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- W1993896129 abstract "Out of concern about the potential effects of marine acoustic geophysical survey work on westward-migrating bowhead whales (Balaena mysticetus), the U.S. Minerals Management Service (MMS), in consultation with the U.S. National Marine Fisheries Service (NMFS), implemented a program for monitoring and regulating such work in the Alaskan Beaufort Sea during 1981 and 1982. In 1982 a twin-turbine, high-wing aircraft was used to survey systematically blocks covering approximately 1400 km2 near actively “shooting” seismic survey vessels. Direct visual observation was supplemented by the use of sonobuoys to listen to and record underwater sounds made by vessels, air guns, and whales. In addition to the systematic surveys, sustained behavioral observations of bowheads were made on an opportunistic basis, with the objective of identifying possible differences in behavior between whales exposed to seismic sounds and whales not exposed to seismic sounds. No major changes in whale behavior (e.g., flight reactions) were observed. Tests of statistical significance were applied to data on number of blows per surfacing, mean blow interval per surfacing, surface times, and dive times. Only mean surface time of “adults” (i.e., all whales other than cows and calves) in the presence and absence of seismic sounds (1.67 ± s.d. 0.85 min and 1.36 ± s.d. 0.59 min, respectively) was statistically significant (t = 1.988, df = 89, p < 0.05). No statistically significant differences were detected for other behavioral parameters in the presence and absence of seismic sounds." @default.
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- W1993896129 date "1983-11-01" @default.
- W1993896129 modified "2023-09-25" @default.
- W1993896129 title "Interaction between offshore geophysical exploration activities and bowhead whales in the Alaskan Beaufort Sea, Fall 1982" @default.
- W1993896129 doi "https://doi.org/10.1121/1.2021032" @default.
- W1993896129 hasPublicationYear "1983" @default.
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