Impact of the Selection Criteria of Artificially Inseminated Cows on the Probability of Conception and the Occurrence of Embryonic Mortality in Senegal: Modeling Approach

Mouliom Mouiche, Mohamed Moctar and Sow, Adama and Kalandi, Miguiri and Mpouam, Serge Eugene and Ouedraogo, Georges Anicet and Sawadogo, Germain Jerome (2013) Impact of the Selection Criteria of Artificially Inseminated Cows on the Probability of Conception and the Occurrence of Embryonic Mortality in Senegal: Modeling Approach. Sustainable Agriculture Research, 2 (4). pp. 39-47. ISSN 1927-050X

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Abstract

The objective of this study was to measure the relative influence of the animal’s age, body condition score (BCS), glycemia at day of insemination (D0) and the livestock management system on the probability of conception and occurrence of embryonic mortalities. In this study, 81 inseminated cows both of the Gobra Zebu breed and crossbred were sampled. Blood samples were collected the day of insemination (D0) and twenty-one (D21) and thirty-five (D35) days after AI. The BCS, the age and the livestock management system were recorded for all animals before the artificial insemination (AI). The glycemia was measured on D0. Pregnancy diagnosis was performed by progesterone and pregnancy associated glycoprotein assays and transrectal palpation. A multinomial logistic model was used to analyze the effect of the selection criteria for cows on the success rate of AI.

The pregnancy diagnosis makes possible to detect 47% of pregnant cows and 26% of late embryonic mortality (LEM) at D60 post AI. The maximum likelihood test carried out on the model permits to reject the null hypothesis (p < 0.0001) according to which all animals have the same chance of being pregnant (47%). The variables thus provide a significant amount of information to explain the variability in the success rate of AI. The most significant factor was age (p < 0.0001), followed by the BCS, then glycemia and finally the livestock management system (p = 0.047). The BCS is the factor that most explains the variability in pregnant cows. For the group of LEM, age of the animal accounts for variability.

Item Type: Article
Subjects: West Bengal Archive > Agricultural and Food Science
Depositing User: Unnamed user with email support@westbengalarchive.com
Date Deposited: 19 Jun 2023 08:42
Last Modified: 12 Sep 2024 04:36
URI: http://article.stmacademicwriting.com/id/eprint/1092

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