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Jakub Žák

@fishjakub.bsky.social
90 followers 121 following 20 posts

Fish ecologist; Asistant profesor at Masaryk University, Czechia

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Reposted by Jakub Žák
Retraction Watch @retractionwatch.com · 01/08/2026
A lawsuit filed under the U.S. False Claims Act accuses Elsevier, Springer Nature, Wiley and Informa of perpetrating a decade-long scheme to defraud the government by charging exorbitant article processing charges.
retractionwatch.com
Federal lawsuit accuses four major publishers of extorting article processing charges
iStock A lawsuit filed under the U.S. False Claims Act accuses four major publishers of perpetrating a decade-long scheme to defraud the government by charging exorbitant article processing charges…
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Reposted by Jakub Žák
Nature @nature.com · 25/07/2026
Researchers have discovered a contagious cancer in catfish – just the fourth example of tumour cells that spread naturally from one animal to another go.nature.com/4buKZ43
go.nature.com
Rare contagious cancer discovered in wild catfish
Nature - Transmissible tumours have been found in only a few types of animal, but there might be many more out there.
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Jakub Žák @fishjakub.bsky.social · 17/04/2026
Humbled to receive a Special Award from Živa Magazine for 2025! It was inspiring to connect with scientists so dedicated to comunicating their exciting fields. Živa has been popularizing biology since 1853—predating even Nature and Science. Truly an honor to be part of this legacy.🌿 #ZivaMagazine
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Reposted by Jakub Žák
Department of Botany and Zoology, Masaryk Uni @botzool.bsky.social · 30/03/2026
Sexual selection and reproductive success in mesocosm populations of African annual killifish doi.org/10.1111/jfb.... @fishjakub.bsky.social
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Jakub Žák @fishjakub.bsky.social · 15/02/2026
Interesting reading - Bluesky becomes scientists favourite platform over X, due to lack of hatespeach, conspiracy theories and pseudoscience, a survey among 800 scientists show doi.org/10.1093/icb/...
doi.org
Scientists no Longer Find Twitter Professionally Useful, and have Switched to Bluesky
Synopsis. Social media has become widely used by the scientific community for a variety of professional uses, including networking and public outreach. For
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Reposted by Jakub Žák
Oleksandr Maistrenko @omaistrenko.bsky.social · 09/02/2026
I invite you to check our paper entitled “Rebuilding Ukraine’s capacity for fundamental research in evolutionary biology” doi.org/10.1038/s415... in @natecoevo.nature.com about the Ukrainian School in Evolutionary Biology #USEB we organized in 2025. #biology #evolution #school #science #Ukraine
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Reposted by Jakub Žák
Royal Society Publishing @royalsocietypublishing.org · 08/01/2026
Desert lizards consumed and retained more carbon before hibernation and more nitrogen during breeding season, surprisingly by including insects to their otherwise plant-based diet. Read 'Desert lizards modulate nutritional responses to match seasonal biological needs': doi.org/10.1098/rsos... #RSOS
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Reposted by Jakub Žák
The FSBI @thefsbi.bsky.social · 19/12/2025
#JFB: Cold storage of alarm substance reduces the behavioural stress response of zebrafish (Danio rerio) doi.org/10.1111/jfb.70200 #FishSci
doi.org
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Jakub Žák @fishjakub.bsky.social · 17/12/2025
New paper! We challenge the universality of dietary restriction for lifespan extension! It works for inbred but not for genetically diverse populations. In outbred Nothobranchius furzeri, neither protein nor caloric restriction delayed actuarial senescence #AgingResearch
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Jakub Žák @fishjakub.bsky.social · 27/11/2025
Amazing talk by Jason Podrabsky (@OregonStateU) as part of the Life Sciences Seminars at MU, on the incredible stress tolerance of annual killifish (Austrofundulus limnaeus) embryos! These tiny survivors endure extreme conditions that would kill most other life forms
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Reposted by Jakub Žák
Nature @nature.com · 15/11/2025
Computer scientist Yoshua Bengio has become the first person to have their work cited more than one million times on the search engine Google Scholar go.nature.com/4i1L2Gq
go.nature.com
‘Godfather of AI’ becomes first person to hit one million citations
Nature - The milestone makes machine-learning trailblazer Yoshua Bengio the most cited researcher on Google Scholar.
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Jakub Žák @fishjakub.bsky.social · 10/11/2025
Přirozený výtěr tolstolobika v Dunaji! Znáte ty obrázky z USA, kde kolem člunu létají desetikilové ryby? Tak už i na Slovensku. Je ho v Dunaji tolik, že Slovenský rybářský svaz spouští redukci. Více od 57. sek: www.stvr.sk/televizia/ar... #tolstolobik #Dunaj #invaznidruhy
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Jakub Žák @fishjakub.bsky.social · 02/11/2025
Must read! Nice examples why basic science is important and how we all benefit from it www.nature.com/articles/d41...
nature.com
7 basic science discoveries that changed the world
Ozempic, MRI machines and flat screen televisions all emerged out of fundamental research decades earlier — the very types of study being slashed by the US government.
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Reposted by Jakub Žák
Department of Botany and Zoology, Masaryk Uni @botzool.bsky.social · 30/10/2025
Symposium on Fish Mating Systems (Czechia, 21-23 Jan 2026): REGISTRATION NOW OPEN at fish.ivb.cz/registration/ Plenary talks by Suzanne Alonzo, John Fitzpatrick, and Chiara Benvenuto. @ivb-cas.bsky.social
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Jakub Žák @fishjakub.bsky.social · 28/10/2025
Husbandry of N. furzeri, the shortest-lived vertebrate used for biogerontology, is dependent on bloodworms. When our protocol is followed, you can feed N. furzeri an open-formula purified diet — paving the way for more consistent and reproducible lab studies. #killifish @thefsbi.bsky.social
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Jakub Žák @fishjakub.bsky.social · 25/10/2025
Vysokohorské ryby v Evropě? Kde? Proč? a Jak se tam dostaly? Více v odpovědi pro Zeptej se vědce shorturl.at/0RrVO
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Jakub Žák @fishjakub.bsky.social · 15/10/2025
Jedna z našich nejvzácnějších a nejkrásnějších rybek, sekavčík balkánský. Byl znám pouze z jedné říčky při hranicích se Slovenskem. V r. 2016 byla nalezena velká populace v řece Jihlavě. To jen podtrhuje důležitost ichtyologických monitoringů
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Jakub Žák @fishjakub.bsky.social · 04/10/2025
What determines mitochondrial number in Ethiopian Rodents from two Mountain regions? Species? Tissue? Elevation? @botzool.bsky.social @ivb-cas.bsky.social doi.org/10.25225/jvb...
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Reposted by Jakub Žák
George Takei @georgetakei.bsky.social · 11/01/2025
I fear there is deep truth here.
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Jakub Žák @fishjakub.bsky.social · 12/08/2025
An interesting reading. Dietary restriction is intensively using mice as a model. Wheatley et al suggest that mouse physiology may considerably confound the real effects of dietary restriction, meaning that mice may not be the ideal model for studying DR link.springer.com/article/10.1...
link.springer.com
The cold truth: torpor as a confound in studies of caloric restriction - Journal of Comparative Physiology B
Calorie restriction has been shown to dramatically extend lifespan in a range of species. Beyond longevity, calorie restriction is also reported to improve cognitive function, ameliorate neurodegenera...
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Jakub Žák @fishjakub.bsky.social · 11/06/2025
We published a visual guide to the repertoire of hepatocyte alterations recognized in Nothobranchius furzeri, a vertebrate model in aging research. Giant mitochondria and intense hepatocellular vacuolation are the most prominent features. #killifish
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Reposted by Jakub Žák
Reichard Lab @fishecoevo.bsky.social · 08/06/2025
Interested in Fish Mating Systems? Join us for a small symposium in Brno, Czechia, from 21 to 23 January 2026! The invited speakers are Suzanne Alonzo, John Fitzpatrick, and Suzanna Pla. More information at fish.ivb.cz
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Jakub Žák @fishjakub.bsky.social · 09/06/2025
Zpět z Německa, kde se konala konference o halančíkovi a jeho využití jako modelového organismu. Unikátní možnost podělit se o výsledky studia potravní preference halančíků
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Jakub Žák @fishjakub.bsky.social · 28/04/2025
Je chov halančíků standardizován? Jaké jsou mezery? To vše v závěrečném dílu o laboratorních halančících nyní v Živě.
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Jakub Žák @fishjakub.bsky.social · 09/04/2025
Od ledna má Ústav botaniky a zoologie MU nového ředitele. shorturl.at/aa7Ua
shorturl.at
Úspěchy našich kolegyň a kolegů | Přírodovědecká fakulta MUNI
Přírodovědecká fakulta Masarykovy univerzity je jednou z deseti fakult Masarykovy univerzity. Zároveň je též jednou ze čtyř nejstarších fakult, jež vznikly při založení Masarykovy univerzity v roce 19...
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Reposted by Jakub Žák
Royal Society Publishing @royalsocietypublishing.org · 25/03/2025
Happy 20th anniversary to #BiologyLetters! Take a look at our timeline of key milestones for the journal over the past 20 years. royalsocietypublishing.org/pb-assets/BL...
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Reposted by Jakub Žák
Proceedings of the National Academy of Sciences @pnas.org · 04/03/2025
Larger species have a higher cancer prevalence than smaller species, according to a study that refutes Peto’s Paradox, the claim that that species’ body size is not correlated with cancer risk. In PNAS: www.pnas.org/doi/10.1073/...
The analysis found that Elephas maximus, the Asian elephant, has a lower than excepted prevalence of malignancy, but found no evidence to suggest that it has an exceptionally low prevalence of malignancy despite often being touted as the quintessential example of Peto’s paradox.
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Jakub Žák @fishjakub.bsky.social · 23/02/2025
Aha, tak oni jsou statisicove odmeny nekolikrat do roka asi standard, kdyz jste rektor.
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Reposted by Jakub Žák
FishEvo Zuzana Musilova @fishevo.bsky.social · 19/02/2025
Loving deep-sea fish and molecular evolution? We're hiring!:-) Looking for a motivated PhD student to join us to study evolution of vision & to explore limits of vertebrate eye in extreme environment. Deadline 15th March. Thanks for applying and sharing! more info: www.fishevo.com/erc-funded-p...
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Jakub Žák @fishjakub.bsky.social · 15/02/2025
Vedení univerzity je jistě nelehká věc a zaslouží adekvátní ohodnocení. Ale nevím, jak často si “řadový” akademik přijde na odměny v řádu vícenásobků jeho mzdy. Ale je třeba prijem nasobit, když je 175 tis kč/měs?
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