Insemination, pregnancy and abortion rates in a population of Glossina palpalis palpalis (robineau-desvoidy) at a relict forest in the Southern Guinea Savanna, Nigeria

Tropical veterinarian Pub Date : 2006-03-08 DOI:10.4314/TV.V23I1.4568

Ado-Baba Ahmed, S. Okiwelu

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引用次数: 1

Abstract

The female populations of Glossina palpalis palpalis were surveyed at the relict forest of River Kajim, Manchok, Nigeria with the objective of determining rates of fertility, types of reproductive losses and the constraints responsible for the reproductive losses. Nullipars constitutes 21.7% of the 272 females dissected. 80.2% of the 213 pars were at different stages of pregnancy; 32.5% had eggs and 20.3%, 17.5% 9.9% had 1 st , 2 nd and 3 rd -instar larvae in their uteri, while 42 pars had empty uteri. Mean monthly pregnancy rates were 70.2 ± 0.03% (57.1%-100%), highest in the peak wet season (34.5%) (July-September) and low in both warm wet (10.6%) (October) and hot dry (11.8%) (February-March) seasons. Virgin females were generally scarce. Abortion, insemination failure and ovular blockage were the common reproductive abnormalities in the population, totaling 9.9%. The results indicate that nutritional and physical stress were the likely constraints to optimum productivity. Keywords : insemination, pregnancy, reproductive abnormality, G. p. palpalis , Southern Guinea Savanna Tropical Veterinarian Vol. 23(1) 2005: 25-31

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尼日利亚南几内亚稀树大草原一片废弃森林中palpalis (robineau-desvoidy)种群的授精、怀孕和流产率

在尼日利亚曼乔克卡吉姆河的废森林中，对palpalis palpalis的雌性种群进行了调查，目的是确定其生育率、生殖丧失的类型以及造成生殖丧失的制约因素。在被解剖的272只雌蛛中，无雌蛛占21.7%。213名产妇中80.2%处于妊娠不同阶段;卵32.5%，子宫内1、2、3龄幼虫20.3%，17.5%，9.9%，空子宫42只。月平均妊娠率为70.2±0.03%(57.1% ~ 100%)，7 ~ 9月丰湿季节最高(34.5%)，10月暖湿季节和2 ~ 3月干热季节均较低(10.6%)。处女通常是稀缺的。流产、人工授精失败和卵泡阻塞是人群中常见的生殖异常，占9.9%。结果表明，营养和生理应激可能是影响最佳产量的制约因素。关键词:人工授精，妊娠，生殖异常，palpalis，南几内亚草原热带兽医Vol. 23(1) 2005: 25-31

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Tropical veterinarian

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