Dröscher, Iris

[["dc.bibliographiccitation.artnumber","e22550"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","American Journal of Primatology"],["dc.bibliographiccitation.volume","79"],["dc.contributor.author","Ganzhorn, Joerg U."],["dc.contributor.author","Arrigo- Nelson, Summer J."],["dc.contributor.author","Carrai, Valentina"],["dc.contributor.author","Chalise, Mukesh K."],["dc.contributor.author","Donati, Giuseppe"],["dc.contributor.author","Droescher, Iris"],["dc.contributor.author","Eppley, Timothy M."],["dc.contributor.author","Irwin, Mitchell T."],["dc.contributor.author","Koch, Flávia"],["dc.contributor.author","Koenig, Andreas"],["dc.contributor.author","Foley, William J."],["dc.date.accessioned","2022-10-06T13:33:50Z"],["dc.date.available","2022-10-06T13:33:50Z"],["dc.date.issued","2016"],["dc.identifier.doi","10.1002/ajp.22550"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/115743"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-602"],["dc.relation.issn","0275-2565"],["dc.relation.orgunit","Deutsches Primatenzentrum"],["dc.title","The importance of protein in leaf selection of folivorous primates"],["dc.title.alternative","Primate Leaf Selection"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","842"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","American Journal of Primatology"],["dc.bibliographiccitation.lastpage","854"],["dc.bibliographiccitation.volume","76"],["dc.contributor.author","Dröscher, Iris"],["dc.contributor.author","Kappeler, Peter"],["dc.date.accessioned","2017-09-07T11:48:32Z"],["dc.date.available","2017-09-07T11:48:32Z"],["dc.date.issued","2014"],["dc.description.abstract","Group-living folivorous primates can experience competition for food, and feeding competition has also been documented for solitarily foraging gummivorous and omnivorous primates. However, little is known about the types and consequences of feeding competition in solitary folivorous foragers. We conducted this study in the spiny forest of Berenty Reserve, southern Madagascar, to characterize the competitive regime of the nocturnal solitarily foraging white-footed sportive lemur (Lepilemur leucopus), a species that lives in dispersed pairs. We analyzed 1,213 hr of behavioral observations recorded simultaneously for the male and female of each of seven social units and recorded seasonal changes in food availability over a complete annual cycle. Lepilemur leucopus exhibited low selectivity in its dietary choice and mainly included the most abundant plant species in its diet. Contrary to our predictions, we did not find evidence for increased rates of contest (i.e., displacement from food trees) or scramble competition (i.e., shared use of food patches) during the lean season, neither within nor between social units. Instead, conflict rates were low throughout the year, and, during these observations, any feeding stress may have been more related to food quality than quantity. The resource defense hypotheses may not explain pair-living in this species as there was no indication that males defend food resources for their female pair-partners. The observed lack of feeding competition may indicate that a cryptic anti-predator strategy is a better predictor of spatial avoidance of pair-partners than conflict over food. While anti-predator benefits of crypsis may explain, at least partly, female-female avoidance, studies on the relationship between territory size/quality and reproductive success are required to understand whether feeding competition reduces the potential for female association in L. leucopus. Am. J. Primatol. 76:842–854, 2014. © 2014 The Authors. American Journal of Primatology Published by Wiley Periodicals, Inc."],["dc.identifier.doi","10.1002/ajp.22272"],["dc.identifier.gro","3150845"],["dc.identifier.pmid","24677259"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7639"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.issn","0275-2565"],["dc.title","Competition for food in a solitarily foraging folivorous primate (Lepilemur leucopus)?"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2043"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Behavioral Ecology and Sociobiology"],["dc.bibliographiccitation.lastpage","2058"],["dc.bibliographiccitation.volume","68"],["dc.contributor.author","Dröscher, Iris"],["dc.contributor.author","Kappeler, Peter"],["dc.date.accessioned","2017-09-07T11:48:23Z"],["dc.date.available","2017-09-07T11:48:23Z"],["dc.date.issued","2014"],["dc.description.abstract","Latrine use (i.e., the repeated use of specific defecation/urination sites) has been described for several mammals, including carnivores, ungulates, and primates. However, the functional significance of latrine use in primates has not been studied systematically yet. We, therefore, followed 14 radio-collared individuals of the pair-living white-footed sportive lemur (Lepilemur leucopus) for 1097 hours of continuous focal observations to investigate latrine distribution, seasonality of latrine use, as well as age and sex of users to test various hypotheses related to possible functions of latrine use, including territory demarcation, resource defense, signaling of reproductive state, social bonding, and mate defense. All individuals of a social unit exhibited communal use of latrines located in the core area of their territory, supporting the social boding hypothesis. Latrine use seems to facilitate familiarity and social bonding within social units via olfactory communication in this primate that lives in family units but exhibits low levels of spatial cohesion and direct social interactions. In addition, frequency of latrine visitation was higher during nights of perceived intruder pressure, supporting the mate defense hypothesis. However, animals did not react to experimentally introduced feces from neighboring or strange social units, indicating that urine may be the more important component of latrines than feces in this arboreal