Breaking News
January 17, 2019 - Pre-injury exercise reduces damage to both muscles and nerves, study finds
January 17, 2019 - Minimizing Antibody Size to Maximize Research Potential
January 17, 2019 - Research finds large genome in tiny forest defoliator
January 17, 2019 - Technology helps reduce the yearning for unhealthy food
January 17, 2019 - New Drug Application for Insomnia Disorder Treatment Lemborexant Submitted in the United States
January 17, 2019 - What you should know about teeth whitening
January 17, 2019 - Why Older Adults Should Eat More Protein (And Not Overdo Protein Shakes)
January 17, 2019 - Colorectal cancer mortality rates predicted to increase globally
January 17, 2019 - Scientists discover mutational signatures of tumor hypoxia
January 17, 2019 - New evidence shows how fever alters immune cells
January 17, 2019 - Researchers find new class of blood pressure-regulating peptides in vampire bat venom
January 17, 2019 - Promega to exhibit new Maxwell RSC48 platform at 2019 Festival of Genomics
January 17, 2019 - Study pinpoints immune cells that could be key to tackling hypertension
January 17, 2019 - Couples Intervention May Aid Partners of Diabetes Patients
January 17, 2019 - Your weight history may predict your heart failure risk
January 17, 2019 - Explore a cornucopia of accomplishments in prematurity research
January 17, 2019 - New study identifies four characteristics that predict severity of postpartum depression
January 17, 2019 - New, scalpel-free treatment for reducing Parkinson’s tremor gets FDA approval
January 17, 2019 - Neurobiologists uncover key component of how the human brain marks time
January 17, 2019 - LifeTime receives fund to develop a plan to embed its vision for healthier future
January 17, 2019 - WTC first responders at higher risk for head and neck cancers, study finds
January 17, 2019 - New NSF funded study may help physicians decrease brain injury deaths
January 17, 2019 - Ham bones contain peptides that could have cardioprotective effects
January 17, 2019 - Research finds how Candida albicans adapt to low oxygen levels to cause infection
January 17, 2019 - Cobra Biologics announces appointment of Dr Darrell Sleep as Director of Innovation
January 17, 2019 - Cellular protein that interacts with viruses appears to enable infection process of Zika virus
January 17, 2019 - Opioids Now More Deadly for Americans Than Traffic Accidents
January 17, 2019 - Women who start periods early are at greater risk of cardiovascular problems
January 17, 2019 - The brain-circuitry clash that keeps you from diving into that plate of ribs when you’re dining with royalty
January 17, 2019 - Poo transplant can successfully treat patients with ulcerative colitis
January 17, 2019 - Study suggests key role for glial cells in Parkinson’s disease
January 17, 2019 - Educational videos in clinical settings increase HPV vaccination rates among adolescents
January 17, 2019 - Better understanding of aggressive brain tumour
January 17, 2019 - Why is life expectancy in the U.S. going down? A Q&A
January 17, 2019 - The Electronics Industry Sees Money In Your Health
January 17, 2019 - Hypertension drug may improve effectiveness of ovarian cancer treatment
January 17, 2019 - Scientists reveal key mechanism in worms that controls cell’s response to stress
January 17, 2019 - How Patch Clamp Technology Can Benefit Ion Channel Research
January 16, 2019 - Researchers cultivate organoids that perfectly mimic blood vessels
January 16, 2019 - Sound Pharmaceuticals Advances Phase 2 Hearing Loss Clinical Trial in Cystic Fibrosis
January 16, 2019 - Unraveling the genetic causes of skin cancer
January 16, 2019 - Higher percentages of saturated fat in low-carb diets may not harm cholesterol levels, new analysis suggests
January 16, 2019 - Using bottled or tap water impacts health benefits of green tea
January 16, 2019 - Best trained alert dogs have potential to improve Type 1 diabetes patients’ quality of life
January 16, 2019 - States with lower incidence of melanoma have higher mortality rates
January 16, 2019 - Pollution on the London Underground found to be dangerously high
January 16, 2019 - Breast cancer cells in mice coaxed to turn into harmless fat cells
January 16, 2019 - Study connects the genetic background of autistic spectrum disorders with stem cell dysfunction
January 16, 2019 - When activated, ‘social’ brain circuits inhibit feeding behavior in mice | News Center
January 16, 2019 - How Exercise May Help Keep Our Memory Sharp
January 16, 2019 - Researchers identify a key regulator that stops excessive inflammation
January 16, 2019 - TGF-beta signaling pathway in uterine cells protects against cancer
January 16, 2019 - MD Anderson Cancer Center collaborates with Dragonfly for new immunotherapy drug clinical trials
January 16, 2019 - Drug Repurposing May Provide More Psychiatric Tx Options
January 16, 2019 - A new brain imaging study challenges the dominant theoretical model of autism spectrum disorders
January 16, 2019 - GoFundMe CEO: ‘Gigantic Gaps’ In Health System Showing Up In Crowdfunding
January 16, 2019 - Induced neuronal cells derived from fibroblasts are similar to neurons in the brain
January 16, 2019 - New study finds link between childhood abuse and suicide in later life
January 16, 2019 - Lifestyle and health factors that are good for the heart can also prevent diabetes
January 16, 2019 - Scientists take another step in understanding bacteria that cause Salmonella epidemic
January 16, 2019 - Look to Your Aunts, Uncles and Parents for Clues to Your Longevity
January 16, 2019 - Study finds ADHD drugs are unlikely to cause cardiac damage in children who take them
January 16, 2019 - Call The Midwife! (If The Doctor Doesn’t Object)
January 16, 2019 - Changes in hippocampal structural connectivity differentiate responders of electroconvulsive therapy
January 16, 2019 - Study sheds light on the deadly venom of Mojave rattlesnakes
January 16, 2019 - University of Nebraska to develop new drugs that prevent and counteract effects of radiation exposure
January 16, 2019 - Sugar-based stent makes precarious sewing process easier
January 16, 2019 - FDA-approved drug hampers cancer metastasis in animal model, shows study
January 16, 2019 - Memories of past meals influence future food intake in rats
January 16, 2019 - Low-level cannabis use can change the adolescent brain
January 16, 2019 - MTC in Rouen acquires Robocath’s R-One robot for future healthcare practitioner training
January 16, 2019 - OSSIO granted FDA 510(k) market clearance for OSSIOfiber Bone Pin Family
January 16, 2019 - Childhood body composition may play a role in future respiratory health
January 16, 2019 - Outdated commissioning methods are failing mental health services in the UK, reveals report
January 16, 2019 - Unconventional immune cells trigger disturbed cytokine production in human spondyloarthritis
January 16, 2019 - Patients Turn To GoFundMe When Money And Hope Run Out
January 16, 2019 - Researchers develop novel viral identification method
January 16, 2019 - Study proposes improvements in pharmacological study of cognitive function enhancers in schizophrenia
January 16, 2019 - Study points to potential new biomarker and drug target for amyotrophic lateral sclerosis
January 16, 2019 - Differences in geographic origin of genes may affect mitochondrial function
Males who spend more time taking care of kids have greater reproductive success

