Skip to main content

Research Repository

Advanced Search

All Outputs (57)

Larval and juvenile fish abundance, habitat, water quality, flow and climate data from English rivers, 1984-2017 (2025)
Data
(2025). Larval and juvenile fish abundance, habitat, water quality, flow and climate data from English rivers, 1984-2017. [Data]. https://doi.org/10.5285/c904c5f0-7f21-4759-a7d4-c262da230b53

This dataset contains monthly/annual time series of species-specific abundances and covariates for 137 targeted larval/juvenile fish surveys at sites in a range of English lowland rivers. Larval/juvenile fish data come from two different sources: The... Read More about Larval and juvenile fish abundance, habitat, water quality, flow and climate data from English rivers, 1984-2017.

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. (online). Spatial ecology and population dynamics of brown trout Salmo trutta L. in reservoirs and headwater tributaries. Journal of fish biology, 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.

Fish abundance, habitat, water quality, flow and climate data from English rivers,1975-2017 (2024)
Data
Ainsworth, R., Keller, V., Bachiller- Jareno, N., Jürgens, M., Eastman, M., Sadykova, D., Rizzo, C., Scarlett, P., Peirson, G., Eley, F., Antoniou, V., Cowx, I., Johnson, A., & Nunn, A. (2024). Fish abundance, habitat, water quality, flow and climate data from English rivers,1975-2017. [Data]. https://doi.org/10.5285/b0afb78e-a0cb-4762-9220-659211ae3a5e

This dataset contains a time series of species-specific fish abundances and covariates for 1180 fish sites in English rivers. Sites with at least ten annual fish surveys in the Environment Agency’s (EA) National Fish Population Database (NFPD) betwee... Read More about Fish abundance, habitat, water quality, flow and climate data from English rivers,1975-2017.

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 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.

Extinction risks and threats facing the freshwater fishes of Britain (2023)
Journal Article
Nunn, A. D., Ainsworth, R. F., Walton, S., Bean, C. W., Hatton-Ellis, T. W., Brown, A., Evans, R., Atterborne, A., Ottewell, D., & Noble, R. A. (in press). Extinction risks and threats facing the freshwater fishes of Britain. Aquatic conservation : marine and freshwater ecosystems, https://doi.org/10.1002/aqc.4014

Extinctions occur naturally in all environments, but rates have accelerated rapidly during the Anthropocene, especially in fresh water. Despite supporting many fish species of conservation importance, there has never been a formal assessment of their... Read More about Extinction risks and threats facing the freshwater fishes of Britain.

Regional IUCN Redlist for Freshwater and Diadromous Fishes of Great Britain (England, Scotland and Wales) (2023)
Data
Nunn, A., Ainsworth, R., & Noble, R. (2023). Regional IUCN Redlist for Freshwater and Diadromous Fishes of Great Britain (England, Scotland and Wales). [Data]. https://doi.org/10.5281/zenodo.7940246

A regional IUCN redlist assessment of extinction risk for freshwater and diadromous fishes in Great Britain, including assessments for Engand, Scotland and Wales. The dataset comprises summary data for assessments under Criteria A-E and narratives to... Read More about Regional IUCN Redlist for Freshwater and Diadromous Fishes of Great Britain (England, Scotland and Wales).

Upstream spawning migration of river lamprey (Lampetra fluviatilis) in the River Yorkshire Ouse, 2018-2020 (2023)
Data
Bolland, J. D., Jubb, W. M., Noble, R. A. A., Nunn, A. D., Dodd, J. R., Lucas, M. C., Lothian, A. J., Bubb, D. H., & Albright, A. J. (2023). Upstream spawning migration of river lamprey (Lampetra fluviatilis) in the River Yorkshire Ouse, 2018-2020. [Data]. https://doi.org/10.14284/623

This study investigated the upstream spawning migration of anadromous river lamprey in the Yorkshire Ouse, a highly dendritic and heavily fragmented tributary of the Humber Estuary (home to one of the largest UK river lamprey populations). The main E... Read More about Upstream spawning migration of river lamprey (Lampetra fluviatilis) in the River Yorkshire Ouse, 2018-2020.

