1 |
Some aspects of male vervet monkey behaviourFreeman, Natalie J January 2012 (has links)
The permanent coresidence of males within a troop is unusual but occurs in vervet monkeys. Several hypotheses have been projected to explain the coexistence of male vervets (predation risk, breeding season length) but these hypotheses fall short in explaining the multimale nature of vervet monkeys. In order to determine the explanation for coresiding males, I collected male behavioural data from two troops over the course of nine months. My dataset was divided into two categories, male-male interactions and female-male interactions. The male-male data indicate that breeding season is the most active time for migration, aggressions and wounds. Coalitions were described for the first time, and affiliative interactions between males highlighted coping tactics of males in regards to their coexistence. The female-male data indicate there was little indication for distinct male or female choice for mating. Specifically, olfactory information appears to lower successful copulations of males, and female resistance also decreased successful copulations. Grooming was not a commodity traded for mating access. Male dominance was not correlated with mating success, and females seem to express their preference for sexual partners. The large cohort of males of my troops appears to alter behaviours observed at other sites. The maintenance of male-female associations after breeding season suggests that males may be preparing for next breeding season, and males may co-reside for breeding purposes. / xiii, 123 leaves : ill. maps ; 29 cm
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2 |
Contingency and context in the relationships of female vervet monkeysForshaw, Nicola L January 2011 (has links)
This study explored the organizing principles of female sociality in free-ranging vervet monkeys (Chlorocebus aethiops) inhabiting the Klein Karoo, South Africa. Females groomed more than males, grooming peaked at the end of the day and less grooming occurred during the mating season. Although females competed over food, they did not compete over grooming partners, rarely formed coalitions and did not trade grooming against other activities. Instead, they maintained grooming whilst trading between feeding and resting and feeding and moving. Despite seasonal shifts in food competition, grooming was not traded for tolerance and there was an upper limit to cohort size before clique size declined. Inter-population comparisons revealed no troop size effects on clique size, aggression and competition over high-ranking grooming partners. The rarity of coalitions suggests coalitions are unlikely to be a central component of female relationships. / xiii, 162 leaves : ill., maps ; 29 cm
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3 |
Population density, spatial dynamics and territoriality in vervet monkeysThomas, Brittany L, University of Lethbridge. Faculty of Arts and Science January 2013 (has links)
Vervet
monkeys
(Chlorocebus
pygerythrus)
are
generally
described
as
a
territorial
species,
though
variations
in
territoriality
have
been
observed.
This
research
examined
the
impact
of
high
population
density,
large
group
sizes
and
extensively
overlapping
home
ranges
on
the
expression
of
territoriality
in
a
population
of
vervet
monkeys.
Over
a
period
of
eighteen
months,
data
were
collected
on
three
large
troops
of
vervet
monkeys
(PTN
=
31,
RBMN
=
39,
RSTN
=
57)
on
the
Samara
Game
Reserve,
South
Africa.
I
examined
the
spatial
dynamics
demonstrated
in
this
population,
assed
the
extent
and
use
of
home
range
overlap
and
examined
the
occurrence
of
intertroop
encounters
in
relation
to
mate
defence,
resource
defence
and
home
range
defence.
The
home
ranges
of
the
troops
in
this
study
population
overlap
substantially,
and
overlap
areas
are
exploited
extensively.
The
frequency
of
occurrence
of
intertroop
encounters
does
not
increase
in
the
mating
season,
nor
is
there
evidence
of
the
defence
of
particular
food
patches
or
home
range
defence.
The
findings
from
this
thesis
emphasize
the
importance
of
examining
the
expression
of
territoriality
of
a
population
within
the
context
of
its
environment. / xvi, 125 leaves : ill. ; 29 cm
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4 |
Environmental effects on group structure and vigilance in vervet monkeysPasternak, Graham M January 2011 (has links)
Narrow riparian woodlands along non-perennial streams have made it possible for vervet monkeys to penetrate the semi-arid karoo ecosystem of South Africa, while artificial water points have more recently allowed these populations to colonize much more marginal habitat away from natural water sources. In order to determine the sequelae of life in these narrow, linear woodlands for historically 'natural' populations, I determined the size of troops in relation to their reliance on natural and artificial water sources and collected detailed data from two river-centred troops on activity, diet and ranging behaviour over an annual cycle. These data indicate that river-centred troops were distinctive primarily for their large group sizes and, consequently, their large adult cohorts, and the extent of home range overlap in what is regarded as a territorial
species. While large group size carried the corollary of increased day journey length and longer estimated interbirth intervals, there was little other indication of ecological stress. Specifically, the rate of predation appears to be lower than observed at other sites. Predation encounters here, encourage the use of predator vigilance rather than influencing the use of space within the habitat. The high density of Acacia karoo, which accounted for a third of annual foraging effort in what was a relatively depauperate floristic habitat, allows for an adequate energy intake for groups of this size. I ascribed the large group size and home range overlap to the inability of groups to undergo fission. / xiii, 79 leaves : ill., maps ; 29 cm
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5 |
On-site professional development: using differentiation to support instruction in middle school scienceLightbody, Mary 29 September 2004 (has links)
No description available.
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