How do fishes perceive their environment?

ScienceDaily | 5/3/2017 | Staff
Frost123 (Posted by) Level 3
Click For Photo: https://images.sciencedaily.com/2017/05/170503092920_1_540x360.jpg

The ide (Leuciscus idus) is a fish that inhabits the lower stretches of slow-flowing rivers. Like most fishes, it can perceive the current using its lateral line. The mechanoreceptors of this organ are distributed over the surface of the entire body, which is why the organ provides a three-dimensional image of the hydrodynamic conditions. Fishes can thus also find their way around themselves in the dark and identify prey, conspecifics, or predators. The recently retired zoologist Prof. Horst Bleckmann from the University of Bonn has spent many years researching the sensitive organ and has used it as inspiration for technical flow sensors in order to, for instance, identify leakages in water pipes.

The scientists Dr. Hendrik Herzog from the Institute of Zoology and Dr. Alexander Ziegler from the Institute of Evolutionary Biology and Ecology at the University of Bonn have now entered a new dimension of research into the lateral line in fish: they created the first realistic, three-dimensional computer model of the lateral line system, which they used to calculate the precise flow conditions of the surrounding water. "We concentrated on the head of the ide, because the lateral line of the fish has a particularly complex form there," reports Dr. Herzog.

Organ - Types - Sensors - Bumps - Surface

This organ has two different types of sensors. Some protrude like small bumps from the surface of the fish's skin and the water flows directly over them. Others sit in canals that are submerged into the cranial bone and are connected to the water via small pores. "If prey, such as a freshwater shrimp, is close by, the local water current and pressure conditions change," explains Dr. Ziegler. The fish registers this with its many sensors. "However, until now, the actual function of such different types of current measurement had not been clarified conclusively."

Both researchers received active support from...
(Excerpt) Read more at: ScienceDaily
Wake Up To Breaking News!
Drove my Ford to the fjord, but the fjord was dry. . .
Sign In or Register to comment.

Welcome to Long Room!

Where The World Finds Its News!