E Zimmermann
Biographic Data
| ID | 18801 |
|---|---|
| NAME | E Zimmermann |
| GIVEN NAMES | E |
| FAMILY NAME | Zimmermann |
| SIGNATURE | ZIMMERMANN E |
| AFFILIATIONS | University of Veterinary Medicine Hannover, Foundation |
| ORCID | 0000-0002-3714-4281 |
| VERIFIED | Yes |
| TOTAL WORKS | 45 |
| TOTAL CITATIONS | 157 |
| AUTHOR COUNT | 45 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1972 |
| LATEST PUBLICATION YEAR | 2023 |
| H-INDEX | 8 |
Christoph Marx: The Anxieties of White Supremacy. Hendrik Verwoerd and the apartheid mindset
An empirical estimate of the generation time of mouse lemurs
The generation time of organisms drives the rate of change in populations and across evolutionary times. In long‐lived species, generation time should also account for overlapping generations, and the average age of parents has been proposed as a best approximation under these conditions. This study uses this definition to estimate the generation time of a widely studied small primate, Microcebus murinus , based on parentage data generated for a …
High frequency/ultrasonic communication in a critically endangered nocturnal primate, Claire's mouse lemur ( Microcebus mamiratra )
The critically endangered Claire's mouse lemur, only found in the evergreen rain forest of the National Park Lokobe (LNP) and a few lowland evergreen rain forest fragments of northern Madagascar, was described recently. The present study provides the first quantified information on vocal acoustics of calls, sound associated behavioral context, acoustic niche, and vocal activity of this species. We recorded vocal and social behavior of six male-fe…
The role of acoustic signaling for spacing and group coordination in a nocturnal, pair‐living primate, the western woolly lemur ( Avahi occidentalis )
OBJECTIVES: How social groups govern their distribution in time and space is a central question in socioecology. The aim of this study is to explore the role of acoustic signaling for spacing and cohesiveness in a nocturnal, cohesive, pair-living strepsirrhine. MATERIAL AND METHODS: The study was conducted in northwestern Madagascar. Six pairs of Avahi occidentalis were radio-collared and home range usage, vocalizations and call-associated behavi…
Shades of gray mouse lemurs: Ontogeny of female dominance and dominance‐related behaviors in a nocturnal primate
The ontogeny and establishment of dominance relationships in young individuals have been investigated in various group-living, diurnal primates but respective information is almost entirely lacking for nocturnal, non-gregarious species. As in many other mammals male primates often represent the dominant sex, but the opposite phenomenon (female dominance) is particularly frequent in lemurs, although almost nothing is known about its development. T…
Need for speed: Sexual maturation precedes social maturation in gray mouse lemurs
Screams in the Night: Pilot Study Reveals Moderate Evidence for Individual Differences in Lorisoid Vocalizations
Vocal acoustics in the endangered proboscis monkey ( Nasalis larvatus )
The endangered proboscis monkey (Nasalis larvatus) is a sexually highly dimorphic Old World primate endemic to the island of Borneo. Previous studies focused mainly on its ecology and behavior, but knowledge of its vocalizations is limited. The present study provides quantified information on vocal rate and on the vocal acoustics of the prominent calls of this species. We audio-recorded vocal behavior of 10 groups over two 4-month periods at the …
Species concepts, diversity, and evolution in primates: Lessons to be learned from mouse lemurs
Humans primarily rely on vision when categorizing the world. If you just look at the same-sized but strikingly differently colored Neotropical poison-dart frogs such as strawberry frogs (Fig. ), you would be convinced that they must belong to different species. However, this is an excellent example of a polymorphic species, meaning that although these frogs look quite different, mating decisions are made based on their conspicuous and species-spe…
Primate Life Histories
OrangFacs: A Muscle-Based Facial Movement Coding System for Orangutans (Pongo spp.)
