Flushing or doe relocation as biostimulation methods for improvement of sexual behaviour and performance of multiparous rabbit doe after a summer resting period

Manal, A.F.

doi:10.4995/wrs.2010.7744

Cited by 6 publications

(6 citation statements)

References 21 publications

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“…The KR (on average 70.1 %) was consequently 2.1 % lower. In the given analysis, the KR was also lower than that reported by Castellini et al (2010), Manal (2010), Gerencsér et al (2011), Coutelet (2015, and Theau-Clément et al (2016). Furthermore, the LS was relatively low compared with results from the literature concerning the breeding goals of modern hybrid rabbit strains (Coutelet, 2015;Maertens and Buys, 2015;Maertens and De Bie, 2017).…”

Section: Discussioncontrasting

confidence: 52%

“…Schüddemage (1999), Carluccio et al (2004) and Coutelet (2015) found respective pregnancy rates between 64 % and more than 80 % and an average LS of between 8.1 and 10.7 total kits born in different breeds. In practice, the KR is lower than the conception rate and varies widely between 29 % and 90 % (Dimitrova et al, 2009;Castellini et al, 2010;Manal, 2010;Gerencsér et al, 2011;Coutelet, 2015;Theau-Clément et al, 2016). It has been previously shown that housing and feeding are factors which influence reproductive performance.…”

Section: Introductionmentioning

confidence: 99%

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A new parameter describing fertility in rabbits at the farm level: the kit index

Hoy¹

2018

Arch. Anim. Breed.

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The kit index (KI) combines the kindling rate (KR) and the average litter size (LS) per group of does, per breeding round, per year, or per farm and represents the number of total or live-born kits per 100 inseminated does. The KR is the percentage of kindlings per number of inseminated does. Mathematically, the KI is the product of the KR multiplied by the average LS. The KI was calculated on the basis of 12 730 inseminated does and 89 864 live-born kits from one rabbit farm during a 25-month period from 2015 to 2017. The average KR was 70.1 ± 9.1 % with a minimum (per breeding round) of 35.4 % and a maximum of 90.8 %. The average LS of total kits born was 9.16 ± 0.91, whilst the average litter size of live-born kits was 8.87 ± 0.90. The KI of total kits born was calculated to be 649± 121 kits per 100 inseminated does (min of 332, max of 971), while the KI of live-born kits ranged between 326 and 944 kits per 100 inseminated does (mean of 626 ± 122). The KI is a normally distributed parameter with respect to both the total kits born and the live-born kits per 100 inseminated does. All three parameters (KR, LS, and KI) were characterized by large variations from week to week with a tendency toward a reduction in the summer months. No difference was found between the two housing units, but large differences were found between the two genetic strains used on the given farm. Therefore, it can be concluded that the KI is able to characterize the complex fertility situation on the given rabbit farm. The KI can be used to demonstrate and to solve problems regarding artificial insemination, in addition to general issues with insemination management.

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Section: Discussioncontrasting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

A new parameter describing fertility in rabbits at the farm level: the kit index

Hoy¹

2018

Arch. Anim. Breed.

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“…Generally, previous works reported a direct correlation of oestradiol concentration in plasma with vulva color and receptivity of rabbit females (Ubilla and Rebollar, 1995, Rodriguez de Lara and Fallas, 1999and Manal, 2010. Our results also indicated that hormonal eCG treatment markedly (P<0.05) increased receptivity of females to 82% compared with 59% in control (data not shown) in a coincidence with significant increase in serum E 2 concentration (5.52 pg/ml for eCG vs 4.09 pg/ml for control, Figure 1).…”

Section: Discussionmentioning

confidence: 92%

EFFECT OF HORMONAL eCG TREATMENT VERSUS REARING-FASTING PROGRAM ON EMBRYO RECOVERY, REPRODUCTIVE PERFORMANCE AND HORMONAL PROFILE IN NULLIPAROUS RABBIT DOES

