Sylvia Ortmann
Biographic Data
| ID | 3837887 |
|---|---|
| NAME | Sylvia Ortmann |
| GIVEN NAMES | Sylvia |
| FAMILY NAME | Ortmann |
| SIGNATURE | ORTMANN S |
| AFFILIATIONS | Leibniz Institute for Zoo and Wildlife Research |
| ORCID | 0000-0003-2520-6251 |
| VERIFIED | Yes |
| TOTAL WORKS | 9 |
| TOTAL CITATIONS | 37 |
| WORKS AS AUTHOR | 9 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 2008 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 3 |
The nutritional quality of male chimpanzee diets in a semiarid savanna
Importance of subterranean fungi in the diet of bonobos in Kokolopori
Nonstaple food is a food resource which sole consumption does not allow the maintenance of regular physiological functions, thus constituting a minor portion of an individual's diet. Many primates consume nonstaple food such as meat, insects, and fungi. Hypotheses on the dietary importance of nonstaple food include its role as fallback food and as source of specific nutrients. We tested these two hypotheses by investigating mycophagy (i.e., the c…
Western chimpanzees ( Pan troglodytes verus ) access a nutritionally balanced, high energy, and abundant food, baobab ( Adansonia digitata ) fruit, with extractive foraging and reingestion
Intrinsic to several hypotheses explaining the evolution of foraging behavior complexity, such as proto‐tool use, is the assumption that more complex ingestive behaviors are adaptations allowing individuals to access difficult to procure but nutritionally or energetically rewarding foods. However, nutritional approaches to understanding this complexity have been underutilized. The goal of this study was to evaluate potential nutritional determina…
Social and ecological correlates of space use patterns in Bwindi mountain gorillas
Space use patterns determine access to resources necessary for survival and reproduction. Although it is recognized that the interplay between social and ecological variables shapes spacing patterns, few studies in group-living animals have simultaneously assessed their importance in a comprehensive approach using different spatiotemporal space use measures. In territorial species, such patterns are strongly determined by between-group competitio…
Variability in Population Density Is Paralleled by Large Differences in Foraging Efficiency in Chimpanzees (Pan troglodytes)
Energetic responses to variation in food availability in the two mountain gorilla populations ( Gorilla beringei beringei )
OBJECTIVE: Here, we compare food availability and relate this to differences in energy intake rates, time spent feeding, and daily travel distance of gorillas in the two populations. Comparative intraspecific studies investigating spatiotemporal variation in food availability can help us understand the complex relationships between ecology, behavior, and life history in primates and are relevant to understanding hominin evolution. Differences in …
Plant foods consumed by Pan
It has been shown that differences in resource density and nutrient supply affect variation in ranging patterns, habitat use, and sociality. Among nonhuman primates, chimpanzees ( Pan troglodytes ) and bonobos ( P. paniscus ) have often been used as models for the link between social system and habitat ecology. Field reports suggest that resource density is higher in habitats occupied by bonobos (compared to chimpanzee habitats), and in the West …
Daily Energy Balance and Protein Gain Among Pan troglodytes verus in the Taï National Park, Côte d’Ivoire
Energy balance and protein gain contribute significantly to an animal's survival. Although data are available for certain species in captive settings, there is little information on these factors for primates living in their natural environments. In this preliminary study, we combined detailed behavioral, phonological, and chemical data for a well habituated chimpanzee community from the Ta National Park, Cte d'Ivoire, with estimates of energy ga…
Food preferences of wild mountain gorillas
Determining the nutritional and phenolic basis of food preference is important for understanding the nutritional requirements of animals. Preference is a measure of which foods would be consumed by an animal if there was no variation in availability among food items. From September 2004 to August 2005, we measured the food preferences of four wild mountain gorilla groups that consume foliage and fruit in Bwindi Impenetrable National Park, Uganda,…
Plant foods consumed by Pan
It has been shown that differences in resource density and nutrient supply affect variation in ranging patterns, habitat use, and sociality. Among nonhuman primates, chimpanzees ( Pan troglodytes ) and bonobos ( P. paniscus ) have often been used as models for the link between social system and habitat ecology. Field reports suggest that resource density is higher in habitats occupied by bonobos (compared to chimpanzee habitats), and in the West …
Energetic responses to variation in food availability in the two mountain gorilla populations ( Gorilla beringei beringei )
