Works by Ortmann, Sylvia

Results: 49

Sodium Retention in Large Herbivores: Physiological Insights and Zoogeochemical Consequences.

Published in:

Journal of Experimental Zoology: Part A Ecological & Integrative Physiology, 2025, v. 343, n. 6, p. 664, doi. 10.1002/jez.2924

By:

Abraham, Andrew J.;
Duvall, Ethan S.;
Doughty, Christopher E.;
Riond, Barbara;
Ortmann, Sylvia;
Terranova, Melissa;
le Roux, Elizabeth;
Clauss, Marcus

Publication type:

Article

Evidence for a male‐biased sex ratio in the offspring of a large herbivore: The role of environmental conditions in the sex ratio variation.

Published in:

Ecology & Evolution (20457758), 2022, v. 12, n. 5, p. 1, doi. 10.1002/ece3.8938

By:

Hagen, Robert;
Ortmann, Sylvia;
Elliger, Andreas;
Arnold, Janosch

Publication type:

Article

Seed traits matter—Endozoochoric dispersal through a pervasive mobile linker.

Published in:

Ecology & Evolution (20457758), 2021, v. 11, n. 24, p. 18477, doi. 10.1002/ece3.8440

By:

Stiegler, Jonas;
Kiemel, Katrin;
Eccard, Jana;
Fischer, Christina;
Hering, Robert;
Ortmann, Sylvia;
Strigl, Lea;
Tiedemann, Ralph;
Ullmann, Wiebke;
Blaum, Niels

Publication type:

Article

Individual dietary specialization in a generalist predator: A stable isotope analysis of urban and rural red foxes.

Published in:

Ecology & Evolution (20457758), 2020, v. 10, n. 16, p. 8855, doi. 10.1002/ece3.6584

By:

Scholz, Carolin;
Firozpoor, Jasmin;
Kramer-Schadt, Stephanie;
Gras, Pierre;
Schulze, Christoph;
Kimmig, Sophia E.;
Voigt, Christian C.;
Ortmann, Sylvia

Publication type:

Article

Reconstruction of evolutionary changes in fat and toxin consumption reveals associations with gene losses in mammals: A case study for the lipase inhibitor PNLIPRP1 and the xenobiotic receptor NR1I3.

Published in:

Journal of Evolutionary Biology, 2022, v. 35, n. 2, p. 225, doi. 10.1111/jeb.13970

By:

Wagner, Franziska;
Ruf, Irina;
Lehmann, Thomas;
Hofmann, Rebecca;
Ortmann, Sylvia;
Schiffmann, Christian;
Hiller, Michael;
Stefen, Clara;
Stuckas, Heiko

Publication type:

Article

Spatiotemporal interactions of a novel mesocarnivore community in an urban environment before and during SARS‐CoV‐2 lockdown.

Published in:

Journal of Animal Ecology, 2022, v. 91, n. 2, p. 367, doi. 10.1111/1365-2656.13635

By:

Louvrier, Julie L. P.;
Planillo, Aimara;
Stillfried, Milena;
Hagen, Robert;
Börner, Konstantin;
Kimmig, Sophia;
Ortmann, Sylvia;
Schumann, Anke;
Brandt, Miriam;
Kramer‐Schadt, Stephanie

Publication type:

Article

The Influence of Seasonal Frugivory on Nutrient and Energy Intake in Wild Western Gorillas.

Published in:

PLoS ONE, 2015, v. 10, n. 7, p. 1, doi. 10.1371/journal.pone.0129254

By:

Masi, Shelly;
Mundry, Roger;
Ortmann, Sylvia;
Cipolletta, Chloé;
Boitani, Luigi;
Robbins, Martha M.

Publication type:

Article

Risk perception by endangered European bison Bison bonasus is context (condition) dependent.

Published in:

Landscape Ecology, 2015, v. 30, n. 10, p. 2079, doi. 10.1007/s10980-015-0232-2

By:

Hayward, Matt;
Ortmann, Sylvia;
Kowalczyk, Rafał

Publication type:

Article

Comparative digesta retention patterns in ratites.

Published in:

Auk: Ornithological Advances, 2015, v. 132, n. 1, p. 119, doi. 10.1642/AUK-14-144.1

By:

Frei, Samuel;
Ortmann, Sylvia;
Reutlinger, Christoph;
Kreuzer, Michael;
Hatt, Jean-Michel;
Clauss, Marcus

Publication type:

Article

Salivary cues: simulated roe deer browsing induces systemic changes in phytohormones and defence chemistry in wild-grown maple and beech saplings.

