Effect of Light Colour and Reproductive Rhythm on Rabbit Doe Production

Gerencsér, Zsolt; Matics, Zsolt; Nagy, I.; Szendrő, Zsolt

doi:10.4995/wrs.2011.827

Cited by 9 publications

(10 citation statements)

References 14 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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“…Thus, the 2 treatments were assessed separately. The effects of parity order on reproductive traits were shown by Gerencsér et al (2011). In this paper, the effect of feeding program is discussed.…”

Section: Methodsmentioning

confidence: 99%

“…The origin of this breed was described by Szendrő et al (1998). The design of the experiment was shown in the previous paper Gerencsér et al (2011). At 11 wk of age the female rabbits were randomly placed in 2 rooms.…”

Section: Methodsmentioning

confidence: 99%

Effect of lighting schedule on production of rabbit does

Gerencsér

Matics²,

Nagy

et al. 2011

World Rabbit Sci.

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AbstrAct:The aim of the experiment was to analyse the effect of the feeding program between 21 days post partum (dpp) to weaning (35 dpp) on the production of rabbit does and their kits. The does were randomly housed in 2 rooms. In the 1 st room, a continuous 16 h light period was applied (16L; n=60). In the 2 nd room, an 8 h light period was used which was extended by an additional 1 h light period in the middle of the 16 h long dark period 8 d prior to insemination (8+1L; n=59). In both rooms, 2 sub-groups were formed: in the 1 st subgroup, does and their kits received breeding pellet from parturition to weaning (digestible energy: 10.4 MJ digestible energy/kg, crude protein: 17.8%, crude fibre: 13.6%; BB group; n=60 does, 228 parturitions); in the 2 nd sub-group, the breeding pellet was replaced by growing pellet from 21 dpp to weaning (digestible energy: 9.7 MJ digestible energy/kg, crude protein: 16.0%, crude fibre: 17.2%; BG group; n=59 does, 234 parturitions). The experiment was completed after 5 reproductive cycles. As no significant interaction was found between the lighting and feeding programmes, the 2 effects are evaluated separately. In this paper, the effect of feeding program is discussed. No significant differences were observed between the BB and BG groups for number of inseminations per parturition, body weight of the does measured at parturition and at 21 dpp or for litter size. Changing the pellet in BG group significantly affected the body weight of the does measured at 35 dpp (4610 vs. 4530 g, in BB and BG, respectively; P=0.016), the litter and individual body weight of the kits at 35 dpp (8160 vs. 7834 g and 1006 vs. 964 g for BB and BG, respectively; P≤0.001) and the does' condition at kindling, as measured by the TOBEC method (E-value: 1922 vs. 1957 for BB and BG, respectively; P=0.024). Productivity indexes, expressed as number of kits born alive, number of weaned (at 35 dpp) kits and total weight of the weaned kits per year per doe were similar in the 2 groups. Body weight of the growing rabbits was significantly higher in the BB group at the ages of 5 and 7 wk (984 and 937 g, P<0.001, 1651 and 1621 g, P=0.008; respectively). After this period, the body weight of the 2 groups was the same. The feeding program had no effect on the feed conversion ratio and mortality of the 2 groups. According to the results, it may be concluded that it is preferable to avoid food changes around weaning.

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“…Several researchers observed that increasing daily lighting length before insemination can be an efficient biostimulation method to improve the receptivity (TheauClément et al, 2008) and kindling rate of the does (Theau-Clément et al, 1990;Mirabito et al, 1994;Gerencsér et al, 2010). The effect of different lighting colours was also studied (Gerencsér et al, 2011). Moreover, according to Seitz (1997) and Selzer (2000), the change in light and dark periods is a signal for the does to nurse their kits.…”

Section: Introductionmentioning

confidence: 99%

Effect of light intensities on reproductive performance, nursing behaviour and preference of rabbit does

et al. 2016

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The aim of the experiment was to compare the reproductive performance and nursing behaviour of rabbit does reared under 2 different light intensities and observe the preference of does among cages with different light intensities. Female rabbits were randomly housed in 2 identical rooms, under the same housing conditions in wire-net cages. The 2 rooms only differed in the light intensity; group L: 150-200 lux (n=54 does, 230 inseminations), group D: 10-20 lux (n=54 does, 232 inseminations). Reproduction data from the first 5 consecutive reproductive cycles were evaluated. Nursing behaviour of the does (n = 24) was observed at the 2 nd or 4 th lactation. The preference of does (n=8) among 4 cages with different light intensities (10, 35, 75 or 155 lux) was examined. There were 6-7% difference between the 2 groups in the number of kits born in total and those born alive (born total: 11.25 vs.

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Effect of Light Colour and Reproductive Rhythm on Rabbit Doe Production

Cited by 9 publications

References 14 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 lighting schedule on production of rabbit does

Effect of light intensities on reproductive performance, nursing behaviour and preference of rabbit does

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