Thursday, Sep 24, 2020 | Last Update : 12:53 AM IST

183rd Day Of Lockdown

Maharashtra122438091634833015 Andhra Pradesh6317495518215410 Tamil Nadu5473374919718871 Karnataka5268764233778145 Uttar Pradesh3588932895945135 Delhi2492592133045014 West Bengal2283021989834421 Odisha184122149379763 Telangana1726081419301042 Bihar169856155824870 Assam159320129130578 Kerala13863398720554 Gujarat1247671051913337 Rajasthan116881972841352 Haryana113075908841177 Madhya Pradesh108167836182007 Punjab99930754092860 Chhatisgarh8618347653680 Jharkhand7267358543626 Jammu and Kashmir65026421151024 Uttarakhand4177729000501 Goa2875322726360 Puducherry2319118065467 Tripura2227215441245 Himachal Pradesh124387836125 Chandigarh102987411123 Manipur9010683859 Arunachal Pradesh7385540813 Nagaland5544445110 Meghalaya4733252838 Sikkim2447190529 Mizoram158510120
  Life   More Features  21 May 2019  Here is how bonobo mothers help their sons to find love

Here is how bonobo mothers help their sons to find love

AFP
Published : May 21, 2019, 8:45 am IST
Updated : May 21, 2019, 8:45 am IST

Wingmoms: How bonobo mothers help their sons find love.

The bonobo moms act a bit like social passports. (Photo: AFP)
 The bonobo moms act a bit like social passports. (Photo: AFP)

Washington: Anyone who's experienced a mother pushing them to get a move on and produce grandkids might just sympathise with this. A new study has described the outsized role bonobo moms play in their sons' sex lives: from pulling rank to ensure their male offspring get to meet attractive ovulating females, to interfering with male rivals' attempts to mate.

The paper was published Monday in the journal Current Biology and found that bonobo males whose mothers were alive and remained in their group were three times more likely to father children. And the authors credited the success of the "wingmoms" on the nature of bonobos' female-dominant societies, which have long been known for their altruistic and peaceful character, in contrast to more violent and patriarchal chimpanzees.

 

"This is the first time that we can show the impact of the mother's presence on a very important male fitness trait, which is their fertility," co-author Martin Surbeck, a primatologist at the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany said in a statement.

"We were surprised to see that the mothers have such a strong, direct influence on the number of grandchildren they get." For the study, Surbeck and colleagues observed wild bonobo populations in the Democratic Republic of Congo, as well as wild populations of chimpanzees in Ivory Coast, Tanzania, and Uganda.

To verify paternity, they collected the primates' droppings for DNA analysis. They found that while both bonobo and chimpanzee mothers attempted to assist their sons, bonobos were far more successful because their communities' highest ranks are dominated by females.

 

Chimpanzee communities, on the other hand, are dominated by males who compete for alpha status. The two species together are humans' closest relatives in the animal kingdom and share about 99 per cent of our DNA.

"The bonobo moms act a bit like social passports," Surbeck told AFP. "The sons, in close proximity to their moms, are also very central in the group and access positions in the group that allow them to interact more with other females including copulation."

"If there's a female who's very attractive, you see moms stick around them, and in the shadow of their moms are the males," he added. By contrast, they found that if a mother lost her high rank, her son also fell in rank and was subsequently less successful in his mating attempts.

 

In addition to intervening in their sons' rivals attempt to mate, bonobo mothers also protected their own sons from the efforts of rivals to disrupt courting and sex. Interestingly, bonobo mothers did not go the extra mile for their daughters, nor did they help their daughters raise offspring.

Surbeck believes that, since bonobo daughters leave the community and males remain behind, it may simply not be worth the mothers' time and efforts from an evolutionary perspective. One thing the team believes they may now have tentative evidence for is the so-called "grandmother hypothesis": that a post-reproductive female can increase her own lifespan and continue her genes by ensuring her offspring's reproductive success.

 

It is an idea that anthropologists have applied to humans and Surbeck believes it could also be the case for bonobo populations.

Tags: animals, bonobo, sex