OBJECTIVE: Here, we compare food availability and relate this to differences in energy intake rates, time spent feeding, and daily travel distance of gorillas in the two populations. Comparative intraspecific studies investigating spatiotemporal variation in food availability can help us understand the complex relationships between ecology, behavior, and life history in primates and are relevant to understanding hominin evolution. Differences in …
Daily Energy Balance and Protein Gain Among Pan troglodytes verus in the Taï National Park, Côte d’Ivoire
Energy balance and protein gain contribute significantly to an animal's survival. Although data are available for certain species in captive settings, there is little information on these factors for primates living in their natural environments. In this preliminary study, we combined detailed behavioral, phonological, and chemical data for a well habituated chimpanzee community from the Ta National Park, Cte d'Ivoire, with estimates of energy ga…
Variability in Population Density Is Paralleled by Large Differences in Foraging Efficiency in Chimpanzees (Pan troglodytes)
Food preferences of wild mountain gorillas
Determining the nutritional and phenolic basis of food preference is important for understanding the nutritional requirements of animals. Preference is a measure of which foods would be consumed by an animal if there was no variation in availability among food items. From September 2004 to August 2005, we measured the food preferences of four wild mountain gorilla groups that consume foliage and fruit in Bwindi Impenetrable National Park, Uganda,…
Daily Energy Balance and Protein Gain Among Pan troglodytes verus in the Taï National Park, Côte d’Ivoire
Energy balance and protein gain contribute significantly to an animal's survival. Although data are available for certain species in captive settings, there is little information on these factors for primates living in their natural environments. In this preliminary study, we combined detailed behavioral, phonological, and chemical data for a well habituated chimpanzee community from the Ta National Park, Cte d'Ivoire, with estimates of energy ga…
Plant foods consumed by Pan
It has been shown that differences in resource density and nutrient supply affect variation in ranging patterns, habitat use, and sociality. Among nonhuman primates, chimpanzees ( Pan troglodytes ) and bonobos ( P. paniscus ) have often been used as models for the link between social system and habitat ecology. Field reports suggest that resource density is higher in habitats occupied by bonobos (compared to chimpanzee habitats), and in the West …
Variability in Population Density Is Paralleled by Large Differences in Foraging Efficiency in Chimpanzees (Pan troglodytes)
Energetic responses to variation in food availability in the two mountain gorilla populations ( Gorilla beringei beringei )
OBJECTIVE: Here, we compare food availability and relate this to differences in energy intake rates, time spent feeding, and daily travel distance of gorillas in the two populations. Comparative intraspecific studies investigating spatiotemporal variation in food availability can help us understand the complex relationships between ecology, behavior, and life history in primates and are relevant to understanding hominin evolution. Differences in …
Social and ecological correlates of space use patterns in Bwindi mountain gorillas
Space use patterns determine access to resources necessary for survival and reproduction. Although it is recognized that the interplay between social and ecological variables shapes spacing patterns, few studies in group-living animals have simultaneously assessed their importance in a comprehensive approach using different spatiotemporal space use measures. In territorial species, such patterns are strongly determined by between-group competitio…
Importance of subterranean fungi in the diet of bonobos in Kokolopori
Nonstaple food is a food resource which sole consumption does not allow the maintenance of regular physiological functions, thus constituting a minor portion of an individual's diet. Many primates consume nonstaple food such as meat, insects, and fungi. Hypotheses on the dietary importance of nonstaple food include its role as fallback food and as source of specific nutrients. We tested these two hypotheses by investigating mycophagy (i.e., the c…
Western chimpanzees ( Pan troglodytes verus ) access a nutritionally balanced, high energy, and abundant food, baobab ( Adansonia digitata ) fruit, with extractive foraging and reingestion
Intrinsic to several hypotheses explaining the evolution of foraging behavior complexity, such as proto‐tool use, is the assumption that more complex ingestive behaviors are adaptations allowing individuals to access difficult to procure but nutritionally or energetically rewarding foods. However, nutritional approaches to understanding this complexity have been underutilized. The goal of this study was to evaluate potential nutritional determina…
The nutritional quality of male chimpanzee diets in a semiarid savanna
Biology (9 works) · Ecology (9 works) · Primate Behavior and Ecology (9 works) · Demography (5 works) · Geography (5 works) · Population (5 works) · Habitat (4 works) · National park (4 works) · Troglodytes (4 works) · Wildlife Ecology and Conservation (4 works)