CALIFORNIA SEA LIONS

California Sea Lions

WATCH NOW. SURFING SEA LIONS AT SANTA BARBARA ISLAND

CALIFORNIA SEA LIONS (Zalophus californianus)

• FARALLON ISLANDS

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• SAN CLEMENTE ISLAND
• SANTA BARBARA ISLAND
• SANTA CATALINA ISLAND
• SANTA CRUZ ISLAND

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• ISLA SAN MARTIN

SOUNDS

Listen to California Sea Lions with Elephant Seals on Santa Cruz Island, recorded by Justin Messina.

FARALLON ISLANDS

ISLAND	COLLECTOR	INSTITUTION	DATE	NUMBER	SPECIMEN
Farallon Islands	Leon de Cessac & Pinart	MNHN	1878-1879	MNHN ZM AC-1879-269	Zalophus californicus	Marine Mammals
Farallon Islands	Leon de Cessac & Pinart	MNHN	1878-1879	MNHN ZM AC-1879-270	Zalophus californicus	Marine Mammals
Farallon Islands	Leon de Cessac & Pinart	MNHN	1878-1879	MNHN ZM AC-1879-271	Zalophus californicus	Marine Mammals
Farallon Islands	Leon de Cessac & Pinart	MNHN	1878-1879	MNHN ZM AC-1882-190	Zalophus californicus	Marine Mammals
Farallon Islands	Leon de Cessac & Pinart	MNHN	1878-1879	MNHN ZM AC-1885-2	Zalophus californicus	Marine Mammals
Farallon Islands	Leon de Cessac & Pinart	MNHN	1878-1879	MNHN ZM AC-1897-222	Zalophus californicus	Marine Mammals

SAN CLEMENTE ISLAND

ISLAND	COLLECTOR	INSTITUTION	DATE	NUMBER	SPECIMEN
San Clemente Island	Albert C. Rogers	DMNS	June 27, 1928,	DMNS-2364	Zalophus californianus	Marine Mammals
San Clemente Island	Albert C. Rogers	DMNS	June 27, 1928,	DMNS-2365	Zalophus californianus	Marine Mammals
San Clemente Island	Albert C. Rogers	DMNS	June 27, 1928,	DMNS-2366	Zalophus californianus	Marine Mammals
San Clemente Island	Albert C. Rogers	DMNS	June 27, 1928,	DMNS-2367	Zalophus californianus	Marine Mammals
San Clemente Island	Albert C. Rogers	DMNS	June 27, 1928,	DMNS-2368	Zalophus californianus	Marine Mammals
San Clemente Island	Albert C. Rogers	DMNS	June 27, 1928,	DMNS-2369	Zalophus californianus	Marine Mammals
San Clemente Island	Albert C. Rogers	DMNS	June 27, 1928,	DMNS-2370	Zalophus californianus	Marine Mammals

SANTA BARBARA ISLAND

ISLAND	COLLECTOR	INSTITUTION	DATE	NUMBER	SPECIMEN
Santa Barbara Island	Victor B. Scheffer	UAM	December 5, 1946	UAM-120700	Zalophus californianus	Marine Mammals

SANTA CATALINA ISLAND

• Santa Catalina Island Post Cards: Sea Lions

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SANTA CRUZ ISLAND

ISLAND	COLLECTOR	INSTITUTION	DATE	NUMBER	SPECIMEN
Santa Cruz Island	J. S. Rowley	UMMZ	July 12, 1946	UMMZ-77659	Zalophus californianus	Marine Mammals

ISLA SAN MARTIN

ISLAND	COLLECTOR	INSTITUTION	DATE	NUMBER	SPECIMEN
Isla San Martin	G. D. Hanna & Frank Tose	CAS	1922	CAS-4174	Zalophus californianus californianus	Mammals
Isla San Martin	W. V. Mayer	LACM	April 13, 1951	LACM-051203	Zalophus californianus	Mammals
Isla San Martin	W. V. Mayer	LACM	April 13, 1951	LACM-051204	Zalophus californianus	Mammals

In the News~

August 14, 2019 [Sonoma Times]: “Demographics of sea lion pups show a population under pressure. According to the California Office of Environmental and Health Hazard Assessment, (OEHHA), annual sea lion pup birth counts at San Miguel Island between 1997 and 2016 ranged from a low of 9,428 to a high of 27,146. The greatest declines occurred in 1998, 2009, and 2010, all years characterized by warm ocean conditions. According to their compiled research, pup production is a result of successful pregnancies and is an indicator of fish and cephalopods that serve as prey for sea lions. High pup counts in 2011 and 2012 suggest that pregnant females experienced good foraging conditions in these years when cooler ocean conditions prevailed. The number of births declined again in 2015 and 2016 in response to warmer ocean waters due to a marine heat wave and El Niño conditions.”