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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.

Comparison of attraction, entrance and passage of downstream migrant American eels (Anguilla rostrata) through airlift and siphon deep entrance bypass systems (2018)
Journal Article
Baker, N., Haro, A., Watten, B., Noreika, J., & Bolland, J. D. (2019). Comparison of attraction, entrance and passage of downstream migrant American eels (Anguilla rostrata) through airlift and siphon deep entrance bypass systems. Ecological engineering, 126, 74-82. https://doi.org/10.1016/j.ecoleng.2018.10.011

© 2018 Downstream migrating anguillid eels face many barriers including turbines and pumps at impoundments for water abstraction, power generation and water level control, when attempting to exit the freshwater catchment to reach spawning grounds. Mu... Read More about Comparison of attraction, entrance and passage of downstream migrant American eels (Anguilla rostrata) through airlift and siphon deep entrance bypass systems.

Direct and indirect impacts of pumping station operation on downstream migration of critically endangered European eel (2018)
Journal Article
Bolland, J. D., Murphy, L. A., Stanford, R. J., Angelopoulos, N. V., Baker, N. J., Wright, R. M., Reeds, J. D., & Cowx, I. G. (2019). Direct and indirect impacts of pumping station operation on downstream migration of critically endangered European eel. Fisheries Management and Ecology, 26(1), 76-85. https://doi.org/10.1111/fme.12312

© 2018 John Wiley & Sons Ltd Downstream passage of European eel Anguilla anguilla (L.) in catchments with pump(s) for water level management is a major concern. Catchment-wide acoustic telemetry revealed silver eels quickly migrated downstream thro... Read More about Direct and indirect impacts of pumping station operation on downstream migration of critically endangered European eel.

Upstream passage of adult sea trout (Salmo trutta) at a low-head weir with an Archimedean screw hydropower turbine and co-located fish pass (2018)
Journal Article
Dodd, J. R., Bolland, J. D., Hateley, J., Cowx, I. G., Walton, S. E., Cattaneo, M. E. G. V., & Noble, R. A. A. (2018). Upstream passage of adult sea trout (Salmo trutta) at a low-head weir with an Archimedean screw hydropower turbine and co-located fish pass. Marine and Freshwater Research, 69(12), 1822-1833. https://doi.org/10.1071/MF18125

© 2018 CSIRO. The exploitation of riverine systems for renewable energy has resulted in large numbers of small-scale hydropower schemes on low-head weirs. Although considered a clean and 'green' energy source in terms of emissions, hydropower can aff... Read More about Upstream passage of adult sea trout (Salmo trutta) at a low-head weir with an Archimedean screw hydropower turbine and co-located fish pass.

Overcoming the dichotomy of implementing societal flood risk management while conserving instream fish habitat – A long-term study from a highly modified urban river (2018)
Journal Article
Angelopoulos, N. V., Harvey, J. P., Bolland, J. D., Nunn, A. D., Noble, R. A., Smith, M. A., Taylor, M. J., Masters, J. E., Moxon, J., & Cowx, I. G. (2018). Overcoming the dichotomy of implementing societal flood risk management while conserving instream fish habitat – A long-term study from a highly modified urban river. Journal of environmental management, 224, 69-76. https://doi.org/10.1016/j.jenvman.2018.07.030

Flood Risk Management (FRM) is often essential to reduce the risk of flooding to properties and infrastructure in urban landscapes, but typically degrades the habitats required by many aquatic animals for foraging, refuge and reproduction. This confl... Read More about Overcoming the dichotomy of implementing societal flood risk management while conserving instream fish habitat – A long-term study from a highly modified urban river.

Win, win, win: Low cost baffle fish pass provides improved passage efficiency, reduced passage time and broadened passage flows over a low-head weir (2018)
Journal Article
Dodd, J. R., Cowx, I. G., & Bolland, J. D. (2018). Win, win, win: Low cost baffle fish pass provides improved passage efficiency, reduced passage time and broadened passage flows over a low-head weir. Ecological engineering, 120(September 2018), 68-75. https://doi.org/10.1016/j.ecoleng.2018.05.028

The number of low-head barriers to fish migration far outweighs the number of large magnitude barriers and thus the cumulative negative impact on fish communities could also be far greater. Removal of man-made obstructions to fish migration is the mo... Read More about Win, win, win: Low cost baffle fish pass provides improved passage efficiency, reduced passage time and broadened passage flows over a low-head weir.

