#danio rerio

[chuchu666yay]

#zebrafish #danio rerio #biology #scientific research #featuring my ugly diagram #my fish heart is beating too fast #because my dechorionation was too rough #sorry #also i wrote my report in comic sans and i got scolded :(

[vestal-spirit]

28 Zoan

#mermay 2022 #mermay #mermaid #Danio glofish #Danio rerio

[goldenbrowndragon]

Two weeks ago, I had the opportunity to rescue nine zebrafish (danio rerio). They were used in behaviour experiments in a biology lab, and were retired. They were put in a tank with obstacles, and researchers were studying how the obstacles impacted their behaviour as a group (zebrafish is a schooling fish). Retirement for them meaning either being adopted, or put down.

So.. I had no choice but to bring them home :D !

I did not have the time to properly cycle the tank, unfortunately (I had no idea I was going to have fish anytime soon !) but I did my best to provide them a comfortable tank.

I found a 71L tank, an air pump, soil and plants, and more recently, I added wood, a kind of aquatic moss and some aquatic grass.

I feed them fish pellets (given by the biology lab), and also live mosquito larvae. I also got frozen artemia, for when I run out of mosquito larvae.

Last Sunday, I went home at 2AM and caught them sleeping :3

They were so cute, floating gently without moving much. And then suddenly they started moving at their usual speed ! I had woken them up ':3

At first they were all stressed out, they had never seen an air pump, nor probably plants either, but in a day or two they were playing with the air bubbles : swimming into the bubble stream, letting it bring them all the way up to the surface, then swimming back down and repeat. I love them so much !

First image is the tank they were in when i got them. I moved them to the much larger tank you see in the following pictures. The last two pictures show their current tank. I can't wait for the plants to grow !! Sorry for the white reflection blocking the view on these, I had put a plate by the tank for when I was adding the plants.

I'm also using the tank to propagate a monstera stem I found in a train station a while ago ^^ It's the bunch of roots on the right of the third picture.

They change colours between pale brown (when they are stressed) and light grey with dark blueish stripes (when they are not stressed). I'm seeing one of them light brown at all times, but I don't know whether it's always the same one or not... I hope it's a different one each time 😢

They are starting to learn that big scary thing hovering above the surface means food is falling from the sky <3

#zebrafish #danio rerio #rescue

[cilginfizikcilervbi]

Empatinin Kökeni Çok Daha Eskilere Dayanıyor

Empatinin Kökeni Çok Daha Eskilere Dayanıyor İnsanlara kendilerini başkalarının yerine koyma önemli bir yer tutar. Empati, her şeyden önce iş birliği ve toplumcu bir davranış sergilemenin temelidir. Özellikle primatlar, filler ve yunuslar gibi sosyal memelilerde karmaşık bir empati biçimi vardır. Fakat diğer canlıların da empati yetisine sahip olduğu artık biliniyor. Empatinin en basit versiyonu…

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#Çok Daha Eskilere Dayanıyor #Danio #Danio rerio #Empatinin Kökeni #Empatinin Kökeni Çok Daha Eskilere Dayanıyor #oksitosin #rerio #zebra balığı

[aquariumfacile]

Comment bien maintenir le Danio Rerio (poisson) ?

Découvrez comment prendre soin de votre poisson Danio Rerio comme un pro ! 🐟 Tous les conseils et astuces pour une maintenance réussie de ces petits compagnons aquatiques. Vous ne voulez pas manquer ça ! 🌊

Le danio rerio, communément appelé poisson zèbre, est un petit poisson originaire d’Asie et plus particulièrement d’Inde, où il peuple principalement les cours d’eau et les étangs peu profonds. Ce poisson est réputé pour sa beauté saisissante avec ses couleurs vives et ses motifs distinctifs se rapprochant du zèbre. Sa morphologie fuselée, ses couleurs et sa petite taille en font une espèce…

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#danio rerio poisson #danio zebre #poisson zebre

[hellsitegenetics]

hello, can you please genome this:

