Scientific publications

Many scientific papers have been produced through Unlocking the Severn, or have used scientific monitoring techniques developed by the project. You can find them below.

Click on the image to read the paper. Scroll down for ‘Monitoring Techniques’, ‘Twaite Shad’ and ‘Sea Lamprey’.

Monitoring techniques

Antognazza et al. (2019) Environmental DNA as a non‐invasive sampling tool to detect the spawning distribution of European anadromous shads (Alosa spp.)


Bolland et al. (2019) Refinement of acoustic tagging protocol for twaite shad Alosa fallax
(Lacépède), a species sensitive to handling and sedation.

Antognazza, et al. (2021). Application of eDNA metabarcoding in a fragmented lowland river: Spatial and methodological comparison of fish species composition.

Lowe et al. (2022) A novel method for identifying coded tags recorded on aquatic acoustic monitoring systems.

Twaite shad

Davies et al. (2020) Novel insights into the marine phase and river fidelity of anadromous twaite shad Alosa fallax in the UK and Ireland.

Davies et al. (2021) Movement ecology of two threatened anadromous species, twaite shad Alosa fallax and sea lamprey Petromyzon marinus, revealed by acoustic telemetry.

Yeldham et al. (2023) Individual repeatability in the timing of river entry indicates the strong influence of photoperiod in the spawning migrations of iteroparous twaite shad Alosa fallax

Davies et al. (2023) Tracking anadromous fish over successive freshwater migrations reveals the influence of tagging effect, previous success, and abiotic factors on upstream passage over barriers.

Twaite shad continued...

Yeldham et al. (2024) Emigration of post-spawned twaite shad Alosa fallax, an anadromous and iteroparous fish, in a highly fragmented river.

Sea lamprey

Davies et al. (2021) Cumulative impacts of habitat fragmentation and the environmental factors affecting upstream migration in the threatened sea lamprey, Petromyzon marinus.

Davies et al. (2022) Individual movement variation in upstream-migrating sea lamprey Petromyzon marinus in a highly fragmented river.

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