Published in:

Functional Ecology, 2017, v. 31, n. 2, p. 340, doi. 10.1111/1365-2435.12717

By:

Ohse, Bettina;
Hammerbacher, Almuth;
Seele, Carolin;
Meldau, Stefan;
Reichelt, Michael;
Ortmann, Sylvia;
Wirth, Christian;
Koricheva, Julia

Publication type:

Article

Personality drives activity and space use in a mammalian herbivore.

Published in:

Movement Ecology, 2022, v. 10, n. 1, p. 1, doi. 10.1186/s40462-022-00333-6

By:

Stiegler, Jonas;
Lins, Alisa;
Dammhahn, Melanie;
Kramer-Schadt, Stephanie;
Ortmann, Sylvia;
Blaum, Niels

Publication type:

Article

Self-Selected Macronutrient Diet Affects Energy and Glucose Metabolism in Brown Fat-Ablated Mice.

Published in:

Obesity (19307381), 2003, v. 11, n. 12, p. 1536, doi. 10.1038/oby.2003.205

By:

Ortmann, Sylvia;
Prinzler, Julia;
Klaus, Susanne

Publication type:

Article

Extrahepatic biliary tract pathologies in mammalian species of zoo animals and wildlife: a review.

Published in:

Journal of Basic & Applied Zoology, 2020, v. 81, n. 1, p. 1, doi. 10.1186/s41936-020-00162-2

By:

Schiffmann, Christian;
Unterhitzenberger, Gabriele;
Ortmann, Sylvia

Publication type:

Article

Advanced roe deer (Capreolus capreolus) parturition date in response to climate change.

Published in:

Ecosphere, 2021, v. 12, n. 11, p. 1, doi. 10.1002/ecs2.3819

By:

Hagen, Robert;
Ortmann, Sylvia;
Elliger, Andreas;
Arnold, Janosch

Publication type:

Article

Wild inside: Urban wild boar select natural, not anthropogenic food resources.

Published in:

PLoS ONE, 2017, v. 12, n. 4, p. 1, doi. 10.1371/journal.pone.0175127

By:

Stillfried, Milena;
Gras, Pierre;
Busch, Matthias;
Börner, Konstantin;
Kramer-Schadt, Stephanie;
Ortmann, Sylvia

Publication type:

Article

Digestive physiology of captive capybara (Hydrochoerus hydrochaeris).

Published in:

Zoo Biology, 2019, v. 38, n. 2, p. 167, doi. 10.1002/zoo.21472

By:

Kiani, Ali;
Clauss, Marcus;
Ortmann, Sylvia;
Vendl, Catharina;
Congdon, Elizabeth R.;
Herrera, Emilio A.;
Kreuzer, Michael;
Schwarm, Angela

Publication type:

Article

Digestive physiology of the plains viscacha ( Lagostomus maximus): A large herbivorous hystricomorph rodent.

Published in:

Zoo Biology, 2015, v. 34, n. 4, p. 345, doi. 10.1002/zoo.21216

By:

Hagen, Katharina B.;
Besselmann, Dorothea;
Cyrus-Eulenberger, Ulrike;
Vendl, Catharina;
Ortmann, Sylvia;
Zingg, Robert;
Kienzle, Ellen;
Kreuzer, Michael;
Hatt, Jean-Michel;
Clauss, Marcus

Publication type:

Article

Nutrition of captive lowland anoa ( Bubalus depressicornis): a study on ingesta passage, intake, digestibility, and a diet survey.

Published in:

Zoo Biology, 2005, v. 24, n. 2, p. 125, doi. 10.1002/zoo.20036

By:

Flores-Miyamoto, Kaori;
Clauss, Marcus;
Ortmann, Sylvia;
Sainsbury, Anthony W.

Publication type:

Article

Elevated activity in adult mountain gorillas is related to consumption of bamboo shoots.

Published in:

Journal of Mammalogy, 2016, v. 97, n. 6, p. 1663, doi. 10.1093/jmammal/gyw132

By:

GRUETER, CYRIL C.;
ROBBINS, MARTHA M.;
ABAVANDIMWE, DIDIER;
ORTMANN, SYLVIA;
MUDAKIKWA, ANTOINE;
NDAGIJIMANA, FELIX;
VECELLIO, VERONICA;
STOINSKI, TARA S.

Publication type:

Article

Transfer of total phenols from a grapeseed-supplemented diet to dairy sheep and goat milk, and effects on performance and milk quality.