Affect intensity in voice recognized by tree shrews (Tupaia belangeri)
Shared acoustic cues in speech, music, and nonverbal emotional expressions were postulated to code for emotion quality and intensity favoring the hypothesis of a prehuman origin of affective prosody in human emotional communication. To explore this hypothesis, we examined in playback experiments using a habituation-dishabituation paradigm whether a solitary foraging, highly vocal mammal, the tree shrew, is able to discriminate two behaviorally de…
Seasonal Effects on Sleeping Site Ecology in a Nocturnal Pair-Living Lemur (Avahi occidentalis)
Peaceful primates: Affiliation, aggression, and the question of female dominance in a nocturnal pair‐living lemur ( Avahi occidentalis )
Affiliation/agonism and social dominance are central factors determining social organization in primates. The aim of our study is to investigate and describe, for the first time, the intersexual relations in a nocturnal and cohesive pair‐living prosimian primate, the western woolly lemur ( Avahi occidentalis ), and to determine to what extent phylogeny, activity mode, or the cohesiveness of pair partners shape the quality of social interactions. …
Duetting—A mechanism to strengthen pair bonds in a dispersed pair‐living primate ( Lepilemur edwardsi )
Duetting is defined as an interactively organized pair display in which one pair partner coordinates its vocalizations in time with those of the other. It is widespread among tropical birds and cohesive pair‐living primates, in which it is suggested to strengthen pair bonds. We know very little about the presence and function of duetting in dispersed pair‐living mammals. We studied duetting behavior in a solitary foraging, but pair‐sleeping, prim…
Wild mouse lemurs revisit artificial feeding platforms: Implications for field experiments on sensory and cognitive abilities in small primates
Dealing effectively with space to find important resources in a natural environment is a fundamental ability necessary for survival. Evidence has already been provided that wild gray mouse lemurs revisit stationary feeding sites regularly. In this study, we explore to what extent two sympatric mouse lemur species, Microcebus murinus and M. ravelobensis , revisited artificial feeding sites during a period of food scarcity. As the tested population…
Sleeping site ecology in a rain‐forest dwelling nocturnal lemur ( Lepilemur mustelinus ): Implications for sociality and conservation
Suitable sleeping sites as potentially restricted resources are suggested to shape sociality in primates. We investigated sleeping site ecology of a rain‐forest dwelling sportive lemur in eastern Madagascar for the first time. Using radiotelemetry, we characterized the type, quality and usage of sleeping sites as well as social sleeping habits of 11 focal individuals of the weasel sportive lemur ( Lepilemur mustelinus ) during the dry and the ons…
Geographic variation in loud calls of sportive lemurs ( Lepilemur ssp .) and their implications for conservation
Bioacoustical studies in nonhuman primates have shown that loud calls can be reliably used as a noninvasive diagnostic tool for discriminating cryptic taxa, for their monitoring in the field as well as for the reconstruction of their phylogeny. To date, it is unknown, whether loud calls can be used for these purposes in sportive lemurs, for which current genetic studies suggest the existence of at least 24 cryptic species. The aim of this study w…
Primate Life Histories
First evidence for relocation of stationary food resources during foraging in a strepsirhine primate ( Microcebus murinus )
Field observations suggest that the diet of the Malagasy gray mouse lemur consists not only of non‐stationary animal prey (invertebrates or small vertebrates), but also of stationary food resources such as gum or homopteran larvae secretions (HLS). We studied the foraging behavior of five mouse lemurs radiotelemetrically, each during six consecutive nights in the dry season, to explore to which extent they use these food resources and whether the…
Seasonality in Reproduction of Lepilemur edwardsi
Experience‐dependent recapture rates and reproductive success in male grey mouse lemurs ( Microcebus murinus )
Male mating tactics can vary according to the potential for scramble or contest competition but also as a consequence of individual characteristics, such as body condition and previous experience. The influence of experience, i.e., residency, on male recapture rates and reproductive success was studied in a population of free‐living grey mouse lemurs. Long‐term capture data from 320 individuals revealed that both sexes had very low recapture prob…
Feeding Ecology of Sympatric Mouse Lemur Species in Northwestern Madagascar
Loud calling, spacing, and cohesiveness in a nocturnal primate, the Milne Edwards' sportive lemur ( Lepilemur edwardsi )
Dispersed pair‐living primates provide a unique model for illuminating the evolution of mechanisms regulating spacing and cohesiveness in permanently cohesive groups. We present for the first time data on the spatiotemporal distribution and loud‐calling behavior of the Milne Edwards' sportive lemur, known to forage solitarily during the night, but to form stable male‐female sleeping groups during the day. Data include radio‐tracking observations …
First experimental evidence for female mate choice in a nocturnal primate
Pair‐specific usage of sleeping sites and their implications for social organization in a nocturnal Malagasy primate, the Milne Edwards' sportive lemur ( Lepilemur edwardsi )
Safe sleeping sites may be a limited resource crucial for survival. In order to investigate their potential significance for social organization in nocturnal primates, we analyzed the spatial distribution of daily sleeping sites, their characteristics, their usage, and sleeping group compositions in the nocturnal Milne Edwards' sportive lemur during a 6‐month field study in the dry deciduous forest of northwestern Madagascar. Sexes did not differ…
Feeding Ecology of Sympatric Mouse Lemur Species in Northwestern Madagascar
