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D R Osterhoff

Publications and source records attributed to D R Osterhoff.

32 records · Page 2Linked to original sources

Owner-pet relationships--a kynological study.

The paper supplies the results of a first survey of its kind: a total of 46 questions were presented to dog owners mainly in the areas in an around Johannesburg, Cape Town, Bloemfontein, Pretoria, Windhoek, Salisbury, Port Elizabeth and Durban and the answers compiled. In this "kynological study", all aspects of the dog, his behaviour and relationship to man are involved. It is clear that South Africans love and care for their animals and spend about R135 per year on their pets. Some indications of differences between the owners of dogs--Afrikaans- and English speaking persons, as well as new immigrants--became apparent, but more data are needed to make clear differentiations. Comparisons to other countries would also throw more light on the "pet owner problem".

Animals↗

Isoimmune blood group antibodies in cattle after the use of a blood vaccine.

A total of 100 animals were inoculated twice within 21 days with the Onderstepoort babesiosis vaccine. High blood group antibody titres were recorded, especially after the second inoculation. The possibility is discussed of neonatal isoerythrolysis occuring after vaccination as a result of maternal isoimmune blood group antibodies gaining access to the circulation of the offspring which inherited the corresponding blood group factors from its size.

ABO Blood-Group System↗

Biochemical gene markers in the gerbil Tatera brantsii from Lesotho.

Several geographically separated populations of the gerbil Tatera brantsii were investigated with protein and enzyme gene markers. Genetic variation was found in the following systems: serum albumin, 6-PGD, haemoglobin, esterase, IDA and GPI. No variation was found in the SDH and LDH systems. There appeared to be only slight differences in gene frequencies between populations. No real seasonal variation in any of the frequencies could be established.

Animals↗

PGM3 locus and its genetic polymorphism in leucocytes of goats.

PGM3 activity was investigated in 150 'Boerbok' goats and 132 Angora goats by means of horizontal starch gel electrophoresis. In 'Boerbok' goats no polymorphism was found. In Angora goats three different phenotypes have been recognized: F, S, and FS. The results suggest the occurrence of two common alleles: PGM3-F and PGM3-S at an autosomal locus with frequencies of 0.6176 and 0.3824, respectively.

Alleles↗

Haemoglobin types in African cattle.

The migration of domesticated animals in Africa is of particular interest to the anthropologist and ethnologist in that it may provide valuable information concerning the migration of human tribes that accompanied these animals. Haemoglobin C is only found to be present in indigenous breeds of African cattle and can therefore be used as one of the best genetic markers of these animals. Haemoglobin B has been established in many breeds in Africa and India. It seems that the further away the animals migrated from India, the lower is the frequency of HbB. Breed comparisons from numerous breeds in Africa are made, including the results of the present investigations on breeds of different countries in Southern Africa.

Africa, Southern↗