Navigation Links
Spiders who eat together, stay together: UBC research
Date:8/6/2008

The ability to work together and capture larger prey has allowed social spiders to stretch the laws of nature and reach enormous colony sizes, UBC zoologists have found.

The findings, published in this week's edition of the Proceedings of the National Academy of Science, may also explain why social spiders thrive in tropical areas but dwindle with increasing latitude and elevation.

"The size of organisms tends to be constrained by a scaling principle scientists call 'surface to volume ratio,'" says Leticia Avils, lead author and associate professor in the UBC Dept. of Zoology. While organisms typically have energetic needs proportional to their volume, they must acquire nutrients through their surface.

"As the organism grows, this surface to volume ratio declines. In a way, this is how nature keeps the sizes of various species in check."

The same principle may apply to social groups. The surface area of the three-dimensional webs social spiders use to capture prey does not grow as fast as the number of spiders contained in the nests; so number of incoming prey per spider declines with colony size. But Anelosimus eximius, a species of social spider notable for its enormous colony size some total more than 20,000 individuals have gained the ability to stretch that law by cooperating and thus capturing increasingly large insects as their colonies grow.

"The average size of the prey captured by the colony increased 20-fold as colony size increased from less than 100 to 10,000 spiders," says Avils, who studied the spiders in the wild in Amazonian Ecuador with undergraduate student Eric Yip and graduate student Kimberly Powers.

"So even though the number of prey falls sharply as the colony grows, the biomass that individual spiders acquire actually increases."

The study also found that large prey, while making up only eight per cent of the colony's diet, contributed to more than 75 per cent of
'/>"/>

Contact: Brian Lin
brian.lin@ubc.ca
604-822-2234
University of British Columbia
Source:Eurekalert

Page: 1 2

Related biology news :

