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Offspring in Biological News

Spread your sperm the smart way

... per mating to maximise their chances of producing offspring across a range of females, according to a new ... of resources into each mating he will get more offspring per mating, but at the expense of fewer matings. ... fertility per mating, it maximises the number of offspring he sires overall. Less attractive males secure ...

Key to evolutionary fitness: Cut the calories

... while food was plentiful and produce as many offspring as this would allow them to. However, recent ... due to active control of maternal investment in offspring in order to maintain long-term reproductive ... when their energy reserves are low or when their offspring are kept in cooler temperatures, Brown hares are ...

Bisphenol A exposure in pregnant mice permanently changes DNA of offspring

... known to cause a fertility defect in the mother's offspring in animal studies, and now researchers have found ... the scientists analyzed the uterus of female offspring and extracted DNA. They found that BPA ... The permanent DNA changes in the BPA-exposed offspring were not apparent in ...

Hatchery fish may hurt efforts to sustain wild salmon runs

... if they survive and reproduce in the wild, their offspring will also be significantly less successful at ... to survive and reproduce of the wild-born offspring of hatchery fish means that adding hatchery fish ... study found that a fish born in the wild as the offspring of two hatchery-reared steelhead averaged only 37 ...

The importance of being helpful -- Cooperative cichlids boost their own reproductive success

... pair by helping to raise the dominant pair's offspring and this has been shown to occur among ... (Neolamprologus pulcher) often help to raise the offspring of unrelated dominant females (a form of ... in exchange for the care they provided for the offspring of dominant pairsa behaviour that enhanced their ...

Mothers give interloper's offspring a head start in life

... paternity in which the interloper's 'extra pair' offspring often outperform their half brothers and sisters. While the superiority of these extra-pair offspring has generally been attributed to improved ... more to do with mothers giving these 'extra pair' offspring a head start. The team from the Universities ...

Researchers take first look at the genetic dynamics of inbreeding depression

... But the interaction of parental alleles in their offspring can be quite complex. Sometimes an allele causes ... When closely related individuals mate, their offspring are likely to end up with identical alleles for ... so more genetic disorders arise. Similarly, offspring that inherit two identical alleles for some ...

Lincoln Park Zoo scientists awarded National Institutes of Health grant

... relates to maternal behavior and ultimately to offspring stress, health and development. Chimpanzees ... relationship is critical to how well offspring survive and reproduce later in life. The ... us to fully investigate the relationship between offspring stress and health." By combining long-term and ...

Social support during breast-feeding helps humans have more children

... those that give birth to litters of multiple offspring that grow rapidly. These species, such as ... that loss. Producing dilute milk for a single offspring requires a smaller increase in energy, giving ... much on their own. Nobody feeds them or their offspring during lactation," Piperata said. Piperata ...

February 2009 highlights from Biology of Reproduction

... 2008; DOI: 10.1095/biolreprod.108.072736 offspring of male geezers: a new wrinkle. Although ... until late in life, evidence of hazards to offspring has emerged in human and animal models. Two ... data of deleterious effects on the offspring of aged male mice mated to females of prime ...

Mothers pass on disease clues to offspring

... the immediate environment potentially determining offspring disease resistance and social dominance. The ... on foetal and new-born development. The offspring of the dams exposed to infected neighbours were ... In the final part of the experiment, all offspring were infected with B microti to see if the ...

CSHL scientists discover a new way in which epigenetic information is inherited

... Hereditary information flows from parents to offspring not just through DNA but also through the ... information is known to be passed from parent to offspring is through the pattern of chemical "caps" added ... passes on the trait of fertility from mother to offspring in fruit flies. A new mechanism of ...

Two from one: Pitt research maps out evolution of genders from hermaphroditic ancestors

... and the male inclination to sire as many offspring as possible. For the current study, Ashman and ... and fertility in males and the other in females. offspring that inherit both fertility versions are ... with genes that favor the production of fertile offspring will be more successful.) When inbreeding ...

