Navigation Links
Sea hares outsmart peckish lobsters with sticky opaline
Date:3/28/2013

Sea hares are not the favourite food choice of many marine inhabitants, and it's easy to see why when you find out about the chemical weapons they employ when provoked namely, two unpalatable secretions, ink and opaline, which they squirt at unsuspecting peckish predators. However, while much is known about the consequences of purple ink secretion, how the whitish and viscous opaline outsmarts a potential predator remains unknown. Charles Derby from Georgia State University, USA, wondered whether opaline could decrease the activity of a predator's sensory system. Along with his colleagues Tiffany Love-Chezem and Juan Aggio, he set out to test the effect of opaline on spiny lobsters, which occasionally try to snack on sea hares. The investigating trio find that it is opaline's sticky nature, rather than the chemicals present in the opaline, that is responsible for plugging their sense of smell and published their results in The Journal of Experimental Biology at http://jeb.biologists.org.

To begin, they extracted the water-soluble fraction of opaline, and although this lacks the amino acids and other chemical attractants that make up opaline, it is nonetheless just as sticky and possesses the physical properties of opaline. The team then painted this sticky, water-soluble fraction onto the tips of the lobsters' antennules, which act as the lobster's 'nose' and are important for motivation and ability to feed upon smelling a delicious treat. The trio then presented them with tasty smelling 'shrimp juice' and measured electrical activity in both chemosensory and motor neurons. Unlike lobsters with clean, gunk-free antennules, the shrimp juice failed to whet the appetite of opaline-treated lobsters, with the response of chemosensory and motor neurons being significantly reduced.

The team next wondered whether the amino acids present in opaline could also dampen neuronal activity. Mixing together the five most prominent amino acids found in opaline, they again painted the antennules and tempted the lobsters with the scent of shrimp juice. This time, however, the neurons fired robustly in reaction to the delicious shrimpy aroma. When the amino acids were mixed with the sticky substance carboxymethylcellulose, the neuron reactions were again inhibited. Furthermore, carboxymethylcellulose alone also stopped neurons firing. So, it seems that stickiness is the key to blocking neurons and allowing the sea hare to escape as the lobster preens and cleans itself of the gungy opaline.


'/>"/>

Contact: Nicola Stead
nicola.stead@biologists.com
44-012-234-25525
The Company of Biologists
Source:Eurekalert

Related biology news :

1. UCSB researchers to examine the effects of year-old NOAA West Coast Catch Shares program
2. University spin-out company shares in £7.9 million marine energy funding boost
3. Catching up with catch shares
4. New nanoglue is thin and supersticky
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/2/2016)... The Department of Transport Management (DOTM) ... million US Dollar project, for the , Supply ... Enrolment, and IT Infrastructure , to ... implementation of Identity Management Solutions. Numerous renowned international vendors participated ... was selected for the most compliant and innovative ...
(Date:5/24/2016)... IRVINE, Calif. , May 24, 2016 Ampronix facilitates superior patient care ... LMD3251MT  3D medical LCD display is the latest premium product recently added to ... ... ... Sony 3d Imaging- LCD Medical Display- Ampronix News ...
(Date:5/9/2016)... Elevay is currently known as ... for high net worth professionals seeking travel for work ... world, there is still no substitute for a face-to-face ... your deal with a firm handshake. This is why ... of citizenship via investment programs like those offered by ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... CLEVELAND , June 27, 2016  Global ... average 4.6 percent through 2020 to $7.2 billion.  ... (food and beverages, cleaning products, biofuel production, animal ... and biotechnology, diagnostics, and biocatalysts). Food and beverages ... gains driven by increasing consumption of products containing ...
(Date:6/27/2016)... ... June 27, 2016 , ... Newly ... technologies, services and solutions to the healthcare market. The company's primary focus is ... manufacturing, sales and marketing strategies that are necessary to help companies efficiently bring ...
(Date:6/24/2016)... 2016 Epic Sciences unveiled a liquid ... to PARP inhibitors by targeting homologous recombination deficiency ... new test has already been incorporated into numerous ... types. Over 230 clinical trials are ... including PARP, ATM, ATR, DNA-PK and WEE-1. Drugs ...
(Date:6/23/2016)... CAMBRIDGE, Mass. , June 23, 2016 /PRNewswire/ ... the development of novel compounds designed to target ... compound, napabucasin, has been granted Orphan Drug Designation ... in the treatment of gastric cancer, including gastroesophageal ... cancer stemness inhibitor designed to inhibit cancer stemness ...
Breaking Biology Technology: