Virtual Program: How Microbes Influence Island Fox Health and Understanding Island Spotted Skunks

 Join Friends of the Island Fox for a virtual

"Date with a Fox"

Tuesday, January 31 at 6:30–7:30 pm (Pacific Time)

on Zoom

Hear directly from researchers investigating island fox health and biologists working in the field on the Channel Islands.

Jasmine Lu became acquainted with Channel Island foxes while working on her senior thesis at Princeton under the guidance of Alexandra DeCandia, Ph.D. Their work investigated how mite infection can destabilize the microbial community structure in the ear canals of Santa Catalina Island foxes. Their findings have recently been published in the journal Molecular Ecology. Lu will explain their discoveries; she says "It's exciting to be able to contribute to the growing body of knowledge on this fox population!"

 

 

Lara Brenner is a FIF Board Member, island biologist for the Nature Conservancy, and member of the Island Spotted Skunk Conservation Working Group. Island spotted skunks co-exist with island foxes on Santa Cruz and Santa Rosa Islands, but little is known about these tiny predators. As island foxes have recovered, how have island spotted skunks been affected? What are we learning about the relationship between these two endemic predators and what more needs to be investigated? Brenner will provide an update on island spotted skunks.

It should be a fascinating evening. We hope you will join us for this free virtual event. Reservations are required.

Watch The Recorded Program

More on FIF and island spotted skunks

Videos of past "Date with a Fox" programs are available here.

Island Foxes and Island Spotted Skunks Sharing Space On Santa Cruz Island

 (Thank you to our guest blogger Calypso N. Gagorik, MS in Biology, Northern Arizona University)

On the California Channel Islands, the island fox (Urocyon littoralis) has been hypothesized to compete with the smaller-bodied island spotted skunk (Spilogale gracilis amphiala). Recent declines in spotted skunk captures have led to concerns on population viability and what role the foxes may have played in the decline.

(Calypso worked in the field on Santa Cruz Island with fellow researcher Victor Zhang.) 

From 2018–2019, we GPS and VHF collared foxes and spotted skunks living on Santa Cruz Island to assess space use and deployed remote cameras to examine interactions between the two species at spotted skunk den sites. We also explored monitoring tools for spotted skunk detection with emphasis on remote camera placement and use of scent stations.

We found fox and spotted skunk seasonal home ranges were much larger than previously reported on Santa Cruz Island and spotted skunks moved around the landscape differently compared to foxes.  

Spotted skunks showed restricted movement, using less than 50% of their home range over shorter time periods such as a week or month. Foxed moved widely through the landscape covering more than 50% of their home range over the course of a week. During this time, we collected the first photo evidence that foxes may be disturbing resting sites of spotted skunks during the day. We also found that remote cameras placed on drainage bottoms may be more effective in detecting skunks. We discourage the use of scents at camera stations as foxes appear to be monopolizing the stations by repeated marking.

Our knowledge and understanding of spotted skunk ecology are still limited due to the many challenges of studying a cryptic species. We encourage further studies be conducted on spotted skunks, particularly focusing on interactions of foxes and spotted skunks at den sites.

Calypso Gagorik, MS Biology

Read the full thesis: Spacial Use Patterns And Management Recommendations For Two Endemic California Channel Island Mesocarnivores, The Island Spotted Skunk (Spilogale gracilis amphiala) and the Island Spotted Skunk (Urocyon littoralis)

Friends of the Island Fox provided financial assistance to this research project. 

The deadline for the FIF 2021 Research Grant is August 31, 2021 

More Island Fox Research