Exposing chicks to maternal stress leads to long-term reproductive success

... Do mothers purposely expose their offspring to their own stress? If so, why? The question ... development can have negative impacts on offspring following birth. To examine why a stressed mother ... Oliver Love and Tony Williams examined how offspring exposure to the maternally-derived stress hormone ...

New research suggests diabetes transmitted from parents to children

... diet during pregnancy and/or suckling, their offspring also had a greater frequency of diabetes development, even though the offspring were given a moderate-fat diet. These mice were ... mated with healthy mice, and the next generation offspring (grandchildren of the original high-fat fed ...

Children born after donor insemination should be told as soon as possible about their conception

... study is one of the first to compare the views of offspring of donor insemination told of their origins ... The researchers recruited a sample of 165 offspring conceived by sperm donation through the Donor ... a US-based, worldwide website that enables donor offspring to search for their donors and their donor ...

Diet prior to pregnancy determines sheep's gender

... when it comes to influencing the sex of the offspring "Our study ruled out body condition, ewe weight, ... females, it has been theorised that having male offspring would be of genetic advantage to a very healthy, ... provide a means of controlling the sex ratio of offspring born to a herd or flock." ...

Mice mothers devote energies to offspring when life is threatened

... and organismal biology, studied the size of offspring for both infected and healthy mice and found that ... had been infected with a parasite produced larger offspring than healthy females. This finding was ... born to both infected and healthy mothers, the offspring were tagged and weighed. The results show ...

Healthy parents provide clues to survival of young haddock on Georges Bank

... into better physical shape to reproduce healthy offspring with a higher chance of survival, says Friedland, ... larger and potentially better-conditioned offspring with a higher probability of survival to ... cycle. The bottom line: the number and quality of offspring is more important than the external environmental ...

How what and how much we eat (and drink) affects our risk of cancer

... acid supplementation on colorectal cancer in the offspring in a chemical carcinogenic rodent model: Abstract ... in utero, but not postnatally, may protect offspring from developing colorectal cancer. This study ... significantly decreased the risk of offspring developing colorectal cancer while postnatal ...

Royal corruption is rife in the ant world

... ants are able to cheat the system, ensuring their offspring become reproductive queens rather than sterile ... of leaf-cutting ants and discovered that the offspring of some fathers are more likely to become queens ... royal genes have evolved to somehow spread their offspring around more colonies and so escape detection. The ...

Mom's obesity during conception phase may set the stage for offspring's obesity risk

... times a week and all rats gave birth naturally. offspring born to lean or obese rats were raised by ... was limited only during gestation. The male offspring from each group were weaned from the surrogate ... the following: at birth, the weight of the offspring from both groups was similar. The number and size ...

Age increases chance of success as two-timer

... tests on more than 200 breeding couples and their offspring in 2000 and 2001,' he explains. With the aid of a ... life and Mum and Dad take care of their joint offspring together. But are the young really always the offspring of the father who is taking care of the brood" ...

Species still have more viable offspring if they can choose their best mate

... ways to compensate that increase the chance their offspring will survive. The study, just published in the ... ideal circumstances. Its always better for offspring if parents can mate with preferred partners, but ... predicament that could improve the chances that offspring could survive and perhaps even flourish. Just ...

Mother's little helpers

... In many animal species, parents caring for their offspring are assisted by so-called helpers, adults that ... decrease the amount of food they provide to offspring when helpers are present, the additional supply ... However, research has shown that these offspring who receive additional food do not appear to gain ...

Clones on task serve greater good, evolutionary study shows

... that produce scads of genetically identical offspring like microbes, plants or water fleas. These ... in the zone. The group studied different cloned offspring of the Arabadopsis, a plant of the mustard family ... test genetic questions. Arabadopsis can have many offspring that are genetically identical. Yet, just like ...

