Winter secrets: This is how fish survive in ice -cold Lake Constance!

Winter secrets: This is how fish survive in ice -cold Lake Constance!

Bregenz, Österreich - in Lake Constance there is currently a lot of fish - and at very short notice. At the mouth of the Bilgeri-Bächles in Bregenz, there are numerous fish that are prepared for the winter months. Fischer Markus Holzer reports that they are primarily swimming in the port to protect themselves from the cold temperatures. In the cooler autumn months, the fish put their metabolism back to a minimum, which makes it without drive and energy, because with the falling temperature it also reduces its food requirement. In this phase, the fish are particularly susceptible to their natural predators, such as goose readers and cormorants, who do not keep hibernation and are hunting as soon as they notice the swarms. However, the calm of the fish can bring them to life because they have to fear that they have to use their energy reserve quickly while hiding in the port. According to Holzer, the most common species that gather there are protection there, as well as "https://vorarlberg.orf/stories/3285637/" orf Vorarlberg reports.

But how do fish get over the icy winter conditions? A report by the Leibniz Institute for Water Ecology and Inland Fishing explains that most fish live in around four degrees cold water, while the surfaces can be covered with ice in extreme cold conditions. This water also remains relatively warm under the ice cream ceiling - which ensures the survival of the fish, as they can breathe through their gills without having to dive to the surface. While some types of fish, such as carp and trout, are also active in winter, others drive their metabolism back and rest more. Surprisingly, however, there are species that only really get going at cooler temperatures. In the meantime, alternating warm animals such as amphibians remain in a kind of rigid, while shells and other animals in the water reason also slow down their metabolism. On the basis of these adaptation strategies, the underwater dwellers show how they can defy the cold months, while the surface world often appears silent, as it is described in a detailed described in a post by scinexx

These fascinating survival mechanisms show how diverse and adaptable life in Lake Constance is, especially in the cold season, where, despite freezing temperatures, there is a pulsating life under water.