From 1550 onwards, a great interest in the natural world developed across Europe. This interest was not only stimulated by a growing knowledge of local flora and fauna, but also by the import of numerous exotic animal and plant species. Think, for instance, of researches and collectors like Gessner…

Promotor: C.J. ten Cate, Co-promotor: H.W. Slabbekoorn

How has early development in R. ocellatus been modified as a result of its parasitic embryonic lifestyle?

We developed the bitterling as a unique, well-studied model organism in the area of the evolutionary ecology of brood parasitism. The bitterling-mussel relationship, interspecific mussel host preference, and mussel gill structure are studied in detail, to help understand the developmental adaptation…

Developing a new way to measure marine biodiversity at high resolution, by listening to it.

Does Artifical Light at Night (ALAN) disrupt seasonal physiological and behavioral patterns in migrating freshwater fish?

Freshwater biodiversity has been threatened by eutrophication due to excessive nutrients in the environment. Releasing the freshwater species from such pressures requires efforts from industry and manufacturers to avoid emissions to vulnerable and high-risk regions.

Do natural soundscapes affect migratory decisions of fishes moving up and down rivers and is this process disturbed by vessel sounds?

How did learned natural historical inquiries into the underwater world develop in eighteenth-century Europe?

Do offshore windfarms affect the local biodiversity of the pelagic fish community and are fish deterred or attracted by sounds?

On the28th of September Didi van Trijp successfully defended a doctoral thesis and graduated.

PhD defence

Bird, butterfly, fish: when you look through a children’s book, you usually don’t think about the fact that humans divided these animals, depicted in bright colours, into categories. Yet, this division has been discussed for centuries. In her PhD dissertation, Didi van Trijp shows how natural scientists…

Anthropogenic noise has been shown to affect marine animals in various ways, this may have fitness consequences at individual and population level. This thesis aims to increase insight into the quantification of sound-induced behavioural responses that are relevant to fitness, and into factors that…

The NWO just announced the results of the Vrije Competitie proposals. Paul Smith, professor at the French department is, as a member of LUCAS, one of three scholars within the Faculty of Humanities at Leiden University who has been awarded this grant.

Researchers from Biomon have used DNA-techniques to find 40 different species of fish in the river Dommel. This technique is capable of detecting more species than conventional methods of measuring.

On the 1st of October a new project funded by the Joint Industry Programme (JIP) started at the IBL on the potentially negative effects of sound on fish. Behavioural biologist and bioacoustic specialist Dr. Hans Slabbekoorn leads the international research team.

In this thesis, two potential therapeutic targets for diabetic nephropathy were dentified and investigated. First, we show that glomerular clusterin is upregulated in diabetic nephropathy and demonstrated that recombinant clusterin protein can protect the podocytes against oxidative stress in vitro.…

China’s booming aquaculture industry is increasingly dependent on fishmeal made from wild-caught fish, a practice that depletes wild fish stocks. A new study conducted by institutions including Leiden University and Stanford offers a more sustainable path. The study appeared in the journal Science on…

Hydropower plants need not be disastrous for fishermen and nature. For that, we need to place new dams more strategically, but also modify or even remove some existing ones. Valerio Barbarossa and Rafael Schmitt showed that with a computer model of the Asian Mekong basin.

On 16 June, Leiden University opens the MIGRADROME: a unique, seven-metre-long artificial river. Researchers will use it to study how light and sound affect migratory fish. ‘We’re recreating a real river, but under fully controlled conditions.’

The habitats of freshwater fish species are threatened by global warming, mainly due to rising water temperatures. This is the conclusion of a study led by Radboud University, in collaboration with Utrecht University, PBL Netherlands Environmental Assessment Agency, Leiden University and others. The…

Physicists, including Dorothea Samtleben from Leiden University, are building a giant underwater telescope to unravel the origin of neutrinos and to solve the mystery surrounding dark matter. The first detector has now been installed. Once it is finished, the telescope will be three cubic kilometres…

The Elephant Marsh is one of the biggest wetlands in Malawi and many of the country’s inhabitants rely on it for their small-scale fishing catch. To make their small fisheries sustainable and future-proof, the government has to support the fishing community and not impose too many regulations. This…

Every Sunday you can help fish plastic and other floating garbage out of the Leiden canals. You can use your own canoe or loan one from Plastic Spotter and join the garbage-fishing fleet. Annetje Ottow, President of Leiden University, was one of the crew on Sunday 4 July.