Efficiency of a nature-like bypass channel for restoring longitudinal connectivity for a river-resident population of brown trout (2017)
Journal Article
Dodd, J. R., Cowx, I. G., & Bolland, J. D. (2017). Efficiency of a nature-like bypass channel for restoring longitudinal connectivity for a river-resident population of brown trout. Journal of environmental management, 204(1), 318-326. https://doi.org/10.1016/j.jenvman.2017.09.004

Man-made, physical barriers have disrupted longitudinal connectivity for migratory fish in many river systems throughout the world for centuries. These barriers are considered to be a key reason for the decline of many fish species in river systems.... Read More about Efficiency of a nature-like bypass channel for restoring longitudinal connectivity for a river-resident population of brown trout.

Demography of sea lamprey (Petromyzon marinus) ammocoete populations in relation to potential spawning-migration obstructions (2017)
Journal Article
Nunn, A. D., Taylor, R. J., Cowx, I. G., Noble, R. A. A., Bolland, J. D., & Harvey, J. P. (2017). Demography of sea lamprey (Petromyzon marinus) ammocoete populations in relation to potential spawning-migration obstructions. Aquatic conservation : marine and freshwater ecosystems, 27(4), 764-772. https://doi.org/10.1002/aqc.2748

Copyright © 2017 John Wiley & Sons, Ltd. Recent advances in the understanding of lamprey migrations have led to concerns over the impacts of obstructions on the demography of many species. This study investigated sea lamprey (Petromyzon marinus) la... Read More about Demography of sea lamprey (Petromyzon marinus) ammocoete populations in relation to potential spawning-migration obstructions.

Do fish go with the flow? The effects of periodic and episodic flow pulses on 0+ fish biomass in a constrained lowland river (2016)
Journal Article
Walton, S. E., Nunn, A. D., Probst, W. N., Bolland, J. D., Acreman, M. C., & Cowx, I. G. (2017). Do fish go with the flow? The effects of periodic and episodic flow pulses on 0+ fish biomass in a constrained lowland river. Ecohydrology, 10(1), Article e1777. https://doi.org/10.1002/eco.1777

The hydrological regime is a significant driver of fish population dynamics in rivers, but there is a dearth of information regarding the mechanisms behind its effects on temperate species, especially non-salmonids. This study investigated the effect... Read More about Do fish go with the flow? The effects of periodic and episodic flow pulses on 0+ fish biomass in a constrained lowland river.

A newly identified population of Gambusia affinis (Baird and Girard, 1853), a non-native invasive species, in Lake Kenyir, Malaysia: Implications for management (2015)
Journal Article
Walton, S. E., Ahmad, A. B., Gan, H. M., & Bolland, J. D. (2016). A newly identified population of Gambusia affinis (Baird and Girard, 1853), a non-native invasive species, in Lake Kenyir, Malaysia: Implications for management. BioInvasions Records, 5(2), 107-114. https://doi.org/10.3391/bir.2016.5.2.08

Gambusia affinis (Baird and Girard, 1853), a notorious non-native invasive fish species, has negatively impacted aquatic ecosystems around the world. This species was recently identified in Lake Kenyir, one of the largest impoundments in SouTheast As... Read More about A newly identified population of Gambusia affinis (Baird and Girard, 1853), a non-native invasive species, in Lake Kenyir, Malaysia: Implications for management.

