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Opportunity at National Oceanic & Atmospheric Administration (NOAA)

Environmental Influences on Vertical Distribution of Age-0 Walleye Pollock

Location

National Marine Fisheries Service, Alaska Fisheries Science Center

RO# Location
26.03.40.B8179 Seattle, WA 98112

Advisers

Name E-mail Phone
Duffy-Anderson, Janet Theresa janet.duffy-anderson@noaa.gov 206.526.6465
Logerwell, Elizabeth Ann libby.logerwell@noaa.gov 206.526.4231

Description

How do environmental variability and ontogenetic development influence vertical positioning of age-0 juvenile pollock, Gadus chalcogrammus, within the water column of the Gulf of Alaska (GOA) coastal ecosystem? Following the highly dispersive planktonic larval phase, age-0 juveniles must reach and remain in favorable habitat for successful recruitment within GOA populations. This critical part of the recruitment process is poorly understood. In the complex baroclinic coastal GOA, vertical positioning affects their exposure to upper ocean currents with consequent effects on transport and retention. Positioning within the water column reflects dynamic fine-scale habitat selection related to thermal preference, feeding ecology, and predation risk. To better understand pollock recruitment dynamics and population structure in the GOA, the objectives of this opportunity are to (1) characterize geographic and inter-annual variability in vertical distributions of post-larval pollock within the GOA prior to winter onset, and (2) identify environmental factors that influence observed vertical patterns. Successful completion of these objectives will improve our understanding of how spatiotemporal changes in environmental conditions impact fine-scale spatial dynamics of an important marine species within the GOA ecosystem.

 

References

Duffy-Anderson JT, et al: The critical first year of life of walleye pollock (Gadus chalcogrammus) in the eastern Bering Sea: Implications for recruitment and future research. Deep-Sea Research II 134: 283-301, 2016

Wilson MT, Mier KL, Jump CM: Effect of region on the food-related benefits to age-0 walleye pollock (Theragra chalcogramma) in association with midwater habitat characteristics in the Gulf of Alaska. ICES Journal of Marine Science 70(7): 1396-1407, 2013 doi:10.1093/icesjms/fst138

 

Keywords:
Fish juveniles; Fisheries oceanography; Recruitment; Spatio-temporal variability; Distribution; Abundance;

Eligibility

Citizenship:  Open to U.S. citizens, permanent residents and non-U.S. citizens
Level:  Open to Postdoctoral and Senior applicants

Stipend

Base Stipend Travel Allotment Supplementation
$58,000.00 $3,000.00

Experience Supplement:
Postdoctoral and Senior Associates will receive an appropriately higher stipend based on the number of years of experience past their PhD.

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