Upstream spawning migration of river lamprey (Lampetra fluviatilis) in the River Trent, 2020-2021 (2023)
Data
Noble, R. A. A., Bolland, J. D., Jubb, W. M., Nunn, A. D., & Dodd, J. R. (2023). Upstream spawning migration of river lamprey (Lampetra fluviatilis) in the River Trent, 2020-2021. [Data]. https://doi.org/10.14284/598

This study investigated the upstream spawning migration of anadromous river lamprey (Lampetra fluviatilis) in the River Trent, a heavily fragmented tributary of the Humber Estuary- the location of one of the largest river lamprey populations in the U... Read More about Upstream spawning migration of river lamprey (Lampetra fluviatilis) in the River Trent, 2020-2021.

Individual movement variation in upstream-migrating sea lamprey Petromyzon marinus in a highly fragmented river (2022)
Journal Article
Davies, P., Britton, J. R., Nunn, A. D., Dodd, J. R., Bainger, C., Velterop, R., & Bolland, J. D. (in press). Individual movement variation in upstream-migrating sea lamprey Petromyzon marinus in a highly fragmented river. Freshwater biology, https://doi.org/10.1111/fwb.13869

Anthropogenic reductions in riverine connectivity can severely impede the migrations of anadromous species. In fragmented rivers, successful migrations depend on the ability of migrants to negotiate barriers or locate alternative passage routes. Howe... Read More about Individual movement variation in upstream-migrating sea lamprey Petromyzon marinus in a highly fragmented river.

Cumulative impacts of habitat fragmentation and the environmental factors affecting upstream migration in the threatened sea lamprey, Petromyzon marinus (2021)
Journal Article
Davies, P., Britton, J. R., Nunn, A. D., Dodd, J. R., Bainger, C., Velterop, R., & Bolland, J. D. (2021). Cumulative impacts of habitat fragmentation and the environmental factors affecting upstream migration in the threatened sea lamprey, Petromyzon marinus. Aquatic conservation : marine and freshwater ecosystems, 31(9), 2560-2574. https://doi.org/10.1002/aqc.3625

River ecosystems are often fragmented by artificial structures, such as weirs. For anadromous species, these structures can impede access to upstream spawning sites and ultimately lead to severe population declines. This study focused on the freshwat... Read More about Cumulative impacts of habitat fragmentation and the environmental factors affecting upstream migration in the threatened sea lamprey, Petromyzon marinus.

An integrated decision driven design framework to support the ecological restoration of rivers (2021)
Journal Article
King, M., van Zyll de Jong, M., Piercey, D., Nunn, A. D., & Cowx, I. G. (in press). An integrated decision driven design framework to support the ecological restoration of rivers. Journal of Environmental Planning and Management, 1-24. https://doi.org/10.1080/09640568.2021.1932772

A structured and collaborative approach to design and decision‐making in the context of ecological restoration of rivers is developed and illustrated using a case study involving the mitigation of physical barriers to fish migration on the River Tren... Read More about An integrated decision driven design framework to support the ecological restoration of rivers.

Novel insights into the marine phase and river fidelity of anadromous twaite shad Alosa fallax in the UK and Ireland (2020)
Journal Article
Davies, P., Britton, R. J., Nunn, A. D., Dodd, J. R., Crundwell, C., Velterop, R., Ó’Maoiléidigh, N., O’Neill, R., Sheehan, E., Stamp, T., & Bolland, J. (2020). Novel insights into the marine phase and river fidelity of anadromous twaite shad Alosa fallax in the UK and Ireland. Aquatic conservation : marine and freshwater ecosystems, 30(7), 1291-1298. https://doi.org/10.1002/aqc.3343

© 2020 The Authors. Most research on anadromous fishes has been invested in their freshwater life-phases, resulting in a relatively sparse understanding of their spatial ecology during marine life-phases. However, understanding the marine dispersal... Read More about Novel insights into the marine phase and river fidelity of anadromous twaite shad Alosa fallax in the UK and Ireland.

