Tag: "cheating" at biology news

Amoebae control cheating by keeping it in the family

...to keep more selfish strains of D. discoideum from cheating the system, avoiding the stalk and out-reproducing...spores, but in mixed colonies they could thrive by cheating and avoiding service in the stalk. Foster and Mehdiabadi found cheater A spread readily within low-r...

Reap what your ancestors sowed

...its even after the cooperator is dead. Conversely, cheating will have consequences in the future. Standard m...ng, but you pay double tomorrow, because everyones cheating and the costs come home to roost. With environmental pollution, for example, there is a delay in c...

Are all male's liars and cheaters? Yes -- if they're crayfish!

...ishonesty during disputes, but our results suggest cheating may play a more important role in animal communication than previously imagined....

Diversity promotes cooperation among microbes

...xygen that surface colonization provides. However, cheating types rapidly evolve that live in the biofilm but don't produce the polymer. The presence of cheats weakens the biofilm, imperiling its survival by causing it to sink. In the new work, the researchers studied the effect of short-term evolution of d...

Who are we up against? Local vs. global competition influences cooperative behavior in humans

...eration by both players gives greater rewards than cheating by both players. It is well known that cooperation can be favored in this game if players have repeated interactions such a scenario sets up the possibility of reciprocal cooperation. In the new study, students played the Prisoner's Dilemma game in ...

Survival of the selfless - scientists find cheats don't always prosper

...ab-grown yeast populations suggest the benefits of cheating are eventually counterbalanced by the costs. This contradicts classic evolutionary theory, which states that in a competition for common resources the long-term winner will always be the individual acting selfishly rather than the one working as part...

Looks matter to female barn swallows

...The researchers used this widespread phenomenon of cheating to test the factors that may keep a female barn swallow faithful to her mate. Sometimes males even rear an entire nest of illegitimate young. After all pairs had laid their first set of eggs, Safran removed the eggs so that the females would mate aga...

An invasion of cheats: The evolution of worthless nuptial gifts

... are susceptible to the invasion of so-called male cheating behaviour, and it suggests that the evolution of worthless gift-giving may arise though males' sensory exploitation of female preferences for nutritious gifts. Natasha R. LeBas and Leon R. Hockham: "An Invasion of Cheats: The Evolution of Worthless N...

Study in Royal Society journal on first evidence for magnetic field detection in sharks

...e signal copying is perfect, and we show that this cheating strategy of avoiding the cost of toxicity but cashing in on the protection should destabilise warning coloration. We offer a solution, and show that birds offered a mixture of nasty prey and mimics can "sample-and-reject" the truly nasty prey, leavin...

The blotchier the face, the better the wasp

...r, biologists wonder what keeps other animals from cheating by displaying a mark that indicates "I'm great" while actually being just average. Scientists hypothesize that social interactions discourage cheating, but demonstrations of such interactions have been elusive. Tibbetts noticed that for wasps in the ...

Biologists ID molecular block for social 'cheaters'

...coideum. "What we've found is a molecular block to cheating and the genetic mechanism it relies on-- tying cooperative genes tightly with the essential function of reproduction," said paper co-author Joan Strassmann, professor of ecology and evolutionary biology at Rice. "Such a mechanism makes the loss of so...

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(Date:4/18/2014)... wildlife while feeding a world population predicted to ... holistic approach to conservation that considers human-altered landscapes ... Wildlife and the natural habitat that supports it ... world where at least three-quarters of the land ... rest is vulnerable to human-caused impacts such as ...
(Date:4/18/2014)... Seeds that sprout as soon as they,re planted may ... to be more careful. In the wild, a plant whose ... would risk disaster. More than just an insurance policy against ... seed dormancy has long-term advantages too: Plants whose seeds ... to more species, finds in a team of researchers working ...
(Date:4/17/2014)... COLUMBIA, Mo. April 17 In the most densely ... States, forests reflect two centuries of human needs, values ... logging and clearing forests for agriculture and development, have ... today, a U.S. Forest Service study reports. , The ... forest conditions and management needs in the Northern United ...
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