A5075550069- Primate Behavior and Ecology
- Animal Behavior and Reproduction
- Animal Vocal Communication and Behavior
- Wildlife Ecology and Conservation
- Human-Animal Interaction Studies
- History and Developments in Astronomy
- Evolutionary Psychology and Human Behavior
- Neuroendocrine regulation and behavior
- Yersinia bacterium, plague, ectoparasites research
- Bat Biology and Ecology Studies
- Face Recognition and Perception
- Historical Astronomy and Related Studies
- Radioactive Decay and Measurement Techniques
- Amphibian and Reptile Biology
- Rabies epidemiology and control
- Logic, programming, and type systems
- Classical Antiquity Studies
- Marine animal studies overview
- Experimental and Theoretical Physics Studies
- Advanced Algebra and Logic
- Classical Philosophy and Thought
The Dian Fossey Gorilla Fund International
2009-2023
International Gorilla Conservation Programme
2020-2022
Since the 1980s, Virunga mountain gorilla population has almost doubled, now reaching 480 individuals living in a 430-km(2) protected area. Analysis of gorillas' ranging patterns can provide critical information on extent and possible effects competition for food space. We analyzed 12 years daily data inter-group encounter collected 11 groups monitored by Karisoke Research Center Rwanda. During that period, study increased size 50% number tripled. Groups had small yearly home ranges compared...
Abstract In humans and chimpanzees, most intraspecific killing occurs during coalitionary intergroup conflict. the closely related genus Gorilla, such behavior has not been described. We report three cases of multi-male, multi-female wild mountain gorilla ( G. beringei ) groups attacking extra-group males. The was strikingly similar to reports in but never observed gorillas until after a demographic transition left ~25% population living large social with multiple (3+) Resource competition...
Mothers are crucial for mammals’ survival before nutritional independence, but many social mammals reside with their mothers long after. In these species the adversity caused by maternal loss later in life can dramatically reduce fitness. However, some human populations negative consequences be overcome care from other group members. We investigated of mountain gorillas and found no discernible fitness costs to through survival, age at first birth, or offspring infancy. Social network...
Socioecological models predict that contest competition will arise when high quality foods can be usurped or monopolized, leading to more favorable energy balances and higher reproductive success for high-ranking females. Gorillas are interesting species studying such predictions due the variety of ecological conditions they experience in different locations. Using data from 23 female mountain gorillas 3 social groups Virunga Massif, we examined food characteristics may influence (food site...
Density-dependent processes such as competition for resources, migration, predation, and disease outbreaks limit the growth of natural populations. The analysis 50 years mountain gorilla data reveals that social behavior changes observed at high group density may also affect population in species. A sudden increase 2007 caused a threefold rate violent encounters between units (groups solitary males). fivefold infanticide seven cases lethal fights among mature males were subsequently...
ABSTRACT Objectives Ecological factors have a dramatic effect on tooth wear in primates, although it remains unclear how individual age contributes to functional crown morphology. The aim of this study is determine and diet are related wild mountain gorillas ( Gorilla beringei ) from Volcanoes National Park, Rwanda. Material Methods We calculated the percent dentine exposure (PDE) for all permanent molars (M1–M3) known‐age N = 23), test whether PDE varied with using regression analysis. For...
The effect of feeding competition on foraging efficiency is an important link between ecological factors and the social organization gregarious species. We examined effects group size daily travel distances, activity budgets, energy intake mountain gorillas in Rwanda. measured distances five groups, budgets 79 nine data for 23 adult females three groups over a 16-month period. Travel proportion time spent traveling increased with most which would be expected if their limited by intragroup...
Several theories have been proposed to explain the impact of ecological conditions on differences in life history variables within and between species. Here we compare female parameters one western lowland gorilla population (Gorilla gorilla) two mountain populations beringei beringei).
Humans were once considered unique in having a concept of death but growing number observations animal responses to dying and dead conspecifics suggests otherwise. Complex arrays behaviors have been described ranging from corpse removal burial among social insects quiet attendance caregiving elephants primates. Less frequently described, however, are behavioral individuals different age/sex classes or position toward the conspecifics. We describe mountain gorillas (Gorilla beringei beringei)...
Many species show territoriality, in which territory owners have exclusive or priority use of a region. In humans, tolerance others within our space also depends greatly on social relationships with them. This has been hypothesized as one potential driver the evolution long-term, inter-group relationships, through enabling shared access resources and easing disputes over space. However, extremely little is known about importance between neighbouring groups non-humans for how used shared....
Abstract Whilst the conservation impacts of density‐dependent population effects have been well studied, impact that socially‐driven changes (e.g. group fissions increase density) can on growth in social species only recently come to light. An density and intergroup encounters a subpopulation mountain gorillas Gorilla beringei was shown driven more than fourfold infanticide, slowing growth. In this study, we delve deeper into consequences these density, examining how patterns reproduction...
Eastern gorillas (Gorilla beringei) are among the few mammal species that seasonally consume large quantities of young bamboo shoots, which a rich source energy. Here, we document how consumption shoots coincides with changes in behavior adult mountain beringei monitored by Dian Fossey Gorilla Fund’s Karisoke Research Center Volcanoes National Park, Rwanda. We offer preliminary analysis possible mechanisms underlying this behavioral change measuring energy intake rates and presence cyanide...
Abstract Space use in mammals may be influenced not only by their primary foods, but also localized sources of physiologically critical resources such as sodium‐rich plants. We examined how sodium acquisition influences habitat mountain gorillas ( Gorilla beringei ) Rwanda which have increased the amount time they forage on community land outside Volcanoes National Park VNP ), where eucalyptus Eucalyptus spp.) tree bark is most frequently eaten food. measured content samples from 34 main...
Objectives Ecological factors, but also tooth‐to‐tooth contact over time, have a dramatic effect on tooth wear in primates. The aim of this study is to test whether incisor changes predictably with age and can thus be used as an estimation method wild population mountain gorillas ( Gorilla beringei ) from Volcanoes National Park, Rwanda. Materials methods In confidently known chronological N = 24), we measured the crown height all permanent maxillary mandibular incisors (I 1 , I 2 proxy for...
Abstract Mothers are crucial for mammals’ survival before nutritional independence, but many social mammals reside with their mothers long after. In these species the adversity caused by maternal loss later in life can dramatically reduce fitness. However, some human populations negative consequences appear to be overcome care from other group members. We investigated of mountain gorillas and found no discernible fitness costs through survival, age at first birth or offspring infancy. Social...