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Dr Jon Bolland

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Jon Bolland

Post Doctoral Research Assistant


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.

Timing is everything; operational changes at a pumping station with a gravity sluice to provide safe downstream passage for silver European eels and deliver considerable financial savings (2023)
Journal Article
Carter, L. J., Wright, R. M., Thomas, R. E., Reeds, J., Murphy, L. A., Collier, S. J., …Bolland, J. D. (2023). Timing is everything; operational changes at a pumping station with a gravity sluice to provide safe downstream passage for silver European eels and deliver considerable financial savings. Journal of environmental management, 347, Article 119143. https://doi.org/10.1016/j.jenvman.2023.119143

Catadromous European eel (Anguilla anguilla) are a critically endangered fish species due in part to in-river anthropogenic barriers (e.g., pumping stations, weirs, hydropower facilities). European legislation stipulates that safe downstream passage... Read More about Timing is everything; operational changes at a pumping station with a gravity sluice to provide safe downstream passage for silver European eels and deliver considerable financial savings.

Catchment-wide interactive effects of anthropogenic structures and river levels on fish spawning migrations (2023)
Journal Article
Jubb, W. M., Noble, R. A., Dodd, J. R., Nunn, A. D., Schirrmacher, P., Lothian, A. J., …Bolland, J. D. (2023). Catchment-wide interactive effects of anthropogenic structures and river levels on fish spawning migrations. Anthropocene, 43, Article 100400. https://doi.org/10.1016/j.ancene.2023.100400

Worldwide, rivers are extensively fragmented by anthropogenic structures, reducing longitudinal connectivity, inhibiting migration and leading to severe declines in many fish populations, especially for diadromous species. However, few studies have d... Read More about Catchment-wide interactive effects of anthropogenic structures and river levels on fish spawning migrations.

The impact of extreme flood-relief pump operations on resident fish in an artificial drain and the potential for artificial habitat introduction (2023)
Journal Article
Norman, J., Reeds, J., Wright, R. M., & Bolland, J. D. (in press). The impact of extreme flood-relief pump operations on resident fish in an artificial drain and the potential for artificial habitat introduction. Fisheries Management and Ecology, https://doi.org/10.1111/fme.12636

Fish are ubiquitous in pumped artificial drains but channel maintenance exposes fish to high flows and predators, and fish communities may experience population-level threats if they are unable to access refuge during extreme flood-relief pump operat... Read More about The impact of extreme flood-relief pump operations on resident fish in an artificial drain and the potential for artificial habitat introduction.

Seascape genomics reveals limited dispersal and suggests spatially varying selection among European populations of sea lamprey (Petromyzon marinus) (2023)
Journal Article
Baltazar-Soares, M., Britton, J. R., Pinder, A., Harrison, A. J., Nunn, A. D., Quintella, B. R., …Andreou, D. (2023). Seascape genomics reveals limited dispersal and suggests spatially varying selection among European populations of sea lamprey (Petromyzon marinus). Evolutionary Applications, 16(6), 1169-1183. https://doi.org/10.1111/eva.13561

Sea lamprey Petromyzon marinus is an anadromous and semelparous fish without homing behaviors. Despite being a freshwater, free-living organism for a large part of their life cycle, its adulthood is spent as a parasite of marine vertebrates. In their... Read More about Seascape genomics reveals limited dispersal and suggests spatially varying selection among European populations of sea lamprey (Petromyzon marinus).

Acoustic telemetry informs conditional capture probability of an anadromous fish (2023)
Journal Article
Jubb, W. M., Noble, R. A., Dodd, J. R., Nunn, A. D., Lothian, A. J., Albright, A. J., …Bolland, J. D. (2023). Acoustic telemetry informs conditional capture probability of an anadromous fish. Fisheries research, 264, Article 106737. https://doi.org/10.1016/j.fishres.2023.106737

Information on movement ecology and susceptibility to fishing gears is becoming increasingly employed in the management of commercial fisheries. This study combined acoustic telemetry (n = 51 and 52) and a simple passive integrated transponder (PIT)... Read More about Acoustic telemetry informs conditional capture probability of an anadromous fish.

Using acoustic tracking of an anadromous lamprey in a heavily fragmented river to assess current and historic passage opportunities and prioritise remediation (2023)
Journal Article
Jubb, W. M., Noble, R. A., Dodd, J. R., Nunn, A. D., & Bolland, J. D. (in press). Using acoustic tracking of an anadromous lamprey in a heavily fragmented river to assess current and historic passage opportunities and prioritise remediation. River Research and Applications, https://doi.org/10.1002/rra.4140

Anthropogenic structures extensively fragment riverine systems, reducing longitudinal connectivity, inhibiting migration and leading to severe declines in many fish populations, especially for diadromous species. This study investigated the upstream... Read More about Using acoustic tracking of an anadromous lamprey in a heavily fragmented river to assess current and historic passage opportunities and prioritise remediation.

The influence of passive wedge-wire screen aperture and flow velocity on juvenile European eel exclusion, impingement and passage (2023)
Journal Article
Carter, L. J., Collier, S. J., Thomas, R. E., Norman, J., Wright, R. M., & Bolland, J. D. (2023). The influence of passive wedge-wire screen aperture and flow velocity on juvenile European eel exclusion, impingement and passage. Ecological engineering, 192, Article 106972. https://doi.org/10.1016/j.ecoleng.2023.106972

The European eel (Anguilla anguilla) is a critically endangered catadromous fish. The decline has partly been attributed to water management infrastructure that abstract water from rivers for potable and industrial water supply, irrigation, hydroelec... Read More about The influence of passive wedge-wire screen aperture and flow velocity on juvenile European eel exclusion, impingement and passage.

Understanding the temporal dynamics of a lowland river fish community at a hazardous intake and floodgate to inform safe operation (2023)
Journal Article
Norman, J., Wright, R. M., Don, A., & Bolland, J. D. (2023). Understanding the temporal dynamics of a lowland river fish community at a hazardous intake and floodgate to inform safe operation. Journal of environmental management, 336, Article 117716. https://doi.org/10.1016/j.jenvman.2023.117716

Entrainment and mortality of freshwater fish at hazardous pumping station intakes used for Flood Risk Management (FRM) are of global concern. Although upstream and downstream passage of diadromous fish has received considerable attention, the ecologi... Read More about Understanding the temporal dynamics of a lowland river fish community at a hazardous intake and floodgate to inform safe operation.