M Clau
Biographic Data
| ID | 1424070 |
|---|---|
| NAME | M Clau |
| GIVEN NAMES | M |
| FAMILY NAME | Clau |
| SIGNATURE | CLAU M |
| AFFILIATIONS | University of Zurich |
| ORCID | 0000-0003-3841-6207 |
| VERIFIED | Yes |
| TOTAL WORKS | 11 |
| TOTAL CITATIONS | 38 |
| WORKS AS AUTHOR | 11 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 2003 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 3 |
No systematic difference in obesity susceptibility between two groups of zoo primates with distinct digestive physiologies
Global Data From Great Ape Zoo Populations Confirm a High Prevalence of Overweight Individuals
Great apes in zoos have a history of receiving diets resembling those of humans in industrialized societies, with ensuing obesity and comorbidities. We analyzed adult zoo body mass (BM) data of 1290 chimpanzees, 141 bonobos, 231 Bornean orangutans, 186 Sumatran orangutans, and 719 Western gorillas in comparison to BM of free‐ranging conspecifics. Females and males considered overweight or obese were 62% and 45% in chimpanzees, 14% and 3% in bonob…
Competition drives the evolution of emergent neutrality in the dietary niches of mammalian herbivores
Intraspecific macroscopic digestive anatomy of ring-tailed lemurs (Lemur catta), including a comparison of frozen and formalin-stored specimens
Digestive tract measurements are often considered species specific, but little information exists on the degree to which they change during ontogeny within a species. Additionally, access to anatomical material from nondomestic species is often limited, with fixed tissues possibly representing the only available source, though the degree to which this material is representative in terms of dimensions and weight is debatable. In the present study,…
Gross intestinal morphometry and allometry in primates
Although it is generally assumed that among mammals and within mammal groups, those species that rely on diets consisting of greater amounts of plant fiber have larger gastrointestinal tracts (GIT), statistical evidence for this simple claim is largely lacking. We compiled a dataset on the length of the small intestine, caecum, and colon in 42 strepsirrhine, platyrrhine, and catarrhine primate species, using specimens with known body mass (BM). W…
Dust affects chewing efficiency and tooth wear in forest dwelling Western chimpanzees ( Pan troglodytes verus )
OBJECTIVES: In humans it has been shown that abrasive particles in the diet result in increased tooth wear and less intense chewing behavior, both of which decrease chewing efficiency. This behavioral response may also exist in non-human primates as a means to reduce the wear effect of dust-laden food. Here we tested whether the periodical occurrence of abrasive dust particles in the diet of Western chimpanzees affects tooth wear and reduces chew…
Applying wet sieving fecal particle size measurement to frugivores
OBJECTIVES: Fecal particle size (FPS) as quantified by wet sieving analysis is a measure of chewing efficiency relevant for the understanding of physiological adaptations and constraints in herbivores. FPS has not been investigated systematically in frugivores, and important methodological problems remain. In particular, food items that are not chewed may skew estimates of FPS. We address such methodological issues and also assess the influence o…
Daily feeding rhythm in proboscis monkeys
Effects of dietary fracture toughness and dental wear on chewing efficiency in geladas ( T heropithecus gelada )
Chewing efficiency has been associated with fitness in mammals, yet little is known about the behavioral, ecological, and morphological factors that influence chewing efficiency in wild animals. Although research has established that dental wear and food material properties independently affect chewing efficiency, few studies have addressed the interaction among these factors. We examined chewing efficiency, measured as mean fecal particle size, …
Fecal Glucocorticoid Measurements and Their Relation to Rearing, Behavior, and Environmental Factors in the Population of Pileated Gibbons (Hylobates pileatus) Held in European Zoos
Increased iron absorption in lemurs
Iron storage disease (ISD) in lemurs has been reported since as early as the 1960s, and in the 1980s was demonstrated to be a consistent finding in postmortem investigations of captive lemurs. Since then this disease has consistently been diagnosed at the point of necropsy. In the current study we describe a preclinical screening procedure, as well as the quantified preventive effects of dietary intervention upon iron absorption. Twenty‐three ind…
Effects of dietary fracture toughness and dental wear on chewing efficiency in geladas ( T heropithecus gelada )
Chewing efficiency has been associated with fitness in mammals, yet little is known about the behavioral, ecological, and morphological factors that influence chewing efficiency in wild animals. Although research has established that dental wear and food material properties independently affect chewing efficiency, few studies have addressed the interaction among these factors. We examined chewing efficiency, measured as mean fecal particle size, …
Dust affects chewing efficiency and tooth wear in forest dwelling Western chimpanzees ( Pan troglodytes verus )
