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Tag: "rivals" at biology news

Lizards 'shout' against a noisy background

Lizards that signal to rivals with a visual display "shout" to get their point across, UC Davis researchers have found. Male anole lizards signal ownership of their territory by sitting up on a tree trunk, bobbing their heads up and down and extending a colorful throat pouch. Th...

Fish can determine their social rank by observation alone, study finds

... and the ability to infer the relative strength of rivals before engaging them in potentially costly fights ... other dominant males again. Bystanders and rivals The fights were staged in a square tank divided into several compartments. A lone male observer-...

New technique boosts size of proteins that can be analyzed

...its pieces simultaneously. The top-down approach rivals the commonly used "bottom-up" approach, in which proteins are first broken down, or digested, enzymatically into smaller units of five to 20 amino acids. These pieces are then introduced into the mass spectrometer where researchers can match masses o...

New dyslexia theory blames 'noise'

...Psychological Science. Confusion about dyslexia rivals the confusion of dyslexia. Many still think that to have dyslexia means to mix up your letters (one of many possible symptoms having to do with word recognition, directional ability and decoding of symbols). What is known is that dyslexia affects...

Study finds the air rich with bacteria

...ey found a widely varied bacterial population that rivals the diversity found in soil. They also found naturally occurring relatives of microbes that could be used in bioterrorist attacks -- although many of these relatives are harmless. "Before this study, no one had a sense of the diversity of the micr...

Detecting explosives with honeybees

...t the honey bee's phenomenal sense of smell, which rivals that of dogs,?said Haarmann. “But previous attempts to harness and understand this ability were scientifically unproven. With more knowledge, our team thought we could make use of this ability.? The team that Haarmann put together began with re...

Male rivalry increases when females at most fertile, say researchers

...ate the two dominant males within the group become rivals and fight for her attention. Similarly in humans, rated dominance increases when the female is most fertile. What is interesting here is that male behaviour is determined by that of the females; men become more wary of masculine-looking men only wh...

Pregnancy drugs can affect grandkids

...s that males from fragmented habitats perceived as rivals only the close neighbours with which they engaged in counter-singing." "Communication systems of habitat-sensitive species might be used as a behavioural indicator of anthropogenic environmental deterioration. Because of their rapidly evolving cultu...

Bird song changes sound alarm over habitat fragmentation

...s that males from fragmented habitats perceived as rivals only the close neighbours with which they engaged in counter-singing." "Communication systems of habitat-sensitive species might be used as a behavioural indicator of anthropogenic environmental deterioration. Because of their rapidly evolving cultu...

Wild Gorillas Handy with a Stick

...tes used objects for many tasks, from intimidating rivals and predators to taking leaf sponge baths and processing food. Still, the notion that tool use was not the sole province of human intelligence was difficult for some to accept. Though chimps, bonobos, orangutans, and gorillas all use tools in captiv...

DDT-resistant insects have additional genetic advantage that helps resistance spread

...0s have an additional genetic advantage over their rivals that has helped them spread across the globe ever since, according to research published in Current Biology tomorrow (9 August 2005). This discovery overturns current theories that resistance to pesticides burdens insects with a genetic disadvantage...

Compound might defeat African sleeping sickness, clinical trial beginning this month

...s. In some regions, the tsetse fly-borne infection rivals or exceeds the toll AIDS takes. Trypanosomiasis is passed from human to human by tsetse fly bites. It produces fever, lymph nodes inflammation, eventual impairment of the brain and nervous system in its late stage and, if not treated, death. The Wor...

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