TY - JOUR
T1 - Milk yield and composition of Katahdin and Pelibuey ewes in tropical conditions
AU - Chay-Canul, A. J.
AU - Parra-Bracamonte, G. M.
AU - Lopez-Villalobos, N.
AU - Herrera-Ojeda, J. B.
AU - Magaña-Monforte, J. G.
AU - Peniche-González, I. N.
AU - Herrera-Camacho, J.
AU - García-Herrera, R.
N1 - Publisher Copyright:
© 2020 Polish Academy of Science. All rights reserved.
PY - 2020
Y1 - 2020
N2 - Pelibuey and Katahdin are two the most extensively used hair sheep breeds in tropical regions characterized by high temperatures and humidity. Lactation influences profitability of sheep in dairy and non-dairy production systems. Therefore, the aim of this study was to evaluate the effect of breed and litter size (LS) on milk yield and milk composition of Pelibuey (n = 28) and Katahdin (n = 21) ewes reared under tropical conditions of Mexico. Milk, fat, protein and lactose yields, fat and energy-corrected milk, and fat, protein and lactose percentages were measured for seven weeks. Body weight (BW) of each ewe was measured weekly. Breed effects were significant (P< 0.001) favouring Katahdin breed on all yield traits. Ewes rearing two lambs had higher yields (P < 0.01) for all traits than ewes rearing one lamb. Fat percentage and BW were significantly (P < 0.05) affected by a triple interaction effect of Breed x LS x Week. So, important differences in milk yield and composition among breeds and LS were shown and might be considered in order to improve profitability of sheep production systems under tropical conditions.
AB - Pelibuey and Katahdin are two the most extensively used hair sheep breeds in tropical regions characterized by high temperatures and humidity. Lactation influences profitability of sheep in dairy and non-dairy production systems. Therefore, the aim of this study was to evaluate the effect of breed and litter size (LS) on milk yield and milk composition of Pelibuey (n = 28) and Katahdin (n = 21) ewes reared under tropical conditions of Mexico. Milk, fat, protein and lactose yields, fat and energy-corrected milk, and fat, protein and lactose percentages were measured for seven weeks. Body weight (BW) of each ewe was measured weekly. Breed effects were significant (P< 0.001) favouring Katahdin breed on all yield traits. Ewes rearing two lambs had higher yields (P < 0.01) for all traits than ewes rearing one lamb. Fat percentage and BW were significantly (P < 0.05) affected by a triple interaction effect of Breed x LS x Week. So, important differences in milk yield and composition among breeds and LS were shown and might be considered in order to improve profitability of sheep production systems under tropical conditions.
KW - Lactation
KW - Litter size
KW - Milk solids
KW - Milking performance
KW - Sheep
KW - Tropics
UR - http://www.scopus.com/inward/record.url?scp=85120383120&partnerID=8YFLogxK
U2 - 10.22358/jafs/129966/2020
DO - 10.22358/jafs/129966/2020
M3 - Artículo
AN - SCOPUS:85120383120
SN - 1230-1388
VL - 29
SP - 352
EP - 357
JO - Journal of Animal and Feed Sciences
JF - Journal of Animal and Feed Sciences
IS - 4
ER -