Sexual selection and endocrine profiles in wild South African giraffe ( Giraffa camelopardalis giraffa )

2020 ◽  
Author(s):  
Ciska P. J. Scheijen ◽  
Fred B. Bercovitch ◽  
Ilse Luther‐Binoir ◽  
Andre Ganswindt ◽  
Francois Deacon
Keyword(s):  
Sexual Selection ◽  
South African ◽  
Giraffa Camelopardalis ◽  
Endocrine Profiles

scholarly journals Feeding ecology and sexual dimorphism in a speciose flower beetle clade (Hopliini: Scarabaeidae)

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e4632 ◽  
Author(s):  
Jonathan F. Colville ◽  
Mike D. Picker ◽  
Richard M. Cowling
Keyword(s):  
Sexual Selection ◽  
Sexual Dimorphism ◽  
South African ◽  
Feeding Ecology ◽  
Scoring System ◽  
Feeding Guilds ◽  
Feeding Guild ◽  
Visual Signalling ◽  
Almost All ◽  
Feeding Resources

The relationship between feeding ecology and sexual dimorphism is examined in a speciose South African monkey beetle clade. We test whether feeding and mating at a fixed site (embedding guild) is associated with greater levels of sexual dimorphism and possibly sexual selection than species using unpredictable feeding resources (non-embedding guild). Sexual dimorphism was measured using a point scoring system for hind leg and colour across the two feeding guilds for >50% of the regional fauna. Quantification of hind leg dimorphism using a scoring system and allometric scaling were used to identify traits subject to sexual selection. Feeding guild had a significant effect on hind leg dimorphism, with embedders having high and non-embedders low scores. The sessile and defendable distribution of females on stable platform flowers may favour contests and associated hind leg weaponry. In contrast, degree of colour dimorphism between the sexes was not associated with any particular feeding guild, and may serve to reduce male conflict and combat. Embedder males had high proportions (∼76%) of species with positive allometric slopes for almost all hind leg traits. For male non-embedders, only ∼37% of species showed positive scaling relationships. Phylogenetic data, in conjunction with behavioural data on the function of leg weaponry and visual signalling among males is needed to better understand the link between sexual dimorphism and sexual selection in the radiation of the monkey beetles.

scholarly journals The South African giraffe Giraffa camelopardalis giraffa: a conservation success story

Oryx ◽  
2018 ◽  
Vol 53 (1) ◽  
pp. 45-48 ◽  
Author(s):  
Francois Deacon ◽  
Andy Tutchings
Keyword(s):  
South African ◽  
National Park ◽  
Total Population ◽  
Private Ownership ◽  
Conservation Priority ◽  
The South ◽  
Success Story ◽  
Giraffa Camelopardalis ◽  
Monitoring And Surveillance ◽  
Privately Owned

AbstractAcross Africa the majority of giraffe species and subspecies are in decline, whereas the South African giraffe Giraffa camelopardalis giraffa remains numerous and widespread throughout southern Africa. By 2013 the number of giraffes in South Africa's Kruger National Park had increased by c. 150% compared to 1979 estimates. An even greater increase occurred on many of the estimated 12,000 privately owned game ranches, indicating that private ownership can help to conserve this subspecies. The estimated total population size in South Africa is 21,053–26,919. The challenge now is to implement monitoring and surveillance of G. camelopardalis giraffa as a conservation priority and to introduce sustainable practices among private owners to increase numbers and genetic variation within in-country subspecies.

scholarly journals Identification of novel Babesia and Theileria species in South African giraffe (Giraffa camelopardalis, Linnaeus, 1758) and roan antelope (Hippotragus equinus, Desmarest 1804)

2009 ◽  
Vol 163 (1-2) ◽  
pp. 39-46 ◽  
Author(s):  
Marinda C. Oosthuizen ◽  
Basil A. Allsopp ◽  
Milana Troskie ◽  
Nicola E. Collins ◽  
Barend L. Penzhorn
Keyword(s):  
South African ◽  
Giraffa Camelopardalis ◽  
Roan Antelope ◽  
Hippotragus Equinus

The Three-dimensional structure of frozen-hydrated nudaurelia capensis β virus

1987 ◽  
Vol 45 ◽  
pp. 650-651
Author(s):  
N. H. Olson ◽  
T. S. Baker ◽  
Wu Bo Mu ◽  
J. E. Johnson ◽  
D. A. Hendry
Keyword(s):  
South African ◽  
Rna Virus ◽  
Carbon Film ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Electron Dose ◽  
Total Electron ◽  
Three Dimensional Structure ◽  
Negative Stain ◽  
Dimensional Reconstruction

Nudaurelia capensis β virus (NβV) is an RNA virus of the South African Pine Emperor moth, Nudaurelia cytherea capensis (Lepidoptera: Saturniidae). The NβV capsid is a T = 4 icosahedron that contains 60T = 240 subunits of the coat protein (Mr = 61,000). A three-dimensional reconstruction of the NβV capsid was previously computed from visions embedded in negative stain suspended over holes in a carbon film. We have re-examined the three-dimensional structure of NβV, using cryo-microscopy to examine the native, unstained structure of the virion and to provide a initial phasing model for high-resolution x-ray crystallographic studiesNβV was purified and prepared for cryo-microscopy as described. Micrographs were recorded ∼1 - 2 μm underfocus at a magnification of 49,000X with a total electron dose of about 1800 e-/nm2.

Suicidal Behavior in Black South Africans

Crisis ◽  
2003 ◽  
Vol 24 (1) ◽  
pp. 24-28 ◽  
Author(s):  
Lourens Schlebusch ◽  
Naseema B.M. Vawda ◽  
Brenda A. Bosch
Keyword(s):  
South African ◽  
Suicidal Behavior ◽  
Health Care Facilities ◽  
South African Society ◽  
South Africans ◽  
The Past ◽  
The People ◽  
Care Facilities ◽  
Black South Africans ◽  
To Come

Summary: In the past suicidal behavior among Black South Africans has been largely underresearched. Earlier studies among the other main ethnic groups in the country showed suicidal behavior in those groups to be a serious problem. This article briefly reviews some of the more recent research on suicidal behavior in Black South Africans. The results indicate an apparent increase in suicidal behavior in this group. Several explanations are offered for the change in suicidal behavior in the reported clinical populations. This includes past difficulties for all South Africans to access health care facilities in the Apartheid (legal racial separation) era, and present difficulties of post-Apartheid transformation the South African society is undergoing, as the people struggle to come to terms with the deleterious effects of the former South African racial policies, related socio-cultural, socio-economic, and other pressures.

Does Psychology “Matter”? An Analysis of “Relevance” in South African Psychology

PsycCRITIQUES ◽  
2017 ◽  
Vol 62 (6) ◽  
Author(s):  
Brian W. Becker ◽  
Heather Macdonald
Keyword(s):  
South African
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