Published in:

Journal of Animal Science, 2019, v. 97, n. 4, p. 1840, doi. 10.1093/jas/skz046

By:

Leparmarai, Paul Taipa;
Sinz, Susanne;
Kunz, Carmen;
Liesegang, Annette;
Ortmann, Sylvia;
Kreuzer, Michael;
Marquardt, Svenja

Publication type:

Article

A pilot investigation on the effect of induced saliva flow on digestive parameters in sheep, and a comparison with cattle.

Published in:

Journal of Animal Physiology & Animal Nutrition, 2023, v. 107, n. 5, p. 1176, doi. 10.1111/jpn.13815

By:

Zhang, Xiaoyu;
Li, Yang;
Terranova, Melissa;
Ortmann, Sylvia;
Kehraus, Saskia;
Gerspach, Christian;
Kreuzer, Michael;
Clauss, Marcus;
Hummel, Jürgen

Publication type:

Article

Effect of induced saliva flow on fluid retention time, ruminal microbial yield and methane emission in cattle.

Published in:

Journal of Animal Physiology & Animal Nutrition, 2023, v. 107, n. 3, p. 769, doi. 10.1111/jpn.13773

By:

Zhang, Xiaoyu;
Li, Yang;
Terranova, Melissa;
Ortmann, Sylvia;
Kehraus, Saskia;
Gerspach, Christian;
Kreuzer, Michael;
Hummel, Jürgen;
Clauss, Marcus

Publication type:

Article

Individual differences in digesta retention and their relation to chewing in cattle—A pilot investigation.

Published in:

Journal of Animal Physiology & Animal Nutrition, 2023, v. 107, n. 2, p. 394, doi. 10.1111/jpn.13733

By:

Zhang, Xiaoyu;
Li, Yang;
Terranova, Melissa;
Ortmann, Sylvia;
Kreuzer, Michael;
Hummel, Jürgen;
Clauss, Marcus

Publication type:

Article

No size‐dependent net particle retention in the hindgut of horses.

Published in:

Journal of Animal Physiology & Animal Nutrition, 2022, v. 106, n. 6, p. 1356, doi. 10.1111/jpn.13757

By:

Schwarm, Angela;
Clauss, Marcus;
Ortmann, Sylvia;
Jensen, Rasmus B.

Publication type:

Article

The effect of fructose supplementation on feed intake, nutrient digestibility and digesta retention time in Reeves's muntjac (Muntiacus reevesi).

Published in:

Journal of Animal Physiology & Animal Nutrition, 2019, v. 103, n. 6, p. 1684, doi. 10.1111/jpn.13188

By:

Przybyło, Marcin;
Clauss, Marcus;
Ortmann, Sylvia;
Kowalski, Zygmunt M.;
Górka, Paweł

Publication type:

Article

Behavioural Responses of European Roe Deer to Temporal Variation in Predation Risk.

Published in:

Ethology, 2013, v. 119, n. 3, p. 233, doi. 10.1111/eth.12057

By:

Sönnichsen, Leif;
Bokje, Matthijs;
Marchal, Jessica;
Hofer, Heribert;
Jędrzejewska, Bogumiła;
Kramer‐Schadt, Stephanie;
Ortmann, Sylvia;
Janik, V.

Publication type:

Article

Methane emission, digestive characteristics and faecal archaeol in heifers fed diets based on silage from brown midrib maize as compared to conventional maize.

Published in:

Archives of Animal Nutrition, 2015, v. 69, n. 3, p. 159, doi. 10.1080/1745039X.2015.1043211

By:

Schwarm, Angela;
Schweigel-Röntgen, Monika;
Kreuzer, Michael;
Ortmann, Sylvia;
Gill, Fiona;
Kuhla, Björn;
Meyer, Ulrich;
Lohölter, Malte;
Derno, Michael

Publication type:

Article

Importance of subterranean fungi in the diet of bonobos in Kokolopori.

Published in:

American Journal of Primatology, 2021, v. 83, n. 9, p. 1, doi. 10.1002/ajp.23308

By:

Lucchesi, Stefano;
Cheng, Leveda;
Wessling, Erin G.;
Kambale, Bienfait;
Lokasola, Albert L.;
Ortmann, Sylvia;
Surbeck, Martin

Publication type:

Article

Western chimpanzees (Pan troglodytes verus) access a nutritionally balanced, high energy, and abundant food, baobab (Adansonia digitata) fruit, with extractive foraging and reingestion.

Published in:

American Journal of Primatology, 2021, v. 83, n. 9, p. 1, doi. 10.1002/ajp.23307

By:

Lindshield, Stacy;
Rothman, Jessica M.;
Ortmann, Sylvia;
Pruetz, Jill D.

