Broeiaktiwiteite van die kransduif (Columba guinea)
Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie/South African Journal of Science and Technology
| Field | Value | |
| Title | Broeiaktiwiteite van die kransduif (Columba guinea) Breeding activities of the rock pigeon (Columba guinea) | |
| Creator | Kok, O. B. Kok, A. C. | |
| Description | Ondersoek is ingestel na die broeiaktiwiteite van kransduiwe (Columba guinea) op die kampus van die Universiteit van die Oranje-Vrystaat te Bloemfontein. In vergelyking met die opvallende seisoensvariasie in ovariummassa en deursnee van makroskopiese follikels wat by wyfies ondervind word, blyk die gonadesiklus van mannetjies relatief konstant te wees. Histologiese ondersoek van die testes bevestig dat volwasse indiwidue, in teenstelling met onvolwassenes, dwarsdeur die jaarpotensieel tot paringsaktiwiteite in staat is. Op grond van die voorkoms van neste, eiers en neskuikens vind broeiaktiwiteite van kransduiwe dwarsdeur die jaar plaas. Neste, waarvan die keuse van nesmateriaal eerder deur die beskikbaarheid as tipe item beïnvloed word, is slegs op die dakke en ander strukture van geboue aangetref. Na uitbroeiing van ’n tipiese broeiselgrootte van twee eiers, vind die daaglikse massatoename van neskuikens op ’n lineêre wyse plaas. The breeding activities of rock pigeons (Columba guinea) on the campus of the University of the Orange Free State at Bloemfontein were investigated. In contrast to the marked seasonal variation in the mass of the ovary and diameter of macroscopic follicles experienced by females, the gonadal cycle of males appears to be relatively constant. Histological investigation of the testes confirms that adult individuals, in contrast to juveniles, are potentially capable of breeding activity throughout the year. Based on the occurrence of nests, eggs and nestlings, breeding activities of rock pigeons take place throughout the year. Nests, of which the selection of nesting material is influenced more by availability than type of item, were found only on the roofs and other structures of buildings. After hatching of a typical clutch size of two eggs, the daily increase in the mass of nestlings takes place in a linear fashion. | |
| Publisher | AOSIS | |
| Date | 1989-03-14 | |
| Identifier | 10.4102/satnt.v8i3.878 | |
| Source | Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie; Vol 8, No 3 (1989); 92-99 Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie; Vol 8, No 3 (1989); 92-99 2222-4173 0254-3486 | |
| Language | eng | |
| Relation |
The following web links (URLs) may trigger a file download or direct you to an alternative webpage to gain access to a publication file format of the published article:
https://journals.satnt.aosis.co.za/index.php/satnt/article/view/878/1830
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