Sentences with phrase «jellyfish aequorea»

Worms, hydroids (sea anemone and jellyfish relatives), crustaceans and bryozoans that form branch - like underwater colonies were not far behind.

And this radial symmetry is essential to how the jellyfish moves and eats, first author Abrams says.

In recent years, it seems that the number of jellyfish have been on the rise, fueling concerns that their voracious appetites for microscopic sea creatures might have a negative impact on the food web and that their density might alter how fish behave — young fish seek refuge among the jellies» tentacles, for example — and consequently hamper the ability of predators to catch these fish.

Not only has the parasitic micro jellyfish evolved a stripped - down body plan of just a few cells, but via data generated at the KU Medical Center's Genome Sequencing Facility researchers also found the myxozoan genome was drastically simplified.

«I then knew I could build a jellyfish,» he says.

«But Myxozoa is definitely an animal because its evolutionary origin is shared with jellyfish, and we use species» ancestry to define them.

«In the oceans we no longer have many anchovies, but we seem to have an awful lot of jellyfish,» says Gotelli.

«I could easily imagine medusoids used in large numbers to clean up oil spills in a similar manner to the way a jellyfish filters out its food,» he adds.

About one - fifth of the time, the birds altered their ascent to go after young fish hiding among the jellyfish, the seabird specialist and his colleagues report online in Biology Letters.

Determining how such departures and arrivals influence complicated marine food webs will be difficult work, she says, involving laborious field surveys and careful counts of jellyfish stomach contents.

The team focused their study on the jellyfish's juvenile, or ephyra, stage, because the ephyra's simple body plan — a disk - shaped body with eight symmetrical arms — would make any tissue regeneration clearly visible.

Not only do the 2 - meter - long jellyfish compete for food with young pollack — one of the Bering's most valuable fish — but they also eat them.

SAN FRANCISCO — A jellyfish invasion might sound like the plot of a bad movie banished to late night TV.

This so - called resymmetrization occurred whether the animal had as few as two limbs remaining or as many as seven, and the process was observed in three additional species of jellyfish ephyra.

Instead, the mechanical forces created by the jellyfish's own muscle contractions were essential for symmetrization.

For years, scientists have been debating the taxonomic status of Dickinsonia — placing it with fungi, marine worms and jellyfish, to name a few.

«Symmetrization is a combination of the mechanical forces created by the muscle contractions and the viscoelastic jellyfish body material,» Abrams says.

They then coated the mould with heart muscle cells from a rat, lining them up in such a way that the alignment of the fibre networks in the muscle matched that of the fibres in the jellyfish.

«Researchers sequence genomes of parasite that is actually a «micro jellyfish».»

Jellyfish populations appear to be exploding in several parts of the world, U.S. and Russian scientists reported, raising fears that they are taking over ecosystems that nurture key commercial fish stocks.

In fact, when muscle relaxants were added to the seawater surrounding an injured jellyfish, slowing the animal's muscle contractions, the symmetrization of the intact arms also was slowed down.

«These were 20 to 40 times smaller than average jellyfish genomes,» Cartwright said.

«Newly discovered self - repair mechanism: Injured jellyfish seek to regain symmetry.»

There are several reasons why symmetry might be more important to the developing jellyfish than regenerating a lost limb.

In the Gulf of Mexico, a foreign jellyfish produced a huge bloom off Alabama's coastline last summer, reported Monty Graham of the state's Sea Lab on Dauphin Island.

Each contraction of the heart muscle makes the artificial jellyfish's body suddenly bend, propelling it forward.

Enhanced green fluorescent protein, or EGFP, was first discovered in jellyfish and is what gives these sea creatures their bright luminescence.

In the short term, with increasing temperatures as well as local human - made threats like coastal development, pollution, and over-fishing, the study found that corals — tiny animals related to jellyfish — would be over-run by seaweed which would, in effect, suffocate them.

It will deploy grippers inspired by jellyfish to embrace the target before steering itself on a suicide dive into Earth's atmosphere.

The Atlantic invader, Mnemiopsis leidyi, may soon get its comeuppance, however, as yet another exotic jellyfish has arrived — and it feasts on M. leidyi.

«The cycle of contraction and the viscoelastic response from the jellyfish tissues leads to reorganization of the body.

The target fragment binds to a gene switch in the DNA, which triggers the production of a colourful substance such as the protein that gives jellyfish a green glow under ultraviolet light, or proteins from bacteria that produce colour changes visible to the naked eye.

But Caltech assistant professor of biology Lea Goentoro, along with graduate student Michael Abrams and associate research technician Ty Basinger, were interested in another organism, the moon jellyfish (Aurelia aurita).

Parker was inspired by the similarity between the pumping heart muscle tissue he had seen in the lab and the jellyfish propulsion he saw while visiting the New England Aquarium in Boston.

Called a medusoid, after the umbrella - shaped class of jellyfish it mimics, the silicone cyborg uses heart muscle cells from a rat to recreate the pumping motion of the moon jellyfish, Aurelia aurita.

In 2004, a year after the dam was partially filled, scientists noted a jellyfish species in the Yangtze that had previously only reached the South China Sea.

If a sea turtle takes a bite out of a jellyfish, the injured animal can quickly grow new cells to replace the lost tissue.

In the few cases when the injured animals do not symmetrize — only about 15 percent of the injured animals they studied — the unsymmetrical ephyra also can not develop into normal adult jellyfish, called medusa.

Despite its singular appearance, the man - of - war isn't a jellyfish; rather, it's a siphonophore, which is a colony of organisms that are dependent on each other for survival.

Jellyfish, polyps and the like belong to a phylum called Cnidaria, one of about 30 major groups that make up the animal kingdom.

Sea anemones are part of the same group of invertebrates as jellyfish and possess the same potent stinging cells, known as cnidocytes.

To keep jellyfish, fungi and other creatures from overtaking healthy habitats, scientists are exploring food webs and tipping points

One of the prizes awarded this past September went to Martin Chalfie and colleagues for their work with jellyfish (Jellyfish!

Now, the robot's first findings are already helping scientists piece together more of this previously hidden under - ice food web, including more evidence of the under - ice algae, as well as tiny copepods, ctenophores (jellyfish), predatory marine worms called arrow worms, and abundant amounts of large floating slime balls, known to scientists as larvaceans.

With the assistance of Global Explorer, a ROV equipped with a high definition color video camera and digital still camera, the researchers were able to snap some of the first pictures of numerous species that are believed to be new to science, including this red medusa jellyfish, which belongs to the genus Atolla.

A scientist supported by the NSF was the first to isolate the green fluorescent protein (GFP) in the jellyfish Aequorea victoria.

To trace individual neurons, Jeff Lichtman of Harvard uses engineered mice whose DNA includes jellyfish genes so that the cells contain fluorescent proteins.

Susan Milius explained that gelatinous creatures provide food for some ocean dwellers, homes for others and more in «Seeing past the jellyfish sting» (SN: 9/6/14, p. 16).

The Pacific Ocean jellyfish Aequorea victoria, it appears, produces just the sort of light that researchers try to coax from crystalline semiconductors such as gallium arsenide or indium phosphide.

In her new book, Spineless, former marine scientist Juli Berwald sets out to find the truth about the jellyfish take - over.