Ok = coho salmon, Om = rainbow trout, Sm = Dolly Varden, GaA = anadromous threespine stickleback, GaR = resident freshwater threespine stickleback, Ca = coastrange sculpin, Pp, ninespine stickleback, Dp = Alaska blackfish
Island Latitude Longitude Waterbody Ok Om Sm Attu 52.
In the winter of 2010-2011, a die-off of Alaska Blackfish was observed in the vicinity of Lake Minchumina, Alaska (UTM: Zone 5, E537377, N7084931, NAD83), in 3 separate bodies of water (Table 1).
While Alaska Blackfish are able to survive extreme conditions, it is clear that they often live at the edge of their physiological abilities and consequently may experience die-offs.
The Alaska Blackfish we observed likely died as a result of hypoxia.
Although Alaska Blackfish are air-breathing and hypoxia tolerant, access to sufficient oxygen for respiration may not be enough for survival during winter under ice.
Alternatively, methane input through ebullition may contribute to the long-term survival of Alaska Blackfish by inhibiting ice formation and producing open holes in ice (Walter Anthony and others 2010).