Susan Hansen has been Delta County, Colorado, administrator since 1992. She
also serves as facilitator for the North Fork Coal Working Group, a collaborative
group of government, business and environmental group representatives that
meets quarterly to share information about, and address potential impacts of, coal
development activities in Delta and Gunnison counties. She and her husband own
and operate a cattle ranch in Crawford, Colorado.
According to Coppock (1994) under pastoralist management conditions, age at first
calving is about four years of age. At Abernossa ranch in Ethiopia, weight and age at
puberty in heifers were found to be about 155 kg and 22 months, respectively. Calving
rate under a single-sire mating system was also improved to above 80% (Azage 1989),
compared to about 45% under pastoral management conditions (Coppock 1994). These
results would therefore indicate the improvement that could be achieved through proper
selection scheme and better management....
Literature reports comparing Ethiopian Boran with other indigenous Ethiopian cattle breeds
indicate better growth performance for Ethiopian Boran (Table 2). Additionally, through
improvement in management and selection, performance of Boran has been substantially
improved. For example, the improved Boran is heavier at birth averaging 30 kg (DAGRIS
2006) and at Abernossa ranch in Ethiopia the weaning weight was estimated at 158
kg (Banjaw and Haile-Mariam 1994). This variation indicates the potential that can be
exploited by within breed selection and improvement in management. ...