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2022

Aug 25th

Remote referee 2021 ERC STg call

Jul 18th

New paper out in eLife about predation risk in schooling prey

May 24th

New paper out in Current Biology

May 20th

New paper out in Integrative & Comparative Biology

May 10th

Reached 1000 citations milestone

Apr 25th

Short-listed for 2021 Robert May Prize

2021

Dec 23rd

Created custom Google Scholar widget

Dec 15th

New preprint out on predation risk in schooling prey

Nov 15th

New grant submitted

Nov 11th

New paper out in Frontiers in Physiology

Oct 2nd

Paper submitted on jackdaw collective behaviour

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jollethebiologist

@jollethebiologist

After a very dry summer, rains have started to fill up part of the rivers we are studying. In some cases this has led refuge pools to connect with previously dried-up sections of river, as has happened in the Riera de Escales in the photo, a very dry stream in the Garrotxa. Interestingly enough, a day or so after the rain the pools have disconnected again, and we found fish in the newly created pools, meaning they must have come from the bigger original pool. How they got there, e.g. passive by strong flow of the rain or by actively swimming, is something to be determined, but interestingly it only seems to be fish of certain size-classes. These fish may be safe for now in their new pool, but if it does not rain enough in the coming weeks, the pool may still dry up and the fish will die
#drought #freshwater #freshwaterecology #riuscatalans #sequera #aigua

jollethebiologist

•

After a very dry summer, rains have started to fill up part of the rivers we are studying. In some cases this has led refuge pools to connect with previously dried-up sections of river, as has happened in the Riera de Escales in the photo, a very dry stream in the Garrotxa. Interestingly enough, a day or so after the rain the pools have disconnected again, and we found fish in the newly created pools, meaning they must have come from the bigger original pool. How they got there, e.g. passive by strong flow of the rain or by actively swimming, is something to be determined, but interestingly it only seems to be fish of certain size-classes. These fish may be safe for now in their new pool, but if it does not rain enough in the coming weeks, the pool may still dry up and the fish will die #drought #freshwater #freshwaterecology #riuscatalans #sequera #aigua

4 weeks ago

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1/9

In the field with my amazing field technician @galdric98, exploring our study streams after the rain and documenting how some fish may manage to escape the refuge pools that enabled them to survive the dry summer months

jollethebiologist

•

In the field with my amazing field technician @galdric98, exploring our study streams after the rain and documenting how some fish may manage to escape the refuge pools that enabled them to survive the dry summer months

4 weeks ago

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2/9

Something different to share today! The PhD defence of Apu Ramesh at the RUG in Groningen, where I was one of the members of the PhD examination committee and it was my role to ask detailed questions about her thesis. Apu did a wonderful job and successfully defended her thesis "animal personalities on the move" about the movement strategies of migrating and resident sticklebacks. It was a shame to miss some of the official procedures and customs that we have in the Netherlands as I could not attend in person, but great to be able to still do it (dressed-up) from the lab abroad!
#phddefense #rijksuniversiteitgroningen #gelifes #science #sciencedegree

jollethebiologist

•

Something different to share today! The PhD defence of Apu Ramesh at the RUG in Groningen, where I was one of the members of the PhD examination committee and it was my role to ask detailed questions about her thesis. Apu did a wonderful job and successfully defended her thesis "animal personalities on the move" about the movement strategies of migrating and resident sticklebacks. It was a shame to miss some of the official procedures and customs that we have in the Netherlands as I could not attend in person, but great to be able to still do it (dressed-up) from the lab abroad! #phddefense #rijksuniversiteitgroningen #gelifes #science #sciencedegree

1 month ago

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3/9

There is large temperature variation in the refuge pools we are sampling, with many actually keeping a moderate temperature due to sufficient cover, but others heating up to well over 30C. This large pool ranged between 29C and 33C, which, so far, the Mediterranean barbel still seem to be able to withstand
#freshwaterecology #freshwaterstream #environmentalchange #fieldbiology #fieldresearch #riversampling #lagarrotxa #riuscatalans

jollethebiologist

•

There is large temperature variation in the refuge pools we are sampling, with many actually keeping a moderate temperature due to sufficient cover, but others heating up to well over 30C. This large pool ranged between 29C and 33C, which, so far, the Mediterranean barbel still seem to be able to withstand #freshwaterecology #freshwaterstream #environmentalchange #fieldbiology #fieldresearch #riversampling #lagarrotxa #riuscatalans

