Stressful, isn't it?
“Species distribution models have shown that austral spring chlorophyll-a concentration, prior to the whales’ arrival, and thermal fronts are important oceanographic proxies for describing the abundance and distribution patterns of blue whales within the NCP. Krill, the primary prey of blue whales, can take advantage of seasonally enhanced productivity for biomass production, with some time lag linking early life-history stages with adult densities,” state the researchers in their study.
“Adult krill biomass is subsequently concentrated by thermal fronts into high-density patches which blue whales prey upon. This prey aggregation effect driven by thermal fronts could be critical for blue whales, and other large baleen whales, given their energetically costly feeding behavior. We hypothesize that both the time-lagged distribution of primary productivity and the thermal front aggregating effect generates foraging conditions for blue whales within NCP.
As such, they were able to identify the key areas that require observation in order to avoid the additional loss of blue whales.that showcased how vessel heavy the feeding grounds of the blue whales are. In the visualization, you can see why a whale-vessel collision would be highly likely in this type of environment and why it may be difficult for the endangered species to feed.
“The results of this study clearly pinpoint specific areas where management actions are urgently needed, especially considering the undetermined number of vessels strike and levels of noise exposure in the region. This information should be considered by Governmental and International organizations to inform, design, and rapidly implement mitigation action using existing national and international conservation instruments,” concluded the researchers.
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