Dynamic competition and resource partitioning during the early life of two widespread, abundant and ecologically similar fishes (2020)
Journal Article
Nunn, A. D., Vickers, L., Mazik, K., Bolland, J., Peirson, G., Axford, S., Henshaw, A., & Cowx, I. G. (2020). Dynamic competition and resource partitioning during the early life of two widespread, abundant and ecologically similar fishes. Hydrobiologia, 847, 2211-2224. https://doi.org/10.1007/s10750-020-04247-5

Competition and resource partitioning can have profound implications for individuals, populations and communities, and thus food webs, ecosystems and the management of biota and environments. In many species, the impacts of competition and resource p... Read More about Dynamic competition and resource partitioning during the early life of two widespread, abundant and ecologically similar fishes.

The Response of River-Resident Fish to Reservoir Freshet Releases of Varying Profiles Intended to Facilitate a Spawning Migration (2020)
Journal Article
Baker, N. J., Taylor, M. J., Harvey, J. P., Angelopoulos, N. V., Smith, M. A., Noble, R. A., Tinsdeall, M., Bolland, J. D., Baxter, J., Baker, N., Taylor, M., Cowx, I. G., Harvey, J., Nunn, A. D., Angelopoulos, N., Smith, M., Noble, R., Tinsdeall, M., Baxter, J., & Bolland, J. (2020). The Response of River-Resident Fish to Reservoir Freshet Releases of Varying Profiles Intended to Facilitate a Spawning Migration. Water Resources Research, 56(6), Article e2018WR024196. https://doi.org/10.1029/2018WR024196

Natural hydrological regimes encompass varying seasonal flow characteristics that provide fish with cues and opportunities for upstream spawning migrations, but these flows are often modified/absent in regulated rivers. Compensatory artificial flows... Read More about The Response of River-Resident Fish to Reservoir Freshet Releases of Varying Profiles Intended to Facilitate a Spawning Migration.

Refinement of acoustic-tagging protocol for twaite shad Alosa fallax (Lacépède), a species sensitive to handling and sedation (2019)
Journal Article
Bolland, J. D., Nunn, A. D., Angelopoulos, N. V., Dodd, J. R., Davies, P., Gutmann Roberts, C., Britton, J. R., & Cowx, I. G. (2019). Refinement of acoustic-tagging protocol for twaite shad Alosa fallax (Lacépède), a species sensitive to handling and sedation. Fisheries research, 212, 183-187. https://doi.org/10.1016/j.fishres.2018.12.006

© 2018 Elsevier B.V. Telemetry investigations to gather essential information about fish migrations are reliant on the behaviour, condition and survival of the animals being unaltered by the tagging procedure. Twaite shad (Alosa fallax Lacépède; 'sha... Read More about Refinement of acoustic-tagging protocol for twaite shad Alosa fallax (Lacépède), a species sensitive to handling and sedation.

Causes and consequences of ontogenetic dietary shifts: a global synthesis using fish models (2018)
Journal Article
Sánchez-Hernández, J., Nunn, A. D., Adams, C. E., & Amundsen, P.-A. (2019). Causes and consequences of ontogenetic dietary shifts: a global synthesis using fish models. Biological Reviews, 94(2), 539-554. https://doi.org/10.1111/brv.12468

Ontogenetic dietary shifts (ODSs), the changes in diet utilisation occurring over the life span of an individual consumer, are widespread in the animal kingdom. Understanding ODSs provides fundamental insights into the biological and ecological proce... Read More about Causes and consequences of ontogenetic dietary shifts: a global synthesis using fish models.