Navigation Links
In the sea slug's defense against lobsters, confusion is key

Like many other marine creatures, Aplysia, a common sea slug, enlists chemical defenses against its predators, but the mechanisms by which such chemical attacks actually work against their intended targets are not well understood by researchers. New work has now shown that such chemical defenses can involve modes of trickery that had not previously been appreciated as components of chemical defense.

When attacked by predatory spiny lobsters, sea slugs (also known as sea hares) release an inky secretion, termed ink and opaline, from a pair of glands. The new findings show that Aplysia's defensive secretion includes a variety of chemicals that together comprise a multi-pronged attack on the predator's nervous system, resulting in the usurpation of its normal behavioral control system and a confused response that facilitates the slug's ultimate escape.

The team of researchers conducting the study, Cynthia Kicklighter, Zeni Shabani, and Paul Johnson, led by Charles Derby of Georgia State University, discovered that in addition to containing unpalatable, aversive chemicals, Aplysia's inky secretion contains large quantities of chemicals that are also found in the food of spiny lobsters and that indeed these chemicals serve to activate nervous-system pathways that control feeding behaviors of the lobster. The inky secretion also stimulates other behaviors in the lobster, including grooming and avoidance. Ironically, the slug's ability to trick the lobster's nervous system into activating feeding-associated behaviors succeeds, in combination with ink and opaline's other effects, in distracting the lobster sufficiently to enable the slug's successful evasion.

Because the set of behaviors stimulated by the slug's secretions resemble activation of a feeding pathway, the researchers named this novel chemical defense "phagomimicry." The stickiness of the slug's secretions appears to contribute to long-lasting effects on the target despite the aqueous envi ronment, enhancing the effectiveness of the slug's defense.

Cynthia E. Kicklighter, Shkelzen Shabani, Paul M. Johnson, and Charles D. Derby: "Sea Hares Use Novel Antipredatory Chemical Defenses"


'"/>

Source:Cell Press


Related biology news :

1. Female sex hormones play a vital role in defense against sexually transmitted diseases
2. Disease diagnosis, biodefense among UH chemical research projects
3. Comprehensive biodefense text published
4. Ancient immune defense mechanism is no match for HIV-1
5. Discovery could be key to bioterrorism defense
6. Variation in HIVs ability to disable host defenses contributes to rapid evolution
7. Scientists show that tick-borne flaviviruses use a novel mechanism to evade host defenses
8. Researchers uncover E. colis defense mechanism
9. Energy management in cells may hold key to cancer defense
10. Bacteria recognize antimicrobials, respond with counter-defenses
11. Researchers discover new tumor defense system
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/4/2017)... NEW YORK , April 4, 2017   ... solutions, today announced that the United States Patent and ... The patent broadly covers the linking of an iris ... the same transaction) and represents the company,s 45 th ... our latest patent is very timely given the multi-modal ...
(Date:3/30/2017)... , March 30, 2017  On April 6-7, 2017, ... the Genome hackathon at Microsoft,s headquarters in ... competition will focus on developing health and wellness apps ... Hack the Genome is the first hackathon ... The world,s largest companies in the genomics, tech and ...
(Date:3/30/2017)... 30, 2017 Trends, opportunities and forecast in ... by technology (fingerprint, AFIS, iris recognition, facial recognition, hand ... by end use industry (government and law enforcement, commercial ... banking, and others), and by region ( North ... Asia Pacific , and the Rest of ...
Breaking Biology News(10 mins):
(Date:8/23/2017)... ... August 23, 2017 , ... ... orders for advanced VPG+ 800 Volume Pattern Generators from two major Asian based ... demand for production of advanced photomasks as well as a solution for mid ...
(Date:8/23/2017)... MN (PRWEB) , ... August 23, 2017 , ... ... by health systems and academic medical centers. The network provides members nationally scaled ... limited-distribution drugs and biologics and restrictive payer agreements so members can provide continuity ...
(Date:8/22/2017)... MN (PRWEB) , ... August 22, 2017 , ... ... on opioids in pain management is the practice of opioid-dose sparing. Opioid-dose sparing ... practice has shown promising results, including with non-steroidal anti-inflammatory drugs (NSAIDs). , The ...
(Date:8/21/2017)... ... 20, 2017 , ... Brian Pogue of Dartmouth has been ... The journal is published by SPIE, the international society for optics and photonics. ... optical technology for improved health care and biomedical research. The journal is published ...
Breaking Biology Technology: