Milk sampling, suckling frequency and suckling behaviour of indigenous pigs of Nigeria: A comparison with exotic pigs
1980
Adebambo, O.A., Institute of Agricultural Research and Training, Moor Plantation, Ibadan, Nigeria | Dettners, A.E.
Milk letdown was stimulated by oxytocin injection. A longer delay period was observed in most cases, ranging from 1 to 4 min in about 70 per cent of the cases. There was no letdown in about 1.6 per cent of the cases. Relative suckling frequency varied from 30 to 20 times over 24 h period being more frequent during the day than during the night. Suckling interval was shortest between the first 3 weeks of lactation; 39 min compared to 62 min in the following 3 weeks and 74 min in the last 2 weeks. However, there was no significant difference in the total time spent at the udder (2½ - 3 min at every nursing) although as milk suckling increased, the pre- and post-nursing periods decreased until the 4th week in lactation. Nursing interval during indirect milk yield determination was regulated at 40 - 45 min, 60 - 65 min and 70 - 75 min respectively during the first 2, middle 3 and last 3 weeks of lactation in an 8-week lactation period.
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