World Library  
Flag as Inappropriate
Email this Article

Castro Rocks

Castro Rocks are several rocks in Richmond, California protruding from the waters in San Francisco Bay between Castro Point and Red Rock Island.The rocks lie almost directly under the Richmond-San Rafael Bridge (I-580).[1] The rocks are named after Don Víctor Castro a local rancho-era land owner.

Castro Rocks are the home of many harbor seals,[2] which lie on them to rest and sunbathe. The rocks are the largest harbor seal rookery in the northern San Francisco Bay and the second largest in the Bay Area itself.[3] There are also sometimes sea lions on the rocks.[4] The rock's Harbor Seals also frequent Mowry Slough, Brooks Island, Yerba Buena Island, and Mare Island.[5]

The seals at this location have high levels of toxic pollutants including the DDT, PCBs, PBDEs, PFOS, PFOA, and mercury.[6]


  1. ^ Topographic map, TopoQuest, retrieved July 6, 2008
  2. ^ Tagging program, SFSU, retrieved August 1, 2007
  3. ^ SFSU, Castro Rocks page, retrieved August 1, 2007
  4. ^ NOAA Seeks Comments On A Proposed Reauthorization For California Department Of Transportation To Harass Seals During Bridge Reconstruction, NOAA Press Release, February 12, 1999, retrieved August 4, 2007
  5. ^ vhfmapweb.jpg, Radio tagging map, San Francisco State University, February 2004, retrieved August 4, 2007
  6. ^ Harbor seals may help determine effect on humans of eating toxic fish, by Jane Kay, San Francisco Chronicle, 19-10-2009, access date 19-02-2009

External links

  • Castro Rocks page
  • SFSU Tagging - Photos

This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.