Galling behaviour; Altruistic aphids.

From: The Economist (US) | Date: May 10, 2003 | Copyright information

Aphids will protect their colonies at the cost of their own lives

APHIDS are not, you might think, the sort of creatures that would lay down their lives for their friends. But you would be wrong. A study just published in the Proceedings of the Royal Society by Utako Kurosu, of Tokyo University of Agriculture, and her colleagues shows that aphids are, indeed, capable of making the supreme sacrifice.

The aphids in question are not the common or garden greenfly that infest people's roses, but rather a species called Nipponaphis monzei that hides itself away in large galls ...

Read all of this article with a FREE trial to HighBeam Research

Related newspaper, magazine, and trade journal articles from HighBeam Research

(Including press releases, facts, information, and biographies)

Body weight set-points: Determination and adjustment
; Body Weight Set-Points: Determination and Adjustment1...Hirvonen ABSTRACT It is proposed that body weight, like body water and body temperature...physiologically regulated. In the case of body weight, coordinated adjustments in both the...
The effect of a change in body weight on running and responding reinforced by the opportunity to run.
; ...shown that activity increases as body weight decreases with food deprivation...percentage of estimated normal body weight after rats had lost 10% to 15...weight. The correlation between body weight and revolutions between 60% and...
Tipping the social scales: body weight in dating and marriage.
; In our culture, body weight has shifted from a private, personal concern to a public...sociologist Jeffery Sobal is examining how attitudes about body Weight, and body Weight itself, change throughout the life course, particularly in...
Economic Factors and Body Weight: An Empirical Analysis
; ...effects of changes in economic factors on body weight by constructing a utility theoretic...estimated by combining data on individuals' body weight, demographic and physical activity information...price of food at home could decrease body weight, a finding which has important ...
The influence of resource availability on preferences for human body weight and non-human objects.
; ...availability to influence preferences for human body weight, which may also extend to non-human...previous studies of preferences for human body weight using a new set of line drawings. The...a preference for a slightly heavier body weight. We then designed three studies that...
The effect of body weight on adolescent academic performance.
; ...evidence of a negative relationship between body weight and wages for white females, even after controlling for the endogeneity of body weight. If obesity causes white females' wages...human capital accumulation. If increased body weight reduces the academic performance of...
Hydroxycitrate has long-term effects on feeding behavior, body weight regain and metabolism after body weight loss in male rats
; ...Has Long-Term Effects on Feeding Behavior, Body Weight Regain and Metabolism after Body Weight Loss in Male Rats1,2 ABSTRACT We examined...hydroxycitrate (HCA) on food intake, meal patterns, body weight regain and energy conversion ratio as well...
Dosage of intrathecal pethidine and body weight
; ...between their subarachnoid spread and the body weight of the patients. There is no reason...direct dose-effect relationship based on body weight has been freely made by many authors...dose in accordance with the patient's body weight needs to be established. Therefore...
Signaling System for Body Weight
; ...that helps to control food intake and body weight and that could lead to the development...for leptin, a hormone known to lower body weight by acting on the central nervous system...discovered in 1994 when it was linked with body weight and appetite. Studies have shown high...
New combined oral contraceptive containing drospirenone and changes in body weight during six usage cycles
; ...study was to observe the changes in body weight during ? usage cycles of the new OG...women between 15 and 46, changes in body weight, I)MI and girt measurement were observed...During 6 usage cycles of Yadine, the mean body weight dropped from 60,5 to 59,6 kg, the BMI...