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354 results on '"Wronski, Torsten"'

8. Vocalisation in wild-living mountain gazelles (Gazella gazella): structure and context of acoustical signals.

Author

Arnon, Amir, Koyama, Nicola F., and Wronski, Torsten

Subjects
GAZELLES, COURTSHIP, SPECTROGRAMS, SIGNALS & signaling, SPECIES
Abstract

Describing vocalisations of species in the wild is an important step to understanding their function. A wild-living population of mountain gazelles (Gazella gazella) was monitored in Israel, using camera traps, thereby providing a first detailed description of the acoustic repertoire. We described six acoustical signals that were either reported by previous authors or that were hitherto not reported. Acoustic signals were categorised according to behavioural context as alarm calls, courtship calls or threat calls and — if possible — characterised by four acoustic variables, i.e., duration, maximum amplitude frequency, three power quartiles and fundamental frequency. Vocalisations were illustrated as spectrograms supplemented by full video sequences to show the acoustical signal in its environmental, social, and behavioural context. Given the rather inconspicuous character of many acoustic signals, we proposed further in-depth studies of vocalisation in mountain gazelles and other Antilopine species to unravel new insights into their behaviour and social organisation. [ABSTRACT FROM AUTHOR]

Published
2024
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24. Reproductive biology of Gazella arabica: Predictors of offspring weight and short- and long-term offspring survival.

Author

Martin, Ryan A, Riesch, Rüdiger, Plath, Martin, Hanoosh, Naif A Al, and Wronski, Torsten

Subjects
BIOLOGY, CYTOPLASMIC inheritance, BIRTH weight, REPRODUCTION, POSTNATAL care, SEXUAL selection
Abstract

Reproductive traits are central to organismal fitness, and so the factors influencing patterns of reproduction and offspring survival are at the heart of biology. Making use of breeding data collected over 16 years at the King Khalid Wildlife Research Centre in Saudi Arabia, we investigated the reproductive biology of Arabian gazelles Gazella arabica. Offspring survival was mainly a function of birth weight, with heavier offspring having higher survival rates than lighter offspring. However, while sons were heavier than daughters, daughters had higher survival rates. We could not find evidence that giving birth to sons negatively impacts offspring weight in the following year. We uncovered large narrow-sense heritability (h 2) in offspring weight at birth, while maternal effects (m 2) on birth weight were of lesser importance. However, maternal effects on offspring survival were strong until weaning age, while paternal effects dominated survival to sexual maturity and first reproduction. We propose that variation in maternal postnatal care might overshadow the effects of maternal inheritance of birth weights, while the overall strong heritability of weight at birth and the paternal effects on survival illustrates strong variance in sire fitness based on genetic quality, suggesting a role for sexual selection by female mate choice in wild populations. [ABSTRACT FROM AUTHOR]

Published
2023
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