﻿OTTEE-TRAWL 
  FISHERY. 
  

  

  87 
  

  

  Unfortunately 
  the 
  various 
  classes 
  of 
  lines, 
  " 
  great," 
  '* 
  small," 
  and 
  

   " 
  hand," 
  while 
  all 
  exhibiting 
  heavy 
  decreases, 
  did 
  not 
  maintain 
  their 
  

   ratios 
  to 
  one 
  another, 
  and 
  as 
  they 
  differ 
  materially 
  in 
  their 
  fishing 
  

   power 
  unit 
  of 
  length 
  and 
  as 
  the 
  catch 
  of 
  each 
  was 
  not 
  separately 
  

   recorded 
  in 
  the 
  reports, 
  it 
  is 
  unsafe 
  to 
  venture 
  conclusions 
  on 
  the 
  

   data 
  available. 
  

  

  Steam 
  liners 
  use 
  more 
  nearly 
  one 
  class 
  of 
  gear, 
  great 
  lines 
  ; 
  and 
  as, 
  

   so 
  far 
  as 
  the 
  statistics 
  show, 
  the 
  other 
  kinds 
  of 
  lines 
  were 
  used 
  in 
  

   negligible 
  quantities, 
  the 
  statistics 
  of 
  those 
  vessels 
  are 
  more 
  nearly 
  

   comparable 
  in 
  the 
  several 
  years, 
  and 
  afford 
  the 
  only 
  basis 
  for 
  a 
  

   comparative 
  study 
  of 
  the 
  intensity 
  of 
  the 
  line 
  fishery. 
  

  

  Length 
  of 
  Trawl 
  Lines 
  Fished 
  by 
  Steam 
  Vessels 
  on 
  the 
  East 
  Coast 
  of 
  

   Scotland 
  During 
  the 
  First 
  and 
  Last 
  Years 
  of 
  Certain 
  Periods. 
  

  

  While 
  the 
  total 
  length 
  of 
  lines 
  fished 
  on 
  the 
  east 
  coast 
  of 
  Scotland 
  

   was 
  decreasing, 
  the 
  length 
  of 
  the 
  lines 
  used 
  by 
  steam 
  vessels 
  was 
  

   steadily 
  and 
  rapidly 
  growing, 
  but 
  it 
  was 
  not 
  until 
  after 
  1903 
  that 
  it 
  

   exceeded 
  10 
  per 
  cent 
  of 
  the 
  total. 
  In 
  1906 
  it 
  comprised 
  over 
  15 
  per 
  

   cent, 
  and 
  in 
  1912 
  about 
  35 
  per 
  cent. 
  This 
  kind 
  of 
  line 
  was 
  undoubt- 
  

   edly 
  more 
  effective 
  per 
  unit 
  of 
  length 
  than 
  that 
  fished 
  from 
  the 
  sail- 
  

   ing 
  vessels, 
  and 
  the 
  catch 
  of 
  steam 
  liners 
  should 
  be 
  separately 
  con- 
  

   sidered, 
  but 
  unfortunately 
  the 
  landings 
  of 
  these 
  vessels 
  were 
  not 
  

   separately 
  recorded 
  until 
  1906. 
  

  

  Total 
  Quantities 
  of 
  Demersal 
  Fishes 
  Taken 
  by 
  Steam 
  Liners 
  on 
  the 
  East 
  

   Coast 
  of 
  Scotland 
  in 
  1906 
  and 
  1912, 
  Respectively. 
  

  

  o 
  Includes 
  fishes 
  classified 
  since 
  1903. 
  

  

  