Fish communities across a spectrum of habitats in the western Beaufort Sea and Chukchi Sea

The increased scientific interest in the Arctic due to climate change and potential oil and gas development
has resulted in numerous surveys of Arctic marine fish communities since the mid-2000s. Surveys have
been conducted in nearly all Arctic marine fish habitats: from lagoons, beaches and across the continental
shelf and slope. This provides an opportunity only recently available to study Arctic fish communities
across a spectrum of habitats. We examined fish survey data from lagoon, beach, nearshore benthic, shelf
pelagic and shelf benthic habitats in the western Beaufort Sea and Chukchi Sea. Specifically, we compare
and contrast relative fish abundance and length (a proxy for age) among habitats and seas. We also examined
ichthyoplankton presence/absence and abundance of dominant taxa in the shelf habitat. Our synthesis
revealed more similarities than differences between the two seas. For example, our results show that
the nearshore habitat is utilized by forage fish across age classes, and is also a nursery area for other species.
Our results also indicated that some species may be expanding their range to the north, for example,
Chinook Salmon. In addition, we documented the presence of commercially important taxa such as
Walleye Pollock and flatfishes (Pleuronectidae). Our synthesis of information on relative abundance
and age allowed us to propose detailed conceptual models for the life history distribution of key gadids
in Arctic food webs: Arctic and Saffron Cod. Finally, we identify research gaps, such as the need for surveys
of the surface waters of the Beaufort Sea, surveys of the lagoons of the Chukchi Sea, and winter season
surveys in all areas. We recommend field studies on fish life history that sample multiple age classes
in multiple habitats throughout the year to confirm, resolve and interpret the patterns in fish habitat use
that we observed.

Logerwell, E. A., M. Busby, C. Carothers, J. Duffy-Anderson, E. Farley, P. Goddard, R. Heintz, B. Holladay, J. Horne, S. Johnson, B. Lauth, L. Moulton, D. Neff, B. Norcross, S. Parker-Stetter, J. Seigle, and T. Sformo. 2015. Fish communities across a spectrum of habitats in the western Beaufort Sea and Chukchi Sea. Progress in Oceanography 136: 115–132. <http://dx.doi.org/10.1016/j.pocean.2015.05.013>

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