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Effects of Birth Date and Order in Lactation Performance of Iberian Red Deer (Cervus elaphus hispanicus)

¹ Instituto de Investigación en Recursos Cinegéticos (IREC, CSIC-UCLM-JCCM), Sec. Albacete (IDR),
² Departamento de Ciencia y Tecnología Agroforestal, ETSIA, and
³ Sección de Recursos Cinegéticos, IDR, Universidad de Castilla-La Mancha, 02071 Albacete, Spain

Corresponding author: T. Landete-Castillejos; e-mail: tomas.landete{at}uclm.es.

This study discriminated between 2 effects (birth date and presence of older calves) assessed jointly in previous studies. Birth date delay produced similar effects to those reported previously: reduced milk and milk nutrient production in late-calving hinds, concentration of milk, substitution of protein by fat, greater body weight losses of dams (hinds), and reduced calf growth. Hinds in a group consisting of early- and late-born calves produced more milk, and calves grew more than their isolated counterparts. Evidence exists for consequences of foster suckling by early-born calves in mixed groups of early- and late-born calves at the end of the standard birth period, because these calves grew more than predicted by the milk production of their dams. In contrast, no detrimental effect was found in late-born calves of this group. Lack of differences might be due to the excess of hind milk production during the first 5 wk of lactation previously recorded in other experiments.

Key Words: red deer • lactation • milk composition • birth date

Abbreviation key: BD = birth date delay with respect to first calf born, TFY = total fat yield, TLY = total lactose yield, TMY = total milk yield during an 18-wk lactation, TPY = total protein yield

This article has been cited by other articles:

				L. Gallego, T. Landete-Castillejos, A. Garcia, and P. J. Sanchez Seasonal and Lactational Changes in Mineral Composition of Milk from Iberian Red Deer (Cervus elaphus hispanicus) J Dairy Sci, February 1, 2006; 89(2): 589 - 595. [Abstract] [Full Text] [PDF]