V. Menges's research while affiliated with Leibniz Institute for Zoo and Wildlife Research and other places

Publications (18)

Article
Full-text available
A retractable larynx and adaptations of the vocal folds in the males of several polygynous ruminants serve for the production of rutting calls that acoustically announce larger than actual body size to both rival males and potential female mates. Here, such features of the vocal tract and of the sound source are documented in another species. We in...
Article
Full-text available
Satellite telemetry is an increasingly utilized technology in wildlife research, and current devices can track individual animal movements at unprecedented spatial and temporal resolutions. However, as we enter the golden age of satellite telemetry, we need an in-depth understanding of the main technological, species-specific and environmental fact...
Data
Description of data fields in S1 Data. (CSV)
Data
R-code for boosted beta regression (Fix acquisition rate). (R)
Data
Global dataset for boosted beta regressions. (CSV)
Data
Satellite telemetry articles published. (PDF)
Data
R-code for boosted beta regression (Overall fix success rate). (R)
Data
Covariate partial effects on the variability of the Overall fix success rate. (PDF)
Data
Distribution of response variables and covariates. (PDF)
Data
Covariate partial effects on the variability of the fix acquisition rate. (PDF)
Data
Standardized data collection questionnaire. (PDF)
Data
Unit purchase and operation costs. (PDF)
Article
Physiological stress markers may provide valuable insight for our understanding of costs of given life-history strategies or of wildlife health condition, most importantly in case of threatened species. In the last decade, there has been growing interest in the ecological relevance of cellular oxidative stress, which would provide complimentary inf...
Research
Full-text available
Abstract This research project started in 2012 and was based on Okambara Elephant Lodge, a game farm located 85 km south of Windhoek’s international airport, in the Khomas region of central Namibia. Okambara is game-fenced and comprises an area of 150 km2. This report covers the survey work conducted during the period of August–November 2014. The...
Research
Full-text available
Abstract This research project started in 2012 and was based on Okambara Elephant Lodge, a game farm located 85 km south of Windhoek’s international airport, in the Khomas region of central Namibia. Okambara is game-fenced and comprises an area of 150 km2. This report covers the survey work conducted during the period of August–November 2013. The...

Citations

... The expected relationship between phenotype and formants has been validated in many mammal species (Briefer and McElligott 2011;Garcia et al. 2016Garcia et al. , 2017Garcia and Ravignani 2020), although the strength of the relationship was variable, and in some cases acoustic communication was found to be honest but imprecise (Sanvito et al. 2007a). In contrast, excluding a few exceptions (McElligott et al. 2006;Frey et al. 2011Frey et al. , 2020, most demonstrations of the structural link between phenotype and vocal tracts have come from studies that applied radiography or other imaging methods to sedated or dead subjects (Plotsky et al. 2013;Garcia et al. 2017;Volodin et al. 2017). Although those studies have provided accurate measurements of the vocal tract parts, being performed on sedated or dead subjects, they have only provided a static snapshot of the tract that may not be highly representative of what happens in naturally vocalizing animals. ...
... A proportion of the deployed collars will not yield the expected amount of data due to collar malfunctions, or because the animal dies or disperses outside of the study area. Accounting for this in advance means researchers should increase the target sample size by a buffer of at least 20% [26]. Further, if age or sex-specific estimates are desired (or if differences among such classes would otherwise confound inference), the sample size needs to be increased even further because the actual animals captured will inevitably not align with needs as they are likely unevenly dispersed among demographic groups. ...