Differentiating wild and farmed salmon

How reliable is human judgement?

This questionnaire has been put together as part of my final year marine biology degree project, to determine if there is a difference between the features used by anglers and fish biologists to differentiate between wild and escaped farmed salmon.

It should take no more than 15 minutes to complete and your participation is both voluntary and anonymous. You may withdraw from this survey at any time. Data will be treated confidentiality and if published, it will not be identifiable as yours.

I would like to thank you for your participation in this survey. For further information please contact Jennifer Murphy-O'Connor at: (jem00049@students.stir.ac.uk or jmurphyoc@gmail.com)

About you

First, please tell me some basic details about yourself:

  • Your age:
    20 or below
    21-35
    36-50
    51-64
    65 and over
  • Occupation in the fishing sector (tick any which apply):
    Angler
    Biological scientist

Section I

  • 1. Please list up the five Scottish rivers (and their locations) where you engage angling and/or for observe salmon as part of your career, starting with your most frequently visited.
  • 2. How many salmon do you catch (retain or release) and/or observe per year as part of your work and/or recreation?
  • 3. What is your level of studies in biology?
    None
    Secondary school (to age 14)
    Secondary school (Standard grade/GCSE)
    Secondary school (Higher grade/A levels)
    Further/higher education (BSc). Please specify below.
    Postgraduate studies (MSc/PhD). Please specify below.
  • 4. I'm trying to collect some information concerning escaped farmed salmon into Scottish rivers. Do you think escaped farmed salmon is a problem?
    Yes
    No
    5. If Yes, please specify which problems you think are of concern:
  • 6. How confident are you at identifying the salmon that you catch, with respect to its farmed or wild origin? Please choose one of the four options:
    I cannot, under any condition, identify the salmon correctly.
    I can sometimes identify the salmon correctly.
    I can usually identify the salmon correctly.
    I can always identify the salmon correctly.
  • 7. Do you think you have ever caught an escaped farmed salmon?
    Yes
    No
    8. If yes, could you please provide approximate details such as when, where and how you knew it was a farmed fish (including contacting a fish biologist)?
  • 9. In differentiating farmed and wild salmon, do you use instinct (gut feeling)?
    Yes
    No
    Not applicable

    10. Do you use specific cues to differentiate between them?
    Yes
    No
    Not applicable

    11. If yes, which cues do you use? Please number the features from 1 to 10 in order of observation, being 1 the first feature to use and 10 the last one.
     Head shape
     Colour
     Fins
     Spots
     Scales
     Gill cover
     Tail
     Girth*
     Weight
     Other: 
    *Measurement from fish's belly to dorsal fin.
    12. For your choice of the first feature, why did you consider it the most important?

Section II: Spot the difference

Below there is a mix of photographs of wild and farmed salmon. Please do your best to determine which are farmed and which are wild, indicating what features led you to come to this conclusion.

  • Fish #1

    Sample fish number 1

    Do you think this fish is:

    Most likely wild     Maybe wild     Maybe farmed     Most likely farmed    

    What led you to this conclusion?


    Fish #2

    Sample fish number 2

    Do you think this fish is:

    Most likely wild     Maybe wild     Maybe farmed     Most likely farmed    

    What led you to this conclusion?


    Fish #3

    Sample fish number 3

    Do you think this fish is:

    Most likely wild     Maybe wild     Maybe farmed     Most likely farmed    

    What led you to this conclusion?


    Fish #4

    Sample fish number 4

    Do you think this fish is:

    Most likely wild     Maybe wild     Maybe farmed     Most likely farmed    

    What led you to this conclusion?


    Fish #5

    Sample fish number 5

    Do you think this fish is:

    Most likely wild     Maybe wild     Maybe farmed     Most likely farmed    

    What led you to this conclusion?


    Fish #6

    Sample fish number 6

    Do you think this fish is:

    Most likely wild     Maybe wild     Maybe farmed     Most likely farmed    

    What led you to this conclusion?


And finally

  • Do you have any further comments to add?

    Please tick here if you would like to receive a copy of the results of this survey.
    Yes please.

    Please tick here if you would like to know more about escaped farmed salmon and wild salmon and how to tell the difference?.
    Yes please.

    Please tick here if you are willing to be contacted in any follow up to this survey.
    Yes please.

    If you wish to allow yourself to be contacted, please leave your details below.
     Your name
     Your email address
     Your phone or mobile phone number
  • That's everything. Thank you for your input. Please press the submit button below to send us your comments!
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