About the lab

We like fish and fishing and study both.

Featured projects (1)

Project
1) Development of reference states in relation to biodiversity for small gravel pits as basis for fisheries management, nature conservation and restoration 2) Implementation of good managerial practice in recreational fisheries management with focus on conservation and habitat management rather than fish stocking 3) Establishment of methodical guidelines for the improvement of ecosystem services in small gravel pits that can be implemented independently by local angling clubs 4) Protection and improvement of habitats in the littoral zone of gravel pits used for recreational fisheries 5) Preservation, protection and rehabilitation of the type-specific aquatic communities in small gravel pits 6) Demonstration of the economic value of investments into biodiversity and the resulting ecosystem services with a focus on the littoral zone in gravel pits 7) Public outreach and science communication about the ecosystem services and the biodiversity offered by gravel pit lakes 8) Establishment of an inter- and transdisciplinary research network among fish ecologists, fisheries ecologists, economists, biodiversity researchers and implementation partners to ensure the sustainability of this important research approach in fisheries sciences Acknowledgements and funding statement The Project is funded by the German Federal Ministry of Education and Research (BMBF) and the German Federal Ministry for the Environment, Nature Conservation, Building and Nuclear Safety (BMUB). The BMBF funded this project as Research for Sustainable Development (FONA); www.fona.de (grant number 01LC1320A).

Featured research (14)

Angeln in Mecklenburg-Vorpommern 01/2022, 18-19. The entire issue is freely available online: https://www.lav-mv.de/wp-content/uploads/2021/09/AiMV_2022_1.pdf
Schlaue Karpfen, die jeden Köder vorsichtig einsaugen und wieder ausspucken: Das beschreiben moderne Karpfenangler mit Unterwasserkameras und vor allem englischen Karpfencracks von ihrem Hochsitz auf ufernahen Weiden seit Jahren. Und es stimmt tatsächlich! Karpfen erinnern sich an Hakerfahrungen und meiden unsere Rigs. Das haben die Forscher Philipp Czapla, Magnus Lovén Wallerius und Robert Arlinghaus vom IGB Berlin herausgefunden.
The majority of choice sets in stated preference studies so far uses a text-based matrix format to present choice alternatives in columns and describing both the attributes and their levels with words and figures. Visualisations are meant to help respondents to understand better and evaluate the changes in the provision of the good in question. While they have been employed to provide additional information in the scenario descriptions, it is an open question of whether choice sets themselves should comprise or consist of visualisations. Only a few studies have investigated how visual choice sets affect choices, their validity, and subsequently, WTP estimates. Generally, it is known that people respond differently to visual and verbal information, and thus, the form of presentation may trigger different response patterns. In a study concerned with gravel pits in NRW, Germany, we compare visual versus text-based choice sets in a matrix format in otherwise identical surveys. Results show that marginal WTP estimates differ significantly for some, although the importance ranking of attributes results in the same order. Also, the median response time varies only in very few cases. However, results of an equality constrained latent class model are suggesting that respondents who faced the visual choice sets were less likely to not-attend some non-monetary while they were more likely to not-attend the cost attribute. The results overall suggest that the benefits of using visual choice sets are not are explicit, and if WTP estimates are a priority might be even disadvantageous. Further research using, for example, eye-tracking for comparisons between different choice task formats should be employed to gain additional insights.
• Humanity is facing a biodiversity crisis, with freshwater‐associated biodiversity in a particularly dire state. Novel ecosystems created through human use of mineral resources, such as gravel pit lakes, can provide substitute habitats for the conservation of freshwater and riparian biodiversity. Many of these artificial ecosystems are subject to a high intensity of recreational use, however, which may limit their biodiversity potential. • The species richness of several taxa (plants, amphibians, dragonflies, damselflies, waterfowl, and songbirds) was assessed and a range of taxonomic biodiversity metrics were compared between gravel pit lakes managed for recreational fisheries (n = 16) and unmanaged reference lakes (n = 10), controlling for non‐fishing‐related environmental variation. • The average species richness of all the taxa examined was similar among lakes in both lake types and no substantial differences in species composition were found when examining the pooled species inventory. Similarly, there were no differences between lake types in the presence of rare species and in the Simpson diversity index across all of the taxa assessed. • Variation in species richness among lakes was correlated with woody habitat, lake morphology (surface area and steepness), and land use, but was not correlated with the presence of recreational fisheries. Thus, non‐fishing‐related environmental variables had stronger effects on local species presence than recreational fisheries management or the presence of recreational anglers. • Collectively, no evidence was found that anglers and recreational fisheries management constrain the development of aquatic and riparian biodiversity in gravel pit lakes in the study region; however, the conservation of species diversity in gravel pit lakes could benefit from an increasing reliance on habitat enhancement activities.
Vorliegende Studie erfasst erstmalig sämtliche Standgewässer in Niedersachsen und zeigt, dass künstlich ge-schaffene kleine Baggerseen der dominierende Gewässertyp der Region sind. Zudem legt diese Studie verglei-chende Ergebnisse zur Biodiversität anglerisch bewirtschafteter und unbewirtschafteter Baggerseen vor. Ob-wohl die anglerisch bewirtschafteten Baggerseen intensiver freizeitlich genutzt wurden, fanden sich bei Pflanzen, Amphibien, Libellen und Vögeln keine Unterschiede in der Artvielfalt und in der Simpson-Diversi-tät. Signifikante Einflüsse der Angelfischerei waren lediglich in Bezug auf die Fischgemeinschaften nachweis-bar, die in bewirtschafteten Seen artenreicher als in unbewirtschafteten Vergleichsgewässern waren. Es wird geschlussfolgert, dass die anglerische Bewirtschaftung die gewässertypspezifische Fischartenvielfalt in Bagger-seen fördert und dass die Angelfischerei unter den spezifischen sozial-ökologischen Bedingungen Niedersach-sens keinen relevanten Einflussfaktor auf die sonstige Artenvielfalt darstellt. We mapped all lakes in Lower Saxony and show that gravel pit lakes are the dominant lake type in the study region. Furthermore, we compared gravel pit lakes managed and not managed by recreational fisheries in terms of biodiversity across a range of aquatic and riparian taxa. Although the angling lakes were used more intensively for recreation, no differences in species richness and the Simpson diversity index were detected for plants, amphibians, damsel-and dragonflies, and birds. The only relevant biodiversity effect detected in response to fisheries management related to fish communities, which were found to be more species-rich in ang-ler-managed lakes compared to unmanaged ones. We conclude that management by anglers promotes the water-type-specific fish species diversity in gravel pit lakes, and recreational angling is unlikely a relevant factor influencing the species richness under the social-ecological conditions of Lower Saxony.

