Tufts University biologists unveil more mysteries of fireflies flash
...y has translated what male fireflies are saying to females when they flash their lights - and it looks like t...ailability with carefully timed light flashes, and females on the ground flash back if they're interested. "Previous firefly research focused on flash pattern ...Bright beaks provide honest look at male immune system, Science study says
... information about individual immune systems. When females choose bright beaks, they select healthy males. A ...ddest beaks received the most sexual interest from females and had the healthiest immune systems. Carotenoids are the red and yellow pigments that color the be......of the scientific journal Nature. "The ability of females to count only their own eggs in a mixture of eggs ... out that in most cases, the parasitism is done by females who have their own nests, and often it's the next-door neighbor, so by comparing the eggs in nearby ...As harmful as osteoporosis but less well known - New research better explains sarcopenia
...fferences in continuous variable between males and females were tested with the Student's t-test. Pearson product-moment correlations were calculated to test associations among variables. Results Study participants were slightly overweight with a mainly central body fat distribution. Women had lower plasma ...Italian research reveals a new twist in the battle of the sexes
...t male foetuses and newborns are more fragile than females by allowing significantly more boys to be conceive...optimal. Evidence that males are more fragile than females and that fewer males are conceived in sub-optimal conditions is not new. What is new in research pub...Redheaded women respond better to painkilling drug
...hair and fair skin may also be responsible for how females respond to painkillers, according to a study condu...c genetic circuitry that governs the way males and females respond to pain. More generally, Mogil has been examining the genetic and environmental influences ...Indiscriminate nursing in communal breeders: A role for genomic imprinting
In several communally nesting mammal species, females indiscriminately nurse each others' offspring. Pre...g. In the absence of lifetime monogamy, males and females have conflicting interests over the amount of maternal investment in offspring, with males favouring...Crash in male saiga antelope numbers drives species closer to extinction
...ere are not enough male antelopes to mate with the females - despite the male's polygynous practice of mainta...l Chinese medicine, has led to a gender bias where females outnumber males by a ratio of 100:1. Dr E.J Milner-Gulland, lead author of the study, based in the ...Scientists' transgenic chicken aids embryo research
... lacZ gene. These two males were mated with normal females and 50 percent of their offspring contained the lacZ gene as expected. Further, the second-generation chickens expressed beta-galactosidase, and the lacZ gene is apparently stable from generation to generation. Petitte says that other transgenic chic...Leatherback sea turtles careening towards extinction
...ke University. "There are probably fewer than 1500 females nesting throughout the Pacific Rim." Global indust...c rookeries where the number of individual nesting females has declined by more than 95% over the past 22 years to about 900 in Indonesia, 45 in Mexico, 55 in ...Sex and gender scientists explore a revolution in evolution
... he does pass on his genes. Darwin postulated that females are ''coy,'' mating rarely and choosing their mate... unlike eggs, sperm are plentiful and small. Plus, females usually do most of the work to raise the offspring. Sexual selection theory helped Darwin explain ma...Why we are what we eat: New links between our biology and food choices
...g to Bartoshuk. One puzzle yet to be solved is why females tend to have the opposite response, liking high fat food less after becoming more sensitive to fat. Bartoshuk mentioned that her colleague, Valerie Duffy, has found that supertasters are at less risk for cardiovascular disease, likely because of thei...Phase III, 48-Wk NEAT study results comparing GW433908 to Nelfinavir presented today
...0 cells/mm3 at baseline. Gender diversity -- with females representing 31 percent of the patient population. Ethnic diversity -- including a high proportion of Hispanic patients (44 percent) and patients of African descent (32 percent). The investigational PI, 908, is the calcium phosphate ester pro-drug...Genetics, genes and intelligence
...the authors examined 358 adult males and 470 adult females for a total of 828 adults. The subjects were the parents of twins from the Minnesota Twin and Family Study, a long-term study of the genetics and environmental factors in substance abuse. All subjects in the CHRM2 study were of Caucasian ancestry. Al...Researchers record first 'pheromone images' in brains of mice
...ital information about the sexual receptiveness of females and the dominance hierarchy in males, among other ...ant or non-dominant. In addition, males respond to females who are in estrus because they smell differently. In essence, said Katz, these pheromonal cues help ...Hikers may disturb breeding spotted owls
...iking primarily affected the female owls: notably, females spent nearly 60% less time on prey-handling activities such as feeding their young, and a third less time on daytime maintenance activities such as tending the nest, and preening themselves and their young. Preening is important to birds' health in p...Male groundhogs hibernate less to visit the ladies
...ibernation seasons of about 106 days compared with females at about 117 days. The timing of hibernation activities did not vary significantly from year to year. Although males "tended" to immerge later and emerge earlier than females, no significant difference was observed. "It would appear that the ear...Prehistoric tusks point to earliest fossil evidence of differences between sexes
...s. The tusks were not used for feeding because the females did not have them nor were they used for digging because the ends did not show signs of wear. It appears the tusks became longer, wider and thicker as the animals aged and extended well below the jaw line; those lost, possibly in combat, were never r...Female hormones found to protect against harmful effects of fructose
...sex hormones in the response to a fructose diet in females and examined vascular responses to insulin. The Study The authors of "Female Rats are Protected Against Fructose-Induced Changes in Metabolism and Blood Pressure," are Denise Galipeau and John H. McNeill Division of Pharmacology and Toxicology, Uni...Prehistoric NW Indians hunted fur seals of sustainable basis
...re males tend to remain in the North Pacific while females and juveniles migrate perhaps as far south as Baja California. However, in 1968 a rookery was established naturally on San Miguel Island off of Santa Barbara, Calif. Russians began commercial hunting of the animals in the late 1700s and a large col...