Tag: "horns" at biology news

The mouflons of the Kerguelen archipelago

...ombining their efforts, the researchers used hair, horns and tissue to reconstitute the evolution of the genetic diversity of the mouflon population from 1958 to 2003. Through the contribution of Jean-Louis Chapuis, Denis Rale had access to samples from populations living on the Islands between 1988 and 19...

Bigger horns equal better genes

... a greater chance of survival. "The size of the horns reliably advertises the genetic quality of the ibe...a role in determining ibex horn size. The ibex's horns are considered a "secondary sexual trait". Researchers believe the horns help males successfully mat...

Halos and horns: Fixing the 'taste' of diet soda

...aracteristics of the product, it is said to have a horns effect. "For example, when color was added to a ...to think that the beverage had less carbonation (a horns effect)," Lee said. The scientists found that flavor really can make a difference in the acceptanc...

Why are male antlers and horns so large?

Why are male ungulate antlers and horns so large? Darwin, when proposing his theory of evo...ggested that the size of male ungulate antlers and horns may reflect male individual quality, and thereby be used by conspecifics as an honest signal of male...

Why do males and females of some species look so different?

...atic diversity in the development of male-specific horns (which are used in fights over females), Moczek discovered that growth of horns is surprisingly uniform across sexes. Instead, both sexes undergo a second developmental period duri...

Vanishing beetle horns have surprise function

...sting -- one imagines with some frustration -- the horns were merely ornamental. In this month's America...opment, Onthophagus horned beetles use their young horns as a sort of can opener, helping them bust out of thick larval shells. The finding will surprise ...

News tips from the Journal of Neuroscience

...in, was reduced in SBMA neurons and in the ventral horns of SBMA patients, possibly as a result of a disruption in transcription by mutant protein. Consistent with this idea, overexpression of dynactin 1 in cells expressing mutant SBMA reduced toxicity, and oral treatment of SBMA mice with a histone deacet...

Spectacular dinosaur skull comes back to Alberta

...l is two metres long." Styracosaurus had six long horns extending from its neck frill, a smaller horn above each of its eyes and a single horn protruding from its nose. It was a large dinosaur that could reach lengths of five metres and weigh as much as three tonnes. For almost a century, the original sku...

Scientists crack rhino horn riddle

Athens, Ohio (November 6, 2006) -- Rhinoceros horns have long been objects of mythological beliefs. So...opment of the horn's characteristic shape. The horns of most animals have a bony core covered by a thin sheath of keratin, the same substance as hair and...

Northwestern biologists demote Southeast Asia's 'forest ox'

... 1937, the kouprey -- an ox with dramatic, curving horns -- has been an icon of Southeast Asian conservatio... its horns. Galbreath and others showed that these horns were the work of human artisans -- the "khting vor" was a fake. Instead of finding new species, G...

Transmission rates of vCJD

...wn Late Cretaceous dinosaur distinguished by three horns and a massive parietal-squamosal frill. Our analy...sal, epinasal horn, and epoccipitals. Postorbital horns are straight stubs early in ontogeny, curve posteriorly in juveniles, straighten in subadults, and r...

Smallest Triceratops skull ever found provides clues to dinosaur's growth

...stics of their ancestors. In particular, since the horns and frill are present from a very early age, it is...e baby Triceratops confirmed our argument that the horns and frill of the skull likely had another function other than sexual display or competition with riv...

Study in Royal Society journal on world's only horned rodent

...but a rigorous test of adaptation reveals that the horns in this animal were not evolved for digging. The pattern of evolution and the biomechanics of the horns are best explained as adaptations for defense against predation. Increasing body size and the appea...

Stegosaur plates and spikes for looks only, researchers say

... that the weird adornments of many dinosaurs - the horns of triceratops, the helmet-like domes of the pachy...exchange. Padian and Main point out, too, that the horns or antlers of many living animals contain large vessels to supply blood needed for fast growth. None...

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