species. Based on a survey of latrine use and function in other mammals, we conclude that latrines facilitate communication particularly in nocturnal species with limited habitat visibility and in species where individuals are not permanently cohesive because they constitute predictable areas for information exchange."],["dc.identifier.doi","10.1007/s00265-014-1810-z"],["dc.identifier.gro","3150792"],["dc.identifier.pmid","25395720"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/11307"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7583"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation.issn","0340-5443"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Maintenance of familiarity and social bonding via communal latrine use in a solitary primate (Lepilemur leucopus)"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1225"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","International Journal of Primatology"],["dc.bibliographiccitation.lastpage","1243"],["dc.bibliographiccitation.volume","34"],["dc.contributor.author","Dröscher, Iris"],["dc.contributor.author","Kappeler, Peter"],["dc.date.accessioned","2017-09-07T11:48:31Z"],["dc.date.available","2017-09-07T11:48:31Z"],["dc.date.issued","2013"],["dc.description.abstract","Whereas other species of sportive lemurs (genus Lepilemur) have been described as living in dispersed pairs, which are characterized by spatial overlap but a lack of affinity or affiliation between one adult male and female, existing reports on the social organization of the white-footed sportive lemur (Lepilemur leucopus) are conflicting, describing them as either living in dispersed one-male multifemale systems or pairs. We conducted this study in the spiny forest of Berenty Reserve, southern Madagascar, to clarify the social organization and to characterize the level of social complexity of this species. We combined 1530 h of radio-telemetry and behavioral observations over a period of 1 yr to describe the spatiotemporal stability, size, and interindividual overlap of individual home ranges as well as interindividual cohesiveness. Results revealed low intra- and high intersexual home range overlap. Although most of the social units identified consisted of dispersed pairs (N = 5), males were associated with two adult females in two cases. Furthermore, members of a social unit were never observed to groom each other or to share a daytime sleeping site, and Hutchinson’s and Doncaster’s dynamic interaction tests indicated active avoidance between pair partners. Low cohesiveness together with extremely low rates of social interactions therefore arguably places Lepilemur leucopus at the low end of primate social complexity."],["dc.identifier.doi","10.1007/s10764-013-9735-3"],["dc.identifier.gro","3150850"],["dc.identifier.pmid","24347750"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/10355"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7644"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation.issn","0164-0291"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Defining the Low End of Primate Social Complexity: The Social Organization of the Nocturnal White-Footed Sportive Lemur (Lepilemur leucopus)"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","197"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","American Journal of Physical Anthropology"],["dc.bibliographiccitation.lastpage","207"],["dc.bibliographiccitation.volume","160"],["dc.contributor.author","Dröscher, Iris"],["dc.contributor.author","Rothman, Jessica M."],["dc.contributor.author","Ganzhorn, Jörg U."],["dc.contributor.author","Kappeler, Peter"],["dc.date.accessioned","2017-09-07T11:48:24Z"],["dc.date.available","2017-09-07T11:48:24Z"],["dc.date.issued","2016"],["dc.description.abstract","ObjectivesSmall-bodied folivores are rare because processing leaves often requires extensive gut adaptations and lengthy retention times for fiber fermentation. However, the <1 kg nocturnal white-footed sportive lemurs (Lepilemur leucopus) persist on a leaf-based diet. We investigated how extrinsic (i.e., seasonality in temperature and food availability) and intrinsic factors (i.e., reproductive state) influence nutrient intake and explored how nutrient and energy needs are met in this species.Materials and MethodsWe conducted full night focal follows across all seasons and analyzed nutrients in all items eaten by adults of both sexes to investigate nutrient intake and nutritional priorities in L. leucopus. We estimated digestible protein content, as this is a biologically more meaningful measure than crude protein.ResultsProtein intake was constant across seasons, while non-protein energy and dry matter intake increased from the hot wet to the cold dry season. Males and females did not differ in their nutrient or apparent energy intake irrespective of female reproductive state.DiscussionWe conclude that these animals prioritize protein over non-protein energy intake as dietary protein is in limited supply, and that thermoregulation poses higher energetic costs than reproduction in this species. While protein intake did not differ across female reproductive states, the relative protein content of the diet was highest during the lactation period, indicating that the balance of non-protein to protein intake may be more important than absolute intake. Dry matter intake was high compared to other folivorous primates, indicating that L. leucopus follows an intake rather than an efficiency strategy to meet its energy requirements."],["dc.identifier.doi","10.1002/ajpa.22952"],["dc.identifier.gro","3150797"],["dc.identifier.pmid","26865348"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7589"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.issn","0002-9483"],["dc.title","Nutritional consequences of folivory in a small-bodied lemur (Lepilemur leucopus): Effects of season and reproduction on nutrient balancing"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]