Northern Elephant Seals
(Mirounga angustirostris)
Satellite Tagging Program

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Research facility: Marine Mammal Care Center, San Pedro, California


Release Date
July 28, 1997
33 28.2N, 118 28.1W
10:25 AM PDT ( 20:25 GMT)

"Arthur" (97-56), Satellite Tag #1656

On May 7, 1997 "Arthur" (97-56) stranded in Redondo Beach, California. This animal is less than one year old. He weighed 41.7 Kg (92 pounds) and was 1.30m (51 inches) in length. He underwent antibiotic therapy for pneumonia and additional treatment for parasitic infestations.
At the time of tagging and release in July, 1997 he had grown to over 69 Kg (152 pounds) and 1.47m (58 inches). Arthur (97-56) was given the National Marine Fisheries Service (NMFS) roto-tag number 3709.

"Mac" (97-63), Satellite Tag # 1657

On June 3, 1997, "Mac" (97-63) stranded in Malibu, California at the Ventura County line. He weighed 68Kg (150 pounds) and was 1.9m (75 inches) in length. "Mac" is over one year old and became weak during a difficult molt. He had a heavy parasitic infestation and was treated for this as well as an abnormal skin condition.
At the time of tagging and release in July, 1997 he had grown to over 93 Kg (205 pounds). Mac (97-63) was given the National Marine Fisheries Service (NMFS) roto-tag number 3702.


Data and Maps

  • Data Sheet, Satellite Fixes, the Elephant Seals "Mac" and "Arthur" (Data Sets)
    How to analyze seal data transmissions.
    Summary of Data

  • Tracking Map - Elephant Seals, TBA

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    3601 S. Gaffey St.
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    Center for Marine Studies
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