Loud calling, spacing, and cohesiveness in a nocturnal primate, the Milne Edwards' sportive lemur ( Lepilemur edwardsi )
Dispersed pair‐living primates provide a unique model for illuminating the evolution of mechanisms regulating spacing and cohesiveness in permanently cohesive groups. We present for the first time data on the spatiotemporal distribution and loud‐calling behavior of the Milne Edwards' sportive lemur, known to forage solitarily during the night, but to form stable male‐female sleeping groups during the day. Data include radio‐tracking observations …
Social organization of the golden brown mouse lemur ( Microcebus ravelobensis )
Our study provides the first data on the social organization of the golden brown mouse lemur, a nocturnal primate discovered in northwestern Madagascar in 1994. The study was carried out in two 6‐month field periods during the dry season, covering time before and during the mating season. The spatial and temporal distributions of the sexes in the population were investigated by mark/recapture and radiotelemetry. Focal observations and the determi…
Infanticide by a Male Milne-Edwards' Sportive Lemur (Lepilemur edwardsi) in Ampijoroa, NW-Madagascar
Use of Vocal Fingerprinting for Specific Discrimination of Gray (Microcebus murinus) and Rufous Mouse Lemurs (Microcebus rufus)
Duetting—A mechanism to strengthen pair bonds in a dispersed pair‐living primate ( Lepilemur edwardsi )
Duetting is defined as an interactively organized pair display in which one pair partner coordinates its vocalizations in time with those of the other. It is widespread among tropical birds and cohesive pair‐living primates, in which it is suggested to strengthen pair bonds. We know very little about the presence and function of duetting in dispersed pair‐living mammals. We studied duetting behavior in a solitary foraging, but pair‐sleeping, prim…
Comparison of Reproductive Characteristics and Changes in Body Weight Between Captive Populations of Rufous and Gray Mouse Lemurs
Dynamics of Estrous Synchrony in Captive Gray Mouse Lemurs (Microcebus murinus)
Aspects of reproduction and behavioral and vocal development in Senegal Bushbabies(Galago senegalensis)
The role of acoustic signaling for spacing and group coordination in a nocturnal, pair‐living primate, the western woolly lemur ( Avahi occidentalis )
OBJECTIVES: How social groups govern their distribution in time and space is a central question in socioecology. The aim of this study is to explore the role of acoustic signaling for spacing and cohesiveness in a nocturnal, cohesive, pair-living strepsirrhine. MATERIAL AND METHODS: The study was conducted in northwestern Madagascar. Six pairs of Avahi occidentalis were radio-collared and home range usage, vocalizations and call-associated behavi…
Seasonal Effects on Sleeping Site Ecology in a Nocturnal Pair-Living Lemur (Avahi occidentalis)
OrangFacs: A Muscle-Based Facial Movement Coding System for Orangutans (Pongo spp.)
Seasonality in Reproduction of Lepilemur edwardsi
Das Experiment in den Sozialwissenschaften
Aus dem Inhalt: Kausalität / Naturwissenschaftliches und sozialwissenschaftliches Experiment / Kontrolltechniken / Versuchsanordnungen / "Typen" des Experiments / Experiment und Survey / Experiment und interkultureller Vergleich / Reaktive Effekte experimenteller Versuchsanordnungen
Experience‐dependent recapture rates and reproductive success in male grey mouse lemurs ( Microcebus murinus )
Male mating tactics can vary according to the potential for scramble or contest competition but also as a consequence of individual characteristics, such as body condition and previous experience. The influence of experience, i.e., residency, on male recapture rates and reproductive success was studied in a population of free‐living grey mouse lemurs. Long‐term capture data from 320 individuals revealed that both sexes had very low recapture prob…
Evaluation of aids prevention among homosexual and bisexual men in Switzerland
Reproduction, physical growth and behavioral development in slow loris (Nycticebus coucang, Lorisidae)
Screams in the Night: Pilot Study Reveals Moderate Evidence for Individual Differences in Lorisoid Vocalizations
Introduction to Diversity and Speciation in the Prosimii
Das Experiment in den Sozialwissenschaften
Aus dem Inhalt: Kausalität / Naturwissenschaftliches und sozialwissenschaftliches Experiment / Kontrolltechniken / Versuchsanordnungen / "Typen" des Experiments / Experiment und Survey / Experiment und interkultureller Vergleich / Reaktive Effekte experimenteller Versuchsanordnungen
Clean Chopin Texts
Reproduction, physical growth and behavioral development in slow loris (Nycticebus coucang, Lorisidae)
Aspects of reproduction and behavioral and vocal development in Senegal Bushbabies(Galago senegalensis)
Evaluation of aids prevention among homosexual and bisexual men in Switzerland
Phylogenetic relationships among the galaginae as indicated by erythrocytic allozymes
Sex‐specific usage patterns of sleeping sites in grey mouse lemurs (Microcebus murinus) in northwestern Madagascar
Sex-specific usage patterns of sleeping sites in grey mouse lemurs (Microcebus murinus) in northwestern Madagascar
Sleeping sites are a potentially important resource for grey mouse lemurs since they are confronted with high daily temperature fluctuations and a high predation pressure. In order to determine the existence and degree of resource competition, sleeping site characteristics, locations, and usage patterns as well as sleeping group compositions were investigated in a 3 month field study in a dry deciduous forest of northwestern Madagascar. The daily…
Infanticide by a Male Milne-Edwards' Sportive Lemur (Lepilemur edwardsi) in Ampijoroa, NW-Madagascar
Introduction to Diversity and Speciation in the Prosimii
Use of Vocal Fingerprinting for Specific Discrimination of Gray (Microcebus murinus) and Rufous Mouse Lemurs (Microcebus rufus)
Contest versus scramble competition for mates: The composition and spatial structure of a population of gray mouse lemurs (Microcebus murinus) in North-west Madagascar
Colony specificity in a social call of mouse lemurs ( Microcebus ssp .)
