Conception rates and calving intervals of different beef breeds at a farm in the semi-arid region of Namibia

Samkange, Alaster; Kandiwa, Erick; Mushonga, Borden; Bishi, Alec S.; Muradzikwa, Erdwin; Madzingira, Oscar

doi:10.1007/s11250-019-01876-4

Cited by 6 publications

(10 citation statements)

References 33 publications

(47 reference statements)

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“…Gestations carrying male foetuses are generally longer and thus result in heavier neonates than those carrying female foetuses (Gaafar et al 2011;Hoffman et al 2017). Space and nutritional constraints imposed on foetuses in utero limit future productivity of the offspring by limitations imposed, in utero, on stem cell numbers through a phenomenon known as developmental programming (Greenwood et al 2017;Hoffman et al 2017;Samkange et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Production performance of sheep and goat breeds at a farm in a semi-arid region of Namibia

Kandiwa

Nguarambuka

Chitate

et al. 2020

Trop Anim Health Prod

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This study retrospectively investigated the effect of breed and season on the lambing/kidding dynamics, growth performance, neonatal viability, and weaning dynamics of sheep (Damara, Dorper, and Swakara) and goats (Boer goat and Kalahari Red) at a farm in the Khomas Region of Namibia between 2004 and 2015. Litter size was dependent on breed (X 2 (12, N = 3388) = 796, p < 0.001), with twinning more frequent in Dorper sheep and Kalahari Red and Boer goats than in the Damara and Swakara sheep (p < 0.05), while triplets were more prevalent in the Dorper sheep and Kalahari Red goats (2.8% and 1.0%, respectively; p < 0.05). Distribution of birth weight categories was dependent on breed. There was a significant difference in the proportions of birth weight categories between breeds (X 2 (12, N = 3388) = 467, p < 0.001) whereby Dorper lambs were mostly born weighing below 3 kg (2.6%, p < 0.05); Boer goat kids, Kalahari Red kids, and Damara lambs were mostly born weighing 3 to < 4 kg (4.3%, 6.3% and 19.9%, respectively; p < 0.05); Swakara lambs were mostly born weighing 4 to < 5 kg (12.2%, p < 0.05), and Swakara lambs were mostly born weighing ≥ 5 kg (3.3% and 2.3%, respectively, p < 0.05). Weaning age categories were dependent on breed (X 2 (12, N = 3388) = 241, p < 0.001) whereby Dorper lambs were mostly weaned at below 3 months of age (2.8%, p < 0.05); Damara lambs were mostly weaned at 3 to < 5 months of age (12%, p < 0.05), and Boer goat kids were mostly weaned at ≥ 5 months of age (0.9%, p < 0.05). Neonatal viability was dependent on breed (X 2 (8, N = 3388) = 49.2, p < 0.001) whereby Dorper lambs were more susceptible to abortions and neonatal deaths (0.6% and 1.5%, respectively; p < 0.05) than the rest of the breeds. Breed and lambing season interacted to produce effects on the birth weight of offspring although lambing season alone did not have a significant effect on Boer goat and Kalahari Red kids' birth weights.

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Section: Introductionmentioning

confidence: 99%

Production performance of sheep and goat breeds at a farm in a semi-arid region of Namibia

Kandiwa

Nguarambuka

Chitate

et al. 2020

Trop Anim Health Prod

Self Cite

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“…Only one death was reported in a privately owned enterprise. A similar study on the conception rate of beef cattle indicated 71.7 ± 9.5% (Samkange et al, 2019), and the overall conception rate of the Nguni cows (78.3%) was significantly higher than that of the Afrikaner (70.9%) and Simmental cows (64.9%) (p < 0.05). Apori and Hagan (2014) reported calving and conception rates of 74.3 and 76.1%, respectively, in various herds of Sanga cattle in Southern Africa under similar conditions.…”

Section: Discussionmentioning

confidence: 61%

Evaluation of Nguni cattle performance from communal property associations and private ownership types across three ecological zones of Mpumalanga province, South Africa

Sambo

Tada

Chitura

et al. 2023

5005

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Nguni cattle in South Africa are diminishing at the expense of exotic breeds and crossbreeds. Therefore, the Industrial Development Corporation and Mpumalanga Province Department of Agriculture adopted the Nguni cattle conservation project. Herds of 30 heifers and a bull were allocated to 34 communal property associations (CPAs) and 40 private farms. This study aimed to evaluate growth and reproductive performance across three ecological zones and two ownership patterns. Nine CPAs and nine private farms were sampled. Age at first calving, conception, calving, and weaning rates were determined from production records, while calf birth and weaning weights were digitally measured. Data was analyzed using two-way analysis of variance (ANOVA) with Tukey’s honestly significant difference (HSD) used for mean separation. Significant differences were observed across ecological zones for age at first calving, weaning rate, and birth and weaning weights (p < 0.05). Concerning age at first calving, the Midveld ecological zone performed best (24 months) for both ownership types compared to the Highveld (28.09 months private, 26.00 CPA) and Lowveld (28.35 months for both ownership types). Highveld performed higher on birth weight (25.35 kg) and weaning rate for private (93%) and CPA (80%). Lower birth weights were observed in both ownership types in Midveld (22.17 kg). The Lowveld zone had a higher birth weight (26.80 kg) in CPA. Higher weaning weights were observed in private ownership of Highveld (190.16 kg) and the lowest (160.39 kg) in the Midveld zone. CPAs in Highveld had higher weaning weights (187.55kg) than in Midveld (167.50 kg). The results suggest that Nguni cattle respond differently in the various ecological zones of Mpumalanga Province.

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“…Several factors affect the length of the calving interval; including the breed of the cows. A study of Samkange et al (2019) demonstrated that Nguni cows had calving intervals significantly shorter than those of Afrikaner and Simmental cows. Besides the breed factor of the cows, general factors derive from genetics and environment might be the most affecting calving interval individually.…”

Section: Calving Interval Of the Bali Cows Raised Under Palm Oil Plan...mentioning

confidence: 99%

Reproductive Potential of Bali Cows Raised under Palm Oil Plantation in Manokwari Regency, West Papua, Indonesia

Fatem¹,

Toleng²,

Yusuf³

et al. 2023

AAVS

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Conception rates and calving intervals of different beef breeds at a farm in the semi-arid region of Namibia

Cited by 6 publications

References 33 publications

Production performance of sheep and goat breeds at a farm in a semi-arid region of Namibia

Production performance of sheep and goat breeds at a farm in a semi-arid region of Namibia

Evaluation of Nguni cattle performance from communal property associations and private ownership types across three ecological zones of Mpumalanga province, South Africa

Reproductive Potential of Bali Cows Raised under Palm Oil Plantation in Manokwari Regency, West Papua, Indonesia

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