Amphibious communication with sound in hippos, Hippopotamus amphibius

Article Abstract:

The study reported that hippos make sounds both in air and underwater, and with their heads in an amphibious position, are able to transmit sounds to both media simultaneously. Hippos in the amphibious position respond to playback of underwater hippo screams that are inaudible in air, and also to natural underwater calls, suggesting that they can hear in air and water simultaneously.

United States, Behavior, Hippopotamus, Hippopotamuses

---

Interspecific responses to distress calls in bats (Chiroptera: Vespertilionidae): a function for convergence in call design?

Article Abstract:

The response derived from the playback experiments consisting of experimental distress that call sequences from each species and control sequences of random noise is presented. The response was measured by simultaneously recording ultrasound during playbacks and counting the echolocation pulses above a predetermined threshold that was then identified to species.

Distress signals

---

Detection and discrimination of natural calls in masking noise by birds: estimating the active space of a signal

Article Abstract:

The ability of birds to detect and discriminate natural vocal signals in the presence of masking noise using operant conditioning is tested. A simple model for estimating likely detection and discrimination distances for the signals tested is provided.

Similar abstracts:

• Abstracts: Effects of population density on horn development in bighorn rams. Harvesting bighorn ewes: consequences for population size and trophy ram production
• Abstracts: Demographic Processes Underlying Population Growth and Decline in Salamandra salamandra. Effects on habitat disturbance on stream salamanders: implcations for buffer zones and watershed management
• Abstracts: The physical basis of how prion conformations determine strain phenotypes. Global landscape of protein complexes in the yeast Saccharomyces cerevisiae
• Abstracts: Patenting the obvious?. Homeland science chief wants quick fixes. US army attacked over published patent for 'bioweapons grenade'
• Abstracts: Ionospheric signatures of pulsed reconnection at the Earth's magnetopause. In situ detection of collisionless reconnection in the Earth's magnetotail

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.