OBJECTIVES: In humans it has been shown that abrasive particles in the diet result in increased tooth wear and less intense chewing behavior, both of which decrease chewing efficiency. This behavioral response may also exist in non-human primates as a means to reduce the wear effect of dust-laden food. Here we tested whether the periodical occurrence of abrasive dust particles in the diet of Western chimpanzees affects tooth wear and reduces chew…
Fecal Glucocorticoid Measurements and Their Relation to Rearing, Behavior, and Environmental Factors in the Population of Pileated Gibbons (Hylobates pileatus) Held in European Zoos
Applying wet sieving fecal particle size measurement to frugivores
OBJECTIVES: Fecal particle size (FPS) as quantified by wet sieving analysis is a measure of chewing efficiency relevant for the understanding of physiological adaptations and constraints in herbivores. FPS has not been investigated systematically in frugivores, and important methodological problems remain. In particular, food items that are not chewed may skew estimates of FPS. We address such methodological issues and also assess the influence o…
Increased iron absorption in lemurs
Iron storage disease (ISD) in lemurs has been reported since as early as the 1960s, and in the 1980s was demonstrated to be a consistent finding in postmortem investigations of captive lemurs. Since then this disease has consistently been diagnosed at the point of necropsy. In the current study we describe a preclinical screening procedure, as well as the quantified preventive effects of dietary intervention upon iron absorption. Twenty‐three ind…
Fecal Glucocorticoid Measurements and Their Relation to Rearing, Behavior, and Environmental Factors in the Population of Pileated Gibbons (Hylobates pileatus) Held in European Zoos
Daily feeding rhythm in proboscis monkeys
Effects of dietary fracture toughness and dental wear on chewing efficiency in geladas ( T heropithecus gelada )
Chewing efficiency has been associated with fitness in mammals, yet little is known about the behavioral, ecological, and morphological factors that influence chewing efficiency in wild animals. Although research has established that dental wear and food material properties independently affect chewing efficiency, few studies have addressed the interaction among these factors. We examined chewing efficiency, measured as mean fecal particle size, …
Applying wet sieving fecal particle size measurement to frugivores
OBJECTIVES: Fecal particle size (FPS) as quantified by wet sieving analysis is a measure of chewing efficiency relevant for the understanding of physiological adaptations and constraints in herbivores. FPS has not been investigated systematically in frugivores, and important methodological problems remain. In particular, food items that are not chewed may skew estimates of FPS. We address such methodological issues and also assess the influence o…
Gross intestinal morphometry and allometry in primates
Although it is generally assumed that among mammals and within mammal groups, those species that rely on diets consisting of greater amounts of plant fiber have larger gastrointestinal tracts (GIT), statistical evidence for this simple claim is largely lacking. We compiled a dataset on the length of the small intestine, caecum, and colon in 42 strepsirrhine, platyrrhine, and catarrhine primate species, using specimens with known body mass (BM). W…
Dust affects chewing efficiency and tooth wear in forest dwelling Western chimpanzees ( Pan troglodytes verus )
OBJECTIVES: In humans it has been shown that abrasive particles in the diet result in increased tooth wear and less intense chewing behavior, both of which decrease chewing efficiency. This behavioral response may also exist in non-human primates as a means to reduce the wear effect of dust-laden food. Here we tested whether the periodical occurrence of abrasive dust particles in the diet of Western chimpanzees affects tooth wear and reduces chew…
Intraspecific macroscopic digestive anatomy of ring-tailed lemurs (Lemur catta), including a comparison of frozen and formalin-stored specimens
Digestive tract measurements are often considered species specific, but little information exists on the degree to which they change during ontogeny within a species. Additionally, access to anatomical material from nondomestic species is often limited, with fixed tissues possibly representing the only available source, though the degree to which this material is representative in terms of dimensions and weight is debatable. In the present study,…
Competition drives the evolution of emergent neutrality in the dietary niches of mammalian herbivores
No systematic difference in obesity susceptibility between two groups of zoo primates with distinct digestive physiologies
Global Data From Great Ape Zoo Populations Confirm a High Prevalence of Overweight Individuals
Great apes in zoos have a history of receiving diets resembling those of humans in industrialized societies, with ensuing obesity and comorbidities. We analyzed adult zoo body mass (BM) data of 1290 chimpanzees, 141 bonobos, 231 Bornean orangutans, 186 Sumatran orangutans, and 719 Western gorillas in comparison to BM of free‐ranging conspecifics. Females and males considered overweight or obese were 62% and 45% in chimpanzees, 14% and 3% in bonob…
Biology (9 works) · Primate Behavior and Ecology (9 works) · Ecology (7 works) · Primate (6 works) · Zoology (6 works) · Ecology (5 works) · Animal Behavior and Welfare Studies (3 works) · Animal ecology (3 works) · Animal science (3 works) · Habitat (3 works)