Gray whales, Eschrichtius robustus, avoid the underwater sounds of killer whales, Orcinus orca.

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Citation: Cummings, W.C. and Thompson, P.O., 1971. Gray whales, Eschrichtius robustus, avoid the underwater sounds of killer whales, Orcinus orca.. Fishery Bulletin, 69, ps 525-530.
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Summary:

Predator sounds (killer whales, Orcinus orcas) caused gray whales (Eschrichtius robustus) to leave an area off the California coast.
Field Studies:
Location Fishing gear Reduction technique Bycatch species Effect on bycatch species Catch Effect on target catch Type
California   Animal predation sounds Large Cetaceans (maximum length > 7.5 meters) Whales left area Sablefish In the wild