Mehaisen

Abbas

2014

Egyptian Journal of Animal Production

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The aim of this study was to determine the effect of hormonal eCG treatment versus rearing-fasting program on embryo recovery, reproductive performance and hormonal profile in nulliparous rabbit does. Does at 14 weeks old were randomly divided into three groups according to the estrus synchronization method before insemination; does fed ad libitum (control), does treated with subcutaneous 50IU of eCG 60 h before insemination (eCG), and does fasted 3 days per week (57% of feed ad libitum) then fed ad libitum one week before insemination (r-FP). In 23 of receptive does, serum estradiol-17β (E 2 ) and leptin concentrations were determined at the time of insemination, and then embryos were recovered post-mortem at 72h postinsemination. A total of 51 receptive does were used to analyze the reproductive performance of all groups. The sexual receptivity and number of corpora lutea significantly increased in eCG group, however, high incidence of hemorrhagic follicles were observed. A significant increase in embryo recovery and donor rates was found in r-FP group compared with control, while no differences were observed in the number of normal embryos recovered per donor doe. The rate of embryos recovered in blastocyst stage significantly decreased in eCG group when compared with r-FP or control groups. The pregnancy rate, kindling rate and number of born alive were significantly higher while gestation duration and number of stillborn were significantly lower in r-FP does than those treated with 50 IU eCG. Serum E 2 and leptin concentrations significantly increased in r-FP does in comparison with other groups. The global productivity of weaned rabbits in receptive does was significantly higher in r-FP than in eCG group. Results indicated that in conditions of this experiment, rearing-fasting program followed by one week feed flushing before the first insemination of rabbit does improves embryo recovery, reproductive performance and related hormones secretion. These results need to be confirmed in a larger scale and several reproductive cycles before recommending that method as an efficient biostimulation for estrus synchronization in nulliparous rabbit does.

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“…The present results are in accord with Martınez-Paredes et al (2012), who recommended that the introduction of a short flushing around first AI is used for good fertility rates at the 1st parturition in multiparous rabbits. Increasing litter size of does in G2 (110% NRC) may be attributed to that a short flushing period of 7 days could be good bio-stimulation technique for oestrus synchronisation and development of receptivity in multiparous constrained fed multiparous NZW rabbit does after a long break period (Manal, 2010).…”

Section: The First Experiment: the Main Effects Of Dietary Level Of Lmentioning

confidence: 99%

In Vitro Development of Vitrified Rabbit's Embryos as Affected by some Nutritional and Hormonal Treatments

Gabr

Shamiah

Elsanafawy

2020

Journal of Animal and Poultry Production

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The purpose of the study was to measure the effect of 1-nutritional stages on reproductive performance in NZW rabbit doe. Total of 21 adult NZW rabbit were divided into 3groups (n=7). In the first group does were given 100%NRC (Control,G1), In the second and third groups does were given 110(G2) or 120%(G3) from NRC for 3week before naturally mating. Weight, litter size and possibility rate at weaning and birth were recorded. 2-flushing (110% from NRC) (G1) and (superovulation, G2) using PMSG on ovarian activity, (recovery, freezability and in vitro development of rabbit embryos (n=4/group). Embryos were collected after 56h after naturally mating. Embryos freezing by vitrification and survival was assessed by in vitro culture. Results revealed that, 1-Total litter size and alive born at birth and litter size at weaning was much higher (P>0.05) in (Group2) than in other groups. 2-Mean number of corpus lutea and large follicles were much higher (P<0.05) in (Group2) than in (Group1) (8.5 and 6.25) also (6.25 and 4.5), respectively. Survival rate and normal embryos post-vitrification in (Group1) was higher than in (Group2) by 1.48% too 6.99% respectively. The percentage of hatched blastocyst stage in (Group1) was significantly (P<0.05) higher than in (Group2) (83.33 vs. 71.74%, respectively). However, expanded blastocyst stage showed opposite of this trend. Conclusion, improving reproductive performance for rabbit does in G2 (110% from NRC) than in other groups. Also the potential in vitro growthing of rabbit embryos from flushing group post-vitrified was significant higher than in hormonal group.

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Flushing or doe relocation as biostimulation methods for improvement of sexual behaviour and performance of multiparous rabbit doe after a summer resting period

Cited by 6 publications

References 21 publications

A new parameter describing fertility in rabbits at the farm level: the kit index

A new parameter describing fertility in rabbits at the farm level: the kit index

EFFECT OF HORMONAL eCG TREATMENT VERSUS REARING-FASTING PROGRAM ON EMBRYO RECOVERY, REPRODUCTIVE PERFORMANCE AND HORMONAL PROFILE IN NULLIPAROUS RABBIT DOES

In Vitro Development of Vitrified Rabbit's Embryos as Affected by some Nutritional and Hormonal Treatments

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