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Book ; Online: Biodiversität, Angeln und Gesellschaft

Arlinghaus, Robert / Klefoth, Thomas / Matern, Sven / Radinger, Johannes / Nikolaus, Robert / Meyerhoff, Jürgen / Schafft, Malwina / Cyrus, Eva-Maria / Emmrich, Matthias / Hering, Daniel / Wolter, Christian

wissensbasierte Empfehlungen für ein nachhaltiges Fischereimanagement an Baggerseen

(Berichte des IGB ; Heft 32)

2023

Institution	Leibniz-Institut für Gewässerökologie und Binnenfischerei
Author's details	Robert Arlinghaus, Thomas Klefoth, Sven Matern, Johannes Radinger, Robert Nikolaus, Jürgen Meyerhoff, Malwina Schafft, Eva-Maria Cyrus, Matthias Emmrich, Daniel Hering & Christian Wolter ; unter Mitarbeit von: Hans-Hermann Arzbach, Rachel Fricke, Leander Höhne, Andreas Maday, Alessandro Manfrin, Charlotte Robichon, Ashley Trudeau, Ole Theis, Sebastian Theis & Nicola Wegener ; IGB - Leibniz-Institut für Gewässerökologie und Binnenfischerei
Series title	Berichte des IGB ; Heft 32
Collection
Subject code	630 ; 333.7
Language	German
Size	1 Online-Ressource (477 Seiten), Illustrationen, Diagramme, Karten
Publisher	Leibniz-Institut für Gewässerökologie und Binnenfischerei (IGB)
Publishing place	Berlin
Publishing country	Germany
Document type	Book ; Online
Note	Dieses Dokument ist lizenziert unter einer Creative Commons Namensnennung 4.0 International Lizenz (CC BY): www.creativecommons.org/licenses/by/4.0/ Von dieser Lizenz ausgenommen sind übernommene Abbildungen bereits publizierter Quellen der Autor:innen ; BAGGERSEE war ein Gemeinschaftsprojekt des Leibniz-Instituts für Gewässerökologie und Binnenfischerei (IGB), des Anglerverbands Niedersachsen e. V. (AVN) und der Technischen Universität Berlin (TU), in Kooperation mit der Hochschule Bremen. Das Forschungs- und Umsetzungsprojekt wurde gefördert im Rahmen der gemeinsamen Förderinitiative "Forschung zur Umsetzung der Nationalen Biodiversitätsstrategie" durch das Bundesministerium für Bildung und Forschung (BMBF) sowie das Bundesamt für Naturschutz (BfN) mit Mitteln des Bundesministeriums für Umwelt, Naturschutz, nukleare Sicherheit und Verbraucherschutz (BMUV). Koordinator war Prof. Dr. Robert Arlinghaus vom IGB und der Humboldt-Universität zu Berlin (HU) (Förderkennzeichen BAGGERSEE 01LC1320A, 01LC1320B und 3514685C20). Projektlaufzeit: 01.06.2016 bis 31.12.2022 ; Open Access
HBZ-ID	HT030051873
DOI	10.4126/FRL01-006452830
Database	Repository for Life Sciences

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Article: Effect of recreational‐fisheries management on fish biodiversity in gravel pit lakes, with contrasts to unmanaged lakes

Matern, Sven / Klefoth, Thomas / Nikolaus, Robert / Arlinghaus, Robert

Journal of fish biology, 94(6):865-881

2019

Abstract: Gravel pit lakes are novel ecosystems that can be colonized by fish through natural or anthropogenic pathways. In central Europe, many of them are managed by recreational anglers and thus experience regular fish stocking. However, also unmanaged gravel ... ...

