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Dr Andy Nunn's Outputs (68)

Responses of fish to nationwide improvements in the water quality of a densely populated and heavily modified country over four decades (2025)
Journal Article
Nunn, A. D., Ainsworth, R. F., Qu, Y., Keller, V. D., Bachiller-Jareno, N., Antoniou, V., Eastman, M., Rizzo, C., Peirson, G., Eley, F., Johnson, A. C., & Cowx, I. G. (2025). Responses of fish to nationwide improvements in the water quality of a densely populated and heavily modified country over four decades. Water Research, 274, Article 123163. https://doi.org/10.1016/j.watres.2025.123163

Globally, fish have been severely affected by the widespread, chronic degradation of fresh waters, with a substantial proportion of species declining in abundance or range in recent decades. This has especially been the case in densely populated coun... Read More about Responses of fish to nationwide improvements in the water quality of a densely populated and heavily modified country over four decades.

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.

The genome sequence of the Eurasian minnow, Phoxinus phoxinus (Linnaeus, 1758) (2024)
Journal Article
Nunn, A. D., Moccetti, P., & Hänfling, B. (in press). The genome sequence of the Eurasian minnow, Phoxinus phoxinus (Linnaeus, 1758). Wellcome Open Research, 9, Article 504. https://doi.org/10.12688/wellcomeopenres.22867.1

We present a genome assembly from an individual female Phoxinus phoxinus (the Eurasian minnow; Chordata; Actinopteri; Cypriniformes; Leuciscidae). The genome sequence spans 950.50 megabases. Most of the assembly is scaffolded into 25 chromosomal pseu... Read More about The genome sequence of the Eurasian minnow, Phoxinus phoxinus (Linnaeus, 1758).

The genome sequence of the gudgeon, Gobio gobio (Linnaeus, 1758) [Version 1] (2024)
Journal Article
Nunn, A. D., Moccetti, P., Hänfling, B., Wellcome Sanger Institute Tree of Life Management, Samples and Laboratory team, Wellcome Sanger Institute Scientific Operations: Sequencing Operations, Wellcome Sanger Institute Tree of Life Core Informatics team, Tree of Life Core Informatics collective, & Darwin Tree of Life Consortium. (2024). The genome sequence of the gudgeon, Gobio gobio (Linnaeus, 1758) [Version 1]. Wellcome Open Research, 9, Article 409. https://doi.org/10.12688/wellcomeopenres.22742.1

We present a genome assembly from an individual female Gobio gobio (the gudgeon; Chordata; Actinopteri; Cypriniformes; Gobionidae). The genome sequence spans 1,460.70 megabases. Most of the assembly is scaffolded into 25 chromosomal pseudomolecules.... Read More about The genome sequence of the gudgeon, Gobio gobio (Linnaeus, 1758) [Version 1].

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.

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.

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.

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.

The genome sequence of the stone loach, Barbatula barbatula (Linnaeus, 1758) (2023)
Journal Article
Hänfling, B., Nunn, A. D., Moccetti, P., & Darwin Tree of Life Consortium. (2023). The genome sequence of the stone loach, Barbatula barbatula (Linnaeus, 1758). Wellcome Open Research, 8, Article 518. https://doi.org/10.12688/wellcomeopenres.20293.1

We present a genome assembly from an individual female Barbatula barbatula (the stone loach; Chordata; Actinopteri; Cypriniformes; Nemacheilidae). The genome sequence is 617.6 megabases in span. Most of the assembly is scaffolded into 25 chromosomal... Read More about The genome sequence of the stone loach, Barbatula barbatula (Linnaeus, 1758).

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.

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., Albright, A. J., Bubb, D. H., Lucas, M. C., & 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.

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., Mateus, C. S., Bolland, J. D., Dodd, J. R., Almeida, P. R., Dominguez Almela, V., & 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., Bubb, D. H., Lucas, M. C., & 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.

Tracking anadromous fish over successive freshwater migrations reveals the influence of tagging effect, previous success, and abiotic factors on upstream passage over barriers (2023)
Journal Article
Davies, P., Robert Britton, J., Castro-Santos, T., Crundwell, C., Dodd, J. R., Nunn, A. D., Velterop, R., & Bolland, J. D. (2023). Tracking anadromous fish over successive freshwater migrations reveals the influence of tagging effect, previous success, and abiotic factors on upstream passage over barriers. Canadian journal of fisheries and aquatic sciences, 80(7), 1110-1125. https://doi.org/10.1139/cjfas-2022-0196

Predicting and mitigating the impact of anthropogenic barriers on migratory fish requires an understanding of the individual and environmental factors that influence barrier passage. Here, the upstream spawning migrations of iteroparous twaite shad A... Read More about Tracking anadromous fish over successive freshwater migrations reveals the influence of tagging effect, previous success, and abiotic factors on upstream passage over barriers.

Understanding the impact of barriers to onward migration; a novel approach using translocated fish (2023)
Journal Article
Jubb, W. M., Noble, R. A., Dodd, J. R., Nunn, A. D., Lothian, A. J., Albright, A. J., Bubb, D. H., Lucas, M. C., & Bolland, J. D. (2023). Understanding the impact of barriers to onward migration; a novel approach using translocated fish. Journal of environmental management, 335, Article 117488. https://doi.org/10.1016/j.jenvman.2023.117488

River catchments worldwide are heavily fragmented by anthropogenic barriers, reducing their longitudinal connectivity and contributing to the decline of migratory fish populations. Direct impacts of individual barriers on migratory fish are well-esta... Read More about Understanding the impact of barriers to onward migration; a novel approach using translocated fish.