Navigation Links
Insects that deter predators produce fewer offspring
Date:1/25/2011

Scientists studied the defences used by caterpillars that transform into large white butterflies, called Pieris brassicae. The insects regurgitate semi-digested cabbage leaves to make them smell and taste unpleasant to predators. The team found, however, that frequent use of this defence reduces the caterpillars' growth rate and the number of eggs they produce. It remains unclear why their defences affect them in this way, but the loss of nutrition from frequent regurgitation is thought to play a part.

Caterpillars are a target of pest control, as they destroy food crop by eating the leaves of cabbages and other vegetable crop. This new study, however, suggests that natural predators, such as farmland birds, do not necessarily have to consume large numbers of insects, to have a significant effect on the size of the population. Researchers found that 40% of caterpillars that defended themselves from predators by regurgitating food, died before transforming into a butterfly, despite successfully surviving the initial attack.

The study also showed that on average large caterpillars have 60 eggs, but those that used their defences against daily predator attacks produced approximately 30 eggs. It is thought that this effect could be widespread amongst herbivorous insects, suggesting that predators may have a larger impact on reducing the population of agricultural pests than previously thought.

Dr Mike Speed, from the University of Liverpool's Institute of Integrative Biology, explains: "Research has shown that large insects produce more eggs than smaller ones. This is commonly assumed to always be the case, but we have found that those that regurgitate food as a defence against predators, have fewer eggs, similar to the numbers of offspring smaller insects have. We also found that these insects grow at a slower rate and even those that successfully change into a butterfly, are smaller than normal."

Dr Andrew Higginson
'/>"/>

Contact: Samantha Martin
samantha.martin@liv.ac.uk
44-015-179-42248
University of Liverpool
Source:Eurekalert

Page: 1 2

Related medicine news :

