检索结果-南通市图书馆

Evaluation of two methods of estrus synchronization of cattle in Chad

Open Journal of Animal Sciences 2014年第1期4卷 13-17页

作者： vounparet zeuh Mopate Logtene Youssouf Nadjilem Dingamtar Djonret Dezoumbe Faculty of Exact and Applied Sciences University of N’Djamena N’Djamena Chad Livestock Polytechnic Institute of Moussoro Moussoro Chad Zootechnical and Veterinary Research Laboratory N’Djamena Chad

The results of an artificial insemination experiment carried out in the suburban area of N’Djamena are here reported. Two methods of synchronization (Norgestomet combination/estradiol/PGF2a/PMSG and PGF2a only) were used with Chadian zebu and crossed breeds in 2007 and 2008. Females were inseminated after induction of estrus with semen of French Normand breed. The fertility rate was low with PGF2a (29.41%). The results obtained with the combination of several hormones were better (66.66%). The survival rates of crossbreeds were particularly low, 40% in 2007 and 33.33% in 2008, mainly due to the traditional management of the herd and the lack of technical support. The insemination cost of a cow was 39,550 F CFA in 2007 with PGF2a and 59,200 F CFA in 2008 with the method consisting of combining of four hormones. The cost of producing a calf in those two years was very high, 134,470 F CFA in 2007 and 118,400 F CFA in 2008.

关键词： Cattle Estrus Synchronization Pregnancy Cost Chad

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Structure and Reproductive Performances of Sahelian Goats in the Guera Region, in Central Chad

引用

Open Journal of Animal Sciences 2014年第4期4卷 175-181页

作者： Logténé Youssouf Mopaté vounparet zeuh Issa Youssouf Adoum Djimtoloum Nadjissara Livestock Polytechnic Institute of Moussoro Moussoro Chad Livestock Research Institute for Development (LRID) ex Zootechnical and Veterinary Research Laboratory N’Djamena Chad University Institute of Sciences and Techniques Abeche Chad

The purpose of the study was to establish the structure of monitored animal farms and determine reproductive parameters of Sahelian goats in the Guera Region, in Central Chad. Data were collected through longitudinal survey in 27 observatory farms during three years using goats identified by numbered ear tags. The herds were composed on average of about 71% of females. The age pyramid covering all years showed a significant number of males aged between 0 - 1 year and perceptible fall thereafter. However, some stability was observed in the class of the 2 - 8 years old among females. The frequencies of accumulated kiddings showed that 44% of births occurred in the rainy season against 28% respectively in the cool dry and hot dry seasons. Obtained reproduction parameters were: a sex ratio of 0.51 in favor of males, a kidding interval of 10.6 months with significant differences (P < 0.05) according to the rank of birth, an age at first kidding of 16.5 months for females born in monitoring and an age of 20.3 months for all first-kidding, giving an apparent fertility rate of 145%, a fecundity rate of 116% and an abortion rate of 2%. The composition and structure of herds have highlighted the importance of females to ensure the reproducibility of goat production systems. The determined reproduction parameters are references for actions to improve goat rearing in this area.

关键词： Breeding Goats Structure Reproduction Sahel Zone Guera Chad

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Diversity and Origin of Indigenous Village Chickens (<i>Gallus gallus</i>) from Chad, Central Africa

引用

Advances in Bioscience and Biotechnology 2015年第9期6卷 592-600页

作者： Khadidja Hassaballah vounparet zeuh Raman A. Lawal Olivier Hanotte Mbacké Sembene Department of Biology Faculty of Exact and Applied Sciences University of N’Djamena N’Djamena Chad Livestock Polytechnic Institute of Moussoro Moussoro Chad School of Life Sciences The University of Nottingham University Park Nottingham UK Department of Animal Biology Faculty of Sciences and Techniques Cheikh Anta Diop University of Dakar Dakar Senegal

In this study we assess the maternal genetic diversity and origin of indigenous village chickens from Chad complementing previous phenotypic and biometric measurements studies. We analysed a 387 bp fragment of the mitochondrial DNA (mtDNA) D-loop region of 181 village chickens from three populations of western Chad (Lake Chad/Hadjer Lamis), central Chad (Guera) and south-west Chad (Pala) and at different poultry markets in N'Djamena. Twenty-five polymorphic sites and 20 haplotypes are identified. Phylogenetic and network analyses group all chicken into a single mtDNA haplogroup D. Comparison with reference sequences shows that this haplogroup is the commonest one observed in chicken and it supports the Indian subcontinent as the maternal center of origin for the village chicken in Chad. Little genetic variation was found within and between populations which is in agreement with a recent and a maternal founding effect for the chicken in the country.

关键词： mtDNA D-Loop Genetic Variation Origin Village Chickens Chad

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：