I research eel, shad, salmonid & lamprey migration in regulated rivers (pump, hydro, weir & res) @UniOfHull Int’l Fisheries Inst (HIFI). Director @LincsRivers🐟
Joined February 2013
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70 Photos and videos
Pinned Tweet
10 Nov 2018
Our new paper with Conte lab comparing #airlift and #siphon #bypasses for #downstream #passage of silver American #eel. 50 days free access too! Thanks @AquaticSciences!!
#fishmigration #fishpassage #hydropower #anguilla #catadromous #PITtelemetry #video
authors.elsevier.com/c/1Y1pC…
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18 May 2022
RT @ClareDinnisEA: Delighted to spend yesterday with @EnvAgencyMids & @UniOfHull at #SevernHam tagging #TwaiteShad as part of @SevernUnlock…
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Jonathan Bolland retweeted
23 Feb 2022
Faced with barriers to migration, how do animals respond? We found that some sea lamprey stay put downstream of weirs, and others wander substantial distances.
In our new paper we examine the patterns, causes and consequences of this variation
doi.org/10.1111/fwb.13869
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Jonathan Bolland retweeted
8 Nov 2021
Interested in a PhD in #REWILDING? We have 6 fully-funded PhD projects available at the REWILD research cluster at the @UniOfHull on #eDNA, public perceptions, environmental impacts etc. with @DrBlakeMorton @aBugBlog @HopkinsChar @BerndHaenfling @bedform ...
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Jonathan Bolland retweeted
20 Oct 2021
A project ~5y in development but on site <6h to remove 1.3m high & 9m wide weir and >100y of river fragmentation. Opened ~11km to free #fishpassage & #geomorphology
#WeirTodayGoneTomorrow
#damremovaleurope #UAP
Upper Aire Project
@PeteTurnerEA
wildtrout.org/wttblog/newfie…
19 Oct 2021
On the #WTTBlog our @ProfJGrey walks us through the removal of Newfield Bridge weir on the Aire: wildtrout.org/wttblog/newfie…
Response time of the #trout was impressive!
#fishpassage #geomorphology #LetItFlow #damremoval
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Jonathan Bolland retweeted
28 Sep 2021
Tagged sea lamprey struggling to pass weirs in the Severn during their upstream spawning migration. A typical fate for migratory fish in our fragmented river systems, often occurring out of sight ( out of mind?). Read the full story in our new paper here doi.org/10.1002/aqc.3625
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Jonathan Bolland retweeted
22 May 2021
Well this is exciting, my very first article has been published! Check it out if you’re interested in tagging effects and how size of smolts influence outmigration estimates. Thank you for a great collaboration @kwvollset @FisheriesRobert @ErlendMHanssen and more.
21 May 2021
We consistently find that tagged salmon migrate earlier than untagged (see onlinelibrary.wiley.com/doi/…). @MagnusHulbak figured out why! doi.org/10.1111/fme.12495. Larger fish migrates earlier - so if you have size limit of how small salmon you tag you get a biased outmigration date.
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Jonathan Bolland retweeted
6 May 2021
Via the NEW Diglis fish pass, twaite shad can now swim past #Worcester on their #SevernShadRun for the first time in nearly 180yrs! 🎉🐟🎉
Please watch & share our video! #FollowTheShad #FishMigration @CanalRiverTrust @severnrivers @EnvAgencyMids @HeritageFundM_E @LIFEprogramme
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Jonathan Bolland retweeted
3 May 2021
Lovely to see the first run of Twaite shad last week on the Severn. These are a rare freshwater herring which really struggle with barriers to migration.
@SevernUnlocked @severnrivers @ninaconstable @BBCSpringwatch
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Jonathan Bolland retweeted
1 May 2021
On #MayDay let's celebrate the amazing #MayFish migration!
This year's #SevernShadRun is even more special - shimmering #TwaiteShad can swim past Victorian weirs in Worcester for the 1st time in nearly 180 years!
#FollowTheShad #RiverSevern @severnrivers unlockingthesevern.co.uk/202…
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Jonathan Bolland retweeted
29 Apr 2021
I leave @severnrivers in a couple of months, I am asking on those who live, work or play on the Severn to kindly help raise funds for to help this mighty river and its wildlife. Please spread the word
gofund.me/fd6e0865
@IoloWilliams2 @DaveThroupEA @JackPerksPhoto
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Jonathan Bolland retweeted
30 Apr 2021
A little video update from the river bank at the end of a very busy first week of the #RiverSevern shad run!
We'd love to hear any of your #ShadSpotting updates over the bank holiday weekend! Don't forget to tag us and use #SevernShadRun 🐟🐟🐟
#FollowTheShad
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Jonathan Bolland retweeted
30 Apr 2021
Had a great week tagging twaite shad on the Severn, and am excited to find out where they go and what they get up to across the next three years! #ShadSevern #SevernShadRun
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Jonathan Bolland retweeted
26 Apr 2021
Downloading our barbel movement and temperature data, couldn't ask for better weather ☀
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Jonathan Bolland retweeted
23 Apr 2021
It's a beautiful day next to the #RiverSevern. @MYeldham and @FishMigrationDr are out placing acoustic receivers along the river ready for the #SevernShadRun #FollowTheShad @CRTWalesandSW @severnrivers @EnvAgency @BU_Research
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Jonathan Bolland retweeted
7 Apr 2021
Check out this preview clip about @MarineSwansea sea trout acoustic telemetry research with @LizzieDalyWild - BBC1 Wales/IPlayer 9 April at 1935h UTC bbc.co.uk/programmes/p098p9v…
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Jonathan Bolland retweeted
28 Mar 2021
Salmon are very capable jumpers & swimmers but they also have major problems passing Annacotty weir. This ornamental weir delays their migration. They can suffer injuries & all waste valuable energy. Many do not make it upstream.
Please sign the petition: my.uplift.ie/petitions/remov…
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Jonathan Bolland retweeted
24 Mar 2021
BIG NEWS for river dolphins: scientists show that endangered Indus & Ganges river dolphins are 2 separate species
wwf.panda.org/discover/our_f…
@GillBraulik @univofstandrews @_SMRU_ @NOAA @WWFRiverDolphin @WWFPak @WWFINDIA @WWFLeadWildlife @Stuart_Orr
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Jonathan Bolland retweeted
18 Mar 2021
Explore the movement of five fish (incl. barbel) that were tracked with @vemcoteam tags across five years! Data collected across three PhDs; mine, @emmatnolan s and @Pete_Davies1. With @FishMigrationDr and R Britton in collab w. @SevernUnlocked
🐟🎣
unlockingthesevern.co.uk/fis…
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Jonathan Bolland retweeted
17 Mar 2021
Freshwater fish move within the river to use different habitats for feeding, breeding and as refuge. @Pete_Davies1 @CatieGR and will be sharing insights on the freshwater journeys of #TwaiteShad, #Barbel & #SeaLamprey Free Talk TMORO Thurs 18th - book now👇unlockingthesevern.co.uk/cal…
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Jonathan Bolland retweeted
15 Mar 2021
new paper out today on fishway efficiency. What makes a fishway efficient? More importantly, can we all agree on the best methods to answer that question? #fishsci #fishways #fishpassage onlinelibrary.wiley.com/doi/…
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