Breaking News
March 24, 2019 - Combined immunosuppression may be effective, safe in treating older patients with Crohn’s disease
March 24, 2019 - GSK sells health drinks arm, buys US cancer treatment firm
March 24, 2019 - Bacteria and innate immune factors in birth canal, cervix may be key to predicting preterm births
March 24, 2019 - IgG antibodies play unexpected role in atherosclerosis
March 24, 2019 - Sounds and vibrations are quite similar for the brain, finds new study
March 24, 2019 - Practices for Reducing COPD Hospital Readmissions Explored
March 24, 2019 - Could an eye doctor diagnose Alzheimer’s before you have symptoms?
March 24, 2019 - Enzyme inhibitor stops inflammation and neurodevelopmental disorders in mouse models
March 24, 2019 - Walk, Dance, Clean: Even a Little Activity Helps You Live Longer
March 24, 2019 - Americans used less eye care in 2014 versus 2008
March 24, 2019 - Study finds link between depression in 20s linked to memory loss in 50s
March 24, 2019 - New tool helps physiotherapy students to master complex fine motor skills
March 24, 2019 - The AMR Centre secures £2.3m funding boost
March 24, 2019 - Study examines effects of taking ondansetron during first trimester of pregnancy
March 24, 2019 - Researchers identify a more effective treatment for cancer
March 24, 2019 - Open-source solution for multiparametric optical mapping of the heart’s electrical activity
March 24, 2019 - New nanotechnology approach shows promise in treating triple negative breast cancer
March 24, 2019 - Trevena Announces Publication of APOLLO-1 Results in The Journal of Pain Research Highlighting Oliceridine’s Potential for Management of Moderate-to-Severe Acute Pain
March 24, 2019 - Maternal deaths following C-section 50 times higher in Africa compared to high-income countries
March 24, 2019 - Apple watch could detect irregular heart beat says study
March 24, 2019 - Queen Mary University of London’s BCI boosts radionuclide imaging capabilities with MILabs VECTor technology
March 24, 2019 - Girls should be encouraged to gain more ball skills, shows study
March 24, 2019 - Acute doses of synthetic cannabinoid can impair critical thinking and memory
March 24, 2019 - Presence of bacteria in urine does not always point to infection, shows study
March 24, 2019 - Scientists identify a new role for nerve-supporting cells
March 24, 2019 - Hidden differences between pathology of CTE and Alzheimer’s disease discovered
March 24, 2019 - Knowing causative genes of osteoporosis may open door to more effective treatments
March 24, 2019 - Toilet-seat based cardiovascular monitoring system getting ready to begin commercialization
March 24, 2019 - New model for intensive care identifies factors that send ill patients to ICU
March 24, 2019 - Recommendations Issued for HSCT in Multiple Myeloma
March 24, 2019 - Deep brain stimulation provides sustained relief for severe depression
March 24, 2019 - “Statistical significance” may soon be a thing of past?
March 24, 2019 - Researchers track effects of epigenetic marks carried by sperm chromosomes
March 24, 2019 - AHA News: Family Adopts Three Children With Three Different Heart Conditions
March 24, 2019 - Research into opioid painkillers could provide clues for safer drug development
March 23, 2019 - Lung cancer survivor recounts her lifetime struggles
March 23, 2019 - Radial and femoral approach for PCI achieve similar results in terms of survival
March 23, 2019 - Study sheds light on the optimal timing of coronary angiography in NSTEMI patients
March 23, 2019 - Excess hormones could cause a condition that can lead to blindness in women, study finds
March 23, 2019 - Dramatic shifts in first-time opioid prescriptions bring hope, concern
March 23, 2019 - Antidepressant drugs may not work when neurons are out of shape
March 23, 2019 - TTUHSC El Paso to establish endowed chair in neurology through a major grant
March 23, 2019 - New device approved by FDA for treating patients with moderate-to-severe heart failure
March 23, 2019 - People with peripheral artery disease have lower Omega-3 Index, shows research
March 23, 2019 - Trigger warnings have minimal impact on how people respond to content, shows research
March 23, 2019 - Gilead Announces Data From Two Studies Supporting Further Development of GS-6207, a Novel, Investigational HIV-1 Capsid Inhibitor as a Component of Future Long-Acting HIV Therapies
March 23, 2019 - Selfish genetic elements amplify inflammation and age-related diseases
March 23, 2019 - Study provides new understanding of how the brain recovers from damage caused by stroke
March 23, 2019 - CRISPR/Cas libraries could revolutionize drug discovery
March 23, 2019 - Allergic reaction during pregnancy may alter sexual-development in offspring’s brain
March 23, 2019 - Seeing through a robot’s eyes helps those with profound motor impairments
March 23, 2019 - Recent research shows that ease of breastfeeding after C-section differs culturally
March 23, 2019 - Newly discovered parameters offer more control over efficient release of drugs
March 23, 2019 - ‘De-tabooing’ of abortion- Women would like more support from health care community
March 23, 2019 - Anti-TB drugs can increase susceptibility to Mtb reinfection
March 23, 2019 - New survey indicates need of attention to neglected tropical diseases
March 23, 2019 - Innovative in vitro method to develop easy-to-swallow medicine for children and older people
March 23, 2019 - Sugary drinks could raise risk of early deaths finds study
March 23, 2019 - Lian wins ENGINE grant for stem-cell-based therapy to treat Type 1 diabetes
March 23, 2019 - Overall, Physicians Are Happy and Enjoy Their Lives
March 23, 2019 - Researchers discover how blood vessels protect the brain during inflammation
March 23, 2019 - CDC study shows modest improvement in optimal hospital breastfeeding policy
March 23, 2019 - Family-based prevention program to reduce alcohol use among older teens
March 23, 2019 - Remote monitoring of implanted defibrillators in heart failure patients prevents hospitalizations
March 23, 2019 - Appropriate doffing of personal protective equipment may reduce healthcare worker contamination
March 23, 2019 - Window screens can suppress mosquito populations, reduce malaria in Tanzania
March 23, 2019 - Researchers discover new biomarker for postoperative liver dysfunction
March 23, 2019 - Pregnancy history may be linked to cognitive function in older women, finds study
March 23, 2019 - Study shows ticagrelor is equally safe and effective as clopidogrel after heart attack
March 23, 2019 - FDA Approves First Drug for Postpartum Depression, Zulresso (brexanolone)
March 23, 2019 - New guidelines outline new treatment management for psoriasis
March 23, 2019 - Thermally abused cooking oil may promote progression of breast cancer
March 23, 2019 - High-fructose corn syrup fuels growth of colon tumors in mice
March 23, 2019 - Partnership aims at establishing best practices to promote diversity in clinical trials
March 23, 2019 - New study examines presence of microbes in tap water from residences, office buildings
March 23, 2019 - Early life trauma may affect brain structure, contribute to major depressive disorder
March 23, 2019 - NIH starts clinical trial of drug to treat cravings associated with opioid use disorder
March 23, 2019 - Cervix bacteria, immune factors could be a warning signal of premature birth, reports new research
March 23, 2019 - Worst-ever emergency care performance figures underscore the need to focus on staffing
March 23, 2019 - The Current issue of “The view from here” is concerned with Cancer
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