The habitat use of young-of-the-year fishes during and after floods of varying timing and magnitude in a constrained lowland river (2014)
Journal Article
Bolland, J. D., Nunn, A. D., Lucas, M. C., & Cowx, I. G. (2015). The habitat use of young-of-the-year fishes during and after floods of varying timing and magnitude in a constrained lowland river. Ecological engineering, 75(February), 434-440. https://doi.org/10.1016/j.ecoleng.2014.12.009

Globally, channelisation and artificial levee construction have reduced rivers to single-thread channels isolated from their floodplains. These modifications may be particularly detrimental to fish during floods, because of increased severity of cond... Read More about The habitat use of young-of-the-year fishes during and after floods of varying timing and magnitude in a constrained lowland river.

Temporal and spatial variations in the abundance and population structure of the spined loach (Cobitis taenia), a scarce fish species: implications for condition assessment and conservation (2014)
Journal Article
Nunn, A. D., Tewson, L. H., Bolland, J. D., Harvey, J. P., & Cowx, I. G. (2014). Temporal and spatial variations in the abundance and population structure of the spined loach (Cobitis taenia), a scarce fish species: implications for condition assessment and conservation. Aquatic conservation : marine and freshwater ecosystems, 24(6), 818-830. https://doi.org/10.1002/aqc.2451

Effective conservation of protected species requires accurate estimates of the status of their populations. In the UK, this led to the production of a series of sampling protocols to establish the status of designated species against predetermined co... Read More about Temporal and spatial variations in the abundance and population structure of the spined loach (Cobitis taenia), a scarce fish species: implications for condition assessment and conservation.

Flow requirements of non-salmonids (2012)
Journal Article
Cowx, I. G., Noble, R. A., Nunn, A. D., Bolland, J., Walton, S., Peirson, G., & Harvey, J. P. (2012). Flow requirements of non-salmonids. Fisheries Management and Ecology, 19(6), 548-556. https://doi.org/10.1111/fme.12017

Research into the relationships between non-salmonid fish population dynamics and discharge is in its infancy compared with salmonids, thus compromising the ability to manage flows in rivers and maintain ecological status. This study reviews the pote... Read More about Flow requirements of non-salmonids.

A protocol for stocking hatchery reared freshwater pearl mussel Margaritifera margaritifera (2010)
Journal Article
Bolland, J. D., Bracken, L. J., Martin, R., & Lucas, M. C. (2010). A protocol for stocking hatchery reared freshwater pearl mussel Margaritifera margaritifera. Aquatic conservation : marine and freshwater ecosystems, 20(6), 695-704. https://doi.org/10.1002/aqc.1139

1.Freshwater pearl mussel (Margaritifera margaritifera L.) populations are under serious threat of extinction throughout their geographical range and only a few remnant populations are recruiting to adulthood. Consequently, M. margaritifera is classi... Read More about A protocol for stocking hatchery reared freshwater pearl mussel Margaritifera margaritifera.

Retention of Panjet-applied alcian blue by cyprinids (2010)
Journal Article
Bolland, J. D., Cowx, I. G., & Lucas, M. C. (2010). Retention of Panjet-applied alcian blue by cyprinids. Journal of fish biology, 76(4), 1015-1018. https://doi.org/10.1111/j.1095-8649.2009.02525.x

Panjet-applied alcian blue did not produce a reliable long-term ( > 5 months) mark. Average time to mark loss was 9·5 months for chub Leuciscus cephalus, 6·0 months for dace Leuciscus leuciscus and 11·1 months for roach Rutilus rutilus. Growth rate... Read More about Retention of Panjet-applied alcian blue by cyprinids.

Movements and habitat use of wild and stocked juvenile chub, Leuciscus cephalus (L.), in a small lowland river (2008)
Journal Article
Bolland, J., COWX, I. G., & LUCAS, M. C. (2008). Movements and habitat use of wild and stocked juvenile chub, Leuciscus cephalus (L.), in a small lowland river. Fisheries Management and Ecology, 15(5-6), 401-407. https://doi.org/10.1111/j.1365-2400.2008.00631.x

Stocking is a widespread management activity in inland fisheries, but the efficacy of such fishery enhancement measures is poorly understood. Radio-telemetry was used to compare the movements and habitat selection of stocked, juvenile chub, Leuciscus... Read More about Movements and habitat use of wild and stocked juvenile chub, Leuciscus cephalus (L.), in a small lowland river.