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Before having a baby, most human parents plan and prepare to make sure they can provide for their new bundle of joy. They determine if they are able to feed them, give them a good home and provide them with the best chance to grow up. Researchers at the University of 易胜博官网 have found a similar behavioral pattern in the beetle world 鈥� specifically with burying beetles, who may plan reproduction听based on the availability of resources such as food.

鈥淲hat we see here is burying beetles providing parental care, which the majority of insects do not,鈥� says Brooke Woelber, a doctoral candidate in the and the study鈥檚 lead author. 鈥淭hey are assessing their situation and making decisions about the number of offspring they should have, and how many听could survive, in certain environments.鈥�

In the study, recently published in the , the researchers manipulated different environments by increasing or decreasing the number of beetles, which either increased or decreased the competition for food听and changed the availability of food for future offspring. This was done to see if it would influence the decisions made by the breeding pair, or prospective parents, about the听size of their family.

鈥淏urying beetles are one of the few insects where both the male and female parent provide care to their developing young 鈥� much like what we see in some birds,鈥� says Woelber. 鈥淭hese beetle parents take a more active role听in reproduction compared to other insects by finding a food source such as a mouse carcass, burying it, then consuming and regurgitating it to feed their developing young.鈥�

Researchers found that the burying beetle parents made choices and prepared differently based on how much food was available. In the controlled environment where food was abundant and beetles did not face any competition for food, the beetle parents produced significantly more offspring that ended up smaller as they matured. These results occurred only when the beetles were well-fed.

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In contrast, in environments where food was limited, the number of offspring was also limited. Specifically, when there was less food and the beetles faced more competition for nourishment, prospective parents made a decision to have fewer offspring. However, in these high-competition and limited-food environments, the offspring were significantly larger compared to the low-competition environments where food was abundant and offspring were smaller.

鈥淭his parental interaction and care of their young throughout development makes burying beetles unique. Most other insect species lay their eggs and leave,鈥� says Woelber.听鈥淭hese beetles assess the situation and decide how many offspring to rear (by eating some larvae) so they will have the best chance to survive and reproduce in a competitive world.鈥�

The researchers says future work will evaluate how the burying beetle鈥檚 reproductive behavior alters the soil environment that they reproduce in, in this case 易胜博官网鈥檚 mixed hardwood forests. In particular, they want to know how nutrients and microbial biomass (number of bacteria and fungi) change in the soil where they reproduce. Burying beetles are considered beneficial insects important to soil nutrient cycling, but few studies have actually measured their impacts.

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This material is based upon work supported by the , through joint funding of the National Institute of Food and Agriculture, U.S. Department of Agriculture, under award number 101029, and the state of 易胜博官网.