Non-Environmental Cost-Benefit News
Colony founding by pleometrosis in the semiclaustral seed-harvester ant Pogonomyrmex californicus (Hymenoptera: Formicidae)
11/01/04
Colony founding by pleometrosis in the semiclaustral seed-harvester ant Pogonomyrmex californicus (Hymenoptera: Formicidae)
Pleometrosis, or colony founding via multiple queens, occurs in a localized population of the seed-harvester ant Pogonomyrmex californicus. In an apparently unusual secondary modification, queens of P. californicus are also obligate foragers; that is, queens must forage to garner the resources necessary to rear their first brood. Laboratory experiments measured the costs and benefits of pleometrosis and queen foraging in P. californicus in terms of queen survival, mass loss by queens and brood production. In all experiments, queen survival was positively associated with number of queens. Queen survival also varied with food level: survival was higher in fed treatments compared with unfed treatments at low queen numbers, whereas survival of unfed queens increased to the level of fed queens at higher queen numbers. Total mass loss of queens varied by food level, but not queen number, with fed queens losing about 50% less mass than unfed queens. Brood production also varied with queen number and food level. Total number of brood was positively associated with number of queens; at each queen number, fed queens produced more brood than unfed queens. The number of brood produced per queen, however, was similar across queen numbers. Fed queens also produced workers that were heavier than those produced by unfed queens, whereas head width of these minims was similar. Longer-term experiments revealed that these queen associations do not undergo queen reduction upon emergence of the first workers, but rather exhibit primary polygyny.
by Robert A Johnson. Animal Behaviour. November 2004. Volume 68 Part 5. page 1189
http://www.elsevier.com/wps/find/journaldescription.cws_home/622782/description#description
http://proquest.umi.com/pqdweb?did=784775991&sid=1&Fmt=2&clientId=13371&RQT=309&VName=PQD
Pingbacks:
No Pingbacks for this post yet...
Search
Non-Environmental Cost-Benefit News
Non-Environmental Cost-Benefit News.
Categories
- All
- Economic Development (12)
- Education (5)
- Health (29)
- IT (7)
- Other (44)
- Transportation (4)
Archives
- November 2005 (1)
- May 2005 (4)
- April 2005 (10)
- March 2005 (11)
- February 2005 (14)
- January 2005 (15)
- December 2004 (21)
- November 2004 (13)
- October 2004 (1)
- September 2004 (3)
- May 2004 (1)
- March 2004 (1)
- More...
| Sun | Mon | Tue | Wed | Thu | Fri | Sat |
|---|---|---|---|---|---|---|
| << < | > >> | |||||
| 1 | 2 | |||||
| 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| 31 | ||||||
Choose skin
Environmental Valuation & Cost-Benefit News
- 07/09/08: Launch of the “Little Green Data Book 2008”: Agricultural productivity to drop because of climate change, warns World Bank publication [en-US]
- 07/09/08: The Cost of Uncertain Life Span [en-US]
- 07/08/08: Procurement efficiency for infrastructure development and financial needs reassessed [en-US]
- 07/08/08: Climate Change and Economic Growth: Evidence from the Last Half Century [en-US]
- 07/08/08: IBERDROLA RENOVABLES expects to invest €18.8 billion and achieve net profit of €1 billion in 2012 [en-US]
- 07/08/08: Mayor Bloomberg Announces Long-Term Plan to Reduce Municipal Energy Consumption: Steering Committee Submits Plan to Achieve PlaNYC Goal to Reduce Greenhouse Gas Emissions in Municipal Buildings and Operations by 30 Percent by 2017 [en-US]
- 07/08/08: Europeans Reconsider Biofuel Goal [en-US]
- 07/08/08: The social discount rate : estimates for nine Latin American countries [en-US]
- 07/07/08: Biofuels for Transportation: A Climate Perspective [en-US]
- 07/07/08: Alternative World Energy Outlook (AWEO) and the role of hydrogen in a changing energy landscape [en-US]
- 07/07/08: Water pipelines across US breaking [en-US]
- 07/06/08: New Analysis: Return of New York Recycling a Money-Saver for City - Recycling Program Cuts City Costs & Global Warming Pollution [en-US]
- 07/06/08: State Energy Efficiency Analyses Show Positive Returns for Economic Growth and Job Creation: U.S. Energy Policy Assessment Can Benefit [en-US]
- 07/06/08: Japan Sees a Chance to Promote Its Energy-Frugal Ways [en-US]
- 07/06/08: Energy solutions for sports facilities [en-US]
- 07/06/08: Design and techno-economical optimization for hybrid PV/wind system under various meteorological conditions [en-US]
- 07/06/08: Consumption Side Agglomeration Economies in Japanese Cities [en-US]
- 07/06/08: The Carbon Age Book Launch [en-US]
- 07/06/08: Lieberman-Warner Bill Advances U.S. Climate Legislation Debate: ICF Study Shows Latest Revision to Bill Brings Down Allowance Prices by Over One Third [en-US]
- 07/05/08: Winners of the 2008 ENERGY STAR® CHP (Combined Heat and Power) Award: East Kansas Agri-Energy CHP System [en-US]
- 07/05/08: Cost-Benefit Analysis of Rainwater Harvesting [en-US]
- 07/05/08: Conservancy, Trust for Public Land to Purchase 320,000 Acres of Plum Creek Timber Land [en-US]
- 07/05/08: Co-benefits of Greenhouse Gas Mitigation Policies in China: An Integrated Top-Down and Bottom-Up Modeling Analysis [en-US]
- 07/05/08: Economic Costs of a Market-based Climate Policy [en-US]
- 07/05/08: Voluntary Corporate Environmental Initiatives and Shareholder Wealth [en-US]
- 07/05/08: Estimating the pre-harvest greenhouse gas costs of energy crop production [en-US]
- 07/04/08: Large-Scale Ecosystem Restoration: Five Case Studies from the United States [en-US]
- 07/04/08: Economic Insights of the Lieberman-Warner Bill: Review of Six Economic Modeling Analyses Reveals Important Policy Insights [en-US]
- 07/04/08: World Bank to Offer Index-based Weather Derivative Contracts: Malawi to be first country expected to benefit from innovative initiative [en-US]
- 07/04/08: Economic Growth and Threatened and Endangered Species Listings: A VAR Analysis [en-US]
- More posts...
XML Feeds