Jakub Žák

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

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

#JFB: Cold storage of alarm substance reduces the behavioural stress response of zebrafish (Danio rerio) doi.org/10.1111/jfb.70200 #FishSci

Neither caloric nor protein restriction increases the male lifespan of outbred short-lived fish Abstract. Laboratory inbred strains respond strongly to dietary restriction (DR), whereas genetically diverse populations may not experience comparable ben

Accepted paper is here
doi.org/10.1093/gero...

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

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

‘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.

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

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

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.

Must read! Nice examples why basic science is important and how we all benefit from it

www.nature.com/articles/d41...

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

An open-access article can be found here
doi.org/10.1111/jfb....

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

Vysokohorské ryby v Evropě? Kde? Proč? a Jak se tam dostaly? Více v odpovědi pro Zeptej se vědce
shorturl.at/0RrVO

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

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...

I fear there is deep truth here.

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...

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...

Ultrastructural alterations of hepatocytes in short-lived model fish, Nothobranchius furzeri Jubb, 1971 The hepatocytes from 40 Nothobranchius furzeri, a promising model in biogerontology, were subjected to ultrastructural examination to provide a visual guide to the repertoire of hepatocyte alterati...

full text is here
www.tandfonline.com/doi/full/10....

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

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

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

Je chov halančíků standardizován? Jaké jsou mezery? To vše v závěrečném dílu o laboratorních halančících nyní v Živě.

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...

Od ledna má Ústav botaniky a zoologie MU nového ředitele.
shorturl.at/aa7Ua

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...

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.

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/...

Aha, tak oni jsou statisicove odmeny nekolikrat do roka asi standard, kdyz jste rektor.

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...

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?