"Based"? Are you fucking kidding me? I spent a decent portion of my life writing all of that and your response to me is "Based"? Are you so mentally handicapped that the only word you can comprehend is "Based" - or are you just some fucking asshole who thinks that with such a short response, he can make a statement about how meaningless what was written was? Well, I'll have you know that what I wrote was NOT meaningless, in fact, I even had my written work proof-read by several professors of literature. Don't believe me? I doubt you would, and your response to this will probably be "Based" once again. Do I give a fuck? No, does it look like I give even the slightest fuck about five fucking letters? I bet you took the time to type those five letters too, I bet you sat there and chuckled to yourself for 20 hearty seconds before pressing "send". You're so fucking pathetic. I'm honestly considering directing you to a psychiatrist, but I'm simply far too nice to do something like that. You, however, will go out of your way to make a fool out of someone by responding to a well-thought-out, intelligent, or humorous statement that probably took longer to write than you can last in bed with a chimpanzee. What do I have to say to you? Absolutely nothing. I couldn't be bothered to respond to such a worthless attempt at a response. Do you want "Based" on your gravestone?

String identified: "a"? A cg g ? t a ct t tg a tat a t "a"? A ta aca tat t ca c "a" - a t cg a t tat t c a t , ca a a tatt at ag at a tt a? , ' a tat at t a T ag, act, a tt -a a tat. 't ? t , a t t a "a" c aga. g a c? , t g t gtt c at cg tt? t t t t t t t tt t, t at t a cc t at c g "". ' cg attc. ' t cg ctg t a catt, t ' a t c t tg tat. , , g t a t a a t g t a -tgt-t, tgt, tatt tat a t g t t ta ca at t a ca. at a t a t ? At tg. c't t t t c a t attt at a . at "a" gat?

Closest match: Danio rerio genome assembly, chromosome: 9 Common name: Zebrafish

#tumblr genetics #genetics #asks #requests #sent to me #traaintraacks #fish #ocean #zebrafish

[typhlonectes]

Jolts from electric eels cause fish to absorb free-floating DNA

Zebrafish larvae took up genes for fluorescent proteins and began to glow after swimming with eels.

Think of it as a sort of superhero origin story for zebrafish:  Getting zapped by electric eels can allow them to acquire new DNA—and new abilities—researchers reported yesterday in PeerJ. Scientists working with genetic engineering sometimes use electricity to open temporary holes in cell membranes to allow foreign DNA to enter. To find out whether a version of this phenomenon can happen in nature, the team put electric eels (Electrophorus electricus, pictured) and larvae from zebrafish (Danio rerio) into a tank together, along with free-floating genes that code for a green fluorescent protein. After a day swimming amid the eels’ electric shocks, some larvae started to glow green, New Scientist reports, indicating their cells had taken in and begun to express the foreign genes. The newly acquired DNA degraded quickly—the larvae only glowed for about a week—but it caused scientists to wonder: Could a wild animal acquire genes in this way and pass them to its offspring? Researchers aren’t yet sure, but if so, they say it could introduce new mutations that influence the species’ evolution.

via: https://www.science.org/content/article/jolts-electric-eels-cause-fish-absorb-free-floating-dna

#fish #ichthyology #electric eel #aquatic #genetics #DNA #animals #nature #science

[parasitoidism]

zebra danio naoto appeals to me because his shadow could be one of those "glofish" danios which would be cool + awesome

WAIT THATS SO GENIUS CAUSE THOSE ARE JUST GENETICALLY MODIFIED ZEBRAFISH...literally his shadow. youre me and im you (D. rerio)

#the persona 4 freshwater fish au..............

[para-imperium]

Terraforming Biodiversity

The seedships that arrived at Alpha Centauri had limited space on board for genetic samples, with parahuman and uplift DNA given the highest priority. The unfortunate result being that the vast majority of Old Terra's rich biodiversity died with that planet, leaving Secland and later terraformed worlds an extremely limited gene pool to work with. 

During the terraforming process scientists struggled to fill in the niches left open by a gene bank weighed heavily towards domesticated and laboratory test animals. The possibility of making "downlifted" versions of the uplifted species was proposed but almost universally rejected by the uplifts in question. Instead, the Bureau of Ecosystem Management offered jobs to uplifts filling the ecological roles of their progenitors. This strategy worked surprisingly well, especially with apex predators such as dolphins.

Another approach was to modify the animals they did have using the non-human genes that had been incorporated into parahuman genomes. For instance Secland "bats" are actually heavily modified mice while the procyon is a fox given hand-like paws and a ringed tail.

