Investigating the effective factors on the survival of Rayeni Cashmere kids in the nomadic system

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Kargar Najmeh; Banabazi Mohammad Hossein; Rezvannejad Elham

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Journal Paper

Paper Information

Journal: ANIMAL SCIENCE JOURNAL Year:2022 | Volume:35 | Issue:137 Page(s): 31-44

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Information Journal Paper

Title

Investigating the effective factors on the survival of Rayeni Cashmere kids in the nomadic system

Author(s)

Kargar Najmeh | Banabazi Mohammad Hossein | Rezvannejad Elham | Issue Writer Certificate

Keywords

Goat

Weibull function

Survival rate

Genetic and environmental factors

Abstract

Survival records and pedigree information from Rayeni kids born between 1993 and 2009 from breeding station of Rayeni Cashmere goat, located in the Baft city, were used. Also, by completing questionnaire from breeding station of Rayeni Chashmere goat and flock nongovernmental, in Kerman province environmental factors affecting survival and survival rate were obtained. 11 herds with geographical diversity and different herd sizes in Kerman province were selected. The highest and lowest percentages of kid removal were related to fattening surplus (54.2%) and defective removal (0.4%), respectively. Death due to disease after fattening surplus was the most common cause of kid removal (22.3%). Survival rate in these herds was 89.94 percent. according to the results overall mean of lifetime cumulative was 310.3 days. The effect of fixed factors year and month of birth, sex of kid and kid’s birth weight as quadratic were significant. The estimates of heritability in logarithmic scale were low to medium (0.14 to 0.40), original scale were medium to high (0.25 to 0.70) and effective heritability were medium (0.23 to 0.61). Since the estimated genetic parameters for survival of goats are moderate, to improve the survival of goats from birth to one year of age and increase the economic profit of the farmer, while improving nutritional and managerial conditions, genetic selection within the breed can be considered.

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