Lighting requirements of nocturnal primates in captivity: A chronobiological approach
Abstract 10.1002/zoo.1430080209.abs From the results of chronobiological studies in 11 Aotus lemurinus (trivirgatus) griseimembra, 3 Galago garnettii, 5 Galago senegalensis, and 6 Microcebus murinus, inferences can be made on the most suitable lighting conditions for nocturnal primates kept in captivity. In each species studied light controls the daily periodic course of activity in a dual […]
Variation of the phase of the 24-h activity period in different large herbivore species under European and African conditions
The variation of daily rhythms were analysed in relation to environmental factors. Activity phases were determined for Przewalski horses (Equus ferus przewalskii), feral domestic horses (Equus caballus), and mouflon (Ovis orientalis musimon) in Europe under semi-natural conditions by storage telemetry (ETHOSYS 1 ) and compared to samples from plain zebra (Equus burchelli) and blesbok (Damaliscus […]
Whistle rates of wild bottlenose dolphins (Tursiops truncatus): Influences of group size and behavior
In large social groups acoustic communication signals are prone to signal masking by conspecific sounds. Bottlenose dolphins (Tursiops truncatus) use highly distinctive signature whistles that counter masking effects. However, they can be found in very large groups where masking by conspecific sounds may become unavoidable. In this study we used passive acoustic localization to investigate […]
Beyond masking: Endangered Stephen’s kangaroo rats respond to traffic noise with footdrumming
On-road vehicles have become a pervasive source of low frequency noise in both urban environments and natural protected areas. Because many species rely on low-frequency signals to communicate with conspecifics, they are likely to be especially vulnerable to signal masking and the concomitant biological effects associated with exposure to traffic noise. Here, we show that […]
Urban noise undermines female sexual preferences for low-frequency songs in domestic canaries
Increasing levels of anthropogenic noise represent a challenge for animals living in urban areas and birds, especially, may suffer from noisy conditions as they use singing to attract mates. Most anthropogenic noise is low in frequency and singing at high frequencies under noisy urban conditions may avoid masking and thus be a good strategy for […]