Late in the terraforming process scientists made a breakthrough that would simplify later efforts. Large complexes of genes that could be activated or deactivated with specific epigenetic triggers were added to the genomes of many species that could produce massive physiological changes in later generations. That way a single breeding colony of ultra-ferrets could give birth to 20-centimeter long mini-ferrets, semi-aquatic ferr-otters, or two-meter mega wolverines as the ecosystem needed.

List of source species:

Mammals:

Cat (Felis catus)

Cattle (Bos taurus)

Dog (Canis lupus familiaris)

Ferret (Mustela furo)

Red fox (Vulpes vulpes)

House mouse (Mus musculus)

European rabbit (Oryctolagus cuniculus)

Sheep (Ovis aries)

Birds:

Budgerigar (Melopsittacus undulatus)

Canary (Serinus canaria)

Chicken (Gallus domesticus)

Rock dove (Columba livia)

Zebra finch (Taeniopygia guttata)

Reptiles:

Green anole (Anolis carolinensis)

Spectacled caiman (Caiman crocodilus)

Fish:

Goldfish (Carassius auratus)

Zebrafish (Danio rerio)

Amphibians:

African clawed frog (Xenopus laevis)

Axolotl (Ambystoma mexicanum)

Bullfrog (Rana catesbeiana)

Tiger salamander (Ambystoma tigrinum)

Arthropods:

Fruit fly (Drosophila melanogaster)

House cricket (Acheta domesticus)

Yellow mealworm beetle (Tenebrio molitor)

#worldbuilding #sci-fi #scifi #sci fi #sciencefiction

[bpod-bpod]

Next Top Model

One member of the minnow family (Cyprinidae) zebrafish (Danio rerio) are often found in research labs across the world. Thanks to their transparent embryos and genetic similarities to humans, these fish offer unique opportunities for researchers to watch how a body is built. But they're only transparent up to a point making later steps in development inaccessible to see. Now a ‘new fish in town’ could be the next top model organism. It’s another type of minnow called Danionella cerebrum that remains transparent until adulthood allowing researchers to use advanced imaging techniques to study development, and even ageing, for longer. Researchers successfully adapted imaging techniques which allowed them to track changes in immune cells (green) and blood vessels (magenta) deep within D.cerebrum’s brain for several days (pictured), resulting in an exciting new tool for researchers to learn more about adult-onset diseases in organs deeper in the body than before.

Written by Sophie Arthur

Video by Pui-Ying Lam

Neuroscience Research Center, Medical College of Wisconsin, Milwaukee, WI, USA

Video originally published with a Creative Commons Attribution 4.0 International (CC BY 4.0)

Published in Disease Models & Mechanisms, December 2022

You can also follow BPoD on Instagram, Twitter and Facebook

#science #biomedicine #model organisms #zebrafish #minnows #immunofluorescence #neuroscience #developmental biology #embryo development

[henrysblake]

#im being converted to arabidopsis ngl #i like c elegans though a classic and an icon

[mixelation]

Another for Sleepover Saturday: rank common lab animals (rats, mice, fruit flies etc)

MODEL ANIMALS RANKED, WORST TO BEST:

5. Mouse (Mus musculus) - Absolutely horrible. People think this is the best one because they're mammals, so they're the closest of the ~classic~ models to humans. To that I say: who fucking cares? Mice take too much work to take care of and they don't make enough babies and they smell. Get out. Worst model organism.

4. Zebrafish (Danio rerio) - Listen. Don't ever work with a vertebrate. These guys are also horrible. They take SO MUCH WORK and care and then doing anything to them is annoying. You know that scene in Finding Nemo where all the fish swim down? They do this. Why do they do this, just get in the net, I'm trying to get you laid. Take longer to get to reproductive age than mice, but they have hundreds of eggs at once, so they win.

3. Clawed frog (Xenopus laevis) - The allure of having hundreds of frog friends is ruined when I remember this is a TRAP and they have all the same problems as ALL VERTEBRATES and that is the the amount of care these suckers need.

2. Fruit flies (Drosophila melanogaster) - Doesn't have a spine, and so no one cares what you do to them. Fantastic. Can just be kept in tubes; no elaborate facilities and dedicated techs necessary. Drawbacks include that they're tiny and they can escape and then haunt the lab.*

1.Roundworm (Caenorhabditis elegans) - Probably the least charismatic animal possible but consider: you can just toss these guys in toxic goo and no one cares. Can be grown in goddamn petri dishes. Super short life cycle. Smaller than a fruit fly, though, so good luck with that.

