Shipboard surveys of endangered cetaceans in the northwestern Gulf of Alaska. Final report
Shipboard surveys were conducted during June-July 1987 along 2,034 nmi of trackline south of the Alaska Peninsula to determine the abundance and distribution of endangered whales and other marine mammals. There were 150 observations of humpback whales, 122 of finback whales, 351 of Dall porpoises, 101 of killer whales, 12 of minke whales, 3 of harbor porpoises, and 170 of pinnipeds and sea otters. Humpbacks were primarily associated with the 50- and 100-fathom isobaths, particularly near the Shelikof Strait submarine canyon and some banks. Humpbacks and finbacks were observed on one occasion feeding together, but their distribution generally did not overlap. The other species were widespread in the study area except for killer whales, which were observed together east of Kodiak Island. Abundance was estimated for humpbacks at 1,247 (+ or - 392 SE) and finbacks at 1,257 (+ or - 563 SE). Sample sizes were too small to estiamte abundance for the other species. These results are similar to those developed for this area in 1985.
- Research Organization:
- Envirosphere Co., Bellevue, WA (USA)
- OSTI ID:
- 5283560
- Report Number(s):
- PB-89-234660/XAB
- Country of Publication:
- United States
- Language:
- English
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020900 -- Petroleum-- Environmental Aspects
03 NATURAL GAS
030800 -- Natural Gas-- Environmental Aspects
54 ENVIRONMENTAL SCIENCES
540310* -- Environment
Aquatic-- Basic Studies-- (1990-)
ANIMALS
AQUATIC ORGANISMS
BASELINE ECOLOGY
BEHAVIOR
BERING SEA
CETACEANS
DATA
DOCUMENT TYPES
DRILLING
ECOLOGY
ENDANGERED SPECIES
ENERGY SOURCE DEVELOPMENT
ENVIRONMENTAL IMPACTS
GULF OF ALASKA
HABITAT
INFORMATION
MAMMALS
MIGRATION
NUMERICAL DATA
OFFSHORE DRILLING
PACIFIC OCEAN
PINNIPEDS
POPULATIONS
PROGRESS REPORT
SEAS
SITE SURVEYS
STATISTICAL DATA
SURFACE WATERS
VERTEBRATES