Breaking News
November 15, 2018 - Mass shootings may trigger unnecessary blood donations
November 15, 2018 - From heart disease to cancer: New study tracks shift of county death rates
November 15, 2018 - Preventing falls with new sensor technology
November 15, 2018 - Promising technology could improve detection, diagnosis of fatal ovarian cancer
November 15, 2018 - AAP updates concussion recommendations for children and teens
November 15, 2018 - Two genomic tests help identify most effective treatment for breast cancer patients
November 15, 2018 - Researchers evaluate efficacy of salivary biomarkers for early detection of oral cancer
November 15, 2018 - NIH awards $3.5 million to continue development of robotic system for treating brain tumors
November 15, 2018 - Researchers succeed in building protein nanotubes from tiny scaffolds
November 15, 2018 - Rectal bleeding
November 15, 2018 - Nasal delivery of weight-loss hormone eases breathing problems in sleeping mice
November 15, 2018 - $9.6 million grant to fund research on vascular risk factors for brain aging, dementia | News Center
November 15, 2018 - Gum disease linked with diabetes
November 15, 2018 - Study identifies unique functional brain networks associated with ASD behaviors in infancy
November 15, 2018 - EU and industry-funded project aims to personalize diabetes treatment
November 15, 2018 - NIH researchers shed light on causes of HBV-associated acute liver failure
November 14, 2018 - FDA Alert: Implanted Pumps: Safety Communication
November 14, 2018 - Weight loss & acute Porphyria
November 14, 2018 - Researchers identify three sub-types of depression
November 14, 2018 - The puzzle of a mutated gene lurking behind many Parkinson’s cases | News Center
November 14, 2018 - The mystery viruses far worse than flu
November 14, 2018 - Research highlights physical changes in the brain of self-injuring teen girls
November 14, 2018 - Speed and error rate of DNA synthesis influenced by DNA structure
November 14, 2018 - Cranberry consumption modifies impact of animal-based diet on gut health
November 14, 2018 - £500,000 grant could pave way for new antibiotic to battle against drug-resistant superbugs
November 14, 2018 - Trump Administration Finalizes Birth Control Coverage Opt-Out
November 14, 2018 - Modern life offers children almost everything they need, except daylight
November 14, 2018 - Getting better: A patient is more than a collection of numbers
November 14, 2018 - 20 Americans Die Each Day Waiting For Organs
November 14, 2018 - First bifacial molecule can invade double-stranded DNA or RNA
November 14, 2018 - Study finds lack of safety data for using flowers in cooking
November 14, 2018 - Statistical methods play key role in predicting efficacy of new drugs
November 14, 2018 - Research explores how exercise may help fight drug addiction
November 14, 2018 - Health Tip: Limit Fat, Sugar and Salt in Your Child’s Diet
November 14, 2018 - CA 19-9 Blood Test (Pancreatic Cancer): MedlinePlus Lab Test Information
November 14, 2018 - Old drug could have new use helping sick premature babies
November 14, 2018 - Surgery, not antibiotics, should remain first-line treatment for appendicitis | News Center
November 14, 2018 - Researchers to develop sports-specific classification system for blind football
November 14, 2018 - Preschool children show awake responses to naptime nonsense words
November 14, 2018 - Researchers develop innovative treatment to repair damaged brain tissues
November 14, 2018 - Survey shows negative effect of vulvovaginal atrophy symptoms on quality of life for women
November 14, 2018 - Study sheds light on mechanisms that prevent autoimmune attack
November 14, 2018 - Sleep quality found to be worse for women who undergo surgical menopause
November 14, 2018 - One-hour cognitive behavioral therapy session reduces insomnia symptoms in prisoners
November 14, 2018 - New study provides deeper insight into chromosome segregation during mitosis
November 14, 2018 - Surgical menopause leads to more disrupted sleep than natural menopause
November 14, 2018 - Inhibition of one protein clears toxic clumps seen in Parkinson’s disease, study finds
November 14, 2018 - Appendix removal is linked to lower risk of Parkinson’s
November 14, 2018 - Lifting weights for less than an hour a week may reduce cardiovascular disease risk
November 14, 2018 - Pulmonary rehabilitation rarely received by hospitalized COPD patients despite health benefits
November 14, 2018 - New anti-HER2 drug shows promising anti-tumor activity in gullet, stomach and bowel cancers
November 14, 2018 - Regular head circumference assessment of preterm babies can help identify long-term IQ problems
November 14, 2018 - Brigham investigators examine opioid use among Massachusetts adolescents, prescription trends
November 14, 2018 - Study defines biomarker in response to treatment of castration-resistant prostate cancer
November 14, 2018 - Study identifies potential therapeutic strategy for patients with clear cell renal cancer
November 14, 2018 - Bausch Health Announces U.S. Launch of Bryhali (halobetasol propionate) Lotion, 0.01%, for Plaque Psoriasis In Adults
November 14, 2018 - Alpha Fetoprotein (AFP) Tumor Marker Test: MedlinePlus Lab Test Information
November 14, 2018 - Researchers evaluate controversial treatment for Parkinson’s disease psychosis
November 14, 2018 - AI could help veterinarians code their notes
November 14, 2018 - Pre-schoolers with autism thrive in mainstream classroom settings
November 14, 2018 - Individual and work-related factors may help promote hospital physician engagement, finds study
November 14, 2018 - Complementary and alternative medicine is widely used by general population in England
November 14, 2018 - Study reveals link between tobacco availability and smoking during pregnancy
November 14, 2018 - Purdue researchers develop translucent base for silicon patches to deliver exact doses of biomolecules
November 14, 2018 - New technology based on moths and magnets could help treat genetic diseases
November 14, 2018 - Concussion-Related Biomarkers Vary Based on Sex, Race
November 14, 2018 - One more year of high school may shape waistlines later in life
November 14, 2018 - Dissecting high drug costs – Scope
November 14, 2018 - Study shows novel strategy to reduce breast cancer bone metastasis
November 14, 2018 - Empowering the NHS through Industry Partnerships
November 14, 2018 - One size does not fit all in obesity treatment, study finds
November 14, 2018 - Seeking ways to prevent ‘secondary cataracts’
November 14, 2018 - Change Within the Eye May Be Early Warning for Macular Degeneration
November 14, 2018 - Study of 500,000 people clarifies the risks of obesity
November 14, 2018 - Ultrasound releases drug to alter activity in targeted brain areas in rats | News Center
November 14, 2018 - Umass Amherst researchers battle against youth suicide in rural Alaska Native communities
November 14, 2018 - Cancer stem cells depend on amino acid metabolism, and it’s proving to be their Achilles’ heel
November 14, 2018 - Epigenetic link found between prenatal exposure to maternal smoking and offspring’s cardio-metabolic health
November 14, 2018 - Meditation, music may change biomarkers of cellular aging and Alzheimer’s disease in older adults
November 14, 2018 - Multidisciplinaryresearch teams selected to study age-related brain disorders
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