Archivos de diario de octubre 2022

29 de octubre de 2022

In-Field Observations of Chacma Baboon (Papio ursinus) Troop in southern limits of Golden Gate Highlands National Park

Diet

Leaf culms:
=Xerophyta sp.
=Poaceae FAMILY (e.g Aristida sp.)

Inflorescences:
=Scila natalensis (bitten off with incissors 3-8cm above the stalk base)
<> Bulb of S. natalensis very toxic to humans, toxins can be found in early growth flower stalks
anecdotal evidence of olfactory adaptations of Chacma Baboon to distinguish between
accumulations and absence of digestive inhibitors in differentiated plant tissue
[refer also to mechanical removal of Watsonia culms in the Cape region]

Behaviour
1.
<>Early oestrus females consorting with young, low-ranking males, give a post-copulatory vocalization differing in pitch and frequency to conspecifics in Western Cape and Cape Peninsula
<> Many possible explanations for vocalization difference: e.g. necessitated acoustic change in response to varied topography, changes in ambient range dependant on time of day as the 2 most likely
<> Post-copulus call seperated into 2 distinct parts
+ last part of call becomes longer after successive matings with the same individual
- original thought: mate declaration adaption by lower-ranking female to inform alpha/ rest of troop of successive and progressive consorting relative to peak receptiveness, as a function of pin-pointing paternity to reduce the likelihood of erroneous and costly infanticide [would require co-function with theorized mediation of female interaction by dominant male/s (Palombit et al., 1999.)]
<>With all available evidence, points to directional post-copulatory mate selection, suggests little or no genotypic consideration or sperm competition

2.
<>2-3 individuals, alpha male included, make vocalizations every 2-5 minutes, with alpha often making the last call to terminate the sequence
<>Multiple-source calls possibly a way for lagging troop members, alpha and lookouts to triangulate a moving positional average toward which the troop will move, or around which they congregate and mediate with the direction of the alpha in the face of environmental obstacles or perceived danger.
-[Would appendice the known ability of Chacma Baboons to map out their range topologically in place of using Euclidean geometries (De Raad, A.L., Hill, R.A., 2019)]

3.
<>Subdominant males are found more often on troop periphery [Evidenced in Kamberg Nature Reserve and Golden Gate NP Troops], and stay within earshot of fringe troop members, possibly attempting to occasionally pull low-ranking females away to venture out in search of unexplored food patches (potential troop fision?). Troop itself usually spread out over large areas in mountainous terrain, with broad interspersions between social clusters.

Publicado el 29 de octubre de 2022 por anthonywalton anthonywalton | 0 comentarios | Deja un comentario
Vida Silvestre es una entidad asociada a la Organización Mundial de Conservación