Jolle Jolles

Behavioral Biologist, PhD, National Geographic Explorer

Menum

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Latest news

2022

May 24th

New paper out in Current Biology

May 10th

Reached 1000 citations milestone

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

See all news...

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jollethebiologist

@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

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

1 week ago

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1/9

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

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

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

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 weeks ago

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2/9

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 weeks ago

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3/9

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 weeks ago

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4/9

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

4 weeks ago

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5/9

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

1 month ago

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6/9

Researching the effects of droughts on freshwater fish populations is not always easy...

jollethebiologist

•

Researching the effects of droughts on freshwater fish populations is not always easy...

1 month ago

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7/9

In intermittent streams, not all fish are lucky enough to survive the dry season. Even those that make it to refuge pools may struggle to survive the harsh conditions, and many pools eventually do dry up.. Here you can see a tiny pool in the Borró river in nort-east Catalunya, with plenty of fish but many of them dying in front of our eyes. Research supported by @insidenatgeo and @creaf_ecologia. Photos by @galdric98
#riversofinstagram #drought #dryriverbed #ecology #deadfish #chub #garrotxa #riusdecatalunya #freshwaterfish #fieldresearch

In intermittent streams, not all fish are lucky enough to survive the dry season. Even those that make it to refuge pools may struggle to survive the harsh conditions, and many pools eventually do dry up.. Here you can see a tiny pool in the Borró river in nort-east Catalunya, with plenty of fish but many of them dying in front of our eyes. Research supported by @insidenatgeo and @creaf_ecologia. Photos by @galdric98
#riversofinstagram #drought #dryriverbed #ecology #deadfish #chub #garrotxa #riusdecatalunya #freshwaterfish #fieldresearch

In intermittent streams, not all fish are lucky enough to survive the dry season. Even those that make it to refuge pools may struggle to survive the harsh conditions, and many pools eventually do dry up.. Here you can see a tiny pool in the Borró river in nort-east Catalunya, with plenty of fish but many of them dying in front of our eyes. Research supported by @insidenatgeo and @creaf_ecologia. Photos by @galdric98
#riversofinstagram #drought #dryriverbed #ecology #deadfish #chub #garrotxa #riusdecatalunya #freshwaterfish #fieldresearch

In intermittent streams, not all fish are lucky enough to survive the dry season. Even those that make it to refuge pools may struggle to survive the harsh conditions, and many pools eventually do dry up.. Here you can see a tiny pool in the Borró river in nort-east Catalunya, with plenty of fish but many of them dying in front of our eyes. Research supported by @insidenatgeo and @creaf_ecologia. Photos by @galdric98
#riversofinstagram #drought #dryriverbed #ecology #deadfish #chub #garrotxa #riusdecatalunya #freshwaterfish #fieldresearch

jollethebiologist

•

In intermittent streams, not all fish are lucky enough to survive the dry season. Even those that make it to refuge pools may struggle to survive the harsh conditions, and many pools eventually do dry up.. Here you can see a tiny pool in the Borró river in nort-east Catalunya, with plenty of fish but many of them dying in front of our eyes. Research supported by @insidenatgeo and @creaf_ecologia. Photos by @galdric98 #riversofinstagram #drought #dryriverbed #ecology #deadfish #chub #garrotxa #riusdecatalunya #freshwaterfish #fieldresearch

1 month ago

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8/9

A couple of weeks ago I visited the primary school #escolaboragran in Serinya, Girona, to give a biology class to the children of 3r (~8y). I was actually a bit nervous as it was my first talk completely in Catalan, but I believe the children understood everything I said 😅 Besides talking about the natural world around us, and the importance of protecting it, I thought it was nice to explain them about how it is to be a biologist and scientist, and what it is I actually do every day. It was really great interacting with the kids and getting lots of interesting questions. But I was even more happily surprised to suddenly receive a massive notebook with beautiful drawings and explanations of the students about everything I talked about! Hope to soon bring the class with me to the lab and the field.
Fa unes setmanes vaig visitar l'escola primària de Serinya, Girona, per donar una classe de biologia als nens de 3r (~8y). De fet, estava una mica nerviós ja que era la meva primera xerrada així completament en català, però crec que els nens ho van entendre tot 😅 A més de parlar del món natural i de la importància de protegir-lo, he pensat seria bé explicar-los com és ser biòleg i un científic, i el què faig cada dia. Va ser fantàstic interactuar amb els nens i rebre moltes preguntes interessants. Però em va sorprendre encara més de rebre de sobte una llibreta massiva amb dibuixos preciosos i explicacions dels alumnes sobre tot el que vaig parlar! Espero portar aviat la classe amb mi al laboratori i al camp.
#biologyclass #scienceoutreach #primaryschool #publicengagement #schooltalk #stickleback

