﻿82 
  

  

  OTTER- 
  TKAWL 
  FISHERY. 
  

  

  power 
  as 
  measured 
  by 
  the 
  increase 
  in 
  average 
  tonnage 
  and 
  general 
  

   efTiciency. 
  

  

  Such 
  improvement 
  in 
  the 
  average 
  yield 
  as 
  has 
  been 
  noted 
  was 
  due 
  

   to 
  round 
  fishes 
  alone, 
  the 
  average 
  yield 
  of 
  that 
  class 
  in 
  1912 
  having 
  

   increased 
  about 
  55 
  per 
  cent. 
  Flat 
  fishes 
  in 
  1912 
  exhibited 
  a 
  loss 
  of 
  

   79 
  per 
  cent 
  as 
  compared 
  with 
  1891, 
  and 
  the 
  decrease 
  was 
  continuous 
  

   between 
  those 
  years 
  with 
  the 
  exception 
  of 
  a 
  small 
  increase 
  between 
  

   1901 
  and 
  1903. 
  

  

  Average 
  Catch 
  of 
  Certain 
  Species 
  per 
  Annum 
  per 
  Steam 
  Otter 
  Trawler 
  on 
  

   THE 
  East 
  Coast 
  of 
  Scotland 
  During 
  the 
  First 
  and 
  Last 
  Years 
  of 
  Certain 
  

   Periods. 
  

  

  Species 
  and 
  periods. 
  

  

  Quantity 
  (hundred- 
  

   weight) 
  during— 
  

  

  First 
  year. 
  

  

  Last 
  year. 
  

  

  Increase 
  or 
  decrease. 
  

  

  Hundred- 
  

   weight. 
  

  

  Per 
  cent. 
  

  

  Cod: 
  

  

  1891-1898 
  

  

  1898-1901 
  

  

  1901-1903 
  

  

  1903-1906 
  

  

  1906-1912 
  

  

  1891-1912 
  

  

  Haddock: 
  

  

  1891-1898 
  

  

  1898-1901 
  

  

  1901-1903 
  

  

  1903-1906 
  

  

  1906-1912 
  

  

  1891-1912 
  

  

  Halibut: 
  

  

  1891-1898 
  

  

  1898-1901 
  

  

  1901-1903 
  

  

  1903-1906 
  

  

  1906-1912 
  

  

  1891-1912 
  

  

  Flounders, 
  plaice, 
  and 
  brill: 
  

  

  1891-1898 
  

  

  1898-1901 
  

  

  1901-1903 
  

  

  1903-1906 
  

  

  1906-1912 
  

  

  1891-1912 
  

  

  Skate: 
  

  

  1891-1898 
  

  

  1898-1901 
  

  

  1901-1903 
  

  

  1903-1906 
  

  

  1906-1912 
  

  

  1891-1912 
  

  

  559 
  

   1,149 
  

  

  799 
  

   1,142 
  

   1,171 
  

  

  559 
  

  

  2,617 
  

   3,202 
  

   2,781 
  

   3,027 
  

   3,330 
  

   2,617 
  

  

  .56 
  

  

  .56 
  

  

  851 
  

   309 
  

   369 
  

   317 
  

   205 
  

   851 
  

  

  131 
  

   77 
  

   100 
  

   122 
  

   156 
  

   131 
  

  

  1,149 
  

   799 
  

   1,142 
  

   1,771 
  

   1,864 
  

   1,864 
  

  

  3,202 
  

   2,781 
  

   3,027 
  

   3,330 
  

   1,533 
  

   1,533 
  

  

  10 
  

   26 
  

   27 
  

   48 
  

   26 
  

   26 
  

  

  309 
  

   369 
  

   317 
  

   205 
  

   114 
  

   114 
  

  

  77 
  

   100 
  

   122 
  

   156 
  

   162 
  

   162 
  

  

  + 
  590 
  

   - 
  350 
  

   -t- 
  343 
  

  

  629 
  

   93 
  

  

  -t-1,305 
  

  

  -f- 
  585 
  

   - 
  421 
  

   + 
  246 
  

   + 
  303 
  

  

  -1,797 
  

   -1,084 
  

  

  9.5 
  

   16 
  

  

  1 
  

   21 
  

   22 
  

   25 
  

  

  542 
  

  

  60 
  

  

  52 
  

   112 
  

  

  91 
  

   737 
  

  

  54 
  

   23 
  

   22 
  

   34 
  

   6 
  

   31 
  

  

  105 
  

   30 
  

   43 
  

   55 
  

   5 
  

  

  233 
  

  

  22 
  

   13 
  

  

  9 
  

   10 
  

   54 
  

   41 
  

  

  -f 
  1,696 
  

   -f 
  160 
  

   + 
  4 
  

  

  4 
  77 
  

  

  - 
  45 
  

   -f4,542 
  

  

  - 
  64 
  

   -f 
  20 
  

  

  - 
  14 
  

  

  - 
  35 
  

  

  - 
  44 
  

  

  An 
  analysis 
  of 
  the 
  foregoing 
  table 
  shows 
  that 
  the 
  cod 
  was 
  the 
  

   chief 
  contributor 
  to 
  the 
  increase 
  in 
  round 
  fishes, 
  increasing 
  23-3 
  per 
  

   cent. 
  This 
  species 
  supplanted 
  the 
  haddock 
  in 
  1912 
  as 
  the 
  most 
  im- 
  

   portant 
  round 
  fish, 
  although 
  the 
  latter 
  maintained 
  its 
  quantitative 
  

   supremacy 
  in 
  decreasing 
  ratio 
  to 
  1906. 
  The 
  average 
  catch 
  of 
  had- 
  

   dock 
  underwent 
  various 
  vicissitudes 
  of 
  increase 
  and 
  decrease, 
  but 
  

   showed 
  a 
  net 
  decrease 
  of 
  41 
  per 
  cent 
  for 
  the 
  period 
  as 
  a 
  whole. 
  

   Eliminating 
  the 
  subperiod 
  1906 
  to 
  1912, 
  there 
  was 
  a 
  net 
  increase 
  of 
  

  

  