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SFCC scale reading quiz solutions

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Solutions to the SFCC scale reading quiz available for SFCC members at www.sfcc.co.uk

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SFCC scale reading quiz solutions

  1. 1. Q 1.1: How many sea winters are there on this scale? Image from: 1931 Salmon of the R Dee (Kirkcudbright), plate I R. Dee 18th July 1928
  2. 2. R. Dee 18th July 1928 Sea winters on this scale Image from: 1931 Salmon of the R Dee (Kirkcudbright), plate I 1 sea winter
  3. 3. July 1995 Q 2.1: How many sea winters are there on this scale?
  4. 4. July 1995 Sea winters on this scale July 1995 55lbs, Namsen Fjord, Norway 1 sea winter 2 sea winter 3 sea winter 4 sea winter
  5. 5. R. Add 15th Aug 1913 Q 3.1: How many sea winters are there on this scale? Image from: 1914 Plate III fig 2
  6. 6. R. Add 15th Aug 1913 Sea winters on this scale Image from: 1914 Plate III fig 2 1 sea winter 2 sea winter 3 sea winter as spawning mark
  7. 7. Q 1.1: Where is / are the sea-winters on this scale? Q 1.2: Is the growth at the edge open or closed? A B C R. Tweed 29.07.1998 60cms, 4lbs
  8. 8. R. Tweed 29.07.1998 60cms, 4lbs Reading : x.1+open 1st sea summer 2nd sea summer Open growth at edge 1st sea winter
  9. 9. R. Tweed 16.11.1998 10lbs Q 1.1: Where is / are the sea-winters on this scale? Q 1.2: Is the growth at the edge open or closed? A B C
  10. 10. 1st sea summer 2nd sea summer Closing growth at edge Reading : x.1+closing 1st sea winter R. Tweed 16.11.1998 10lbs
  11. 11. R Tweed 02.05.1994 86cm, 13 lbs Q 7.1: Where is / are the sea-winters before the spawning mark? Q 7.2: Is the growth at the edge of the scale open or closed? A B C Spawningmark
  12. 12. R. Tweed 02.05.1994 86cm, 13 lbs Reading: x.1.sm.1 3 sea summer 1st sea winter Spawning mark (sm) 3rd sea winter 1 sea summer Note: the spawning mark represents the 2nd sea winter 2 sea summer
  13. 13. R. Add, Argyll 20.02.1913 Kelt, 10lbs Q 8.1: How many spawning marks are there on this scale? Q 8.2: How many river winters are there on this scale?
  14. 14. Reading: 2.1.2sm.1 or 2.1.sm.sm.1* 1 sea summer 2 sea summer 3 sea summer R. Add, Argyll 20.02.1913 Kelt, 10lbs 4 sea summer 2 sm 1 sm 1 sea winter 1st river winter 2nd river winter * As this scale was taken after the 1st of January, the final open & closed growth bands make a full year rather than being .+closing 4 sea winter Could become 3rd sm
  15. 15. 20.02.1913 Kelt, 10lbs This fish was caught the year before as well and scales from both captures are shown here: 24.02.1912 Kelt, 8lbs Q 9.1: Where is the old edge of the 1912 scale on the 1913 scale? Q 9.2: How many river winters are there on the 1913 scale? A B C R. Add, Argyll
  16. 16. 20.02.1913 Kelt, 10lbs 24.02.1912 Kelt, 8lbs 1st Sea-winter 1st spawning mark Old edge becomes 2nd spawning mark 1 river winter 2 river winter
  17. 17. R. Tweed 16.02.1999 92cm 15lbs Q 10.1: How many sea-winters are there on this scale ? Q 10.2: How many river winters are there on this scale
  18. 18. 2.3 1 sea winter 2 sea winter 2 river winter 1 river winter R. Tweed 16.02.1999 92cm 15lbs 3 sea winter
  19. 19. 18.10.91 63cm, 5lbs, Q 11.1: Where is the transition from river to sea on this scale ? Q 11.2: Is the growth at the edge open or closed ? ABC
  20. 20. R Tweed 18.10.91 63cm, 5lbs, 3.1+o 1st sea winter Transition Open growth around most of edge
  21. 21. R. Tweed 27.03.1995 12lbs 80cms Q 12.1: What is the reading of the marine phase of this scale?
  22. 22. x.1.sm.1 1st sea winter Spawning mark 1 summer & 1 winter after the spawning mark = 1 year R. Tweed 27.03.1995 12lbs 80cms
  23. 23. R. Tweed 19.11.2003 14lbs Q 13.1: How many sea winters are there on this scale ? Q 13.2: Is the growth at the edge open or closed ?
  24. 24. R. Tweed 19.11.2003 14lbs 1st sea winter 2nd sea winter Open growth at edge 2.2+o
  25. 25. A: Grilse or Salmon? 16.02.1999 10.11.1998 16.11.1998 B: Grilse or Salmon? D: Grilse or Salmon?C: Grilse or Salmon? 29.07.98
  26. 26. A: 2.2 Salmon 16.02.1999 92cm 15lbs 16.11.1998 10lbs 29.07.98 60cm 4lbs B: 1.1+cl Grilse C: 2.1+cl Grilse D: 1.1+o Grilse 10.11.1998 8lbs In the Autumn, the closing growth at the edge of a scale gives a Grilse a similar pattern to that of a 2SW fish
  27. 27. Q 15.1: How many winters is / are there in this freshwater phase? Q 15.2: Is there run out after the final river winter?
  28. 28. 1 river winter 2 river winter 0 run-out
  29. 29. Q 16.1: How many winters is / are there in this freshwater phase?
  30. 30. 1 River winter 2 River winter 3 River winter
  31. 31. Q 17.1: How many winters is / are there in this freshwater phase?
  32. 32. 1 River winter 2 River winter
  33. 33. Q 19.1: How many winters are there in this freshwater phase? Image from: movements in the sea Fig 1 (note: original reading was incorrect)
  34. 34. Image from: movements in the sea Fig 1 (note: original reading was incorrect) 1 River winter 2 River winter 3 River winter

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