Institution	Leibniz-Institut für Gewässerökologie und Binnenfischerei
Abstract	Gravel pit lakes are novel ecosystems that can be colonized by fish through natural or anthropogenic pathways. In central Europe, many of them are managed by recreational anglers and thus experience regular fish stocking. However, also unmanaged gravel pits may be affected by stocking, either through illegal fish introductions or, occasionally, by immigration from connected water bodies. We sampled 23 small (< 20 ha) gravel pit lakes (16 managed and 7 unmanaged) in north‐western Germany using littoral electrofishing and multimesh gillnets. Our objective was to compare the fish biodiversity in gravel pit lakes in the presence or absence of recreational fisheries. Given the size of the sampled lakes, we expected species poor communities and elevated fish diversity in the managed systems due to regular stocking of game fish species. Our study lakes were primarily mesotrophic and did not differ in key abiotic and biotic environmental characteristics. Lakes of both management types hosted similar fish abundances and biomasses, but were substantially different in terms of fish community structure and species richness. Fish were present in all lakes, with a minimum of three species. Higher α‐diversity and lower β‐diversity was discovered in managed gravel pit lakes compared to unmanaged lakes. Consequently, recreational‐fisheries management fostered homogenization of fish communities, by stocking a similar set of fish species desired by anglers such as piscivorous fish and large bodied cyprinids. However, unmanaged gravel pit lakes were also affected by human‐mediated colonization, presumably by illegal fish releases. Hardly any non‐native species were detected, suggesting that recreational‐fisheries management did not foster the spread of exotic species in our study region.
Keywords	community composition ; conservation ; novel ecosystems ; non-native species ; stocking ; recreational fishing
Language	English
Document type	Article
Database	Repository for Life Sciences

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Article: Opinion: Governing the recreational dimension of global fisheries

Arlinghaus, Robert / Fenichel, Eli / Carpenter, Stephen / Alós, Josep / Klefoth, Thomas / Jensen, Olaf / Wilberg, Michael

Proceedings of the National Academy of Sciences of the United States of America, 116(12):5209-13

2019

Institution	Leibniz-Institut für Gewässerökologie und Binnenfischerei
Language	English
Document type	Article
Database	Repository for Life Sciences

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Article ; Online: Do anglers and managers think similarly about stocking, habitat management and harvest regulations? Implications for the management of community-governed recreational fisheries

Klefoth, Thomas / Wegener, Nicola / Meyerhoff, Jürgen / Arlinghaus, Robert

Fisheries Research. 2023 Apr., v. 260 p.106589-

2023

Abstract: Perceptions about suitable fisheries management directions can differ between anglers and fisheries managers. Opposing beliefs, attitudes and norms about how to manage a local fishery can in turn create conflict. Within a system of community-held local ... ...

Abstract	Perceptions about suitable fisheries management directions can differ between anglers and fisheries managers. Opposing beliefs, attitudes and norms about how to manage a local fishery can in turn create conflict. Within a system of community-held local fishing rights, typical for central Europe, the interaction of anglers and local-level fisheries managers is particularly strong and direct because the managers are typically elected members of the local angling communities that are organized in clubs. In this role local fisheries managers are responsible for decisions about management measures, such as stocking or harvest regulations. Our objectives were to assess the perceived objectives, beliefs and attitudes towards a range of management-relevant issues, while contrasting anglers and elected fisheries managers in the context of German fishing clubs. Based on three large mail surveys conducted between 2010 and 2018 and including a total of 3112 anglers and 314 elected fisheries managers from the Federal State of Lower Saxony (north-western Germany) we found that anglers and fisheries managers both supported conservation objectives and held strong pro-stocking beliefs, which was particularly pronounced among anglers. Both groups significantly differed in their pro-ecological beliefs and the perceived functionality of habitat management and harvest regulations relative to fish stocking. Fisheries managers considered habitat enhancement and harvest regulations to deliver greater benefits than stocking compared to anglers. Both groups also differed in their behavioural intention to alter stocking practices, particularly with respect to the stocking of large and adult fish, which was desired by anglers, but on average rejected by fisheries managers in favour of the release of smaller fish. Our work shows that even within the traditional practice of fish stocking, anglers and fisheries managers differ in their perceptions. Engaging in decisions that deviate from the perception of anglers is prone to create conflicts. Harmonization of perspectives maybe possible through joint experiments in fisheries management at the club level, aiming to collectively learn about successes and risks of traditional and novel management approaches.
Keywords	adults ; fish ; fisheries ; habitat conservation ; habitats ; research ; Central European region ; Germany ; fish stocking ; habitat improvement ; harvest regulations ; conflict
Language	English
Dates of publication	2023-04
Publishing place	Elsevier B.V.
Document type	Article ; Online
ZDB-ID	406532-3
ISSN	0165-7836
ISSN	0165-7836
DOI	10.1016/j.fishres.2022.106589
Database	NAL-Catalogue (AGRICOLA)

