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Zoning the ocean may help endangered whales to recover
Date:12/16/2009

travelling.

The authors observed that these two conservation threats are linked, so mitigation measures ought to consider the threats simultaneously. They argue that management strategies to protect feeding hotspots should confer greater conservation benefit than those that protect habitat generically.

The team's research identified a small area in which whales were almost three times as likely to be feeding as they were in the rest of the region. By interviewing managers and environmental educators, the team were able ensure their candidate area was large enough to be biologically meaningful while being small enough to allow effective management of human activities within those boundaries. This information could also be incorporated into NOAA Fisheries' recent proposal to create a Marine Protected Area for killer whales.

For some species, critical habitat is immediately apparent from casual observation. Killer whales strand on special beaches in Patagonia (Argentina) to capture seals. A few key lagoons provide obviously important breeding habitat for grey whales in Baja, Mexico. In most cases, identifying critical habitat for whales, dolphins and porpoise is complex, and requires statistical analysis.

"Ashe et al.'s research suggests that the successful conservation of southern resident killer whales depends on paying attention to their feeding behaviour," said Erich Hoyt, Head of the Critical Habitat MPA Program at the Whale and Dolphin Conservation Society and author of Marine Protected Areas for Whales, Dolphins and Porpoises. "Their research has cleverly indicated a relatively small MPA that could nevertheless be helpful here especially if the proposed no-go area applies to all boat traffic (except for emergency situations). MPAs are rarely the complete answer. So much more will need to be done here to ensure the future supply of Chinook salmon that these whales depend on."

"Zoning the ocean is a new conce
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Contact: Ben Norman
Benorman@wiley.com
44-012-437-70375
Wiley-Blackwell
Source:Eurekalert

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