Navigation Links
Animal and plant communication at the ESA Annual Meeting
Date:8/4/2009

's no evidence that the coloration in pitcher plants is of any adaptive value for capturing prey," he says. "We don't need to assume that it has an adaptive value, or that it has anything to do with prey."

Specialists are better at avoiding predators

Insect herbivore species often specialize on the host plants that they eat, evolving adaptations to use a plant's unique set of resources. However, specialization doesn't come without costs.

"A lot of evolutionary ecologists have pondered the advantages of being a specialist, and there are presumably tradeoffs," says Michael Singer of Wesleyan University. "Specialists have a smaller resource base, but they might be better adapted to their niche."

Singer and his colleagues wondered if there could be other advantages to specialization than better utilization of host plants as food. Specialists might also be more adept than generalists, he postulated, at using their host plants for defense or refuge from predation, specifically by birds.

The team tested this idea by excluding birds from experimental plots in a temperate forest in Connecticut and surveying the density of generalist and specialist caterpillar species inside and outside the exclosures. In the exclosures, his team observed a surge in generalist density compared to natural areas. The number of specialists, however, only increased slightly. These results suggest that the bird predators were preferentially targeting generalists.

The difference is likely due to the specialists' ability to take better advantage of their host plants, says Singer. Many specialists use chemicals from their host plant's tissue to make themselves toxic. Others, like Singer's specialist caterpillars, might be more adept at camouflaging themselves by finding the best places to hide or to blend in.

Singer's experiment is the first to quantify bird predation on specialist and generalist herbivores, and he hopes
'/>"/>

Contact: Christine Buckley
christine@esa.org
202-833-8773
Ecological Society of America
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. Earliest animals lived in a lake environment, research shows
2. Warmer environment means shorter lives for cold-blooded animals
3. Research network wins approximately £5.7 million to target human and animal diseases in Africa
4. Researchers shed light on trading behavior in animals -- and humans
5. Recruitment of reproductive features into other cell types may underlie extended lifespan in animals
6. FAO/IAEA Symposium to address animal production and health
7. Some vocal-mimicking animals, particularly parrots, can move to a musical beat
8. Countries unite to reduce animal use in product toxicity testing worldwide
9. Genome projects launched for three extreme-environment animals
10. Animals that seem identical may be completely different species
11. The life histories of the earliest land animals
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/29/2014)... edge of science, Clment Vidal takes on big philosophical ... End: Does our universe have a beginning and an ... the universe? What is the role of intelligent life, ... committed to philosophical rigor, the book presents an evolutionary ... an accident, but may well be the key to ...
(Date:7/29/2014)... Ascension Island, one of the world,s largest green turtle ... in the journal Biodiversity and Conservation , scientists ... Conservation Department report that the number of green turtles ... by more than 500 per cent since records began ... now estimated to be laid on the Island,s main ...
(Date:7/29/2014)...  When it comes to technology, healthcare is usually one of ... However, when it comes to wearables, healthcare is trying to move ... Internet of Things and its wearable cousins is less than mature, ... industry, whether it,s in the hospital for a major procedure or ... With that in mind, InformationWeek editor Rodney Brown ...
Breaking Biology News(10 mins):Book: 'The Beginning and the End' 2Major turtle nesting beaches protected in 1 of the UK's far flung overseas territories 2
... because these animals are sensitive to changes in their ... mine" to give researchers early warnings about pollution or ... State University shows that data from the largest amphibian ... if uncorrected, could result in overestimates of frog populations. ...
... August 2nd, 2010 - Using little more than PVC rings, ... feel for soil water retention and field capacity, concepts that ... The demonstration, developed by Adam Howard, Drs. Josh Heitman ... to illustrate concepts that can be difficult for students to ...
... culturing adult human stem cells on a new type of ... about how the cells would differentiate, or what type of ... Aug. 1 edition of Nature Methods . Differentiation ... of cells. Understanding it is key to developing future stem ...
Cached Biology News:'Ribbit Radio' shows frog population estimates are likely flawed 2Students get a feel for soil-water relationships 2New insights into how stem cells determine what tissue to become 2
(Date:7/29/2014)... July 29, 2014 The first product ... next generation approach to robotics. What sets Droidles completely ... pending technology that allows them to communicate, share code ... over the internet. , “The invention is the system,” ... little Droidles a life of their own, both physically ...
(Date:7/29/2014)... (PRWEB) July 29, 2014 White ... devices, and cloud based eClinical technologies, have been published ... Online. These follow a long line of white papers ... publications including Life Science Leader, Pharmaceutical Online, and OpenHealthNews. ... provided a paper by CTO Marc Desgrousilliers, 'The ...
(Date:7/28/2014)... , July 28, 2014 Sapphire Energy, ... today announced the appointment of biotechnology veteran James ... board of directors. Levine replaces Cynthia ,CJ, Warner, who ... will remain chairman of the company,s board of directors. ... Energy,s mission to deliver commercial scale algae-based fuels has ...
(Date:7/28/2014)... Irvine, CA and Annapolis Junction, MD (PRWEB) July 28, ... commercial and research leader in personalized medicine, will be ... testing services at this year’s International Spine Intervention ... will take place July 30th-August 3rd, at the Hyatt ... is designed to enhance the knowledge and clinical competence ...
Breaking Biology Technology:Droidles, the Social Network of Robots and Open Source Platform for the Internet of Things, Launches for Crowd Funding on IndieGoGo.com 2Clinovo White Papers Published in Summer 2014 Editions of Leading Medical Device & Pharmaceutical Publications 2Clinovo White Papers Published in Summer 2014 Editions of Leading Medical Device & Pharmaceutical Publications 3Sapphire Energy Announces New CEO James Levine 2Sapphire Energy Announces New CEO James Levine 3Proove Biosciences Exhibits Industry Leading Data and Research at International Spine Intervention Society’s 22nd Annual Scientific Meeting 2
... Quarter-to-Quarter Revenue Gain Evidences Start of Turnaround ... for Core Business ... Agreements, IRVING, Texas, Aug. 14 Carrington,Laboratories, Inc. (Nasdaq: CARN ) reported ... in the year ago,period. The revenue in the quarter just ended, while 17 percent ...
... Summertime equals fun for a lot of,folks. ... (IBS), typical,summer fare could also mean aggravating their ... for IBS," has more on,what people with IBS ... IBS from,ruining their celebrations. Listen to this ...
... Medical,Technologies, Inc. (the "Company") (Nasdaq: CMED ), ... and markets advanced in-,vitro diagnostic products and high ... it will participate in the Morgan,Stanley,s 2007 China ... Date: August 21, 2007 China Medical Technologies, ...
Cached Biology Technology:Carrington Reports Second Quarter 2007 Results 2Carrington Reports Second Quarter 2007 Results 3Carrington Reports Second Quarter 2007 Results 4Carrington Reports Second Quarter 2007 Results 5Carrington Reports Second Quarter 2007 Results 6Carrington Reports Second Quarter 2007 Results 7
Normal sheep serum collected from healthy normal sheep...
Agarose-ME, 500 g. Suitable for immunoelectrophoresis.Gel point (1.5%): 36 1.5 C, EEO (-mr): 0.16-0.19, Gel strength (1%): > 1000 g/cm2. Category: Nucleotides & Enzymes & Biochemicals, Ultrapure Bio...
Pooled normal sreum with 0.1% sodium azide as preservative...
Trypsin (Pig Pancreas) (TPCK Treated, Highly Purified)...
Biology Products: