Marine Mammals at Fort Ross


 

The history of Fort Ross is inextricably tied to the Pacific Ocean's resources. Russians settled Alaska in their hunt for "soft gold," and later migrated down the Pacific coast with two primary goals: to find a warmer location whereby they could grow enough food to feed those Alaskan settlements, and to increase the range of marine mammals being hunted. It wasn't only the Russians hunting marine mammals -- it's worth noting that many nationalities, in particular the Russians, British, and Americans, hunted sea otters, northern fur seals, and other mammals that once thrived along our coast, often trading these goods with the Chinese. Russians and others realized that the hunting was putting many species on the brink of extinction, and they created one of the earliest moratoriums on hunting practices.


Getting Involved

Interested in getting your feet wet and learning more about your coastline? FRC takes part in three different coastal stewardship surveys at Fort Ross and we welcome you to join us. Taking part in a survey is a great way to increase your understanding of the natural world and helps you to more accurately identify the animals that live on our shores. It's also great fun! If you would like to join us for any of these surveys, please see the date and time listing at the top of our Events page.

Harbor Seal Surveys

Assist us with our citizen scientist effort monitoring the harbor seals that haul out along our coast. Depending on the season, we undertake Harbor Seal surveys twice a month. After meeting at the Fort Ross State Historic Park Visitor Center, our surveys begin roadside at Highway One Mile Marker 33.52, just north of the Fort Ross State Historic Park entrance.  These almost two mile low-tide shoreline surveys end at Fort Ross Cove and take about two hours’ time.

Steller Sea Lion Surveys

Assist us as we monitor one of the most southerly populations of Steller Sea Lions, the largest of the sea lions, that haul out on Sea Lion Rocks just offshore at Fort Ross. Meet at Mile Marker 34.00, just north of Fort Ross. Steller Sea Lion surveys are scheduled just prior to survey, weather and conditions permitting. These surveys are usually led by marine biologist Joe Mortenson. Please call or email us to RSVP and confirm exact Steller Sea Lion monitoring dates, times, status, and weather conditions.

Beach Watch Survey

Currently, Beach Watch surveys, conducted twice a month, cover the area north from Fisk Mill Cove at Salt Point State Park. We hope to add Fort Ross to our Beach Watch program soon. To read more about the Farallones Marine Sanctuary Association’s Beach Watch program and to sign up for future trainings, please click on the Farallones link, or contact Hank Birnbaum and Susanna Barlow at info@fortross.org.

For more information on our Coastal Stewardship programs or to confirm monitoring dates, status and weather conditions, please contact: Hank Birnbaum, Fort Ross Conservancy, hankb[at]fortross[dot]org or (707) 847-3437.


Data From Steller Sea Lion Survey

Fort Ross Conservancy has been collecting data on the marine mammals that haul out at Sea Lion Rocks, just offshore from Fort Ross. The graph below shows the number of Steller Sea Lions seen on a particular rock during the observation date noted at the top left of its frame. Use the slider along the top of the map to change the observation date. The red circle is proportional to the count.

The graph below shows the observation trends over a period of time: 1 day, 5 days, 1 month, 3 months, 6 months, 1 year, and Max (all).

First select the marine mammals for which you want to see trends by left clicking on the select box. To select more than one marine mammal hold the shift or shift + control keys. Then click on the period of time. You can use the slide along the bottom of the frame to scroll through the date range. The legend on the right of the screen states that the green line shows trends for Stellers, the red line for Harbor Seals, and the Orange line for California Sea Lions.

 


Geography


What Marine Mammals Live off the Fort Ross Coast Today?

Several species of marine mammals have re-established populations at Fort Ross:

These species were plentiful during the Russian era but are not seen at Fort Ross today:


 

Monitoring the Marine Mammals at Fort Ross

Today, Fort Ross is home to numerous marine mammal populations. While harbor seals are present along much of the Sonoma coast, Fort Ross' Sea Lion Rocks, and both Bodega Rock and Ano Nuevo to our south host the most southerly and fragile extension of the Steller sea lion (Eumetopias jubatus) population in the Eastern Pacific.

To better assess their health along our coast, Fort Ross Conservancy has created a marine mammal monitoring program. By providing an accurate year-round count of their presence, we hope to address questions such as:

  • What is the trend for Steller Sea Lions at Fort Ross?
  • Does Fort Ross host a breeding colony? Are there pups here, and if so, when?
  • What is the relation between California Sea Lions, Harbor Seals, Elephant Seals and Stellar Sea Lions at Fort Ross?  How does each population use the offshore rocks and marine resources?  Are they competing for space?
  • What other marine mammals call these rocks home?

 

Volunteer Training

Working with local experts, FRC offers hands-on training in identifying and counting these fabulous creatures. Several times a year we offer an informational session during which we will describe the new marine mammal observation program at Fort Ross and give you an opportunity to train and sign up to help us with this exciting field work. 

This is your opportunity to engage with science at a local level. FRC does field monitoring at least once a month, and once a week during the breeding season. 

Often joining us in the field are local experts Dr. Joe Mortenson, co-author of Field Guide to Marine Mammals of the Pacific Coast, Oregon, Washington, British Columbia, and Jamie Hall of the Gulf of Farallones National Marine Sanctuary, both of whom have been conducting field work here since the late 1990's. We invite all to participate in this program to better learn about the health of the waters off Fort Ross.  Call 707-847-3437 or email hankb@fortross.org with questions.


 CSPF logo

We thank California State Parks Foundation for helping launch our Marine Mammal Monitoring program.


Fort Ross Conservancy, a 501(c)(3) and California State Park cooperating association, connects people to the history and beauty of Fort Ross and Salt Point State Parks. 

© Fort Ross Conservancy, 19005 Coast Highway One, Jenner, CA 95450, 707-847-3437