Arch Med Vet 42, 79-85 (2010)ARTÍCULO SUMMARYThe aim of this study was to characterize milk yield, somatic cell count (SCC) and solids in goat milk according to level of milk yield and lactation period in an intensive dairy goat system. Twenty-five Saanen goats of parity 2, managed under the same conditions, were studied. Goats were assigned into two groups. Group A was defined as low milk yield (< 450 L/lactation) and Group B as high milk yield (> 550 L/lactation). Once a month, a milk yield control was conducted during the two milking periods. A milk sample was taken once a day during 10 months. Total protein, fat and lactose were assessed using a Milkoscan 133B. Somatic cell counts were determined using a Fossomatic 90. The outcome variables were compared between groups A and B. Results were analyzed by ANOVA and least square means were compared by Tuckey-test (P ≤ 0.05). Groups A and B produced 346 ± 64.9 L and 703 ± 209 L of milk, respectively. The average milk production by lactation period was similar for both groups. The highest levels of milk yield were reached between the second and fourth month of lactation. There was a tendency to higher levels of SCC in group B, however values remained within the normal levels reported in other studies. Milk fat, protein and total solids followed an inverse pattern in relation to the curve of milk yield. Lactose was stable through the entire lactation. Correlation between SCC and milk yield was moderate and negative. There was no relationship between SCC and milk solids. Milk yield and solids (protein and fat) had moderate and negative correlations.Palabras clave: recuento de células somáticas, leche caprina, composición láctea.

The feasibility of alternate dairy control as an alternative to traditional dairy control was evaluated. Adjustment factors were obtained for morning (AM) and afternoon (PM) milkings and applied to animals subjected to alternate dairy control to estimate uncontrolled milking and total daily milk yield. Data was compiled from six dairy goat farms in the Metropolitan Region of Chile for animals with completed lactations (of 305 days) and with recorded date of birth and parturition, parity and a minimum of six controls per lactation (used to determine AM, PM and total production). Values were sorted by productive factors parity and lactation month. Statistical analysis was performed using the Number Crunchers Statistical System ®2000 (Kaysville, UT, USA) to obtain mean values and adjustment factors for each productive factor and to make possible their application on any animal presenting the minimum required information. Adjustment factors were applied to 8788 values to estimate total daily milk yield. AM values estimated more accurate totals than PM values. Analysis provided r 2 values of 0.9083 and 0.7593, respectively, and supported the reliability of applying calculated adjustment factors to one of two daily milkings. The alternate dairy control system represents a viable alternative for estimation of total daily milk yield.

In the present study, results from the statistical analysis of the diameter means taken from wool samples of moder animal and conclusions of their use as patters for archaeological verification are presents. Futhermore, a list of the archaeological samples studies and its identification based in macro and microscopical metric analysis of wool are delivered.