*I found a fruit fly wedged into the parafilm around a bacterial dish once and I have never forgiven the flies since. What the F U C K

[cacanhmini]

[science-selected-yura15cbx]

SciNat за июль 2023 #2: микроскопы, микроядра и нанотела

https://t.me/science_yura15cbx/281/371?single

SciNat за июль 2023 #2: микроскопы, микроядра и нанотела

https://biomolecula.ru/articles/scinat-za-iiul-2023-2-mikroskopy-mikroiadra-i-nanotela

Американские исследователи подошли к решению этой проблемы радикально. Они поместили развивающиеся эмбрионы Danio rerio в специальный растягивающийся гидрогель. Этим они увеличили объем ядра в четыре тысячи раз, и это позволило детально рассмотреть процессы транскрипции в исследуемых клетках с помощью конфокального микроскопа.

Они смогли визуализировать взаимодействие транскрипционного факт��ра Nanog с нуклеосомами и РНК-полимеразой II. Кроме того, они продемонстрировали динамическое взаимодействие между промоторами и энхансерами при активации генома в развивающемся эмбрионе. %-[. ]

[hellsitegenetics]

In this valentines day I am actually going to confess my HATRED towards dolphins

I don't know if it's because of the ridiculous amount of cursed facts I have been told, the fact that they can be evil, just unsubstantiated hatred or the fact that I almost got bit by one when I was in 4th grade during a very shady school trip to a zoo.

I just hate them man, they're pure nightmare fuel, in dreams they have bitten my head off, their skin looks so akin to human skin yet so much like plastic, their eyes have no souls in them but the ones they've consumed.

And while yes, they're animals, they're also incredibly smart which only means when they force themselves upon whatever other dolphin, animal or even human has the disgrace to, they know what they're doing.

They have been a main cause of shark attacks, and just as if not more likely to attack than sharks.

This is the face of a species of animals that can and will kill for FUN.

I Hate these glorified aquatic mammal fucks.

But GOD they're fascinating.

And did not deserve whatever the CIA was on when they tried to get dolphins to speak English what the fuck even happened there.

String identified:

t at a a acta gg t c AT ta

't t' ca t c at c act a t, t act tat t ca , t tatat at t act tat at gt t a 4t ga g a a c t t a .

t at t a, t' gta , a t a tt a , t a t a t c atc, t a t t t t' c.

A , t' aa, t' a c at c a t c t at t , aa a a t gac t, t at t' g.

T a a a ca a attac, a t a t t attac ta a.

Closest match: Danio rerio genome assembly, chromosome: 6 Common name: Zebrafish

#tumblr genetics #genetics #asks #requests #sent to me #dolphins #fish #ocean #zebrafish #valentines day

[rnomics]

Viruses, Vol. 15, Pages 768: Susceptibility and Permissivity of Zebrafish (Danio rerio) Larvae to Cypriniviruses

The zebrafish (Danio rerio) represents an increasingly important model organism in virology. We evaluated its utility in the study of economically important viruses from the genus Cyprinivirus (anguillid herpesvirus 1, cyprinid herpesvirus 2 and cyprinid herpesvirus 3 (CyHV-3)). This revealed that zebrafish larvae were not susceptible to these viruses after immersion in contaminated water, but that infections could be established using artificial infection models in vitro (zebrafish cell lines) and in vivo (microinjection of larvae). However, infections were transient, with rapid viral clearance associated with apoptosis-like death of infected cells. Transcriptomic analysis of CyHV-3-infected larvae revealed upregulation of interferon-stimulated genes, in particular those encoding nucleic acid sensors, mediators of programmed cell death and related genes. It was notable that uncharacterized non-coding #RNA genes and retrotransposons were also among those most upregulated. CRISPR/Cas9 knockout of the zebrafish gene encoding protein kinase R (PKR) and a related gene encoding a protein kinase containing Z-DNA binding domains (PKZ) had no impact on CyHV-3 clearance in larvae. Our study strongly supports the importance of innate immunity-virus interactions in the adaptation of cypriniviruses to their natural hosts. It also highlights the potential of the CyHV-3-zebrafish model, versus the CyHV-3-carp model, for study of these interactions. https://www.mdpi.com/1999-4915/15/3/768?utm_source=dlvr.it&utm_medium=tumblr