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All Outputs (66)

Contrasting responses to riverine barrier modification and fish pass provision in two anadromous non-salmonid species during their spawning migrations (2025)
Journal Article
Yeldham, M., Britton, J. R., Crundwell, C., Davies, P., Dodd, J., Grzesiok, C., Nunn, A., Velterop, R., & Bolland, J. (2025). Contrasting responses to riverine barrier modification and fish pass provision in two anadromous non-salmonid species during their spawning migrations. The journal of applied ecology, https://doi.org/10.1111/1365-2664.70093

Anthropogenic in-river structures represent barriers to migrating fishes. Fish pass designs usually focus on passing anadromous salmonids, and fish pass studies usually focus on site-scale metrics, failing to consider the wider effects. Weir passage... Read More about Contrasting responses to riverine barrier modification and fish pass provision in two anadromous non-salmonid species during their spawning migrations.

The Seaward Migration of European Eel at a Continental Scale: A Europe-Wide Biotelemetry Meta-Analysis (2025)
Journal Article
Verhelst, P., Righton, D., Aarestrup, K., Almeida, P. R., Bašić, T., Bolland, J. D., Carter, L., Coeck, J., Costa, J. L., Dainys, J., Davidsen, J. G., Domingos, I., Dorow, M., Feunteun, E., Frankowski, J., Griffioen, A. B., Monteiro, R. M., Moore, A., Oldoni, D., Piper, A. T., …Reubens, J. (2025). The Seaward Migration of European Eel at a Continental Scale: A Europe-Wide Biotelemetry Meta-Analysis. Fish and Fisheries, 26(4), 651-668. https://doi.org/10.1111/faf.12904

The European eel (Anguilla anguilla L.) has a catadromous life cycle, with a single panmictic population that colonises continental Europe and northern Africa yet migrates 5000 to 9000 km to spawn in the Atlantic Ocean. It is unknown how this contine... Read More about The Seaward Migration of European Eel at a Continental Scale: A Europe-Wide Biotelemetry Meta-Analysis.

The influence of hydrodynamics on the behaviour of European Eel at anthropogenic structures (2025)
Thesis
Collier, S. (2025). The influence of hydrodynamics on the behaviour of European Eel at anthropogenic structures. (Thesis). University of Hull. https://hull-repository.worktribe.com/output/5086316

Highly fragmented river networks in the UK pose a serious threat to the viability of anadromous fish, including the critically endangered European eel (Anguilla anguilla), thus necessitating remediation at anthropogenic riverine obstructions to resto... Read More about The influence of hydrodynamics on the behaviour of European Eel at anthropogenic structures.

Genotype But Not Body Shape Predicts River Migration Success in Atlantic Salmon (2024)
Journal Article
Moccetti, P., Bolland, J. D., Adams, C. E., Rodger, J. R., Honkanen, H. M., Newton, M., Lothian, A. J., Nunn, A. D., & Joyce, D. A. (2024). Genotype But Not Body Shape Predicts River Migration Success in Atlantic Salmon. Ecology and Evolution, 14(12), Article e70682. https://doi.org/10.1002/ece3.70682

Migratory species typically undertake demanding long-distance journeys, across different habitat types during which they are exposed to multiple natural and anthropogenic stressors. Mortality during migration is typically high and may be human induce... Read More about Genotype But Not Body Shape Predicts River Migration Success in Atlantic Salmon.

Two decades of body length measurements of larval and juvenile fish populations in English rivers (2024)
Journal Article
Ainsworth, R. F., Vickers, L. H., Bolland, J. D., Taylor, M. J., Harvey, J. P., Noble, R. A., Cowx, I. G., & Nunn, A. D. (2024). Two decades of body length measurements of larval and juvenile fish populations in English rivers. Scientific Data, 11, Article 1271. https://doi.org/10.1038/s41597-024-04127-w

Long-term datasets provide context and understanding of complex ecological processes, including temporal variations in species diversity and ecosystem dynamics. This dataset is comprised of body length measurements (mm) of more than 380,000 larval or... Read More about Two decades of body length measurements of larval and juvenile fish populations in English rivers.

Two decades of body length measurements in size-structured larval and juvenile fish populations in English rivers (2024)
Data
Ainsworth, R., Vickers, L., Bolland, J., Harvey, J., Taylor, M., Cowx, I., Noble, R., & Nunn, A. (2024). Two decades of body length measurements in size-structured larval and juvenile fish populations in English rivers. [Data]. https://doi.org/10.5281/zenodo.10552216

Long term ecological datasets are valuable in providing context and understanding to complex ecological processes that occur over broad temporal scales, and provide a baseline for analysing change. Monitoring of fish populations in UK waterbodies and... Read More about Two decades of body length measurements in size-structured larval and juvenile fish populations in English rivers.

