Effect of season of birth and sex of kid on the production of live weaned single born kids in smallholder East African goat flocks in North East Zimbabwe

Ndlovu, L.R.; Simela, L.

doi:10.1016/0921-4488(95)00844-6

Cited by 21 publications

(21 citation statements)

References 8 publications

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“…Ndlovu & Simela (1996) obtained similar results for goats from Zimbabwe. Najari et al (2007b) also mentioned an influence (P<0.05) of the kidding year because of annual variations, which may be due to the variant productivity of the range lands.…”

Section: Resultssupporting

confidence: 75%

“…The importance of the year effect on the growth performances under difficult conditions has been highlighted by other reports (Alexandre et al, 1997;Zhang et al, 2006). Ndlovu & Simela (1996) days of age than those born in the hot wet season. The kids born in the hot wet season are lighter than those born in the rest of the year.…”

Section: Resultsmentioning

confidence: 99%

“…However, Ndlovu & Simela (1996) observed that the sex of kids did not affect body weights and growth rate from 90 to 180 days of age. Furthermore, the weight gap between males and females becomes larger as they become older, which is consistent with the reports by Hary & Schwartz (2002).…”

Section: Resultsmentioning

confidence: 99%

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The effect of non-genetic factors on the early body weights of Tunisian local goats

et al. 2010

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-It was evaluated in this study the environmental effects on body weights of goat kids from birth to 150 days of age of Tunisian local goat population, on the basis of 1,656 records obtained from the Arid Areas Institute of Médenine, Tunisia, during 2001-2005. Except for birth weight, individual records were adjusted for standard ages (30, 60, 90, 120 and 150 days) using either extrapolation or interpolation on field data. Data were analyzed by GLM procedure and SNK (α = 0.05) means comparison test. The kidding year (2001)(2002)(2003)(2004)(2005), kidding month (December, January, February, and March), birth type (single and twins), sex (male and female), coat colour of kid and age of dam (2-10 years) were definied as non-genetic factors. Results showed that mean values and standard deviation (SD) of body weight at birth (0), 30, 60, 90, 120 and 150 days of age were 2.57 ± 0.52 kg, 4.06 ± 1.16 kg, 6.99 ± 1.87 kg, 8.90 ± 2.46 kg, 11.48 ± 3.35 kg and 13.53 ± 4.80 kg for male and 2.29 ± 0.44 kg, 4.76 ± 1.13 kg, 3.09 ± 1.33 kg, 8.08 ± 2.02 kg, 10.24 ± 2.36 kg and 12.15 ± 6.54 kg for female. The kidding year, birth type and sex had effect on body weights of Tunisian local kids at all ages. The single and male was always heavier than the twins and the females. The birth month had effect on all body weights except for weight at 30 days of age. The age of dam had effect on body weights from 60 to 150 days of age. However, the coat color had no significant effect on all body weights. Environmental effects estimated in this study are important and need to be taken into account for Tunisian local goat management and breeding improvement under harsh conditions.

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Section: Resultssupporting

confidence: 75%

Section: Resultsmentioning

confidence: 99%

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The effect of non-genetic factors on the early body weights of Tunisian local goats

et al. 2010

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“…This corresponded with data published by Chavla et al (1984), Mourad (1993), Ndlovu and Simela (1996), Mourand and Anous (1998) and Portolano et al (2002). Contrary to the authors mentioned above, there were statistically highly significant differences (P ≤ 0.01) between both sexes in our experiment in all time intervals.…”

Section: Resultscontrasting

confidence: 57%

“…between Days 30 and 60 (196.3 g). This tendency, however, differs from data published by Ndlovu and Simela (1996), Kuchtík et al (2002) and Portolano et al (2002), who observed that the intensity of growth slightly decreased with the increasing age. In our experiment, a certain decrease in growth intensity was observed in the subsequent time interval (i.e.…”

Section: Resultscontrasting

confidence: 56%

Effect of some non-genetic factors on the growth of kids of the brown short-haired breed

Kuchtík¹,

Sedláčková²

2005

CZECH J ANIM SCI

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ABSTRACT:The evaluation of effects of some non-genetic factors (sex, litter size, age of dams and year of study) on the growth of 85 kids of the Brown Short-haired breed was carried out in a period of two successive years. The analysis of the growth of all kids revealed that in the time interval from birth to Day 90 of age daily gain and final body weight were 181.3 g and 19.52 kg, respectively. As far as the effect of sex was concerned, the intensity of growth was significantly higher in males than in females (P ≤ 0.01) in all periods under study. From birth to Day 90, the respective daily gains of males and females were 200.6 g and 162.0 g. As far as the litter size was concerned, it was found out that daily gains of singles and triplets were higher than those of twins and that the differences between single kids and twins were significant (P ≤ 0.01) in all periods under study. Specifically, daily gains of single kids, twins and triplets in the time interval from birth to Day 90 were 201.4 g; 167.1 g and 175.6 g, respectively. The analysis of the effect of age of dams on daily gains revealed significant effects of this factor on daily gains in the time intervals of Day 30 -Day 60; Day 60 -Day 90; Day 30 -Day 90 and from birth to Day 90 (P ≤ 0.05). With the exception of the period from birth to Day 30, the highest daily gains were recorded in kids of four-years-old dams in all other periods under study. In both years of study, all kids were reared under nearly identical conditions but the effect of year of study on the growth was significant.

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Effects of genetic and environmental factors on pre-weaning and post-weaning growth in West African crossbred sheep

Benyi

Norris

Karbo

et al. 2006

Trop Anim Health Prod

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Effects of genetic and environmental factors on pre-weaning and post-weaning growth were studied in West African crossbred sheep. Effects of lamb genotype (7/8 Sahelian-1/8 Djallonké, 3/4 Sahelian-1/4 Djallonké and 1/2 Sahelian-1/2 Djallonké; hereafter denoted 7/8Sa, 3/4Sa and 1/2Sa, respectively), parity, type of birth, sex of lamb and year-season of lambing on birth weight, weaning weight, 8-month weight and pre- and post-weaning growth rates were determined. At birth 7/8Sa and 3/4Sa lambs were heavier (p < 0.01) than 1/2Sa lambs. Lambs born to first-parity ewes were lighter (p < 0.01) at birth than lambs of older ewes. At weaning and 8 months of age, lambs born to fourth-parity ewes were heavier (p < 0.05) than those born to ewes of the other parities. Parity did not have any significant effects on pre-weaning growth rate. Lambs born in the rainy season of 2001 were significantly heavier at birth and at 8 months of age than those born in the dry season of 2001/02, but there was no difference between the two groups at weaning. Pre-weaning growth rate was significantly faster in lambs born in the dry season of 2001/02 but the reverse was true for post-weaning growth rate.

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Effect of season of birth and sex of kid on the production of live weaned single born kids in smallholder East African goat flocks in North East Zimbabwe

Cited by 21 publications

References 8 publications

The effect of non-genetic factors on the early body weights of Tunisian local goats

The effect of non-genetic factors on the early body weights of Tunisian local goats

Effect of some non-genetic factors on the growth of kids of the brown short-haired breed

Effects of genetic and environmental factors on pre-weaning and post-weaning growth in West African crossbred sheep

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