2 months ago

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4/9

Just had a fantastic week in Stockholm, attending and presenting at #ISBE2022, the bi-annual conference of the International Society for Behavioural Ecology. So great to see and chat with so many colleagues from around the world and see a week full of highly diverse and inspiring talks at such a great location!
#scienceconference #ecology #behavioralecology #sciencetalk

jollethebiologist

•

Just had a fantastic week in Stockholm, attending and presenting at #ISBE2022, the bi-annual conference of the International Society for Behavioural Ecology. So great to see and chat with so many colleagues from around the world and see a week full of highly diverse and inspiring talks at such a great location! #scienceconference #ecology #behavioralecology #sciencetalk

2 months ago

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5/9

Besides fish, frogs, and snakes, we also occasionally find turtles in our refuge pools! Including this native species, the Tortuga de rierol (Mauremys leprosa)
#turtle #tortoise #tortuga #tortugarierol #herpetologia #catalunya_natura

jollethebiologist

•

Besides fish, frogs, and snakes, we also occasionally find turtles in our refuge pools! Including this native species, the Tortuga de rierol (Mauremys leprosa) #turtle #tortoise #tortuga #tortugarierol #herpetologia #catalunya_natura

2 months ago

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6/9

An intermittent stream in the pyrenean foothills in the midst of the dry season with only some small pools with increasingly warm water on the blank bedrock remaining.. Photo by @galdric98, Riera d'Escales, Garrotxa
#drystream #garrotxa #riusdecatalunya #intermittentstream

jollethebiologist

•

An intermittent stream in the pyrenean foothills in the midst of the dry season with only some small pools with increasingly warm water on the blank bedrock remaining.. Photo by @galdric98, Riera d'Escales, Garrotxa #drystream #garrotxa #riusdecatalunya #intermittentstream

2 months ago

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7/9

Aquatic snakes are one of the main predators of fish of the freshwater habitats in the region. In intermittent streams refuge pools may offer a safe haven from droughts but are an ideal location for snakes and other predators to come for a snack. Indeed, almost every day out in the field we saw at least one snake and often multiple individuals looking out for an easy meal. Here you can see the Iberian Grass Snake (Natrix astreptophora), curiously coming towards me while a school of Mediterranean Barbel hurries past. It is larger (up to 125cm) and less common than the Viperine water Snake (Natrix maura), and tends to be less aquatic, so I was really happy to see this individual swimming from up close!
#watersnake #natrix #natrixastreptophora #natrixnatrix #herpetologia #swimmingsnake #grasssnake #altagarrotxa #catalunya_natura #reservafluvial

jollethebiologist

•

Aquatic snakes are one of the main predators of fish of the freshwater habitats in the region. In intermittent streams refuge pools may offer a safe haven from droughts but are an ideal location for snakes and other predators to come for a snack. Indeed, almost every day out in the field we saw at least one snake and often multiple individuals looking out for an easy meal. Here you can see the Iberian Grass Snake (Natrix astreptophora), curiously coming towards me while a school of Mediterranean Barbel hurries past. It is larger (up to 125cm) and less common than the Viperine water Snake (Natrix maura), and tends to be less aquatic, so I was really happy to see this individual swimming from up close! #watersnake #natrix #natrixastreptophora #natrixnatrix #herpetologia #swimmingsnake #grasssnake #altagarrotxa #catalunya_natura #reservafluvial

3 months ago

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8/9

My field technician @galdric98 exploring the Llierca river to document the distribution of fish and location of refuge pools. Here are some of the deepest parts of the river. That is, when there is water. Now it is almost completely dry already and it feels more like walking on the moon #dryriverbed #rivergorge #sadernes #fieldwork #freshwaterfish #freshwaterecology #natgeoexplore #moonwalk

jollethebiologist

•

My field technician @galdric98 exploring the Llierca river to document the distribution of fish and location of refuge pools. Here are some of the deepest parts of the river. That is, when there is water. Now it is almost completely dry already and it feels more like walking on the moon #dryriverbed #rivergorge #sadernes #fieldwork #freshwaterfish #freshwaterecology #natgeoexplore #moonwalk

3 months ago

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9/9

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Jolle JollesFollow

Behavioural biologist | PhD | @insidenatgeo explorer. I study how animals live and move together and cope with environmental change 🐟🦎🐦

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Projecte 4 Estacions ☀️@P4Estacions·

25 Sep

Les primeres neus ja són aquí! 😍❄ https://twitter.com/MeteoElpito/status/1573915017984069637

Jolle Jolles @JolleWJolles·

24 Sep

Super excited about the large amount of abstracts that we received to present at the ASAB Winter meeting this December on #animalmovement! It is going to be an awesome meeting

Youtube

While snorkelling in the Bodensee, I found a large number of pikes stalking juvenile fish in the reeds along the shores. The pikes here can easily get 1m and are actually quite easy to approach to within 2m when quiet. Beautiful to see these hunters up close in the wild.

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