Living In Waste

Earwig

Earwig

Feces excreted by animals can breed pathogens and transmit disease. Important human diseases such as hookworm are transmitted through contact with feces and can be prevented by sanitation measures. Contact with fecal material is not universally detrimental.  Some insects do not appear to be harmed by their fecal material, but incorporate into their biology.

The European Earwig, Forficula auricularia, builds nests to raise its young.  The walls of the nest are lined with earwig feces. Why?  If food is withheld from the earwigs, they will consume the feces to prolong their life. When food is available, the earwigs will consume feces in addition to food.

There may be other benefits. Do earwigs use feces as probiotics? Feces may contain microorganisms that can colonize the gut and aid digestion. Consumption of feces by nest mates would aid transmission of useful microorganisms. Coprophagy (consumption of feces) has been observed for other social insects and has an important role in those colonies.

About jjneal

Jonathan Neal is an Associate Professor of Entomology at Purdue University and author of the textbook, Living With Insects (2010). This blog is a forum to communicate about the intersection of insects with people and policy. This is a personal blog. The opinions and materials posted here are those of the author and are in no way connected with those of my employer.
This entry was posted in behavior, by jjneal. Bookmark the permalink.

One Response to Living In Waste

  1. Pingback: Living In Waste – Entomo Planet

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s