Inter-annual variation in movements and passage of seaward migrating European eels at a shrouded Archimedean screw pumping station (2024)
Journal Article
Evans, O. J., Carter, L. J., Hutchinson, T., Don, A., Wright, R. M., Baktoft, H., Pauwels, I. S., & Bolland, J. D. (2024). Inter-annual variation in movements and passage of seaward migrating European eels at a shrouded Archimedean screw pumping station. Ecological engineering, 209, Article 107389. https://doi.org/10.1016/j.ecoleng.2024.107389

The construction of less damaging (here called fish-friendly) pumping stations has taken place in recent years, but it is unknown if they provide efficient and timely passage to migratory fish, such as European eel (Anguilla anguilla (L.)). The pump... Read More about Inter-annual variation in movements and passage of seaward migrating European eels at a shrouded Archimedean screw pumping station.

Rethinking fish-friendliness of pumps by shifting focus to both safe and timely fish passage for effective conservation (2024)
Journal Article
Evans, O. J., Norman, J., Carter, L. J., Hutchinson, T., Don, A., Wright, R. M., Tuhtan, J. A., Toming, G., & Bolland, J. D. (2024). Rethinking fish-friendliness of pumps by shifting focus to both safe and timely fish passage for effective conservation. Scientific reports, 14(1), Article 17888. https://doi.org/10.1038/s41598-024-67870-5

Globally, catadromous freshwater eels of the genus Anguilla are of conservation concern, including critically endangered European eel (Anguilla anguilla). Pumping stations that move river water to a higher elevation severely impact eels during their... Read More about Rethinking fish-friendliness of pumps by shifting focus to both safe and timely fish passage for effective conservation.

Spatial ecology and population dynamics of brown trout Salmo trutta L. in reservoirs and headwater tributaries (2024)
Journal Article
Dodd, J. R., Noble, R. A., Nunn, A. D., Owen, H. M., Moccetti, P., Harvey, J. P., Wallace, L., Gillespie, B., Joyce, D. A., & Bolland, J. D. (2025). Spatial ecology and population dynamics of brown trout Salmo trutta L. in reservoirs and headwater tributaries. Journal of fish biology, 106(5), 1495-1509. https://doi.org/10.1111/jfb.15814

This investigation compared the spatial ecology and population dynamics of brown trout Salmo trutta L. between reservoirs with (impact; Langsett Reservoir) and without (control; Grimwith Reservoir) barriers to fish movements into headwater tributarie... Read More about Spatial ecology and population dynamics of brown trout Salmo trutta L. in reservoirs and headwater tributaries.

Variability in the summer movements, habitat use and thermal biology of two fish species in a temperate river (2024)
Journal Article
Amat-Trigo, F., Tarkan, A. S., Andreou, D., Aksu, S., Bolland, J. D., Gillingham, P. K., Roberts, C. G., Yeldham, M. I. A., & Britton, J. R. (2024). Variability in the summer movements, habitat use and thermal biology of two fish species in a temperate river. Aquatic sciences, 86(3), Article 65. https://doi.org/10.1007/s00027-024-01073-y

The ability of fish to cope with warm water temperatures in summer depends on factors including their thermal traits and the ability of individuals to access cool-water refugia. Knowledge is highly limited on the in situ responses of many fishes to e... Read More about Variability in the summer movements, habitat use and thermal biology of two fish species in a temperate river.

Movements and habitat use of native and invasive piscivorous fishes in a temperate and channelized lowland river (2024)
Journal Article
Nolan, E. T., Hindes, A. M., Bolland, J. D., Davies, P., Gutmann Roberts, C., Tarkan, A. S., & Britton, J. R. (2024). Movements and habitat use of native and invasive piscivorous fishes in a temperate and channelized lowland river. Hydrobiologia, https://doi.org/10.1007/s10750-024-05533-2

Lowland temperate rivers provide important habitats for piscivorous fishes, but with their year-round spatial and temporal habitat use is often poorly understood, including their use of off-channel habitats. Here, the movements and habitat use of the... Read More about Movements and habitat use of native and invasive piscivorous fishes in a temperate and channelized lowland river.

Genetic consequences of improved river connectivity in brown trout (Salmo trutta L.) (2024)
Journal Article
Moccetti, P., Dodd, J. R., Joyce, D. A., Nunn, A. D., Gillespie, B., & Bolland, J. D. (2024). Genetic consequences of improved river connectivity in brown trout (Salmo trutta L.). Evolutionary Applications, 17(4), Article e13660. https://doi.org/10.1111/eva.13660

Fragmentation of watercourses poses a significant threat to biodiversity, particularly for migratory fish species. Mitigation measures such as fishways, have been increasingly implemented to restore river connectivity and support fish migration. The... Read More about Genetic consequences of improved river connectivity in brown trout (Salmo trutta L.).

Tracking aquatic animals for fisheries management in European waters (2024)
Journal Article
Özgül, A., Birnie-Gauvin, K., Abecasis, D., Alós, J., Aarestrup, K., Reubens, J., Bolland, J., Lök, A., Edwards, J. E., Pengal, P., Prchalová, M., Říha, M., Pickholtz, R., Vollset, K. W., Afonso, P., Davidsen, J. G., Arlinghaus, R., Ünal, V., & Lennox, R. J. (2024). Tracking aquatic animals for fisheries management in European waters. Fisheries Management and Ecology, Article e12706. https://doi.org/10.1111/fme.12706

Acoustic telemetry (AT) has emerged as a valuable tool for monitoring aquatic animals in both European inland and marine waters over the past two decades. The European Tracking Network (ETN) initiative has played a pivotal role in promoting collabora... Read More about Tracking aquatic animals for fisheries management in European waters.

