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Animal Science Database

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Abstract

Semen was collected in capillary tubes and stored at 12-16°C. Queens were inseminated once or twice with 8 µl and 2-3 weeks later the number of spermatozoa in the spermatheca was counted. In a 4-year study, results differed somewhat from year to year, but fresh semen gave consistently better...

Author(s)
Konopacka, Z.; Beińkowska, M.
Citation
Pszczelnicze Zeszyty Naukowe, 1995, 39, 1, pp 213-215
Abstract

A total of 78 full sister queens (Apis mellifera carnica) were each instrumentally inseminated with O.75 mm3 semen from one drone (group A), or from 6 brothers (B), or from 6 unrelated drones (C). It was expected that in group C mutual competition between the different spermatozoa might reduce the...

Author(s)
Król, E.; Woyciechowski, M.
Citation
Pszczelnicze Zeszyty Naukowe, 1995, 39, 1, pp 193-194
Abstract

Concern has been growing over whether evaluations for bulls sampled outside AI organizations are sufficiently accurate for widespread use in the USA dairy population. Changes in evaluations over time were studied for bulls that entered AI after having their 1st progeny test. Overall declines in...

Author(s)
Norman, H. D.; Powell, R. L.; Shainline, S. W., Jr.
Citation
Journal of Dairy Science, 1990, 73, Supplement 1, pp 140
Abstract

The percentage of mobile spermatozoa in a fresh semen sample [drone honey bees, Apis mellifera] was determined (59.8%); after 6-10 days' storage it had fallen to 48.8%. Dilution of semen with Hyes solution containing 1.1-2.8% sugars increased the motility, and that of stored semen was comparable...

Author(s)
Konopacka, Z.; Pohorecka, K.
Citation
Pszczelnicze Zeszyty Naukowe, 1995, 39, 1, pp 197-200
Abstract

Data were Predicted Difference (PD) for milk and fat of the 102, 198 and 47 AI sires with semen available for purchase after the Jan. 1987 USDA Sire Summary in Colombia (COL), Mexico (MEX) and Venezuela (VEN). Av. net present values of semen (PV$) were negative in all countries with max. (min.)...

Author(s)
Holmann, F.; Blake, R. W.; Stanton, T. L.; Oltenacu, P. A.; Barker, R.; Milligan, R.; Hahn, M. V.
Citation
Journal of Dairy Science, 1989, 72, Suppl. 1, pp 55
Abstract

Application of linear programming (LP) to dairy sire portfolio selection can result in non-integer units per bull in solutions. Since semen is not purchased in partial units, 2 alternatives are available: round LP solutions or use integer programming (IP). A model was formulated to investigate...

Author(s)
Nash, J. D. L.; Rogers, G. W.
Citation
Journal of Dairy Science, 1992, 75, Supplement 1, pp 151
Abstract

Changes in Modified Contemporary Comparison milk evaluations for 212 Holstein bulls born from 1970 to 1979 and not sampled by AI organizations were predicted using means and s.d. of 1st generation daughter herd-yr characteristics, which included means and s.d. within herd-yr of phenotypic yields,...

Author(s)
Meinert, T. R.
Citation
Journal of Dairy Science, 1992, 75, Supplement 1, pp 246
Abstract

The Upper Midwest has traditionally been a large dairy area in the USA, but av. production per cow continues to lag behind other parts of the country. Wisconsin ranked 8th for av. production per cow in 1960, and ranked 29th in 1990. Wisconsin's ranking for genetic merit of service sires is 38th....

Author(s)
Funk, D. A.
Citation
Journal of Dairy Science, 1992, 75, Supplement 1, pp 186
Abstract

In several experiments, mutant queens were instrumentally inseminated with a mixture of spermatozoa from mutant and from wild-type drones. The resulting progeny had different proportions of mutants. Two factors that affected the proportions seemed to be semen volume, and time after insemination....

Author(s)
Harbo, J. R.
Citation
American Bee Journal, 1988, 128, 12, pp 803-804
Abstract

Author(s)
Reiber, M. A.; Conner, D. E.; Bilgili, S. F.; Kotrola, J. S.
Citation
Poultry Science, 1991, 70, Suppl. 1, pp 98

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