Males who spend more time taking care of kids have greater reproductive success

image_pdfDownload PDFimage_print

Males have greater reproductive success if they spend more time taking care of kids — and not necessarily only their own, according to new research published by anthropologists at Northwestern University.

In a previous study, the researchers found that wild male mountain gorillas living in Rwanda do something that is quite unusual for a mammal — they help take care of all of the kids that live in their social group, regardless of whether they are the father. The goal of the new study was to figure out why.

“Mountain gorillas and humans are the only great apes in which males regularly develop strong social bonds with kids, so learning about what mountain gorillas do and why helps us understand how human males may have started down the path to our more involved form of fatherhood,” said Stacy Rosenbaum, lead author of the study and a post-doctoral fellow in anthropology at Northwestern.

Christopher Kuzawa, a co-author of the study, said the findings run counter to how we typically think of male mountain gorillas — huge, competitive and with reproduction in the group dominated by a single alpha male.

“Males are spending a lot of time with groups of kids — and those who groom and rest more with them end up having more reproductive opportunities,” said Kuzawa, professor of anthropology at Northwestern and a faculty fellow at the University’s Institute for Policy Research. “One likely interpretation is that females are choosing to mate with males based upon these interactions.”

Added Rosenbaum: “We’ve known for a long time that male mountain gorillas compete with one another to gain access to females and mating opportunities, but these new data suggest that they may have a more diverse strategy. Even after multiple controls for dominance ranks, age and the number of reproductive chances they get, males who have these bonds with kids are much more successful.”

This research suggests an alternative route by which fathering behaviors might have evolved in our own species, Rosenbaum said.

“We traditionally have believed that male caretaking is reliant on a specific social structure, monogamy, because it helps ensure that males are taking care of their own kids. Our data suggest that there is an alternative pathway by which evolution can generate this behavior, even when males may not know who their offspring are,” Rosenbaum said.

This raises the possibility that similar behaviors could have been important in the initial establishment of fathering behaviors in distant human ancestors.

The researchers are currently investigating whether hormones might play a role in helping facilitate these male behaviors, as they do in humans. Seminal work on the hormonal changes that men experience as they become fathers and care for kids has been conducted in the anthropology department at Northwestern.

“In human males, testosterone declines as men become fathers, and this is believed to help focus their attention on the needs of the newborn,” said Kuzawa, who co-authored a study on this topic in the journal Proceedings of the National Academy of Sciences in 2011. “Might gorillas that are particularly engaged in infant interaction experience similar declines in testosterone? Because this would probably impede their ability to compete with other males, evidence that testosterone goes down would be a clear indication that they must be gaining some real benefit — such as attracting mates. Alternatively, if it does not go down, this suggests that high testosterone and caretaking behavior don’t have to be mutually exclusive in mountain gorillas.”

The researchers look forward to exploring these new questions. “We’re working on characterizing these males’ hormone profiles across time, to see if events such as the birth of new infants might be related to their testosterone levels,” Rosenbaum said. “We’re fortunate to have data that span many years of their lives.”

The study’s senior author, Tara Stoinski of The Dian Fossey Gorilla Fund, added that such work highlights the critical importance of long-term research studies.

“Dian Fossey first went to study these mountain gorillas in the 1960s hoping to further our understanding of human evolution,” Stoinski said. “More than 50 years later, the continued research on this population is still providing insights, not only on a critically endangered species, but also into what it means to be human.”

Source:

https://www.northwestern.edu/

Tagged with:

About author

Related Articles