Lab head

Robert Arlinghaus
Department
  • Department of Biology and Ecology of Fishes
About Robert Arlinghaus
  • I like fish, and I like fishing, and I like to study fish, fishers and fishing from both applied and basic perspectives.

Members (15)

Thilo Pagel
  • Leibniz-Institute of Freshwater Ecology and Inland Fisheries
Sophia Kochalski
  • Leibniz-Institute of Freshwater Ecology and Inland Fisheries
Félicie Dhellemmes
  • Leibniz-Institute of Freshwater Ecology and Inland Fisheries
Rob van Gemert
  • Swedish University of Agricultural Sciences
Elias Ehrlich
  • Leibniz-Institute of Freshwater Ecology and Inland Fisheries
Malwina Schafft
  • Leibniz-Institute of Freshwater Ecology and Inland Fisheries
Andrea Campos-Candela
  • University of Bergen
Sven Matern
  • Leibniz-Institute of Freshwater Ecology and Inland Fisheries
Marie Fujitani
Marie Fujitani
  • Not confirmed yet
Robert Hagemann
Robert Hagemann
  • Not confirmed yet

Alumni (4)

Daniel Hühn
  • Institute of Inland Fisheries Potsdam Sacrow
Thomas Klefoth
  • Angling Association of Lower Saxony (Anglerverband Niedersachsen e.V.)
Josep Alós
  • Spanish National Research Council
Christopher T Monk
  • Institute of Marine Research in Norway