Effect of number of motile sperms inseminated on reproductive performance of rabbit does

Castellini, Cesare; Lattaioli, P.

doi:10.1016/s0378-4320(99)00051-2

Cited by 50 publications

(52 citation statements)

References 8 publications

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“…The motility rate observed in this experiment was lower than the motility rate reported by other authors when working with fresh semen (usually higher than 70% of motile sperm [32,34,35]). This could have been due to the high dilution rate used in this work (dilution 1:50) to measure the motility parameters with the CASA system; [36] observed a pronounced reduction in motility parameters from rabbit spermatozoa when seminal plasma had been diluted more than 30 fold.…”

Section: Discussioncontrasting

confidence: 81%

Rearing management of rabbit males selected by high growth rate: the effect of diet and season on semen characteristics

et al. 2004

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-A total of sixty-six young males were used to evaluate the effect of low (L), medium (M) and high (H) concentrations of dietary digestible energy received during the rearing seasons (autumn and spring) on the performance and main semen characteristics of males for artificial insemination selected by a high growth rate. Males reared during the spring season presented a significantly higher weight at weaning than those reared during the autumn season (P < 0.001), and these differences were maintained until the end of the trial. The requirements of the males were easily covered as a general rule. In the autumn group, the males were unable to intake the digestible protein recommended only during their 3rd month of life, especially with low concentrate diets (P < 0.05). H males showed higher semen concentration and production during the autumn season, while L males showed a higher semen concentration and production than M males during the spring season, the H group showed intermediate values (P < 0.001). Males reared during the spring season showed significantly higher values of sperm concentration (P < 0.01) and production (P < 0.01). H males presented a lower percentage of spermatozoa with cytoplasmic droplets than the L group (P < 0.05) and the lowest values for sperm abnormalities during the autumn season, while the L group presented higher values for percentage abnormalities, especially during the last month controlled (P < 0.05). As a general rule, the main motility parameters controlled were not affected by the rearing diet received nor the season. These results seem to indicate that the management of rabbit males during the growing and rearing periods seem to significantly affect their subsequent performance and semen production.rabbit males / rearing / semen characteristics / dietary energy / season

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Section: Discussioncontrasting

confidence: 81%

Rearing management of rabbit males selected by high growth rate: the effect of diet and season on semen characteristics

et al. 2004

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“…However, it increased by 7.8 percentage points when the number of motile sperms in the dose increased from 11 to 38 × 10 6 sperms. This result, using homospermy, is consistent with the findings of Castellini and Lattaioli (1999). Moreover, More O'Ferrall and Meacham (1968), Bencheikh (1995), Brun et al (2002) and Tussel et al (2011) reported a significant negative association between pH and fertility.…”

Section: Means and Variations Of Reproductive Performancessupporting

confidence: 86%

Relationships between rabbit semen characteristics and fertilising ability after insemination

Theau-Clément

Ailloud

Sánchez

et al. 2016

Animal

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This study aimed to analyse the relationship between rabbit semen characteristics and semen fertilising ability after insemination, which is generally found to be weak. Our hypothesis was that using high semen dilutions (1 : 19), non-oestrus-stimulated does, and homospermic inseminations would make it easier to predict semen fertilising ability. Semen characteristics were evaluated on 275 ejaculates of 128 INRA1001 bucks, distributed into five successive batches. A total of 1970 inseminations were performed. The continuous semen variables were subdivided into three classes of similar size to account for any non-linear relationship between semen characteristics and fertilising ability. Mass motility was divided into two classes according to the presence or absence of waves under microscope observation. Libido, the presence or absence of gel, volume, percentage of progressive sperms, curvilinear velocity, beat frequency of the flagellum, and straightness and linearity of sperm movement did not affect fertility, prolificacy or productivity. It was confirmed that mass motility, estimated by visual observation under the microscope, significantly influenced fertility as well as the percentage of motile and of rapid sperms, and the amplitude of lateral head displacement, estimated by a computer-assisted semen analysis system. To a lesser extent, the percentage of motile cells and of rapid cells significantly influenced prolificacy. Consequently, mass motility and the percentage of motile cells significantly influenced rabbit doe productivity (+1 live births/AI when the semen showed at least a beginning of wave movement, or when the percentage of motile cells was >84%). Interestingly, a gain of 1.5 rabbits was observed when the percentage of rapid cells changed from 64% to 79%, whereas productivity significantly dropped beyond 83% of rapid cells, reflecting a non-linear relationship.Keywords: rabbit, semen characteristics, fertilising ability ImplicationsThe relationship between rabbit semen characteristics and semen fertilising ability is generally found to be weak. Nevertheless, our results obtained using a high dilution and homospermic inseminations on rabbit does not stimulated for oestrus show that a simple selection on mass motility allows increasing productivity by one rabbit born alive per insemination, when the semen shows at least a beginning of wave movement. Moreover, computer-assisted semen evaluation provides additional markers of fertilising ability (such as the percentage of rapid sperms, and the amplitude of lateral head displacement) possibly non-linearly related to fertilising ability.

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“…AI was performed in the morning immediately after milking by inseminating 0.3 mL of diluted fresh semen, containing about 10 million sperms [12]. No hormonal synchronisation was done.…”

Section: Measurementmentioning

confidence: 99%

Long term effect of post-weaning rhythm on the body fat and performance of rabbit doe

Castellini¹,

Bosco²,

Cardinali³

2006

Reprod. Nutr. Dev.

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-Reproductive protocols based on standard (Control: 11 days post-partum) or extended rhythm (PW: post-weaning at 27 days post-partum) were compared. Two groups of fifty 19-weekold New Zealand White females were inseminated for seven consecutive cycles. The kits were weaned at 26 days. On the day of AI, all the does were submitted to ultrasound scanning of the perirenal regions to measure fat thickness. The fertility rate and several indexes of efficiency were calculated. Fat thickness, estimated perirenal fat and live weight were higher in PW does. The does submitted to post-weaning rhythm had a higher sexual receptivity (P < 0.01), and fertility rate (P < 0.01) whereas litter size and pre-weaning mortality were not affected. Primiparous Control does showed a particularly low fertility rate; the value increased successively but was always lower than in PW does. PW rhythm in comparison with the standard one seemed more adapted to doe reproductive physiology even if there was a lower production (35.0 vs. 38.8 rabbit sold/year) and risk of fatness (18% of multiparous does). rabbit doe / fertility / rhythm of insemination

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Effect of number of motile sperms inseminated on reproductive performance of rabbit does

Cited by 50 publications

References 8 publications

Rearing management of rabbit males selected by high growth rate: the effect of diet and season on semen characteristics

Rearing management of rabbit males selected by high growth rate: the effect of diet and season on semen characteristics

Relationships between rabbit semen characteristics and fertilising ability after insemination

Long term effect of post-weaning rhythm on the body fat and performance of rabbit doe

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