Study

Twenty-five years of rehabilitation of odontocetes stranded in central and northern California, 1977 to 2002

  • Published source details Zagzebski K.A., Gulland F.M.D., Haulena M. & Lander M.E. (2006) Twenty-five years of rehabilitation of odontocetes stranded in central and northern California, 1977 to 2002. Aquatic Mammals, 32, 334-345

Actions

This study is summarised as evidence for the following.

Action Category

Rehabilitate and release injured, sick or weak marine and freshwater mammals

Action Link
Marine and Freshwater Mammal Conservation
  1. Rehabilitate and release injured, sick or weak marine and freshwater mammals

    A replicated study in 1977–2002 at multiple pelagic sites in the North Pacific Ocean, off the coast of California, USA (Zagzebski et al. 2006) found that seven of 70 (10%) stranded toothed whales (Odontoceti) were successfully rescued, rehabilitated and released back into the wild, and three were known to survive for at least three days to five months after release. Seven of 70 (10%) stranded toothed whales were successfully rescued and released back into the wild. Two common dolphins Delphinus delphis and one harbour porpoise Phocoena phocoena were tracked after release for 3 days, 31 days and five months respectively. Survival of the other four released animals (two bottlenose dolphins Tursiops truncatus, two common dolphins Delphinus spp.) was not reported. The other 63 stranded animals either died during rescue (21), transport (five) or rehabilitation (34) or were kept in captivity (three). Seventy toothed whales of 13 species were found stranded alive in 1977–2002 (see original paper for details). Thirty-seven animals were given medical treatment at rehabilitation facilities. Two common dolphins and one harbour porpoise were satellite-tagged and tracked after release in 1994, 1995 and 2001–2002 respectively. Two bottlenose dolphins and two common dolphins were released but not tracked (dates not reported).

    (Summarised by: Anna Berthinussen)

Output references

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, terrestrial mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 18

Go to the CE Journal

Discover more on our blog

Our blog contains the latest news and updates from the Conservation Evidence team, the Conservation Evidence Journal, and our global partners in evidence-based conservation.


Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape Programme Red List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Bern wood Supporting Conservation Leaders National Biodiversity Network Sustainability Dashboard Frog Life The international journey of Conservation - Oryx British trust for ornithology Cool Farm Alliance UNEP AWFA Butterfly Conservation People trust for endangered species Vincet Wildlife Trust