Generic selectors
Exact matches only
Search in title
Search in content
Post Type Selectors

The Mystery of Sablefish Survival

Jul 17, 2014 | Uncategorized | 0 comments

GOAIERP scientists study what environmental conditions and habitats are important in sablefish survival

In 2008, a team of scientists at the Auke Bay Laboratories initiated several dedicated research projects aimed at understanding ecological and management issues concerning Alaska sablefish (Anoplopoma fimbria). One of these projects is led by Dr. Kalei Shotwell and deals specifically with exploring the driving mechanisms surrounding the highly variable and uncertain survival of young sablefish.  The project began with two main goals: 1) determine if an index of young sablefish could be created from historical data and 2) investigate whether measures of the environment can be used in a model to predict the survival of these young fish. Toward the first goal, Dr. Shotwell collected the available data from short-term surveys and found that it was not consistent enough in space and time to be used within the current sablefish assessment model. However, the information can be used for helping understand the best habitat for young sablefish to settle upon after their long journey to the nearshore. Dr. Shotwell along with Dr. Jodi Pirtle of the Benthic Habitat Project will be using this information to develop habitat suitability models and maps to characterize the nearshore benthic habitat for sablefish and the other focal species. These maps will be used by several components of the GOA Project, specifically the modeling component to inform their individual based model trajectories.

 

The search for environmental predictors for the second goal of Dr. Shotwell’s sablefish project has led to investigating ways to include environmental information in stock assessment. The first breakthrough was the discovery of a relationship between the North Pacific Polar Front and sablefish survival (Shotwell et al. 2014). Colder than average wintertime measures of this large-scale ocean feature in the central North Pacific were found to create good survival conditions for young sablefish. This relationship led Dr. Shotwell and her co-authors (Dr. Dana Hanselman and Dr. Igor Belkin) to put forward a conceptual model of sablefish early-life survival which was termed the ODDS model for Ocean Domain Dynamic Synergy. It is basically a description of the pressures that might influence the survival of young sablefish as they journey from where they are born in the deep ocean slope, through their ride on the waves of the ocean gauntlet, and finally as they settle to their habitat homes in the nearshore. Answering the “What are the Odds?” question for sablefish has led Dr. Shotwell to work with several researchers (GOA Project included) to consider the influence of other environmental measures such as mesoscale eddies, upwelling, freshwater output, nearshore production, pink salmon competitors, and seabird predators. The results of these projects are forthcoming and when completed Dr. Shotwell plans to work with the lead authors of these projects to collect the relevant indicators that will serve as time series that support the ODDS model of early-life survival. These indicators will be compiled in an annual graphical report card to be included in the individual stock assessment reports. The sablefish ODDS report card may be used to assist scientists and managers in understanding what may influence sablefish survival and also visually see the changes of these environmental indicators over time.

 

Literature Cited:

Shotwell, S.K., D.H. Hanselman, and I.M. Belkin. 2014. Toward biophysical synergy: Investigating advection along the Polar Front to identify factors influencing Alaska sablefish recruitment. Deep-Sea Reaserch II. Special Issue, Fronts, Fish and Top Predators. http://dx.doi.org/10.1016/j.dsr2.2012.08.024. 

https://nprb.buzzworthy.biz/wp-content/uploads/2021/03/kalei.jpg

0 Comments

Submit a Comment

Your email address will not be published.

Recent Comments

    WHo we are
    GENERAL INFO

    Established in 2001, NPRB is a marine research organization that supports pressing fishery management issues or marine ecosystem needs.

    REPORTS & PUBLICATIONS

    More than 600 peer-reviewed publications have been produced through NPRB-funded research. Browse our library and our reports here.

    LEADERSHIP

    NPRB comprises a 20 member Board, representing Federal, State, and other entitites while receiving advice from Science and Advisory Panels.

    PARTNERSHIPS

    Looking to partner with NPRB? NPRB welcomes partnerships to co-fund research in areas of common interest and across its programs.

    OUTREACH & ENGAGEMENT

    NPRB communicates and engages with a broad and diverse set of Alaskan stakeholders and audiences, from coastal communities to academia.

    STAFF

    NPRB staff support the Board, Science, and Advisory Panels for funding decisions, science priorities, recommendations, and program management.

    Funding Available

    The Core Program offers year-round funding with flexible rolling submission options.

    SUBMIT YOUR RESEARCH PRIORITIES

    NPRB staff begins developing draft research priorities for the Core Program in late July and August. Submit before July 2nd to be considered for the current year’s RFP development. 

    Our Programs
    INTEGRATED ECOSYSTEM PROGRAMS
    SCIENCE FOUNDATION

    NPRB maintains scientific programs designed to address pressing fishery management issues and Alaska marine ecosystem information needs.

    CORE PROGRAM

    NPRB supports a competitive, peer-reviewed annual request for proposal (RFP) process dedicated to marine research in Alaskan waters.

    The Arctic Integrated Ecosystem Reserach Program looked at how physical changes in the ocean influence the flow of energy through the marine food web in the Bering Strait, Chukchi Sea, and western Beaufort Sea from 2017-2021.

    OUTREACH PROGRAM

    Supporting science communication, engagement, outreach, and education initiatives for all our research programs.

    LONG-TERM MONITORING

    This program supports new or existing time-series research that enhance the ability to understand the current state of marine ecosystems.

    The Bering Sea Project, a partnership between the North Pacific Research Board and the National Science Foundation, sought to understand the impacts of climate change and dynamic sea ice cover on the eastern Bering Sea ecosystem.

    INTEGRATED ECOSYSTEM RESEARCH

    These are large-scale interdisciplinary ecosystem-based programs, requiring multiple agency coordination, collaboration, and investigation.

    GRADUATE STUDENT RESEARCH AWARDS

    NPRB supports next generation scientists, researchers, and resource managers to further their studies in relevant fields of marine science and to our mission.

    The Gulf of Alaska Project tested three main hypotheses about the survival and recruitment of five focal groundfish species (Pacific cod, Pacific ocean perch, walleye pollock, arrowtooth flounder, sablefish) during their first year of life.

    About NPRB
    • Menu Item 1
    • Menu Item 2
    • Menu Item 3
    • Menu Item 4
    • Menu Item 5
    • Menu Item 6
    • Menu Item 7

    Title Goes Here

    Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the

    Title Goes Here

    Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the