Nocturnal primate species are often difficult to discriminate by gross visual bodily characteristics. This is also true for the world’s smallest primate taxon, the Malagasy mouse lemurs. Recent findings imply that this taxon contains sibling species that can be diagnosed noninvasively by their species‐specific advertisement call. We used comparative bioacoustics in order to explore variation of this call type and to assess species status of three…
Female dominance in captive gray mouse lemurs ( Microcebus murinus )
Female dominance or female feeding priority seem to be characteristic for many lemur species, but are rare traits in other primates and mammals in general. The nocturnal lemur species, however, are underrepresented in the quantitative studies on social dominance. The aim of this study is to investigate the pattern of intersexual dominance relationships in the gray mouse lemur ( Microcebus murinus ), a species that is generally thought to possess …
Dynamics of Estrous Synchrony in Captive Gray Mouse Lemurs (Microcebus murinus)
Comparison of Reproductive Characteristics and Changes in Body Weight Between Captive Populations of Rufous and Gray Mouse Lemurs
Seasonal changes in general activity, body mass and reproduction of two small nocturnal primates: A comparison of the golden brown mouse lemur ( Microcebus ravelobensis ) in Northwestern Madagascar an…
Species‐specific usage of sleeping sites in two sympatric mouse lemur species ( Microcebus murinus and M. ravelobensis ) in northwestern Madagascar
We investigated the sleeping site ecology of two sympatric mouse lemur species ( Microcebus murinus and M. ravelobensis ) in northwestern Madagascar during the second half of the dry season with respect to the type, quality, and usage pattern of the sleeping sites, as well as to social sleeping habits and response to potential threats. The type and quality of the sleeping sites differed between the two species. M. murinus used protected wooden sh…
Pair‐specific usage of sleeping sites and their implications for social organization in a nocturnal Malagasy primate, the Milne Edwards' sportive lemur ( Lepilemur edwardsi )
Safe sleeping sites may be a limited resource crucial for survival. In order to investigate their potential significance for social organization in nocturnal primates, we analyzed the spatial distribution of daily sleeping sites, their characteristics, their usage, and sleeping group compositions in the nocturnal Milne Edwards' sportive lemur during a 6‐month field study in the dry deciduous forest of northwestern Madagascar. Sexes did not differ…
First experimental evidence for female mate choice in a nocturnal primate
Social organization of the golden brown mouse lemur ( Microcebus ravelobensis )
Our study provides the first data on the social organization of the golden brown mouse lemur, a nocturnal primate discovered in northwestern Madagascar in 1994. The study was carried out in two 6‐month field periods during the dry season, covering time before and during the mating season. The spatial and temporal distributions of the sexes in the population were investigated by mark/recapture and radiotelemetry. Focal observations and the determi…
Feeding Ecology of Sympatric Mouse Lemur Species in Northwestern Madagascar
Loud calling, spacing, and cohesiveness in a nocturnal primate, the Milne Edwards' sportive lemur ( Lepilemur edwardsi )
Dispersed pair‐living primates provide a unique model for illuminating the evolution of mechanisms regulating spacing and cohesiveness in permanently cohesive groups. We present for the first time data on the spatiotemporal distribution and loud‐calling behavior of the Milne Edwards' sportive lemur, known to forage solitarily during the night, but to form stable male‐female sleeping groups during the day. Data include radio‐tracking observations …
Primate Life Histories
First evidence for relocation of stationary food resources during foraging in a strepsirhine primate ( Microcebus murinus )
Field observations suggest that the diet of the Malagasy gray mouse lemur consists not only of non‐stationary animal prey (invertebrates or small vertebrates), but also of stationary food resources such as gum or homopteran larvae secretions (HLS). We studied the foraging behavior of five mouse lemurs radiotelemetrically, each during six consecutive nights in the dry season, to explore to which extent they use these food resources and whether the…
Biology (38 works) · Primate (36 works) · Primate Behavior and Ecology (35 works) · Zoology (31 works) · Animal Vocal Communication and Behavior (29 works) · Lemur (29 works) · Animal Behavior and Reproduction (27 works) · Ecology (26 works) · Animal ecology (16 works) · Ecology (16 works)