news reports - Insect vibrations tell of good times and bad...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Insect vibrations tell of good times and bad 3,200 species in treehopper family and 200,000 other species communicate by making surface vibrations, scientifically called substrate vibration. Thornbugs send signals into stems of trees by shaking their bodies. The communications that thornbugs and other insects send via substrate vibrations are inaudible to human ears without the assistance of technology. To listen in, researchers record the vibrations and play the recordings back though a loudspeaker. insects use substrate vibrations for many of the same reasons other animals, including humans, use vocal chords—to get each others' attention, find mates, and share the address for a bite to eat. Insects are able to pick up and respond to the vibrations made by individuals of their own species, telling the signals apart by the pitch or the rhythm of the timing. Dung Beetles Navigate by the moon, Study says The African dung beetle Scarabaeus zambesianus orients itself by the polarized light pattern cast by the moon to make a straight, nighttime escape with its morsel. Once the beetles are a safe distance from the pile, they burrow into the ground and feast on their nugget for days. The burrows also serve as a pathway for air and moisture to get into the ground, giving dung beetles a critical role in the savanna ecosystem. At sunset, the beetle is able to orientate itself using the polarization pattern formed around the setting sun, but when the sun is 18 degrees beyond the horizon, known as astronomical twilight, the pattern is lost. To determine if this continued ability to forage after astronomical twilight is a result of the polarization of moonlight or of the moon itself, the researchers
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

news reports - Insect vibrations tell of good times and bad...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online