Nutrient inputs into freshwater aquaculture systems

An interactive visualisation of the shares of water and feed to the total nutrient input into (closed) freshwater aquaculture systems.

Background

Water

The underlying tap water dataset consists of 89 water analysis reports from local authorities and water utilities in the corresponding municipalities, covering 23 countries all over Europe. Tap water originates either from groundwater or surface water and thus resembles both water sources.
The rainwater dataset consists of 18 rainwater analyses collected from literature.

Feed

The feed dataset consists of 66 observations collected in form of feed manufacturer datasheets, and 16 data records from literature studies in which commercial feeds were used. Another 8 records were collected from the literature and 3 own feed analyses were added.
Different nutrient retention levels were also considered based on literature studies.

Element	n	Retention (%)
N	85	45-55%
P	79	70-80%
K	13	45-55%
Ca	16	45-55%
Mg	14	80-90%
S	12	80-90%
Fe	12	70-80%
Cu	12	55-65%
Zn	12	60-70%

The feeds all match the requirements of Common carp ( Cyprinus carpio ), Pikeperch ( Sander lucioperca ), Nile tilapia ( Oreochromis niloticus ), African catfish ( Clarias gariepinus ), and Rainbow trout ( Oncorhynchus mykiss ). The mentioned species were chosen due to their cumulated share of approximately 23% of world freshwater fish production (The State of World Fisheries and Aquaculture 2022).

Further information

This app is supplementary material of the publication: Tellbüscher, A.A., Gebauer, R., Mráz, J., 2025: Nutrients revisited: Review and meta-data analysis of nutrient inputs into freshwater aquaculture systems. Aquaculture 595, Part 2, 741633. https://doi.org/10.1016/j.aquaculture.2024.741633

The data used for this app is publicly available on Zenodo: https://zenodo.org/doi/10.5281/zenodo.10855065

written by: Anıl Axel Tellbüscher , University of South Bohemia, Czech Republic