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Shifting Distributions and Population Dynamics​

 

 

Given the capacity for many fish to respond to changing ocean conditions by changing their geographic extent and/or depth ranges, fisheries ecology must incorporate spatial analyses that compliment abundance estimates. Work within CFER is addressing these research needs and projects under my supervision include:

 

  • The abundance and spatial distribution of gadoids in NAFO 3Ps (led by Hilary Rockwood).
     

  • The distributional dynamics of deep sea fishes (led by Brynn Devine).
     

  • Brynn Devine also led a study of ‘First records of the blue runner (Perciformes: Carangidae) in Newfoundland waters’ which reported recent, unusual occurrences of this southern fish in our waters (see Publications).

Collaborative research is also ongoing on Atlantic halibut: distribution, migrations and habitat use in the Gulf of St. Lawrence.

 

There is a need for new baseline biological information for developing stock assessment tools and improving management strategies for Atlantic halibut in the Gulf of St. Lawrence. Jon is working on a satellite tagging project with fellow CFER scientist Dr. Dominique Robert (lead PI), CFER postdoctoral fellow Dr. Hannah Murphy, DFO Science and FFAW scientists, harvesters and international collaborators, to provide new insights on the dynamics of this valuable stock. By collecting tracks of temperature and depth at high resolution, satellite tags record important behavioural traits and facilitate the reconstruction of seasonal migrations of individual fish over a full year.

 

The video below documents some of our collaborative halibut research from 2014:

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