Co-occurrence of mated workers and a mated queen in a colony of Platythyrea arnoldi (Hymenoptera Formicidae).
- Authors: Villet, Martin H
- Date: 1993
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/447377 , vital:74619 , https://hdl.handle.net/10520/AJA00445096_510
- Description: A colony of Platythyrea arnold; was found to contain a functional queen and laying workers, both virgin and mated. This form of social organization has never been reported in ants before.
- Full Text:
- Date Issued: 1993
- Authors: Villet, Martin H
- Date: 1993
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/447377 , vital:74619 , https://hdl.handle.net/10520/AJA00445096_510
- Description: A colony of Platythyrea arnold; was found to contain a functional queen and laying workers, both virgin and mated. This form of social organization has never been reported in ants before.
- Full Text:
- Date Issued: 1993
The cicada genus Bavea Distant 1905 (Homoptera Tibicinidae) redescription, distribution and phylogenetic affinities
- Authors: Villet, Martin H
- Date: 1993
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/453855 , vital:75294 , https://doi.org/10.1080/03946975.1993.10539232
- Description: The monotypic genus Bavea Distant 1905 and its constituent species are redescribed. The forewing venation, tymbal structure and aedeagal structure are diagnostic. Bavea concolor (Walker 1850) is endemic to the eastern Cape province of South Africa. The closest affinities of the genus appear to lie with the genera Xosopsaltria Kirkaldy 1904 and Tettigomyia Amyot and Serville 1843, and less closely with Stagira Ståi 1861.
- Full Text:
- Date Issued: 1993
- Authors: Villet, Martin H
- Date: 1993
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/453855 , vital:75294 , https://doi.org/10.1080/03946975.1993.10539232
- Description: The monotypic genus Bavea Distant 1905 and its constituent species are redescribed. The forewing venation, tymbal structure and aedeagal structure are diagnostic. Bavea concolor (Walker 1850) is endemic to the eastern Cape province of South Africa. The closest affinities of the genus appear to lie with the genera Xosopsaltria Kirkaldy 1904 and Tettigomyia Amyot and Serville 1843, and less closely with Stagira Ståi 1861.
- Full Text:
- Date Issued: 1993
Winter absconding as a dispersal mechanism of the Cape honeybee
- Hepburn, H Randall, Villet, Martin H, Jones, Georgina E, Carter, A, Simon, V, Coetzer, W
- Authors: Hepburn, H Randall , Villet, Martin H , Jones, Georgina E , Carter, A , Simon, V , Coetzer, W
- Date: 1993
- Language: English
- Type: Article
- Identifier: vital:6862 , http://hdl.handle.net/10962/d1011154
- Description: The dispersal characteristics of the African honeybee, Apis mellifera scutellata, resulted in a greatly mobile hybrid front in the New World, but in Africa its hybridization zone with the Cape honeybee, Apis mellifera capensis, appears very stable.The maintenance of stable hybrid zones is predicated on a balance between dispersal and selection Knowledge on the extent of gene flow from either race is in its infancy, and the probability of successful dispersal by either race has not yet been considered. Both capensis and scutellata are notorious for absconding, capensis the more so for resource-related seasonal absconding in winter. The two races also differ fundamentally in the ways they conserve heat both behaviourally and physiologically. We investigated the energy consumption and colony survival characteristics of capensis in terms of winter absconding in a climate with cycles of warm days interspersed with cold days. These are compared with calculated values for scutellata to assess whether capensis might have a directional gene flow advantage over scutellata in their zone of hybridization.
- Full Text:
- Date Issued: 1993
- Authors: Hepburn, H Randall , Villet, Martin H , Jones, Georgina E , Carter, A , Simon, V , Coetzer, W
- Date: 1993
- Language: English
- Type: Article
- Identifier: vital:6862 , http://hdl.handle.net/10962/d1011154
- Description: The dispersal characteristics of the African honeybee, Apis mellifera scutellata, resulted in a greatly mobile hybrid front in the New World, but in Africa its hybridization zone with the Cape honeybee, Apis mellifera capensis, appears very stable.The maintenance of stable hybrid zones is predicated on a balance between dispersal and selection Knowledge on the extent of gene flow from either race is in its infancy, and the probability of successful dispersal by either race has not yet been considered. Both capensis and scutellata are notorious for absconding, capensis the more so for resource-related seasonal absconding in winter. The two races also differ fundamentally in the ways they conserve heat both behaviourally and physiologically. We investigated the energy consumption and colony survival characteristics of capensis in terms of winter absconding in a climate with cycles of warm days interspersed with cold days. These are compared with calculated values for scutellata to assess whether capensis might have a directional gene flow advantage over scutellata in their zone of hybridization.
- Full Text:
- Date Issued: 1993
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