Publication type:

Article

Social and ecological correlates of space use patterns in Bwindi mountain gorillas.

Published in:

American Journal of Primatology, 2018, v. 80, n. 4, p. 1, doi. 10.1002/ajp.22754

By:

Seiler, Nicole;
Boesch, Christophe;
Stephens, Colleen;
Ortmann, Sylvia;
Mundry, Roger;
Robbins, Martha M.

Publication type:

Article

The Novel Antiobesic HMR1426 Reduces Food Intake without Affecting Energy Expenditure in Rats<sup>**</sup>.

Published in:

Obesity (19307381), 2004, v. 12, n. 8, p. 1290, doi. 10.1038/oby.2004.163

By:

Ortmann, Sylvia;
Kampe, Juliane;
Gossel, Matthias;
Bickel, Martin;
Geisen, Karl;
Jähne, Gerhard;
Lang, Hans Jochen;
Klaus, Susanne

Publication type:

Article

Digesta retention patterns of solute and different-sized particles in camelids compared with ruminants and other foregut fermenters.

Published in:

Journal of Comparative Physiology B: Biochemical, Systemic & Environmental Physiology, 2015, v. 185, n. 5, p. 559, doi. 10.1007/s00360-015-0904-x

By:

Dittmann, Marie;
Runge, Ullrich;
Ortmann, Sylvia;
Lang, Richard;
Moser, Dario;
Galeffi, Cordula;
Schwarm, Angela;
Kreuzer, Michael;
Clauss, Marcus

Publication type:

Article

Efficiency of facultative frugivory in the nectar-feeding bat Glossophaga commissarisi: the quality of fruits as an alternative food source.

Published in:

Journal of Comparative Physiology B: Biochemical, Systemic & Environmental Physiology, 2008, v. 178, n. 8, p. 985, doi. 10.1007/s00360-008-0287-3

By:

Kelm, Detlev;
Schaer, Juliane;
Ortmann, Sylvia;
Wibbelt, Gudrun;
Speakman, John;
Voigt, Christian

Publication type:

Article

Food preferences of wild mountain gorillas.

Published in:

American Journal of Primatology, 2008, v. 70, n. 10, p. 927, doi. 10.1002/ajp.20584

By:

Ganas, Jessica;
Ortmann, Sylvia;
Robbins, Martha M.

Publication type:

Article

Do cities represent sources, sinks or isolated islands for urban wild boar population structure?

Published in:

Journal of Applied Ecology, 2017, v. 54, n. 1, p. 272, doi. 10.1111/1365-2664.12756

By:

Stillfried, Milena;
Fickel, Jörns;
Börner, Konstantin;
Wittstatt, Ulrich;
Heddergott, Mike;
Ortmann, Sylvia;
Kramer‐Schadt, Stephanie;
Frantz, Alain C.;
Frair, Jacqueline

Publication type:

Article

No evidence for a 'warning effect' of blue light in roe deer.

Published in:

Wildlife Biology, 2017, p. -1, doi. 10.2981/wlb.00331

By:

Brieger, Falko;
Kämmerle, Jim-Lino;
Martschuk, Nadja;
Ortmann, Sylvia;
Hagen, Robert

Publication type:

Article

Identification of energy consumption and nutritional stress by isotopic and elemental analysis of urine in bonobos ( Pan paniscus).

Published in:

Rapid Communications in Mass Spectrometry: RCM, 2012, v. 26, n. 1, p. 69, doi. 10.1002/rcm.5312

By:

Deschner, Tobias;
Fuller, Benjamin T.;
Oelze, Vicky M.;
Boesch, Christophe;
Hublin, Jean-Jacques;
Mundry, Roger;
Richards, Michael P.;
Ortmann, Sylvia;
Hohmann, Gottfried

Publication type:

Article

The relationship of food intake and ingesta passage predicts feeding ecology in two different megaherbivore groups.

Published in:

Oikos, 2007, v. 116, n. 2, p. 209, doi. 10.1111/j.0030-1299.2007.15461.x

By:

Clauss, Marcus;
Jürgen Streich, W.;
Schwarm, Angela;
Ortmann, Sylvia;
Hummel, Jürgen

Publication type:

Article

Food choices of the mountain gorilla in Bwindi Impenetrable National Park, Uganda: the influence of nutrients, phenolics and availability.

Published in:

Journal of Tropical Ecology, 2009, v. 25, n. 2, p. 123, doi. 10.1017/S0266467408005701

By:

Ganas, Jessica;
Ortmann, Sylvia;
Robbins, Martha M.

