Tag: "kin" at biology news
In the mating game, male wild turkeys benefit even when they don't get the girl
... one case of the general evolutionary principle of kin
selection, which posits that individuals may engag... of drawing the attention of a predator. "Although kin
selection is widely invoked as an explanation for cooperation, obtaining the fitness data necessary ...
Can our genes tell the story of our divergence?
...red a knack for abstract thought while our next of kin
learned to use tools, and developed the skills to construct tree-bound nests high above the forest floor. We differ by just a tad over 1% at the DNA sequence level, yet scientists predict that both species should harbor genetic footprints of our dive...
Helping in a selfish world
...ed the evolution of co-operation using the idea of kin
selection. Help to relatives (who share your genes) makes sense if it means your relative will have more children who will carry your genes into the next generation. Therefore, relatives are expected to help more. However, in a study published toda...
New study shows animal family tree looking bushy in places
... family trees for plants, animals, fungi and their kin
would be resolved with genetic precision. And while molecular methods have had enormous success in ordering some branches in the tree of life -- mammals, for example -- and have played a critical role in refining and correcting trees constructed on ...
The greenbeards have blue throats in a breakthrough study of the evolution of altruistic behavior
...ot completely ruled out the confounding effects of kin
selection," he said. "We establish that the greenbeard of the side-blotched lizard is not confounded by the effects of kin-helping behavior." Interestingly, not all blue-throated males possess the complete set of genes required for greenbeard altruis...
How cooperation can evolve in a cheater's world
... models assume more complicated mechanisms such as kin
selection, punishment and reciprocity. Some of those mechanisms require cognition, so those models can only be applied to humans and higher-order animals....
Tight-knit family: Even microbes favor their own kin
...zees, ground squirrels or paper wasps and because kin
recognition can strongly influence cooperative beh...ile scientists have repeatedly documented cases of kin
recognition, the Rice study is among the first to document the more sophisticated trait of kin
Sniffing out relatives, bluegill sunfish use self-referencing to recognize kin
...romiscuous and thus that nest-mates are not always kin
(that is, full siblings). A so-called self-referen...ated the possibility that such cases might involve kin
recognition based on learning early in development. In the new work, the researchers studied the ab...
Honey bee chemoreceptors found for smell and taste
...ory abilities, including perception of pheromones, kin
recognition signals, and social communication within the hive. Honey bees also use odor recognition for finding food. "Foraging worker bees might encounter a bewildering number of flowers to choose from, but they can discriminate between them using s...
Secrets revealed in sequencing of honey bee genome
...ory abilities, including perception of pheromones, kin
recognition signals, and social communication within the hive. A large number of odorant receptors also allows the bees to find food and communicate the location of it to other bees. Researchers found clues for social cues, a form of bee pressure th...
Insight into evolution of adaptive immunity boosted by sea urchin genome sequencing
Tampa, FL (Nov. 10, 2006) -- We're not close kin
to the sea urchin, but genetically speaking we may have more in common than we think. The decoding of the sea urchin genome featured in the Nov. 10 issue of the journal Science is accompanied by a companion article written by scientists from the U...
Invasive ants territorial when neighbors are not kin
...a better understanding of how the ants distinguish kin
from non-kin, and the mechanisms that prevent gene flow between colonies, might lead to more effective ways to control the ants. That would be good news for anyone surrounded by the pervasive creatures. "When people saw that the ants from differ...
Why do some queen bees eat their worker bee's eggs?
... his "relatedness hypothesis", a major landmark in kin
selection theory. His hypothesis was that worker bees, wasps and ants do not reproduce because most workers are half sisters. Instead the workers favor the queen's male progeny, since she has mated with multiple males, ensuring variation in the speci...
Science's breakthrough of the year -- The Poincar Theorem
... big splash in 2006. The fish is the closest known kin
to limbed vertebrates and provides a window into how life left the oceans and ventured onto terra firma. The Science of Invisibility: Though it looks nothing like Harry Potters magical cape, the invisibility "cloak" that scientists developed this y...
The hitchhiker's guide to altruism -- Study explains how costly traits evolve
...ed by natural selection. Conversely, the theory of kin
selection suggests that costly traits can be favor... governed by the same equations. This reveals that kin
selection can be seen as a special form of genetic hitchhiking, explain Gardner and his coauthors St...
For some species, an upside to inbreeding
Although breeding between close kin
is thought to be generally unfavorable from an evo...individuals preferred mating with unfamiliar close kin
rather than non-kin. Because parental work is energetically costly, and kinship generally favors coo...
'Wingman' -- how buddies help alpha males get the girl
...cooperation occurs in close-knit family groups and kin
selection explains apparently selfless behavior. Not so for the lance-tailed manakin. Males of this little tropical bird cooperate in spectacular courtship displays with unrelated partners, and the benefits of lending a helping wing may only come yea...
Tropical plants go with the flow ... of nitrogen
...pear to be far more adaptable than their temperate kin
when it comes to their nitrogen needs. A team of researchers* has found that, when confronted with shifts in nitrogen availability, these plants simply "flip a switch" and use whatever is handy. "When it comes to nitrogen, the tropical plants we st...
Mule deer moms rescue other fawns
...efies traditional explanations that parental care, kin
selection or reciprocity play a part in the defence of fawns other than their own. But while the study's findings seem to point to mule deer as superior mothers, the motivation for looking out for other fawns is likely based not on altruism but on si...
Competition, loss of selfishness mark shift to supersociety
...target of selection shifts from the individual and kin
to group selection. Such a nested tug-of-war model, he says, might also be applied equally well to the analysis of the evolution of other animal societies and give insight into the evolution of cooperation in non-human and human primates, in additi...