Post-release monitoring and tracking of a rehabilitated California gray whale

  • Published source details Stewart B.S., Harvey J. & Yochem P.K. (2001) Post-release monitoring and tracking of a rehabilitated California gray whale. Aquatic Mammals, 27, 294-300.


This study is summarised as evidence for the following.

Action Category

Hand-rear orphaned or abandoned marine and freshwater mammal young

Action Link
Marine and Freshwater Mammal Conservation
  1. Hand-rear orphaned or abandoned marine and freshwater mammal young

    A study in 1997–1998 of a pelagic area in the North Pacific Ocean, off the coast of San Diego, USA (Stewart et al. 2001) found that a gray whale Eschrichtius robustus calf reared in captivity and released back into the wild survived for at least three days. The rehabilitated whale calf was successfully tracked for three days after release and was observed swimming strongly before the satellite transmitter became detached. The female calf was found stranded in 1997 and taken to a rehabilitation facility where she was given formula and weaned onto fish and invertebrates. After 14 months in captivity, the calf was satellite-tagged and released several kilometres offshore on 31 March 1998. The calf was tracked and observed from a boat for three days after release before the satellite transmitter dislodged and was found washed ashore.

    (Summarised by: Anna Berthinussen)

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