Personality is genetic in zebrafish: risk-taking parents have risk-taking children. These are the findings of research by Christian Tudorache and his team published in BMC Neuroscience.

Mingo, a 91-year-old fish lover from Bari, takes us with him into the physical, symbolic and cultural space of the market.

The Dutch Research Council (NWO) awarded behavioural biologist Hans Slabbekoorn (Institute of Biology Leiden) a grant of 750,000 euros to study fish and sounds around wind farms in the North Sea.

Fishes rely heavily on sound to find their way during migration or dispersal. Many species are affected by noise pollution. Hans Slabbekoorn from the Institute of Biology Leiden received a HORIZON2020 grant of 500,000 euros to study the impact of sound conditions on movement decisions of fishes.

Last week, on 13 February 2019, the EU approved the ban on pulse trawling. This followed the vote for a ban by the European Parliament on 16 January 2018. Half of the 84 Dutch pulse trawling vessels must stop immediately; the other half will receive a transitional arrangement until July 2021. Outcomes…

With his photo of a fish trapped in a rubber glove, external PhD candidate Auke-Florian Hiemstra has made it to the shortlist for the People’s Choice Award in the prestigious Wildlife Photographer of the Year competition. The photo shows the impact of Covid litter on wildlife.

Venomous animals serve as models for a variety of mimicry types. Michael Richardson (IBL) and his international colleagues find that a group of fishes (called fangblennies) evolved venom after the origin of their venom-delivering fangs.

Promotor: Prof.dr. B. van de Water, Co-promotor: E.H.J. Danen

The work described in this dissertation contributes to a better mechanistic understanding of nanoparticles in vivo. To achieve that goal, we used the zebrafish as a highly predictive pre-screening model of nanoparticles.

Cultural anthropologist Annet Pauwelussen has been invited by the University of Washington to participate in an expert meeting on 'Global Measures of the Contribution of Small-Scale Fisheries to Sustainable Development'. 29 - 30 May 2018, Seattle.

Promotores: Prof.dr. G.A. Persoon & Prof. dr. H.H. de Iongh

The first of April was the official start of Phase II of the collaborative “PCAD4Cod”-project on the effect of sound on fish populations. Hans Slabbekoorn, associate professor at the IBL, is the principal investigator and collaborates with three PhD-students, Dr. Erwin Winter, (Wageningen Marine Research),…

This PhD subproject concentrates on 16th-century ichthyology and takes Gessner’s Historia piscium (1558) (further HP) as its point of departure and focus.

A seven-metre glass tunnel, filled with running water, and equipped with speakers and cameras. An artificial river for investigating what light and sound pollution do to migrating fish.

Promotor: Carel J. ten Cate, Co-Promotor: Hans W. Slabbekoorn

Ichthyoarchaeological and biomolecular research to assess the trophic ecology of the Rhine-Meuse delta in the Holocene

In my research, I focus on cooperation, social dilemmas, tacit coordination, uncertainty, sanctions and trust.

Management of Impacts on Biodiversity: What are the effects of light pollution from cities and bridges and noise pollution from passing vessels and nearby road traffic on migratory fish passage and spawning in rivers?

We have facilities for various research animals, all of which naturally comply with legal requirements. We take great care of the animals, and our enclosures are designed to meet the specific needs of the different species.

We aim to conduct as few animal experiments as possible. We are continually exploring methods to Replace, Reduce, and Refine animal experiments, commonly referred to as the three Rs. Additionally, we assess each study to ensure the implementation of the 3Rs has been maximised. The Animal Welfare Body…

The effects of anthropogenic noise on interactions between predators and their prey are still little understood.