Baboons identify each other by status and family
...he troop. Baboon groups contain a number of adult females arranged in a linear dominance rank order. Each female's offspring acquire ranks immediately below those of their mother, with the youngest offspring holding higher ranks than their older siblings. The result is a social structure based simultaneou...Estrogen receptor-a disruption and vasodilation in coronary arteries
...activity experiments. A total of 19 ERKO and 18 WT females were used for immunoblot experiments. The average age of ERKO mice was 16 + 1 wk. In WT mice, the average age was 15 + 1 wk. Within the WT group, 16 mice were ovariectomized. Sixteen ERKO mice were ovariectomized. Experiments were performed beginning...Study finds new mothers are resistant to stress
...are less anxious and more resistant to stress than females without offspring. The researchers presented thei...fferent and unique responses to stress compared to females without reproductive and maternal experience," Shors says. In virgin rats, exposure to stress sever...Male flesh flies high-speed pursuit of females
... the researchers were able to gather the males and females of this species. While male flesh flies have evolved high-resolution regions in their compound eye, for the purpose of catching and mating with females, those high-definition parts are not always necessary, the researchers found. "Some flies look rig...Diet may improve cognition, slow aging, and help protect against cosmic radiation
...PhD, and graduate student Shelley Moore found that females were much more susceptible than males to overeatin...male rats continued to overeat. This suggests that females are more vulnerable than males to over eating a palatable, sweet-tasting diet." In the past, few ani...Familiarity decides if wolf spider loves 'em or eats 'em
... had explored spider behavior with young males and females collected in the field, kept in isolation and then...In the wild, male wolf spiders mature earlier than females and often intermingle. Thus, the pre-adult females often are exposed to sexually mature males. Hebe...Unfaithful songbirds increase offspring fitness
...ra-pair copulations with distantly breeding males, females produce offspring that are more outbred and theref...ften not monogamous in the strict sense. Males and females commonly copulate with more than one partner during a single reproductive event. Therefore, young ra...Genetic basis for gender differences in the liver
...vident physiological differences between males and females resides in the liver. Male and female livers express different subsets of genes, which affect the organ's ability to metabolize certain drugs and hormones. This in turn impacts numerous processes, such as reproduction. While the sexual dimorphism of ...Are the bright colors of some avian eggs signaling female genetic quality to their mates?
... antioxidants to colour their eggs may signal that females can sustain the cost of removing them from metabolism. Egg ground colour has been shown to be heritable in some species and very variable within avian taxa, a typical characteristic of sexually selected traits. The hypothesis can be applied to all a...Pushing marine fish aquaculture forward
...offspring for fish such as southern flounder whose females grow faster and reach sizes two to three times larger than males, and are therefore far more commercially valuable. Methods for inducing fish to spawn so that aquaculture facilities operate at full capacity year round, rather than being constrained ...Findings offer further understanding about growth and development in young male gymnasts
...ng has been found to delay the onset of puberty in females by altering normal hormonal development. This has led to delayed pubertal onset, delayed age at first menarche and failure to develop mature skeletal structure. In males, despite evidence that physical activity can also result in hormonal changes, th...Fruit fly pheromone receptor first ever discovered linked to specific sexual behavior
...xpress the Gr68a receptor spent less time courting females and, as a result, mated significantly less often than normal flies did. Those deficient flies that did mate successfully took twice as long to do so in comparison to intact males. Also, found the researchers, males lacking the Gr68a-expressing neuron...Baboon fathers really do care about their kids
...oons have a bad-dad reputation, but their links to females and immature baboons is rather loose by primate standards. For example, females and males have multiple mating partners, and they do not form permanent bonds with each other. Accor...Male baboons recognize and care for their own offspring
... of the males; that is, they were the offspring of females with whom the males had mated, and -- unrelated j... is behavioral. The male might prefer offspring of females that the male had mated with. And if that's the case, then the male might show at least some prefere...ITA to AMA: Taxing tanning sends wrong health message to teens
... why males get significantly more skin cancer than females and why the melanoma death rate among women aged 20-54 is actually lower now than it was in 1970. The investigators keep us in the dark about why melanoma is more common in people who work indoors than in those who work outdoors and why melanoma most...Geneticists show ripple effects of gene mutations
...their transcriptomes, or all the RNA, of males and females separately. It was important for this study to use a model organism that can be highly inbred so that all individuals are genetically identical. Equally important was the use of sophisticated statistical analyses applied by study co-author Dr. Trudy ...New study provides first linkage of fetal alcohol exposure and enlarged heart
...rs measured heart weight in the adult offspring of females (with the adrenal glands removed) in order to dete...Placental (11-HSD-2) mRNA levels were decreased in females but not males. (3) Adrenalectomy of alcohol-consuming dams reversed the increase in placental weigh...Honeybee gene find ends 150-year search
...athers: They develop from unfertilized eggs, while females grow from fertilized eggs. Later work showed that Dzierzon was right. Male bees have half as many genes (haploid) as females, which get a set of genes from each parent (diploid). About one-fifth of animal species including all ants, bees and wasps us...Discovery may help in war against fire ants
...le to answer," Johnston said. "We've never had the females alive before, we've always had them caught in alcohol traps. With the discovery of the females and using DNA to match the tiny, free-living adult male with the larvae-like female that never leav...Early hominids may have behaved more 'human' than we had thought
...differences between males and females since Homo sapiens evolved but the fossil record is so sparse, they were unsure of whether pre-Homo species showed more of less sexual dimorphism. Modern humans show no more than 15 perce...