MEDUSES
MEDUSES
MEDUSES
New fluorescent proteins have been identified in crystal jellyfish. However, the information is too limited for scientists to fully exploit their potential.
Jellyfish are a nuisance to ecosystems and human activities. But they can also be a source of inspiration for researchers. Like these hydrophones bio-inspired by jellyfish otoliths!
"In this article, discover how the Aurelia aurita jellyfish aurita has adapted to the changing composition of plankton in the Irish Sea thanks to temperature variations."
New methods enable efficient reproduction of primary cnidarian cells (corals, anemones, jellyfish). a a necessary tool for further experiments in functional cell biology in cnidarians.
"Hydractinia echinatais a jellyfish-like species whose growth could be strongly affected by ocean warming in the years to come. This study also points out that this could be the case for many fixed cnidarians."
Carpets of fleshy (mat-like) red algae form in the Mediterranean and Atlantic. They appear to be substitute habitats for fixed invertebrate animals during major climatic changes.
This article is a fine example of the genetic proximity between different cryptic jellyfish species. It shows how geographical isolation can lead to the creation of a new species in a cubozoan jellyfish.
The strobilation stage in jellyfish development is probably the key to the evolutionary success of these animals. This mode of reproduction enables jellyfish to rapidly colonize environments.
"Today in @Nature @GMarchessaux discusses predictions about the future distribution of an invasive freshwater hydrozoan. Significant ecological consequences are to be expected. "
Researchers using remotely operated underwater vehicles were lucky enough to come across a Stygiomedusa giganteanicknamed the "ghost jellyfish", in Monterey Bay.
How the lifestyle and biology of jellyfish help evolutionary neuroscience research move forward.
The green fluorescent protein of jellyfish is used in genetics as a gene marker. This is Aequorea victoria is most often used. But Cytaeis uchida is a very effective solution.
A group of researchers has set up a culture protocol for the ctenophore Mnemiopsis leidyi and work on its genome using the CRISPR-Cas9 tool.
Thanks to modern observation techniques, scientists have been able to understand in detail how sea anemone stinging cells work.
"THREAD MEDUSES PAULY: #DanielPauly is one of the world's leading specialists in marine resources. He is director of the @SeaAroundUs. The Paris Aquarium had the pleasure of meeting him and discussing the topic of #medusas. Here is some of his work on the subject.
A bloom of jellyfish has been spotted off Haifa in Israel. Overfishing, pollution, ocean warming and other factors explain such a concentration.
Research into the DNA of "immortal jellyfish" has slowed down recently, but is now picking up pace again. How might the genes of this species be relevant to the fight against human aging?
"The discovery of a fossil ofAuroralumina attenboroughii (jellyfish), probably one of the earliest earliest animals on our planet, is helping scientists to better understand the early stages of species evolution."
Inspired by the way jellyfish capture their prey, scientists have optimized comprehensive algorithms (often from the fields of operations research, engineering or artificial intelligence).
Antonella Leone, biochemistry researcher at the National Research Council - Institute of Science of Food Production in Lecce, is studying jellyfish. She is looking for new ways to use jellyfish in food and medicine.
Some jellyfish are able to regenerate after being cut into pieces. Interview with Chiara Sinigagliaresearcher @CNRS (Observatoire Océanologique de Banyuls-sur-Mer).
Since January, many jellyfish and physalies have been washing up on French beaches. The phenomenon is particularly marked on the Atlantic coast. Storms, currents and fishing may explain the higher-than-usual presence.
"Jellyfish Cassiopea jellyfish live attached to the seabed. The pulsation of their umbrella can create a suction-expulsion of water in non-negligible quantities. This water circulation modifies the transit of certain particles in the aquatic environment." https://twitter.com/AquaParis_off/status/1635204051381141505
Gelatinous plankton (such as jellyfish) are increasingly present, while phytoplankton are becoming scarce. Food composition is changing for predators. Small pelagic fish are in danger of disappearing rapidly.
Some parasites spend a stage of their life in jellyfish (e.g. Rhizostoma, Rhizostoma, Rhizostoma): Rhizostoma pulmo), themselves eaten by fish (the definitive host of these parasites). The presence of of jellyfish facilitates the transmission of parasites in the trophic chain.
Gelatinous plankton is increasingly present in the ocean. This is often explained by overfishing and global warming. Here, the movement of water masses is shown to be responsible for large populations of salps. of salps.
Scientists often wonder whether sponges or cnidarians (corals, jellyfish...) appeared first. This study brings up a new group as potentially being the first: ctenaria!
STMG students at the Lycée Fesch in Ajaccio have invented a technique for recycling jellyfish scraps to make natural fertilizer for plants. Just what they need to be finalists in a major European innovation award!
Jelly-Z is a soft explorer robot inspired by the body and movement of jellyfish. Jelly-Z's displacement performance is very good, and its materials are of the same type.
The YOLOv4-tiny algorithm aims to identify jellyfish and produce statistics on their proliferation worldwide. The idea is to exploit a wealth of photographic data with deep learning.
Scientists are currently studying the world's oldest jellyfish fossil (in the planktonic sense of the term) (-500Ma). This jellyfish Burgessomedusa phasmiformis would have been a predator of the larvae of the famous Anomalocaris canadensis.
Marine biology researchers at the Perpignan research unit want to use invasive jellyfish as cosmetics, biogas, food...
Not all jellyfish are abundant or invasive. Some are rare and sometimes endangered. Sediments dislodged by ocean mining could disrupt the metabolism of these jellyfish and upset the associated food webs.
Jellyfish are considered one of the first animals to appear on Earth. However, the first jellyfish probably didn't have a "jellyfish" stage in their lives, but simply a "polyp" stage.
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