A couple of weeks ago I visited the primary school #escolaboragran in Serinya, Girona, to give a biology class to the children of 3r (~8y). I was actually a bit nervous as it was my first talk completely in Catalan, but I believe the children understood everything I said 😅 Besides talking about the natural world around us, and the importance of protecting it, I thought it was nice to explain them about how it is to be a biologist and scientist, and what it is I actually do every day. It was really great interacting with the kids and getting lots of interesting questions. But I was even more happily surprised to suddenly receive a massive notebook with beautiful drawings and explanations of the students about everything I talked about! Hope to soon bring the class with me to the lab and the field.
Fa unes setmanes vaig visitar l'escola primària de Serinya, Girona, per donar una classe de biologia als nens de 3r (~8y). De fet, estava una mica nerviós ja que era la meva primera xerrada així completament en català, però crec que els nens ho van entendre tot 😅 A més de parlar del món natural i de la importància de protegir-lo, he pensat seria bé explicar-los com és ser biòleg i un científic, i el què faig cada dia. Va ser fantàstic interactuar amb els nens i rebre moltes preguntes interessants. Però em va sorprendre encara més de rebre de sobte una llibreta massiva amb dibuixos preciosos i explicacions dels alumnes sobre tot el que vaig parlar! Espero portar aviat la classe amb mi al laboratori i al camp.
#biologyclass #scienceoutreach #primaryschool #publicengagement #schooltalk #stickleback

A couple of weeks ago I visited the primary school #escolaboragran in Serinya, Girona, to give a biology class to the children of 3r (~8y). I was actually a bit nervous as it was my first talk completely in Catalan, but I believe the children understood everything I said 😅 Besides talking about the natural world around us, and the importance of protecting it, I thought it was nice to explain them about how it is to be a biologist and scientist, and what it is I actually do every day. It was really great interacting with the kids and getting lots of interesting questions. But I was even more happily surprised to suddenly receive a massive notebook with beautiful drawings and explanations of the students about everything I talked about! Hope to soon bring the class with me to the lab and the field.
Fa unes setmanes vaig visitar l'escola primària de Serinya, Girona, per donar una classe de biologia als nens de 3r (~8y). De fet, estava una mica nerviós ja que era la meva primera xerrada així completament en català, però crec que els nens ho van entendre tot 😅 A més de parlar del món natural i de la importància de protegir-lo, he pensat seria bé explicar-los com és ser biòleg i un científic, i el què faig cada dia. Va ser fantàstic interactuar amb els nens i rebre moltes preguntes interessants. Però em va sorprendre encara més de rebre de sobte una llibreta massiva amb dibuixos preciosos i explicacions dels alumnes sobre tot el que vaig parlar! Espero portar aviat la classe amb mi al laboratori i al camp.
#biologyclass #scienceoutreach #primaryschool #publicengagement #schooltalk #stickleback

A couple of weeks ago I visited the primary school #escolaboragran in Serinya, Girona, to give a biology class to the children of 3r (~8y). I was actually a bit nervous as it was my first talk completely in Catalan, but I believe the children understood everything I said 😅 Besides talking about the natural world around us, and the importance of protecting it, I thought it was nice to explain them about how it is to be a biologist and scientist, and what it is I actually do every day. It was really great interacting with the kids and getting lots of interesting questions. But I was even more happily surprised to suddenly receive a massive notebook with beautiful drawings and explanations of the students about everything I talked about! Hope to soon bring the class with me to the lab and the field.
Fa unes setmanes vaig visitar l'escola primària de Serinya, Girona, per donar una classe de biologia als nens de 3r (~8y). De fet, estava una mica nerviós ja que era la meva primera xerrada així completament en català, però crec que els nens ho van entendre tot 😅 A més de parlar del món natural i de la importància de protegir-lo, he pensat seria bé explicar-los com és ser biòleg i un científic, i el què faig cada dia. Va ser fantàstic interactuar amb els nens i rebre moltes preguntes interessants. Però em va sorprendre encara més de rebre de sobte una llibreta massiva amb dibuixos preciosos i explicacions dels alumnes sobre tot el que vaig parlar! Espero portar aviat la classe amb mi al laboratori i al camp.
#biologyclass #scienceoutreach #primaryschool #publicengagement #schooltalk #stickleback

