News

Parasites can significantly reduce the food intakeof their host animals. In a meta-analysis, IGB researchers have now quantified that parasitized animals consume on average a quarter less food than their non-infected conspecifics.

The IGB has commented on the draft National Biodiversity Strategy 2030 from a research perspective and is also making the analysis public here.

A team of behavioural ecologists from IGB and the Humboldt-Universität zu Berlin (HU Berlin) is investigating how animals hunt in groups. Animals in water hunt differently than animals on land, which is partly due to the different size ratio between predator and prey. One example is striped marlin, which belong to the billfish family. Motivation may play a greater role than dominance hierarchy during resource division, but the large fish get out-competed by sea lions when the two predators attack the same prey.

On 8 May 2023, around 2,000 juvenile fish will be stocked near Stützkow. The original plan was to release the fish in the autumn of 2022, but this was not possible due to the man-made environmental disaster on the river. Now, the partners involved are making a new attempt and sending a signal for better protection of our river habitats. 

Weirs and other transverse structures in rivers not only impede migratory fish on their way to spawning grounds, but even if they are able to pass, many of them die in the turbines of hydroelectric power plants. Traditional fish ladders are often not designed for sturgeon, and as a result on average only about 2 per cent of the sturgeon use them. A team of researchers from Germany and China has now presented a recommendation on how to facilitate effective passage and even promote sturgeon with bypass channels at dams that can serve as additional habitat.

Cyclists need light, bats need darkness - a new science-based approach can help.

How do animals and plants survive and thrive in cities? Urban ecology is a growing research field. To find orientation in the information jungle on urban ecology, a team led by IGB and Freie Universität Berlin (FU Berlin) has created a map of 62 important research hypotheses in urban ecology. Among them are the idea of the daring city dweller, life on credit or the biological monotony of cities. Research has yet to show how robust the hypotheses are and to which cities they apply. The overview provides an important basis for this endeavor. It is openly available in Wikidata.

An international team has set up a database with geo-referenced occurrence records of four groups of freshwater invertebrate taxa across Cuba. Detailed knowledge of the spatial distribution of freshwater species is an important basis for monitoring changes in aquatic ecosystems.