Navigation Links
Voracious comb jellyfish 'invisible' to prey
Date:10/12/2010

Despite its primitive structure, the North American comb jellyfish can sneak up on its prey like a high-tech stealth submarine, making it a successful predator. Researchers, including one from the University of Gothenburg, have now been able to show how the jellyfish makes itself hydrodynamically 'invisible'.

The North American comb jellyfish Mnemiopsis leidyi has long been known to consume vast quantities of zooplankton. A few years ago the species became established in Northern Europe.

Like many other jellyfish, Mnemiopsis leidyi has a large gelatinous body. The large size increases its chances of encountering prey, but can also be a disadvantage since the prey organisms are often highly sensitive to movements in the water. Nevertheless, the comb jellyfish manages to catch large amounts of copepod plankton, which are known for their acute escape response.

Able to catch the world's most vigilant plankton

'Copepods have a well developed ability to detect even the slightest water disturbance,' says Lars Johan Hansson, a researcher at the Department of Marine Ecology at the University of Gothenburg. 'They can swim well clear of the source of water deformation in just a split second. How the comb jellyfish is able to approach and catch some of the animal world's most vigilant plankton has up until now been unknown.'

The researchers used advanced video technology to study water flows around and within the comb jellyfish. These measurements were then used to calculate the water deformation generated by the jellyfish and compare this with the levels that trigger an escape response in copepods.

'It emerged that the comb jellyfish uses microscopic, hairlike cilia inside its oral lobes to generate a feeding current that carefully transports water between the lobes. As the water accelerates slowly and is transported undisturbed into the jellyfish together with the prey, there is nothing that alarms the prey until it is next to the capture site inside the lobes, by which time it's too late to escape. This makes the jellyfish a hydrodynamically silent predator.'


'/>"/>

Contact: Lars Johan Hansson
lars.hansson@marecol.gu.se
46-317-862-624
University of Gothenburg
Source:Eurekalert  

Related biology news :

1. Voracious sponges save reef
2. Lethal backfire: Green odor with fatal consequences for voracious caterpillars
3. New online report on massive jellyfish swarms released
4. Fireflies and jellyfish help illuminate quest for cause of infertility
5. Jellyfish joyride a threat to the oceans
6. Scientists unravel evolution of highly toxic box jellyfish
7. The jellyfish-like salp: Most efficient filter-feeder in the deep, scientists discover
8. Research shows that invisible hand guides evolution of cooperative turn-taking
9. Seeing previously invisible molecules for the first time
10. UW-built device reveals invisible world teeming with microscopic algae
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Voracious comb jellyfish 'invisible' to prey
(Date:5/23/2017)... the first robotic gym for the rehabilitation and functional motor sense evaluation ... Genoa, Italy . The first 30 robots will be available from ... . The technology was developed and patented at the IIT laboratories ... Technology thanks to a 10 million euro investment from entrepreneur Sergio Dompè. ... ...
(Date:4/24/2017)... -- Janice Kephart , former 9/11 Commission ... LLP (IdSP) , today issues the following statement: ... 6, 2017 Executive Order: Protecting the Nation ... instilled with greater confidence, enabling the reactivation of ... are suspended by until at least July 2017). ...
(Date:4/13/2017)... SANTA MONICA, Calif. , April 13, 2017 /PRNewswire/ ... New York will feature emerging and ... Innovation Summits. Both Innovation Summits will run alongside the ... variety of speaker sessions, panels and demonstrations focused on ... east coast,s largest advanced design and manufacturing event will ...
Breaking Biology News(10 mins):
(Date:7/20/2017)... ... 2017 , ... Crucial Data Solutions (CDS) is excited to ... unified. TrialKit, a native mobile app, empowers investigators and clinicians to build, deploy, ... mobile devices. With TrialKit, clinical researchers can utilize Core Motion technologies and Apple’s ...
(Date:7/18/2017)... ... July 18, 2017 , ... Blood centers traditionally see ... the region. Nationally, summer is a struggle for community blood centers as high schools ... San Antonio Chamber of Commerce is teaming up with the South Texas ...
(Date:7/17/2017)... ... July 17, 2017 , ... ... safety software company AB Cube has joined its eHealth App xChange ... technology innovation across life sciences and healthcare. Under the partnership, AB Cube’s ...
(Date:7/17/2017)... JOHNSTON, Iowa (PRWEB) , ... July 17, 2017 ... ... new component of its long-standing innovation strategy. A website (openinnovation.pioneer.com) dedicated ... on five strategic areas – trait discovery, plant breeding, enabling technologies, biologicals and ...
Breaking Biology Technology: