (raza lechera) y seis Corriedale (raza doble propósito) fueron utilizados para estudiar el efecto de la estación del año sobre el comportamiento sexual, testosterona plasmática (T) y caracterís-ticas seminales. La circunferencia escrotal (CE) y las concentraciones de T fueron determinadas cada dos semanas. Mensualmente, cada carnero fue expuesto a tres ovejas ovariectomizadas en una prueba de 20 min y se registró el número total de montas y apareamientos. La colección del semen fue intentada dos veces por semana por seis semanas consecutivas durante cada estación. En ambas razas los menores valores de CE fueron observados en invierno y primavera (Corriedale = 32,8 ± 0,3 cm; Pampinta = 34,4 ± 0,4 cm; p < 0,05). La concentración de T alcanzó un máximo en verano y otoño y el número de apareamientos fue máximo en otoño. La estación no tuvo efecto (p > 0,05) sobre la motilidad masal, la concentración espermática y el porcentaje de espermatozoides vivos. El volumen del eyaculado, el porcentaje de motilidad progresiva y el número total de espermatozoides fueron mayores en el verano y otoño. La raza del carnero tuvo un efecto (p < 0,05) sobre la concentración espermática, el número total de espermato...

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Section: Discussionsupporting

confidence: 93%

Section: Reproductive Characteristics Of Argentine Pampita and Corriesupporting

confidence: 92%

Section: Discussionmentioning

confidence: 82%

See 1 more Smart Citation

Seasonal variation in sexual behavior, plasma testosterone and semen characteristics of Argentine Pampinta and Corriedale rams

Aller

Aguilar

Vera

et al. 2012

Span. j. agric. res.

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“…Mandiki et al (1998), reported better spermatic quality in 3-year-old lambs than in 2-year-old lamb. However, several conditions can weaken sperm quality and homeostasis in the reproductive tract, such as nutritional disorders, thermal stress, infectious and parasitic diseases and advanced age (MOREIRA, MOURA;ARAUJO, 2001;ARMENGOL et al, 2015).…”

Section: Introductionmentioning

confidence: 84%

Effect of Flunixin Meglumine administration on seminal characteristics of male sheep and goat

Neto

Rodrigues

Leles

et al. 2017

SCA

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Testicular degeneration is a multifactorial process increasing the concentration of prostaglandins in seminal plasma. Both increase and decrease of these hormones tend to promote loss of seminal quality. Flunixin meglumine is a potent anti-inflammatory drug capable of modulating the production of prostaglandins and is widely used in female reproduction. However, it is rarely used in males with the same objective. Therefore, this study aimed to evaluate the effects of this drug on seminal quality of male lambs and goats with spermatic characteristics unfavorable for reproduction. To this end, a total of 15 breeding animals were evaluated, of which six goats and four sheep with poor seminal quality were selected according to the criteria established by the Brazilian College of Animal Reproduction (CBRA). Three semen samples were collected from each animal. Then, the flunixin meglumine treatment was initiated and ejaculates were collected at two different periods after the drug was administered (from day 21 until day 35 and from day 49 to day 63). Macroscopic and microscopic parameters were assessed in semen samples and scrotal circumference and percentages of sperm pathologies were measured and compared between the three periods. Data with normal distribution were analyzed using ANOVA at 5% probability, and comparisons between periods within the same species were performed using the Tukey test. An improvement was observed in the analyses of mass motility, percentage motility, and sperm vigor. Scrotal circumference had no variation. Concerning sperm pathologies, an increase in the number of normal spermatozoids was observed due to a significant reduction in minor and major defects, and the latter remained low even after the treatment was finished. Therefore, flunixin meglumine presented beneficial effects on seminal parameters of male goats and lamb with unfavorable spermatic characteristics. These findings indicate this drug may be used in the treating of males with testicular injuries or of breeders with reduced seminal quality due to advanced age. Key words: Andrology. Animal Reproduction. Prostaglandins. Seminal Quality. ResumoA degeneração testicular é um processo multifatorial que leva ao aumento das prostaglandinas no plasma do ejaculado, sendo que tanto seu acréscimo quanto a redução baixam a qualidade seminal. A Flunixina Meglumine é um potente anti-inflamatório, capaz de modular a produção de prostaglandinas, amplamente difundido na reprodução de fêmeas, mas pouco utilizado em machos para esse fim. Por isso, esse trabalho buscou avaliar o efeito deste fármaco sobre a qualidade seminal de machos ovinos e caprinos que apresentem quadro espermático desfavorável à reprodução. Para tanto, um total de 15 reprodutores pertencentes à Universidade Federal do Ceará foram avaliados, dos quais foram selecionados seis bodes e quatro carneiros com sêmen de baixa qualidade, segundo os critérios do Colégio Brasileiro de Reprodução Animal (CBRA). Foram realizadas três colheitas prévias de cada animal, aplicado o ...

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“…To make maximum use of a good male efforts are made t o mate a s many females a s possible. However, care has got to be taken t o see t h a t more frequent use may not adversely affect the semen characteristics of rams (Mandiki et al, 1998;Kaya et al, 2002; …”

Section: Introductionmentioning

confidence: 99%

Effect of Frequent Ejaculation on Live Weight and Sperm Characteristics in Norduz Lambs

Bingöl

Yılmaz

Cengiz

et al. 2006

Journal of Applied Animal Research

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Influence of season and age on sexual maturation parameters of Texel, Suffolk and Ile-de-France rams

Cited by 63 publications

References 17 publications

Seasonal variation in sexual behavior, plasma testosterone and semen characteristics of Argentine Pampinta and Corriedale rams

Seasonal variation in sexual behavior, plasma testosterone and semen characteristics of Argentine Pampinta and Corriedale rams

Effect of Flunixin Meglumine administration on seminal characteristics of male sheep and goat

Effect of Frequent Ejaculation on Live Weight and Sperm Characteristics in Norduz Lambs

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