Publication type:

Article

Dietary variability of western gorillas (Gorilla gorilla gorilla).

Published in:

PLoS ONE, 2022, v. 17, n. 8, p. 1, doi. 10.1371/journal.pone.0271576

By:

Robbins, Martha M.;
Ortmann, Sylvia;
Seiler, Nicole

Publication type:

Article

Going to extremes for sodium acquisition: use of community land and high‐altitude areas by mountain gorillas Gorilla beringei in Rwanda.

Published in:

Biotropica, 2018, v. 50, n. 5, p. 826, doi. 10.1111/btp.12598

By:

Grueter, Cyril C.;
Wright, Edward;
Abavandimwe, Didier;
Ortmann, Sylvia;
Mudakikwa, Antoine;
Musana, Abel;
Uwingeli, Propser;
Ndagijimana, Felix;
Vecellio, Veronica;
Stoinski, Tara S.;
Robbins, Martha M.

Publication type:

Article

Causes, mechanisms, and consequences of contest competition among female mountain gorillas in Rwanda.

Published in:

Behavioral Ecology, 2016, v. 27, n. 3, p. 766, doi. 10.1093/beheco/arv212

By:

Grueter, Cyril C.;
Robbins, Andrew M.;
Abavandimwe, Didier;
Vecellio, Veronica;
Ndagijimana, Felix;
Ortmann, Sylvia;
Stoinski, Tara S.;
Robbins, Martha M.

Publication type:

Article

Variability in Population Density Is Paralleled by Large Differences in Foraging Efficiency in Chimpanzees ( Pan troglodytes).

Published in:

International Journal of Primatology, 2015, v. 36, n. 6, p. 1101, doi. 10.1007/s10764-015-9880-y

By:

Potts, Kevin;
Baken, Erica;
Ortmann, Sylvia;
Watts, David;
Wrangham, Richard

Publication type:

Article

Daily Energy Balance and Protein Gain Among Pan troglodytes verus in the Taï National Park, Côte d’Ivoire.

Published in:

International Journal of Primatology, 2009, v. 30, n. 3, p. 481, doi. 10.1007/s10764-009-9354-1

By:

N'guessan, Antoine;
Ortmann, Sylvia;
Boesch, Christophe

Publication type:

Article

Retention of solutes and particles in the gastrointestinal tract of a grazing cervid: Père David's deer (Elaphurus davidianus).

Published in:

European Journal of Wildlife Research, 2019, v. 65, n. 3, p. N.PAG, doi. 10.1007/s10344-019-1288-0

By:

Derix, Jill;
Ortmann, Sylvia;
Wiegmann, Lisa;
Lawrenz, Arne;
Janssens, Geert Paul Jules;
Clauss, Marcus

Publication type:

Article

Do roe deer react to wildlife warning reflectors? A test combining a controlled experiment with field observations.

Published in:

European Journal of Wildlife Research, 2017, v. 63, n. 5, p. 1, doi. 10.1007/s10344-017-1130-5

By:

Brieger, Falko;
Hagen, Robert;
Kröschel, Max;
Hartig, Florian;
Petersen, Imke;
Ortmann, Sylvia;
Suchant, Rudi

Publication type:

Article

Digesta retention time in roe deer Capreolus capreolus, as measured with cerium-, lanthanum- and chromium-mordanted fibre.

Published in:

European Journal of Wildlife Research, 2011, v. 57, n. 3, p. 437, doi. 10.1007/s10344-010-0450-5

By:

Schwarm, Angela;
Albrecht, Sylvia;
Ortmann, Sylvia;
Wolf, Christian;
Clauss, Marcus

Publication type:

Article

Fluid and particle passage in three duiker species.

Published in:

European Journal of Wildlife Research, 2011, v. 57, n. 1, p. 143, doi. 10.1007/s10344-010-0407-8

By:

Clauss, Marcus;
Lunt, Nicola;
Ortmann, Sylvia;
Plowman, Amy;
Codron, Daryl;
Hummel, Jürgen

Publication type:

Article

Function, size and form of the gastrointestinal tract of the collared Pecari tajacu (Linnaeus 1758) and white-lipped peccary Tayassu pecari (Link 1795).

Published in:

European Journal of Wildlife Research, 2010, v. 56, n. 4, p. 569, doi. 10.1007/s10344-009-0348-2

By:

Schwarm, Angela;
Ortmann, Sylvia;
Rietschel, Wolfram;
Kühne, Ragnar;
Wibbelt, Gudrun;
Clauss, Marcus

Publication type:

Article