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Book ; Online ; Thesis: Drivers of angler satisfaction and behaviour: the relevance of social-ecological contexts and angler specialization

Birdsong, Max [Verfasser] / Arlinghaus, Robert [Gutachter] / Burns, Robert [Gutachter] / Klefoth, Thomas [Gutachter]

2023

Author's details	Max Birdsong ; Gutachter: Robert Arlinghaus, Robert Burns, Thomas Klefoth
Keywords	Landwirtschaft, Veterinärmedizin ; Agriculture, Veterinary Science
Subject code	sg630
Language	English
Publisher	Humboldt-Universität zu Berlin
Publishing place	Berlin
Document type	Book ; Online ; Thesis
Database	Digital theses on the web

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Article: Influence of protected riparian areas on habitat structure and biodiversity in and at small lakes managed by recreational fisheries

Nikolaus, Robert / Matern, Sven / Schafft, Malwina / Maday, Andreas / Wolter, Christian / Klefoth, Thomas / Arlinghaus, Robert

Fisheries research. 2022 Aug. 22,

2022

Abstract: Protected areas are a common management tool to conserve habitats and species by controlling access and disturbances by humans. Whenever protected areas result in restricting access to riparian zones in lakes, they may have positive effects on habitats ... ...

Abstract	Protected areas are a common management tool to conserve habitats and species by controlling access and disturbances by humans. Whenever protected areas result in restricting access to riparian zones in lakes, they may have positive effects on habitats and taxa beyond fish by lowering influences of trampling or boating on plants, by reducing the degree of human-induced disturbances to sensitive taxa such as birds, and by reducing fishing effort. However, especially in small freshwater systems knowledge about the functioning of protected areas that cover only parts of the lake shorelines is limited. We studied small gravel pit lakes in Germany where recreational fishing clubs have voluntarily assigned no-access riparian protected areas on parts of the lake shorelines and examined outcomes for habitat quality, plants, fish and bird populations. A total of 15 lakes were sampled, and we assessed habitat structure and abundance of plants, and fish within and outside protected areas and bird abundance at the lake scale, relying on standardized sampling methods. After controlling for confounding environmental factors related to lake morphology, age, nutrients, and land use, we detected positive contributions of small-scale riparian protected areas on habitat structure, riparian vegetation, local fish abundance and abundance of sensitive songbirds at the lake-scale, but we found no effects on aquatic vegetation and on disturbance-sensitive waterfowl species. Scale-restricted riparian protected areas voluntarily assigned by recreational fishing clubs can have positive outcomes for habitat quality and biodiversity, particularly by reducing trampling and access to anglers and other recreationists. Moreover, through provision of key habitat for young fish, small-scale riparian protected areas can also benefit fish abundance and in turn recreational fisheries.
Keywords	aquatic plants ; biodiversity ; fish ; freshwater ; gravel pits ; habitats ; lakes ; land use ; research ; riparian vegetation ; waterfowl ; Germany
Language	English
Dates of publication	2022-0822
Publishing place	Elsevier B.V.
Document type	Article
Note	Pre-press version
ZDB-ID	406532-3
ISSN	0165-7836
ISSN	0165-7836
DOI	10.1016/j.fishres.2022.106476
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Fish community composition in small lakes: The impact of lake genesis and fisheries management

Matern, Sven / Klefoth, Thomas / Wolter, Christian / Hussner, Andreas / Simon, Janek / Arlinghaus, Robert

Freshwater Biology. 2022 Dec., v. 67, no. 12 p.2130-2147

2022

Abstract: Gravel pit lakes are common across Europe. These novel ecosystems serve as model systems to study human‐induced and natural colonisation of isolated lakes by fish. Fisheries‐management activities can quickly spread species over large distances, possibly ... ...

