Three acoustic moorings were deployed on 20 June 2012, one in the core area of known beluga distribution in Disenchantment Bay (by Turner Glacier), and two off the mouths of Esker Creek and Grand Wash River (Fig.
Therefore, only data from Esker Creek and Grand Wash River are discussed here.
Therefore, minumum ICI values for each beluga and harbor porpoise click train logged by the C-POD's in Esker Creek and Grand Wash River were analyzed to identify those containing terminal buzzes.
Pacific salmon, Oncorhynchus spp., run data were obtained from the Alaska Department of Fish and Game for Esker Creek and Grand Wash River for the 2012 season.
Fish and invertebrate data were collected in 2013 using a bottom trawl at both Esker Creek and Grand Wash River (Fig.
Trawl transects were established near the Esker Creek and Grand Wash River acoustic monitoring sites.
Beluga and harbor porpoise presence were acoustically monitored for 120 days in Esker Creek and 261 days in Grand Wash River. Acoustic detections of both beluga and harbor porpoise echolocation were identified in each location.
No diel pattern in porpoise presence was identified in Grand Wash River.
In Grand Wash River, neither total fish CPUE nor invertebrate CPUE per month had any relationship to monthly porpoise DPH (Fig.
2012, and for harbor porpoises in Grand Wash River from Jan.
Beluga presence in the Grand Wash River area was limited to a single detection on 25 Nov.
2012, suggesting that this area is an important part of their summer distribution, and that the limit of the core habitat for Yakutat belugas is somewhere between the Grand Wash River and Esker Creek sites.