1. Diet of contaminated insects harms endangered meat-eating plants
2. How pest insects might adapt to climate change, affecting agriculture and health
3. Anthem Blue Crosss Announcement That It Will Temporarily Suspend a 39% Health Insurance Rate Increase Should Not Deter Immediate Legislative Action
4. New Allergy Testing Available for Patients Allergic to Penicillin: Determining the Presence of Penicillin Allergy is Essential to Patient Care
5. The Power of Prayer Deterred Tsunami's Destruction Ministry Reports
6. EXCEL trial will determine safety and efficacy of drug-eluting stents vs. bypass surgery
7. Oransi Launches Robby Wash High Efficiency Laundry Detergent in U.S. – 10 Ounces Replaces 75 lbs. of Traditional Laundry Detergent
8. Inflammation Molecule May Determine Fat Levels
9. Regenstrief Institute to help improve disability determination through health information technology
10. Childrens sense of threat from parental fighting determines trauma symptoms
11. Robby Wash High Efficiency Laundry Detergent Offers 25% off Coupon – Replaces 75 lbs. of Traditional Laundry Detergent Saving $100 Annually
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/28/2014)... 28, 2014 Home Care Assistance ... for seniors, is proud to welcome Carrie Rose as ... Home Care Assistance, Carrie worked as a caregiver in ... Certified Nursing Assistant in skilled nursing facilities for several ... a trainer with the State of Arizona in the ...
(Date:8/28/2014)... have been adopted by most health agencies to deal ... unnecessary, and may heighten panic and fear among the ... published in The Lancet , and written by ... in Spain, and colleagues. , Ebola virus is ... faeces and other secretions, both direct and indirect, from ...
(Date:8/28/2014)... become increasingly about datahow to gather it, organize ... databases to analyze and share data lies at ... collection, classification, storage, and analysis of biochemical and ... and methods used in bioinformatics have been instrumental ... genetics and genomics. But, in the plant sciences, ...
(Date:8/28/2014)... Worth, FL (PRWEB) August 28, 2014 Following ... on July 21, the FDA issued a warning ... the word about this harmful substance that is readily available ... , In May, high school senior Logan Stiner died from ... investigation of the substance, leading the FDA to issue a ...
(Date:8/28/2014)... researchers place glue directly on the nerve stumps, but ... and allows glue to easily invade the nerve ends. ... to insert the nerve ends into the conduit because ... Xiangdang Liang and co-workers from the General Hospital of ... technique and defined the best parameters for its use ...
Breaking Medicine News(10 mins):Health News:Home Care Assistance Expands Staff to Meet Growing Demand for In-Home Care Services in Scottsdale 2Health News:Home Care Assistance Expands Staff to Meet Growing Demand for In-Home Care Services in Scottsdale 3Health News:The Lancet: Respiratory infection controls being used for ebola patients are unnecessary and may contribute to public panic 2Health News:Together, humans and computers can figure out the plant world 2Health News:Together, humans and computers can figure out the plant world 3Health News:FDA Issues Safety Advisory for Caffeine Powders 2
... Presents Study at International Society of Cellular Therapy ... Cells for Possible Utilization in TransplantationOLDSMAR, Fla., May ... announced results of a new study showing that ... cells from umbilical cord blood expands the number ...
... N.Y., May 5 Nutrition 21, Inc. (Nasdaq: ... help consumers manage blood sugar levels, improve cardiovascular health, enhance ... - prior to the opening of the market - on ... year 2009, ended March 31, 2009. The Company has scheduled ...
... 5 /PRNewswire-Asia/ -- Chindex International, Inc.,("Chindex" or the ... independent American,provider of Western healthcare products and services ... the Company is scheduled to participate in the,Oppenheimer ... 19-21, 2009, at,300 Madison Avenue in New York ...
... Assists Physicians In Identifying Recurrence Risk and the Need ... Clarient, Inc. (Nasdaq: CLRT ... resource for pathologists, oncologists and the pharmaceutical industry, today ... test that helps physicians identify the probability of a ...
... It,s official...Curamin is the natural products industry,s Best ... number-one pain-relieving product, is slated to receive a ... magazine in its upcoming June issue. The ... based on a nationwide survey of health food ...
... medical supplies on a regular basis can save even more with ... many struggle with rising medical costs, the MSD Club membership will ... incontinence and other disposable medical supplies. , ... (PRWEB) ...
