Preweaning Mortality Of Piglets In Different Seasons [printed text] / Ghimire, R.P., Author ; Dhaubhadel, T.S., Author . - [s.d.] . - 82-89 p.
Languages : English (eng)

Abstract:

Piglet mortality is higher in Neplease governmental as well as farmers' farm. The objective of the study was to investigate the mortality trend of piglets of different breeds, in different season, causes of mortality and ages of mortality. A study was done on the accumulated data of Swine and Avian Research Programme, Khumaltar, Lalitpur. Eleven years data was analysed by different seasons. Total of251 farrowings of Yorkshire and Landrace were involved in the study. Yorkshire had higher stillbirth rates than Landrace in each season Summer season had higher stillbirth rate (17 39% and 11.7 1%) for Yorkshire and Landrace respectively. In Yorkshire, winter season had relatively lower stillbirth rate ll'here as winter (6. 58%) and autumn (7. 69%) had lower stillbirth rates in Landrace. Similarly, autumn season had very high postnatal preweaning mortality (26. 42%) in Yorkshire and, winter (25.47%) and autumn (22.44%) season had higher mortality in Landrace. Lower mortality rates were found in Yorkshire (17.14%) and in Landrace (15.74%) in summer season. First week of age was seen most crucial age. Among the total death of Yorkshire piglets in the season, 86.95%, 58.18%, 57.58% and 52.94% were lost in rainy, winter, summer and autumn seasons respectively in their first week of age. In Landrace too, first week of age had more death percentages i.e. 82.82%, 77.59%, 76.92% and 61.23% in winter, autumn, summer and rainy seasons respectively. Second week of age was also seemed to be higher piglet-loosiug age in both breeds in different seasons. Among the total deaths in the season; 25.49%, 2 3. 64%, 18.18% deaths were occurred in autumn, winter and summer seasons respectively in Yorkshire in second week of age. Similarly, Rainy season and summer season had 34.69% and 23.08% piglets deaths in Landrace in second week of age. Postnatal preweaning mortality was seems to be declined with the growth of piglets' age. Lower mortality was found in third, fourth and fifth weeks of age of piglets of both breeds in every season. Trampling and overlay by sow and weakbirth were the major causes of piglet losses in Yorkshire in all seasons. In winter 40.74% deaths were occurred due to trampling and overlay by sows followed by rainy season (21. 74%). Due to weak birth, 54.90% death cases were happened in autumn and 47.83% in rainy season. Similarly in Landrace; weak birth, trampling and overlay by sow and agalactia were major causes of piglet deaths. Autumn season had 62.07% death cases due to weak birth where as rainy had 2. 0% only. Agalactia had lost the piglets heavily in winter (50. 94%). Trampling and overlay lost 18.97%, 12.0% and 11.32% piglets in autumn, rainy and winter season respectively. Farrowing in summer season had lower mortality rate, weak birth and overlay were major causes of piglets mortality. First weak of age is more risky for piglet deaths.