Abstract	Gravel pit lakes are common across Europe. These novel ecosystems serve as model systems to study human‐induced and natural colonisation of isolated lakes by fish. Fisheries‐management activities can quickly spread species over large distances, possibly homogenising fish communities across ecosystems, while fostering local fish diversity. Our objective was to evaluate the effects of lake genesis (gravel pit lakes < 100 years old vs. natural lakes of glacial genesis ~10,000 years old) and fisheries management (fish stocking activities present vs. absent) on the fish community in small lakes, while controlling for key environmental variables known to affect lake fish communities. We sampled fish communities by electrofishing and multimesh gillnetting in 47 isolated lakes managed for fisheries, and 19 unmanaged and isolated lakes of both natural and artificial origin in northern Germany. Unmanaged lakes were used as reference to assess fisheries‐management impacts in small natural and artificial lakes. We caught 178,506 fish from 30 species and found that the accumulation of native lake fish species in lakes was associated with fisheries management, which increased local species richness (α‐diversity) and number of predatory species, and reduced among‐lake variation in fish community composition (β‐diversity; i.e., homogenisation). The homogenisation‐effect associated with fisheries happened with introduced native fish species, whereas non‐native species were rarely detected. In unmanaged gravel pit lakes, the littoral fish community composition was substantially different to the communities present in both types of managed lakes and unmanaged natural lakes. Therefore, the relatively young unmanaged gravel pit lakes revealed evidence of ongoing, stochastic colonisation processes that resulted in comparatively species‐poor fish communities. We concluded that fisheries management by anglers speeds up the colonisation of gravel pit lakes with native fish species in the study area. For planning initial fish introductions in newly created gravel pit lakes, it is recommended that fish communities from ecologically similar natural lakes within the same geographical region are used as references to maintain the biotic integrity of newly created fish communities.
Keywords	community structure ; fish ; fish communities ; fisheries management ; gravel pits ; homogenization ; indigenous species ; introduced species ; lakes ; limnology ; littoral zone ; species richness ; Germany
Language	English
Dates of publication	2022-12
Size	p. 2130-2147.
Publishing place	John Wiley & Sons, Ltd
Document type	Article ; Online
Note	JOURNAL ARTICLE
ZDB-ID	121180-8
ISSN	0046-5070
ISSN	0046-5070
DOI	10.1111/fwb.14001
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Ecosystem-based management outperforms species-focused stocking for enhancing fish populations.

Radinger, Johannes / Matern, Sven / Klefoth, Thomas / Wolter, Christian / Feldhege, Fritz / Monk, Christopher T / Arlinghaus, Robert

Science (New York, N.Y.)

2023 Volume 379, Issue 6635, Page(s) 946–951

Abstract: Ecosystem-based management is costly. Therefore, without rigorously showing that it can outperform traditional species-focused alternatives, its broad-scale adoption in conservation is unlikely. We present a large-scale replicated and controlled set of ... ...

Abstract	Ecosystem-based management is costly. Therefore, without rigorously showing that it can outperform traditional species-focused alternatives, its broad-scale adoption in conservation is unlikely. We present a large-scale replicated and controlled set of whole-lake experiments in fish conservation (20 lakes monitored over 6 years with more than 150,000 fish sampled) to examine the outcomes of ecosystem-based habitat enhancement (coarse woody habitat addition and shallow littoral zone creation) versus a widespread, species-focused alternative that has long dominated fisheries management practice (i.e., fish stocking). Adding coarse woody habitats alone did not, on average, enhance fish abundance, but creating shallow water habitat consistently did, especially for juvenile fish. Species-focused fish stocking completely failed. We provide strong evidence questioning the performance of species-focused conservation actions in aquatic ecosystems and instead recommend ecosystem-based management of key habitats.
MeSH term(s)	Animals ; Ecosystem ; Fisheries ; Fishes ; Lakes ; Wood ; Conservation of Natural Resources
Language	English
Publishing date	2023-03-02
Publishing country	United States
Document type	Journal Article
ZDB-ID	128410-1
ISSN	1095-9203 ; 0036-8075
ISSN (online)	1095-9203
ISSN	0036-8075
DOI	10.1126/science.adf0895
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Article: Status of aquatic and riparian biodiversity in artificial lake ecosystems with and without management for recreational fisheries: Implications for conservation

