Estimation of the intercalving period in Italian Mediterranean buffalo
| Autor: | B. Ariota, Ettore Varricchio, Gianluca Neglia, Giuseppe Campanile, L. Zicarelli, R. Di Palo |
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| Přispěvatelé: | Zicarelli, Luigi, DI PALO, Rossella, Neglia, Gianluca, Ariota, B., Varricchio, E., Campanile, Giuseppe |
| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
Mediterranean climate
education.field_of_study Intercalving Buffalo Intercalving Seasonality Longevity Mean value Population Ice calving Regression analysis Buffalo Seasonality Biology medicine.disease Animal science Longevity Herd Seasonal breeder medicine Animal Science and Zoology lcsh:Animal culture education lcsh:SF1-1100 |
| Zdroj: | Italian Journal of Animal Science, Vol 6, Iss 2s, Pp 709-712 (2010) |
| Popis: | Aim of this study was to estimate the average intercalving period of a buffalo herd/population, by using the percentage of subjects that are able to conceive within 90 days post-partum, and that, consequently, have an intercalving period lower than 400 days, in order to give a precocious judgment on its fertility. A total number of 8,845 intercalving periods were recorded in 4 farms and 4 Provinces of Campania and Lazio Regions. In all the farms the out of breeding season mating technique was adopted and a constant diet was administered throughout the year. Values were grouped for primiparous and pluriparous buffaloes and were divided in four calving periods: January-March; April-June; July-September; October-December. Within each group/farm ANOVA was performed and the means were analysed by t Student test. In each group the mean value and the percentage of subjects with an intercalving period lower than 400 days (% < 400 days) were calculated and the regression analysis was carried out between the values of the intercalving periods and the % < 400 days. Finally, an all-in regression analysis was performed by using the data of 55 groups, excluding those with less than 25 values. The regression analysis between % < 400 days and the mean value of the intercalving period was always significant, except in one case. The comparison between the real values and those calculated allows to affirm that, if the percentage of subjects with an intercalving period lower than 400 days is higher than 50%, an intercalving period lower than 450 days will be probably recorded. |
| Databáze: | OpenAIRE |
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