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Tag: "competition" at biology news

Philandering female felines forgo fidelity

...etahs have always existed in low densities, due to competition from larger predators such as the lion and hyena. “Our study shows that more fathers are contributing to the next generation than we thought,” added Durant. “This is good news for cheetahs, and a reminder that future conservation strategies need to e...

Early exposure to indoor fungus molecules may protect infants against future allergies

... destroy them all. "This eliminates the natural competition among bacteria and fungi, so the surviving microbes are often the infectious ones that can develop resistance to drugs designed to eliminate them." Iossifova says further research is needed to determine how early microbial exposures affect the de...

Global survey of lizards reveals greater abundance of animals on islands than on mainland ecosystems

...mited areas and isolation can reduce predation and competition pressures. As a result, island animals were able to reach exceptionally high densities. In their study, Jetz and Buckley confirmed that reduced numbers of predators and competitors accompany high lizard densities on islands across the world. The...

In young mice, gregariousness seems to reside in the genes

...c gospel, social behavior is dictated primarily by competition for resources such as food, territory and reproduction. That may well be true for many adult animals, but in a groundbreaking study researchers from the University of Wisconsin-Madison have found evidence that social interactions among young mice re...

Male owls pitch their hoots to advertise body weight to competitors

...ication as a means of assessment, both during male competition and during mate choice," says Loïc Hardouin who recently completed a PhD on acoustic communication and territoriality in owls. "The next step is to see whether females use these quality cues when they choose their mating partner." "The vocal communic...

New report: Explosive growth changes salmon industry

..., the first to take a comprehensive look at market competition between wild and farmed salmon, sheds new light on the contentious and complex issues surrounding farmed and wild salmon. The Great Salmon Run: Competition Between Wild and Farmed Salmon, released by TRAFFIC, the wildlife trade monitoring network o...

The penalty of having a sister -- why sibling sex matters for male saiga antelopes

...s mate with many females and face strong male-male competition during short mating seasons. This means that size...fect on male reproductive fitness in species where competition amongst males for mates is very high." The saiga antelope provides scientists with an ideal oppor...

Female chimps keep the bullies at bay

... fewer females in estrous at the same time, mating competition between males intensifies. As a result, there is an increased probability that high-ranking males, with desirable social and physical attributes, will mate with the fertile females. These sought-after characteristics could be inherited by their off...

Study finds surfing safer than soccer

...ion of every acute surfing injury sustained during competition was recorded, as well as wave size, mechanism of i...ere found to be less common among surfers during a competition makes sense since it's a more controlled environment compared to a recreational surfing-type atmosph...

Trojan horse strategy defeats drug-resistant bacteria

...one of the body's own defense mechanisms. "The competition for iron is critical in the struggle between bacteria and host," explained the study's senior author, Pradeep Singh, associate professor of medicine and microbiology at the UW. "The body has potent defense mechanisms to keep iron away from infecting ...

Some caterpillers just don't want to grow up

...ists conclude that low added mortality and intense competition among caterpillars in the nest are a prerequisite ...nnot explain it on their own. In contrast, sibling competition and "segregation" ?cohorts from both years do not always compete because infected ant colonies avoid...

Birth rate, competition are major players in hominid extinctions

...or early hominids, low birth numbers combined with competition often spelled extinction. "The lineages of primat...hey did begin fishing." Jablonski believes that competition from modern humans was already too strong. The environment was marginal and modern humans were alre...

DNA analysis reveals rapid population shift among Pleistocene cave bears

...st that human influence in the form of hunting and competition for sheltering caves may represent a plausible explanation for the disruption in the cave bear population, creating an opportunity for the infiltration by a neighboring cave bear group. The authors note that though the new bears successfully colonize...

Living with water scarcity -- world must act now

...y ?can reduce future demand for water, thus easing competition for water and environmental degradation. A 35% increase in water productivity could reduce additional crop water needs from 80% to 20% by 2050. "While getting more crop, fish, meat and milk per drop is important for the environment, getting more va...

Sequencing of the oyster mushroom genome

... from amongst more than 400 entered for the annual competition of the Joint Genome Institute (JGI) of the United States Department of Energy's Science Office, is one of just over 40 which have the go-ahead, one of the seven coordinated by a European body and the only one led by a Spanish person. The oyster mu...

Recycling technology

...ry at the University of York have won a major DTI competition to investigate ways of extracting and recycling liquid crystals from waste LCD devices. They are part of a consortium of nine partners and supported by the Resource Efficiency Knowledge Transfer Network (KTN) and the Displays and Lighting Knowledge ...

Scientist's persistence sheds light on marine science riddle

...tors of a species often don't reach an island, but competition and predation in the deep sea can be intense. A lot more study needs to be done on the relative importance of these factors, but clearly resource limitation is a key factor in the evolution of size." ...

Wild tigers need cat food

...al poaching, and prey depletion which may increase competition between large carnivores. "The good news is that given the chance, tigers can replenish their numbers; the bad news is that they are not being given that chance in many parts of their range," said WCS’s noted big-cat researcher Dr. Alan Rabinowitz...

Tiny bones rewrite textbooks

...c bird fauna had evolved there because they had no competition from land mammals. An international team led by Trevor Worthy, of the University of Adelaide, Alan Tennyson, of the Museum of New Zealand Te Papa Tongarewa, and Mike Archer, of the University of New South Wales, note that New Zealand separated fro...

HIV exploits competition among T-cells

A new HIV study shows how competition among the human immune system's T cells allows the...of HIV infection by incorporating a key component: competition among T cells. The model includes two forms of competition. The first form leads to a phenomenon kno...

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