Battle of the sexes benefits offspring, says research

... University of Debrecen (Hungary). Dr Harrison explained: "Caring for offspring is essential for their survival in many species, but it is also very ... more offspring, so parents face a trade-off between caring for current offspring and creating future offspring. "This creates a conflict of interest ...

ICSI or IVF: Babies born from frozen embryos do just as well

... with the assumption that the unmedicated cycles would generate better offspring outcomes. Interestingly, we did not see any clear difference in neonatal ... to cryopreservation and medications or both did not significantly impair offspring outcome." The malformations ranged from heart defects to defects caused ...

Mate selection: How does she know he'll take care of the kids?

... be honest and they may devote more of their energy to caring for their offspring than to being attractive. The idea that males showcase their best ... examines the reliability of males' mating signals when they must care for offspring an aspect that was missing in earlier studies. There are many species ...

Biologists devise unifying framework to explain evolutionary puzzles

... true to their mate for life. Yet, in most bird species, some nests contain offspring of individuals other than the one's tending the nest. Why would a bird invest in another bird's offspring when genetically such parenting would seem to provide no evolutionary ...

Biologists consider unifying framework to explain evolutionary puzzles

... true to their mate for life. Yet, in most bird species, some nests contain offspring of individuals other than the one's tending the nest. Why would a bird invest in another bird's offspring when genetically such parenting would seem to provide no evolutionary ...

Research team finds important role for junk DNA

... set comes in the form of RNA that is passed briefly from parent to offspring and these maternal RNAs provide templates for the rearrangement process," ... copies itself ad nauseum, selfish DNA replicates and passes from parent to offspring for the sole benefit of the DNA itself. The present study suggests that ...

You don't call, you don't write: Connectivity in marine fish populations

... juveniles as far away as 35 km from their natal lagoons. These wayward offspring play an important role in the ecosystem, contributing to the resilience of ... to their parents, the literal apple not falling far from the tree. These offspring also play a key role in population dynamics, sustaining the populations in ...

Therapeutic cloning gets a boost with new research findings

... stringent epigenetic programming to avoid mutations than germ cells, but offspring produced from somatic cells by cloning have mutation rates similar to those in offspring produced by natural reproduction, suggesting that the epigenome of an ...

Exposure to insecticide may play role in obesity epidemic among some women

... of obesity and potentially help us create prenatal tests to show which offspring are at higher risks," she said. The mothers who were studied are part ... aged 20 to 50 years old. "These findings not only apply to the offspring of women in our cohort but to any woman who has been exposed to high ...

How Volvox got its groove

... Genetic control of cell number is one of those, he said. "If my number of offspring is fixed at four, now there's no reason for me to cheat. I can't have eight offspring when everyone else is having only four." Herron is now studying ...

Older killer whales make the best mothers

... because of maternal experience, or they may allocate more effort to their offspring relative to younger females". Killer whales are extremely long lived, ... can produce their first calf as early as age 10, and continue to produce offspring until their early 40s. ...

JCI online early table of contents: Jan. 19, 2009

... and the University of Colorado School of Medicine, Aurora, have found the offspring of both lean and obese nonhuman primate mothers chronically consuming a ... were reverted to a low-fat diet during a subsequent pregnancy, this second offspring exhibited fewer signs of NAFLD. The team, led by Kevin Grove and Jacob ...

Quiet bison sire more calves than louder rivals

... mating season, the quietest bulls score the most mates and sire the most offspring while studs with the loudest bellows see the least action, according to a ... least successful bulls those with the lowest number of copulations and offspring bellowed at least 50 percent louder than their more successful rivals, ...

Eating eggs when pregnant affects breast cancer in offspring

... choline at all, or extra choline. Then the researchers treated the female offspring with a chemical that causes cancer of the mammary gland (breast cancer). ... guidelines for pregnant women that ensure the good health of their offspring well into old age." The researchers also found multiple genetic and ...
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