Nikolaus, Robert / Schafft, Malwina / Maday, Andreas / Klefoth, Thomas / Wolter, Christian / Arlinghaus, Robert

Aquatic conservation. 2021 Jan., v. 31, no. 1

2021

Abstract: 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 ... ...

Abstract	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.
Keywords	Zygoptera ; environmental factors ; freshwater ; gravel pits ; habitats ; humans ; inventories ; lakes ; land use ; rare species ; species richness ; surface area ; waterfowl
Language	English
Dates of publication	2021-01
Size	p. 153-172.
Publishing place	John Wiley & Sons, Ltd
Document type	Article
Note	NAL-AP-2-clean ; JOURNAL ARTICLE
ZDB-ID	1146285-1
ISSN	1052-7613
ISSN	1052-7613
DOI	10.1002/aqc.3481
Database	NAL-Catalogue (AGRICOLA)

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Article: The value artificial lake ecosystems provide to recreational anglers: Implications for management of biodiversity and outdoor recreation

Meyerhoff, Jürgen / Arlinghaus, Robert / Klefoth, Thomas

Journal of environmental management. 2019 Dec. 15, v. 252

2019

Abstract: Small lakes largely outnumber large lakes among the world's lentic ecosystems. Despite being common landscape elements, however, little is known about the value small lakes provide to recreationists. This paper presents results of an economic valuation ... ...

Abstract	Small lakes largely outnumber large lakes among the world's lentic ecosystems. Despite being common landscape elements, however, little is known about the value small lakes provide to recreationists. This paper presents results of an economic valuation study concerned with small gravel pits in Lower Saxony, Germany. Gravel pits are artificially created lake ecosystems that, particularly in Europe, are regularly used and managed by privately organized recreational anglers in an angling club context. A stated choice experiment provided insights into anglers' preferences for the abundance of target fish species, biodiversity of taxa other than fishes in the lakes as well as in the lake surroundings, and about the use of gravel pits by other recreationists for walking, swimming or boating. Latent class analysis identified five segments that varied in preferences. For the majority of anglers, the value of angling at gravel pit lakes was improved by an increase in the abundance of predatory fishes. Additionally, the presence of aquatic and terrestrial endangered species at the lakes increased the value of the ecosystems as perceived by the majority of anglers. By contrast, the presence of other recreational uses reduced the value of angling, with swimming being considered the most disturbing, while the degree of shoreline development had the least impact on the recorded choices. The results suggest that managing the gravel pit lakes for high biodiversity and the presence of desired game fish species maximizes the value for anglers. However, also two smaller segments with anglers revealing lexicographic preferences were identified. These anglers expressed either strong preferences against swimming in the lakes or strongly preferred the opportunity to use boats. Lake management may address the preference heterogeneity and the aversion against other recreational uses, such as swimming, by spatial zoning.
Keywords	biodiversity ; boating ; boats ; economic valuation ; endangered species ; fishermen ; game fish ; gravel pits ; lakes ; landscapes ; lentic systems ; predatory fish ; shorelines ; sport fishing ; swimming ; walking ; water management ; zoning ; Germany
Language	English
Dates of publication	2019-1215
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	184882-3
ISSN	1095-8630 ; 0301-4797
ISSN (online)	1095-8630
ISSN	0301-4797
DOI	10.1016/j.jenvman.2019.109580
Database	NAL-Catalogue (AGRICOLA)

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