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Water and fish

At SLU, you will find expertise in aquaculture, in the ecology of the aquatic fauna and flora, as well as in fish and water management. The state of the aquatic ecosystems is followed. SLU also investigates how resource use, e.g. fishing, affects the ecosystems. Aquaculture comprises cultivation of all living animals and plants in water, mainly in sea cages or in basins. In Sweden, fish, crayfish and shells are the most commonly grown organisms.

Fish are cultivated for different purposes; either for consuming or for planting out in fishing waters. Some areas of research are suitable fish strains for cultivation and the composition of fish fodder. Environmental and hygiene aspects of water and the role of water in agricultural land and in forests are other research fields.

The chemical and biological quality of water is regularly monitored in many lakes in Sweden. SLU's Environmental Monitoring and Assessment programme Lakes and watercourses helps to provide an overall picture of water status and chemical-physical impact lakes and watercourses. The programme Coastal and sea areas gathers SLU's expertise on marine environments and their assessment.

There are 18 pages tagged with Water and fish:

Hang your hat on fish welfare!

All fish kept by humans must be stunned before slaughter. However, how to do this in an ethically defensible manner is unclear. The lack of knowledge when it comes to stunning methods for fish is

Who asks the farmed fish?

Today, more than half of the fish we eat globally are raised in fish farms and the proportion originating from farming continue to increase. Unfortunately, there are some problems associated with

Helcom klimatrapport

Warmer water and less ice, but also fewer seals and more perch. These are some of the climate effects that we may see more of in the future. About a hundred researchers have contributed to a summary

Genetic mapping of Arctic charr – an important step for Swedish aquaculture

The Swedish breeding program for Arctic charr has been run successfully for almost forty years. Historically, breeding has been based on classic selection methods where breeding fish are selected

Feed ingredients for farmed fish – an opportunity for Sweden

Fish can be farmed with low environmental impact and without antibiotics. What is lacking is domestic feed ingredients for fish feed that do not compete with our own food, and that suits the fish.

Scientists crack the genetic code of the largest European freshwater fish, wels catfish

SLU scientists together with Estonian and Czech researchers assembled and annotated the genome of Europe's largest freshwater fish, the wels catfish. By unravelling the genetic code of catfish,

Insects as feed for trout

A problem with fish farming is that commercial fish feed contains fishmeal and fish oil. These raw materials are expensive and not very sustainable, because the already high demand for fish risks

Fish welfare at risk due to poor routines

Maintaining good animal welfare for fish is a major challenge within aquaculture. One threat against fish welfare is poorly adapted routines that increase the risk of causing unnecessary and

Old data series provide new answers about brown water

Many scientists have tried to find out why the water in lakes and streams is becoming browner. At Lund University, limnologist and newly appointed professor Emma Kritzberg found interesting clues in

Cod flounder

The demersal fish community in the Baltic Sea has gone through substantial change in its structure during the past 40 years. The decrease of large predatory cod may be an important driver behind the

reed feed

Reed is now turned into animal feed with an extra environmental benefit – reed harvest can also reduce eutrophication in our waters, according to researchers at SLU. Several measures, as for example

Redlist 2020

The marine environment is subjected to fast and substantial changes. In total 470 species found in the Swedish marine environment are listed in the 2020 version of the red-list from the SLU Swedish