Cached Medicine News:Health News:Menstrual Blood Stem Cells May Significantly Increase Yield of Cord Blood Stem Cells 2Health News:Menstrual Blood Stem Cells May Significantly Increase Yield of Cord Blood Stem Cells 3Health News:Menstrual Blood Stem Cells May Significantly Increase Yield of Cord Blood Stem Cells 4Health News:Menstrual Blood Stem Cells May Significantly Increase Yield of Cord Blood Stem Cells 5Health News:Nutrition 21 to Report Third Quarter Fiscal Year 2009 Financial Results on Tuesday, May 12, 2009 2Health News:Chindex International, Inc. Announces May Conference Participation 2Health News:Clarient Launches New Breast Cancer Test 2Health News:Clarient Launches New Breast Cancer Test 3Health News:Clarient Launches New Breast Cancer Test 4Health News:Clarient Launches New Breast Cancer Test 5Health News:Clarient Launches New Breast Cancer Test 6Health News:Curamin Voted Best New Natural Remedy in the Country 2Health News:TheMedicalSupplyDepot.com Announces New Discount Medical Supplies MSD Club 2
(Date:8/28/2014)... , August 28, 2014 ... Market Research "Radiofrequency Identification (RFID) Market (Tags, Readers, Middleware, ... Growth, Trends and Forecast, 2014 - 2020" the global ... billion in 2013 and is expected to grow at ... reach an estimated value of USD 5.3 billion in ...
(Date:8/28/2014)... 28, 2014   Venaxis, Inc.  (Nasdaq:  APPY), an ... FDA clearance for and commercializing its CE Marked ... in identifying children, adolescent, and young adult patients in ... appendicitis, today announced it will present at three upcoming ... Annual Global Investment Conference being held in ...
(Date:8/28/2014)... 2014 Telik, Inc. (OTCQB: TELK), a ... with MabVax Therapeutics, Inc. on July 8, 2014, ... to the development of its lead antibody program ... the Company,s internally developed antibody discovery platform.  These ... antibody based therapeutic and diagnostic products based on ...
Breaking Medicine Technology:Radiofrequency Identification (RFID) Market in Healthcare is Expected to Reach USD 5.3 Billion Globally by 2020: Transparency Market Research 2Radiofrequency Identification (RFID) Market in Healthcare is Expected to Reach USD 5.3 Billion Globally by 2020: Transparency Market Research 3Radiofrequency Identification (RFID) Market in Healthcare is Expected to Reach USD 5.3 Billion Globally by 2020: Transparency Market Research 4Radiofrequency Identification (RFID) Market in Healthcare is Expected to Reach USD 5.3 Billion Globally by 2020: Transparency Market Research 5Venaxis to Present at September Investor Conferences 2Venaxis to Present at September Investor Conferences 3Telik Reports Progress Toward Multiple Early Stage Milestones in the Development of a Novel Antibody-based Therapeutic Agent for Gastrointestinal Cancers 2Telik Reports Progress Toward Multiple Early Stage Milestones in the Development of a Novel Antibody-based Therapeutic Agent for Gastrointestinal Cancers 3Telik Reports Progress Toward Multiple Early Stage Milestones in the Development of a Novel Antibody-based Therapeutic Agent for Gastrointestinal Cancers 4
... traits contribute to risk, of skin cancer; findings will ... May 18 In two papers published,today, deCODE scientists ... the company,s recent findings in the genetics of pigmentation,traits ... of these,common variants also confer risk of two types ...
... Annual Meeting Will Further Demonstrate, the Strength ... CAMBRIDGE, Mass., May 16 Millennium Pharmaceuticals,The Takeda Oncology ... are scheduled to be featured at the 2008 American ... May 30 -,June 3, 2008. The data will highlight ...
Cached Medicine Technology:deCODE Discovers Novel Genetic Links Between Pigmentation Traits and Risk of Skin Cancer 2deCODE Discovers Novel Genetic Links Between Pigmentation Traits and Risk of Skin Cancer 3deCODE Discovers Novel Genetic Links Between Pigmentation Traits and Risk of Skin Cancer 4New Data Support High Complete Remission Rates With VELCADE(R) (Bortezomib) for Injection Based Therapies in Patients With Newly Diagnosed Multiple Myeloma 2New Data Support High Complete Remission Rates With VELCADE(R) (Bortezomib) for Injection Based Therapies in Patients With Newly Diagnosed Multiple Myeloma 3New Data Support High Complete Remission Rates With VELCADE(R) (Bortezomib) for Injection Based Therapies in Patients With Newly Diagnosed Multiple Myeloma 4New Data Support High Complete Remission Rates With VELCADE(R) (Bortezomib) for Injection Based Therapies in Patients With Newly Diagnosed Multiple Myeloma 5New Data Support High Complete Remission Rates With VELCADE(R) (Bortezomib) for Injection Based Therapies in Patients With Newly Diagnosed Multiple Myeloma 6New Data Support High Complete Remission Rates With VELCADE(R) (Bortezomib) for Injection Based Therapies in Patients With Newly Diagnosed Multiple Myeloma 7New Data Support High Complete Remission Rates With VELCADE(R) (Bortezomib) for Injection Based Therapies in Patients With Newly Diagnosed Multiple Myeloma 8
Used for the introduction of catheters, balloons and other vascular devices....
Used to introduce balloon, closed and non-tapered end catheters or other devices for intervention....
Sheath Introducer featuring patented SLIX Valve, rotating collar, kink-resistant cannula and atraumatic tip transitions....
The TAXUS Express Paclitaxel-Eluting Coronary Stent System is indicated for improving luminal diameter for the treatment of de novo lesions = 28 mm in length in native coronary arteries = 2.5 to = 3....
Medicine Products: