Gynomimicry in the Dwarf Gwembe breed from Zambia
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Sexual size dimorphism is a widespread phenomenon in different animal taxa, including the subfamily of goats and sheep. The purpose of this research was to study the sexual dimorphism of males and females of Gwembe Dwarf Goat based solely on cephalic indexes. Eleven indices were calculated for 30 dry skulls of adult Gwembe Dwarf Goat specimens aged 18 months and older. Sexes appeared no significatively different. This form of heterosexual mimicry must be viewed as simply as strongly human-selected for. The importance of controlled competition is capable of countering antagonist to peer competition, so no sexual competition appears. When the artificial nature of sexual competition is taken into account, Darwin's theory of sexual selection becomes not applicable to domestic goats -or at least to the Dwarf Gwembe breed-, which fail to develop the expected degree of sexual dimorphism. The breed can then described as a monomorphic and, more concretely, gynomimic - imitation of female secondary sexual characters by males-.
Is part ofResearch, 2014, vol. 1, núm. 809
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Parés Casanova, Pere-Miquel; Kataba, A.; Mwaanga, Edwell S.; Simukoko, H. (Annex publishers, 2014-09-16)This study involved some morphometric parameters of the skull of thirty adult Gwembe Dwarf Goats (15 males and 15 females) without any apparent skeletal disorders. Lower jaws were not included in this study. A total of 43 ...
Mwaanga, Edwell S.; Kataba, A.; Parés Casanova, Pere-Miquel; Phiri, E.; Lundu, T. (Journal Issues, 2014-10-07)Although the Gwembe Dwarf (GD) is the most populous goat-breed in Zambia, not much reproductive information is available. In order to investigate sperm morphological characteristics, and their relationship to body and ...
Kataba, A.; Mwaanga, Edwell S.; Simukoko, H.; Parés Casanova, Pere-Miquel (Nnamdi Azikiwe University.Faculty of Agriculture, 2014-06-30)In this study, a total of 30 skulls of the Gwembe Valley Dwarf (GVD) goat were used. Clinical anatomical measurements for 12 parts of the skull were made. Additionally, the data obtained have been compared with those carried ...