thumbnail

Black Abalone (Haliotis cracherodii) Population Density, Recruitment, Size Structure, and Population Growth at Naval Base Ventura County, San Nicolas Island, California, 2013–22

Open-File Report 2025-1015
Ecosystems Mission Area—Land Management Research Program and Species Management Research Program
Prepared in cooperation with the U.S. Navy
By:  and 
https://doi.org/10.3133/ofr20251015

Links

Abstract

The range of the endangered black abalone (Haliotis cracherodii) is divided into the North Central California region, the Central California region, the Southern California Mainland region, the Channel Islands region, and the Baja California region by the National Marine Fisheries Service for management purposes. San Nicolas Island is one of eight subregions of the Channel Islands region. The black abalone recovery plan establishes five demographic criteria for the possible delisting or downlisting of the species. The U.S. Geological Survey monitors nine long-term intertidal black abalone sites at San Nicolas Island, California, in cooperation with the U.S. Navy, which owns the island. This report uses data collected between 2013 and 2022 and the delisting criteria to analyze and describe the density, recruitment, size structure, and population trends at the nine U.S. Geological Survey monitoring sites at San Nicolas Island.

Suggested Citation

Kenner, M.C., and Yee, J.L., 2025, Black abalone (Haliotis cracherodii) population density, recruitment, size structure, and population growth at Naval Base Ventura County, San Nicolas Island, California, 2013–22: U.S. Geological Survey Open-File Report 2025–1015, 10 p., https://doi.org/10.3133/ofr20251015.

ISSN: 2331-1258 (online)

Study Area

Table of Contents

  • Acknowledgments
  • Abstract
  • Introduction
  • Methods and Results
  • Discussion
  • References Cited
Publication type Report
Publication Subtype USGS Numbered Series
Title Black abalone (Haliotis cracherodii) population density, recruitment, size structure, and population growth at Naval Base Ventura County, San Nicolas Island, California, 2013–22
Series title Open-File Report
Series number 2025-1015
DOI 10.3133/ofr20251015
Publication Date June 13, 2025
Year Published 2025
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Western Ecological Research Center
Description vi, 10 p.
Country United States
State California
Other Geospatial Naval Base Ventura County, San Nicolas Island
Online Only (Y/N) Y
Additional publication details