Tracking repeat spawning anadromous fish migrations over multiple years in a fragmented river suggests philopatry and sex-linked variation in space use (2024)
Journal Article
Davies, P., Britton, J. R., Andreou, D., Crundwell, C., Dodd, J. R., Lepais, O., Nunn, A. D., Sabatino, S., Velterop, R., & Bolland, J. D. (2024). Tracking repeat spawning anadromous fish migrations over multiple years in a fragmented river suggests philopatry and sex-linked variation in space use. Aquatic sciences, 86(2), https://doi.org/10.1007/s00027-024-01048-z

There is limited knowledge of how philopatry influences the spatial ecology of iteroparous anadromous species during their spawning migrations, but this knowledge is important in understanding population responses to interventions such as river recon... Read More about Tracking repeat spawning anadromous fish migrations over multiple years in a fragmented river suggests philopatry and sex-linked variation in space use.

Emigration of post-spawned twaite shad Alosa fallax, an anadromous and iteroparous fish, in a highly fragmented river (2024)
Journal Article
Yeldham, M. I., Britton, J. R., Crundwell, C., Davies, P., Dodd, J. R., Nunn, A. D., Velterop, R., & Bolland, J. D. (2024). Emigration of post-spawned twaite shad Alosa fallax, an anadromous and iteroparous fish, in a highly fragmented river. Journal of fish biology, https://doi.org/10.1111/jfb.15713

Anthropogenic barriers are widely known to negatively impact the spawning migrations of anadromous fishes, by delaying or preventing passage upstream. Although the impacts of barriers on emigrating post-spawned adults are less well studied, they coul... Read More about Emigration of post-spawned twaite shad Alosa fallax, an anadromous and iteroparous fish, in a highly fragmented river.

Ex situ experimentation to determine if introduced artificial habitat can provide alternative refuge to hazardous anthropogenic structures (2024)
Journal Article
Norman, J., Clark, D., Henshaw, A., Wright, R. M., Cattaneo, M. E. G. V., & Bolland, J. D. (2024). Ex situ experimentation to determine if introduced artificial habitat can provide alternative refuge to hazardous anthropogenic structures. Restoration Ecology, Article e14157. https://doi.org/10.1111/rec.14157

Highly degraded lowland river ecosystems are of global concern to restoration practitioners. Hazardous anthropogenic structures, such as those used for water level management (i.e. pumping stations), present a mortality risk to fish and associated ch... Read More about Ex situ experimentation to determine if introduced artificial habitat can provide alternative refuge to hazardous anthropogenic structures.

Factors influencing European river lamprey passage at a tidal river barrier (2024)
Journal Article
Lothian, A. J., Bolland, J. D., Albright, A. J., Jubb, W. M., Bubb, D. H., Noble, R. A., Nunn, A. D., Dodd, J. R., Tummers, J. S., & Lucas, M. C. (2024). Factors influencing European river lamprey passage at a tidal river barrier. Hydrobiologia, https://doi.org/10.1007/s10750-024-05633-z

Understanding and improving passage by diadromous species at tidal barriers is less well advanced than that for non-tidal anthropogenic river barriers. This study assessed factors affecting upstream passage of anadromous river lamprey (Lampetra fluvi... Read More about Factors influencing European river lamprey passage at a tidal river barrier.

Can't pass or won't pass: the importance of motivation when quantifying improved connectivity for riverine brown trout Salmo trutta (2023)
Journal Article
Dodd, J. R., Cowx, I. G., Joyce, D. A., & Bolland, J. D. (in press). Can't pass or won't pass: the importance of motivation when quantifying improved connectivity for riverine brown trout Salmo trutta. Journal of fish biology, https://doi.org/10.1111/jfb.15628

Reversing the negative impacts that anthropogenic habitat fragmentation has on animal movement is a key goal in the management of landscapes and conservation of species globally. Accurate assessment of measures to remediate habitat fragmentation, suc... Read More about Can't pass or won't pass: the importance of motivation when quantifying improved connectivity for riverine brown trout Salmo trutta.

Impact of anthropogenic infrastructure on aquatic and avian predator–prey interactions in a modified lowland river (2023)
Journal Article
Norman, J., Reeds, J., Wright, R. M., & Bolland, J. D. (in press). Impact of anthropogenic infrastructure on aquatic and avian predator–prey interactions in a modified lowland river. Freshwater biology, https://doi.org/10.1111/fwb.14201

The relationship between aquatic and avian predators and prey is a fundamental process that influences the ecological dynamics of freshwater communities; a landscape of fear underpins spatial and temporal habitat use of prey, i.e., non-consumptive pr... Read More about Impact of anthropogenic infrastructure on aquatic and avian predator–prey interactions in a modified lowland river.