A couple of weeks ago I visited the primary school #escolaboragran in Serinya, Girona, to give a biology class to the children of 3r (~8y). I was actually a bit nervous as it was my first talk completely in Catalan, but I believe the children understood everything I said 😅 Besides talking about the natural world around us, and the importance of protecting it, I thought it was nice to explain them about how it is to be a biologist and scientist, and what it is I actually do every day. It was really great interacting with the kids and getting lots of interesting questions. But I was even more happily surprised to suddenly receive a massive notebook with beautiful drawings and explanations of the students about everything I talked about! Hope to soon bring the class with me to the lab and the field.
Fa unes setmanes vaig visitar l'escola primària de Serinya, Girona, per donar una classe de biologia als nens de 3r (~8y). De fet, estava una mica nerviós ja que era la meva primera xerrada així completament en català, però crec que els nens ho van entendre tot 😅 A més de parlar del món natural i de la importància de protegir-lo, he pensat seria bé explicar-los com és ser biòleg i un científic, i el què faig cada dia. Va ser fantàstic interactuar amb els nens i rebre moltes preguntes interessants. Però em va sorprendre encara més de rebre de sobte una llibreta massiva amb dibuixos preciosos i explicacions dels alumnes sobre tot el que vaig parlar! Espero portar aviat la classe amb mi al laboratori i al camp.
#biologyclass #scienceoutreach #primaryschool #publicengagement #schooltalk #stickleback

A couple of weeks ago I visited the primary school #escolaboragran in Serinya, Girona, to give a biology class to the children of 3r (~8y). I was actually a bit nervous as it was my first talk completely in Catalan, but I believe the children understood everything I said 😅 Besides talking about the natural world around us, and the importance of protecting it, I thought it was nice to explain them about how it is to be a biologist and scientist, and what it is I actually do every day. It was really great interacting with the kids and getting lots of interesting questions. But I was even more happily surprised to suddenly receive a massive notebook with beautiful drawings and explanations of the students about everything I talked about! Hope to soon bring the class with me to the lab and the field.
Fa unes setmanes vaig visitar l'escola primària de Serinya, Girona, per donar una classe de biologia als nens de 3r (~8y). De fet, estava una mica nerviós ja que era la meva primera xerrada així completament en català, però crec que els nens ho van entendre tot 😅 A més de parlar del món natural i de la importància de protegir-lo, he pensat seria bé explicar-los com és ser biòleg i un científic, i el què faig cada dia. Va ser fantàstic interactuar amb els nens i rebre moltes preguntes interessants. Però em va sorprendre encara més de rebre de sobte una llibreta massiva amb dibuixos preciosos i explicacions dels alumnes sobre tot el que vaig parlar! Espero portar aviat la classe amb mi al laboratori i al camp.
#biologyclass #scienceoutreach #primaryschool #publicengagement #schooltalk #stickleback

jollethebiologist

•

A couple of weeks ago I visited the primary school #escolaboragran in Serinya, Girona, to give a biology class to the children of 3r (~8y). I was actually a bit nervous as it was my first talk completely in Catalan, but I believe the children understood everything I said 😅 Besides talking about the natural world around us, and the importance of protecting it, I thought it was nice to explain them about how it is to be a biologist and scientist, and what it is I actually do every day. It was really great interacting with the kids and getting lots of interesting questions. But I was even more happily surprised to suddenly receive a massive notebook with beautiful drawings and explanations of the students about everything I talked about! Hope to soon bring the class with me to the lab and the field. Fa unes setmanes vaig visitar l'escola primària de Serinya, Girona, per donar una classe de biologia als nens de 3r (~8y). De fet, estava una mica nerviós ja que era la meva primera xerrada així completament en català, però crec que els nens ho van entendre tot 😅 A més de parlar del món natural i de la importància de protegir-lo, he pensat seria bé explicar-los com és ser biòleg i un científic, i el què faig cada dia. Va ser fantàstic interactuar amb els nens i rebre moltes preguntes interessants. Però em va sorprendre encara més de rebre de sobte una llibreta massiva amb dibuixos preciosos i explicacions dels alumnes sobre tot el que vaig parlar! Espero portar aviat la classe amb mi al laboratori i al camp. #biologyclass #scienceoutreach #primaryschool #publicengagement #schooltalk #stickleback

2 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 🐟🦎🐦

Jolle Jolles @JolleWJolles·

Es cert!!

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Dr Andrew Digby @takapodigs·

Not everything since 2016 has been bad: the #kakapo population has grown by 100% since then! 252 are alive today. #kakapo2022 #conservation Pic: Deidre Vercoe

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Dont Show Your Cat @DontShowYourCat·

the inner monologue

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New video

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.

See all videos about our work...

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