1. Life Sciences Discovery Fund awards health research project grants
2. UGA researchers win $9.2 million stem cell grant from NIH
3. Research exposes new target for malaria drugs
4. Broad Institute researchers introduce next generation tool for visualizing genomic data
5. Spanish researchers discover significant leatherback turtle nesting beaches in the Caribbean
6. DOE and USDA announce more than $10 million in bioenergy plant feedstock research
7. EPA funds ground-breaking Lyme disease research
8. ORNL researchers analyze material with colossal ionic conductivity
9. UNH researchers tag first-ever free-swimming leatherback turtles in New England
10. Small research at MSU leads to advances in energy, electronics
11. FSU, Magnet Lab researchers license critical petroleum data
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/12/2015)... Aug. 12, 2015  Synaptics Inc. (NASDAQ: ... solutions, today announced that four of its fingerprint ... have officially been named FIDO Certified™ by the ... the certification, Synaptics, Natural ID™ fingerprint solutions are ... Framework (UAF) standard and are interoperable among other ...
(Date:8/6/2015)... TELTOW, Germany , August 6, 2015 ... SensoMotoric Instruments (SMI) shows the world,s first ... based on Epson,s Moverio BT-200 see-through head mounted ... this new solution, unprecedented quality and efficiency is brought ... context-sensitive displays. For the first time, professionals and researchers ...
(Date:8/4/2015)... , Aug. 04, 2015 ... http://www.researchandmarkets.com/research/nvh7k2/digital_forensics ) has announced the addition of ... (Hardware, Software, and Service), Sub-Segment (Computer Forensics, ... Forensics), Tool Types, Service, Vertical and Region ... to their offering. By Component ...
Breaking Biology News(10 mins):Synaptics Announces FIDO Certification of Natural ID Fingerprint Solutions 2Synaptics Announces FIDO Certification of Natural ID Fingerprint Solutions 3SMI Shows First Eye Tracking Upgrade for Augmented Reality Glasses 2SMI Shows First Eye Tracking Upgrade for Augmented Reality Glasses 3Digital Forensics Market - The Market Represents a Compound Annual Growth Rate (CAGR) of 11.3% From 2015 to 2020 2
... University professor is helping students improve their confidence ... learning. Candice Shoemaker, professor of horticulture, has ... and self-efficacy. Self-efficacy involves student confidence in understanding ... learning and achievement. Shoemaker,s published research appeared in ...
... University of Guam ecologist Thomas Marler recently mobilized efforts ... eruption of Mount Pinatubo, Philippines. "My interest was sparked ... was so powerful it changed global climate, yet after ... ecosystem had not been studied," said Marler. ...
... of all women scientists and one-quarter of male scientists at ... them from having as many children as they had wanted, ... Methodist University (SMU). The study, "Scientists Want More ... and Anne Lincoln of SMU and appears in the current ...
Cached Biology News:Finding their way: Study shows connection between academic direction and student learning 2Finding their way: Study shows connection between academic direction and student learning 3Guam researcher studies Mount Pinatubo ecosystem recovery 2Many top US scientists wish they had more children 2Many top US scientists wish they had more children 3
(Date:8/31/2015)... Research and Markets ( http://www.researchandmarkets.com/research/k6lcp2/mexico_biomedical ) has ... Market - Growth, Trends & Forecasts (2014-2020)" report ... Biomedical Sensors market is estimated at $0.20 billion by ... 2014-2020 The near future will bring biomedical ... each individual. These sensors can be set to trigger ...
(Date:8/31/2015)... , Aug. 31, 2015  RXi Pharmaceuticals ... focused on discovering and developing innovative therapies primarily ... announced that the 30-day review period following the ... for ocular indications with the U.S. Food and ... is now active. Logo -  ...
(Date:8/31/2015)... 2015 Trimb Healthcare AB ("Trimb") today announced ... Group BV ("YouMedical"), a Dutch OTC company with operations ... of approximately EUR 16 million, with solid growth and ... ambition is to build a leading international OTC company, ... goal. YouMedical gives us a stronger North European OTC ...
(Date:8/30/2015)... England , August 31, 2015 ... Wartezeit   einer Frau   für chirurgische   Behandlung ... Alter von 7-90   werden für eine   ... soll 1200 Frauen behandeln und die Anzahl ausgebildeter Chirurgen ... Astellas gab heute bekannt, dass  Action on ...
Breaking Biology Technology:Mexico Biomedical Sensors Market Report 2015-2020 2RXi Pharmaceuticals Announces Advancements in its Ophthalmology Clinical Program with RXI-109 2RXi Pharmaceuticals Announces Advancements in its Ophthalmology Clinical Program with RXI-109 3RXi Pharmaceuticals Announces Advancements in its Ophthalmology Clinical Program with RXI-109 4Über 550 Frauen, deren Leben durch "Action on Fistula" transformiert wurde 2Über 550 Frauen, deren Leben durch "Action on Fistula" transformiert wurde 3Über 550 Frauen, deren Leben durch "Action on Fistula" transformiert wurde 4Über 550 Frauen, deren Leben durch "Action on Fistula" transformiert wurde 5
... major obstacle in producing transistors from networks of carbon ... print circuits on plastic sheets for applications including flexible ... aircraft to monitor crack formation. , The so-called "nanonet" ... overlapping in a fishnet-like structure - has been plagued ...
... or the Company), (Nasdaq: ERES ), a ... and other services to the,pharmaceutical, biotechnology, medical device ... Keith D. Schneck as Executive Vice,President and Chief ... Schneck joins eRT with over 30 years of ...
... 8%, - Non-GAAP Operating Earnings Down 6%, GAAP Operating ... Non-GAAP Diluted EPS Down 2%, GAAP Diluted EPS Down 19%, ... today reported third fiscal quarter 2008 revenues of,$244.4 million, representing ... third quarter of fiscal year 2007. Sales grew for both,industrial ...
Cached Biology Technology:'Nanonet' circuits closer to making flexible electronics reality 2'Nanonet' circuits closer to making flexible electronics reality 3'Nanonet' circuits closer to making flexible electronics reality 4eResearchTechnology Names New Chief Financial Officer 2eResearchTechnology Names New Chief Financial Officer 3Varian, Inc. Reports Third Quarter 2008 Results 2Varian, Inc. Reports Third Quarter 2008 Results 3Varian, Inc. Reports Third Quarter 2008 Results 4Varian, Inc. Reports Third Quarter 2008 Results 5Varian, Inc. Reports Third Quarter 2008 Results 6Varian, Inc. Reports Third Quarter 2008 Results 7Varian, Inc. Reports Third Quarter 2008 Results 8Varian, Inc. Reports Third Quarter 2008 Results 9Varian, Inc. Reports Third Quarter 2008 Results 10Varian, Inc. Reports Third Quarter 2008 Results 11Varian, Inc. Reports Third Quarter 2008 Results 12Varian, Inc. Reports Third Quarter 2008 Results 13Varian, Inc. Reports Third Quarter 2008 Results 14Varian, Inc. Reports Third Quarter 2008 Results 15Varian, Inc. Reports Third Quarter 2008 Results 16Varian, Inc. Reports Third Quarter 2008 Results 17Varian, Inc. Reports Third Quarter 2008 Results 18Varian, Inc. Reports Third Quarter 2008 Results 19Varian, Inc. Reports Third Quarter 2008 Results 20Varian, Inc. Reports Third Quarter 2008 Results 21Varian, Inc. Reports Third Quarter 2008 Results 22Varian, Inc. Reports Third Quarter 2008 Results 23Varian, Inc. Reports Third Quarter 2008 Results 24Varian, Inc. Reports Third Quarter 2008 Results 25
... data collection and automation that is controlled from ... Excel , Pre-configured library of interfaces for ... can be added and configured by the user ... into one spreadsheet , Allows for ...
...
Peptide-affinity Purified Polyclonal Antibody to MAML1 / Mastermind Peptide with sequence VLPTCPMAEFALPR, from N Terminus of the protein sequence according to NP_055572....
One unit is equal to 10Kb (insert DNA + vector). The final cost will increase or decrease according to the final assembled genome size. The price does not include genome annotation....
Biology Products: