What’s that, you say? Has Soundbites returned? Indeed it has! After a long hiatus for the summer, Soundbites is returning this term to provide you with all the latest and greatest bioacoustics news, bite-sized!
Phantom road experiment reveals noise degrades habitat: man do I like this experiment. As all of the ORCAA students could tell you, sometimes it’s hard to differentiate the effects of noise from general habitat degradation. These researchers set up a “phantom road” made of speakers and found evidence of avoidance and decreased body condition in birds.
Gorillas change vocalizations based on audience effects, not environmental factors: I don’t get to write about gorilla vocalizations very often! These researchers wanted to test the acoustic adaptation hypothesis to see if both mountain and lowland gorillas changed their vocalizations to maximize transmission in their cluttered (physically and acoustically) environment. Instead, the gorillas changed their vocalization based on social cues, like nearest neighbors and visual separation.
Traffic noise impacts zebra finch embryos and nestlings: the authors set out to distinguish the impacts of noise from other habitat variables by using captive zebra finches. High-noise groups had higher embryo mortality and slower nestling growth, and noise also was found to possibly exacerbate stressed animals further and contribute to reduced parental care.
Fun link of the week: acoustic scientists recently shattered the world record for longest echo. In Scotland, there are long tunnels that used to be used for oil storage. A gun shot echoed for a ridiculous 112 seconds!