﻿20 
  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  

  

  At 
  Baird 
  eggs 
  kept 
  in 
  water 
  averaging 
  about 
  54° 
  F. 
  hatch 
  in 
  35 
  days. 
  

   The 
  allowance 
  of 
  5 
  days' 
  difference 
  in 
  the 
  time 
  of 
  hatching 
  for 
  each 
  

   degree 
  of 
  change 
  in 
  the 
  temperature 
  of 
  the 
  water 
  is 
  approximately 
  

   correct. 
  

  

  For 
  the 
  first 
  few 
  days 
  the 
  eggs 
  of 
  the 
  quinnat 
  salmon 
  are 
  very 
  hardy, 
  

   and 
  at 
  this 
  time 
  they 
  should 
  be 
  thoroughly 
  picked 
  over 
  and 
  the 
  dead 
  

   ones 
  removed 
  as 
  far 
  as 
  possible 
  before 
  the 
  delicate 
  stage 
  during 
  the 
  

   formation 
  of 
  the 
  spinal 
  column 
  comes 
  on, 
  so 
  that 
  during 
  that 
  critical 
  

   period 
  they 
  may 
  be 
  left 
  in 
  perfect 
  quiet. 
  As 
  soon 
  as 
  the 
  spinal 
  column 
  

   and 
  the 
  head 
  show 
  plainly, 
  the 
  eggs 
  are 
  hardy 
  enough 
  to 
  ship, 
  but 
  when 
  

   there 
  is 
  time 
  enough 
  it 
  is 
  better 
  to 
  wait 
  a 
  day 
  or 
  two 
  until 
  the 
  eye-spot 
  

   is 
  distinctly 
  visible, 
  after 
  which 
  time 
  the 
  eggs 
  will 
  stand 
  handling. 
  

  

  PACKING 
  EGGS 
  FOR 
  SHIPMENT. 
  

  

  The 
  packing-box 
  used 
  in 
  shipping 
  salmon 
  eggs 
  is 
  made 
  of 
  ^-inch 
  

   pine, 
  2 
  feet 
  square 
  and 
  1 
  foot 
  deep. 
  At 
  the 
  bottom 
  is 
  placed 
  a 
  thick 
  

   layer 
  of 
  moss, 
  then 
  a 
  layer 
  of 
  mosquito 
  netting, 
  then 
  a 
  layer 
  of 
  eggs, 
  

   then 
  mosquito 
  netting 
  again, 
  then 
  successive 
  layers 
  of 
  moss, 
  netting, 
  

   eggs, 
  netting, 
  and 
  so 
  on 
  to 
  the 
  middle 
  of 
  the 
  box. 
  Here 
  a 
  firm 
  wooden 
  

   partition 
  is 
  fastened 
  in 
  and 
  the 
  packing 
  renewed 
  above 
  in 
  the 
  same 
  

   manner 
  as 
  below. 
  The 
  cover 
  is 
  then 
  laid 
  on 
  the 
  top, 
  and 
  when 
  two 
  

   boxes 
  are 
  ready 
  they 
  are 
  placed 
  in 
  a 
  wooden 
  crate, 
  made 
  large 
  enough 
  

   to 
  allow 
  a 
  space 
  of 
  3 
  inches 
  on 
  all 
  sides 
  of 
  the 
  boxes. 
  This 
  space 
  is 
  

   filled 
  with 
  hay 
  to 
  protect 
  the 
  eggs 
  against 
  changes 
  of 
  temperature, 
  and 
  

   when 
  the 
  cover 
  is 
  put 
  on 
  the 
  eggs 
  are 
  ready 
  to 
  ship. 
  

  

  In 
  the 
  middle 
  of 
  the 
  crate 
  an 
  open 
  space 
  about 
  4 
  inches 
  in 
  depth 
  is 
  

   left, 
  between 
  the 
  two 
  boxes 
  of 
  eggs, 
  for 
  ice. 
  As 
  soon 
  as 
  the 
  crates 
  

   arrive 
  at 
  the 
  railway 
  station 
  this 
  space, 
  as 
  well 
  as 
  the 
  top 
  of 
  the 
  crate, 
  

   is 
  filled 
  in 
  with 
  ice. 
  Eecent 
  experiments 
  show 
  that 
  salmon 
  eggs 
  can 
  be 
  

   packed 
  and 
  safely 
  transported 
  to 
  considerable 
  distances 
  when 
  they 
  are 
  

   first 
  taken. 
  

  

  CARE 
  OF 
  THE 
  FRY. 
  

  

  The 
  eggs 
  of 
  quinnat 
  salmon, 
  like 
  those 
  of 
  other 
  Salmonidce, 
  hatch 
  

   very 
  gradually 
  at 
  first, 
  only 
  a 
  small 
  proportion 
  of 
  fish 
  coming 
  out 
  the 
  

   first 
  day. 
  The 
  number 
  increases 
  daily, 
  however, 
  until 
  the 
  climax 
  of 
  

   the 
  hatching 
  is 
  reached, 
  when 
  large 
  numbers 
  of 
  the 
  young 
  burst 
  their 
  

   shells 
  in 
  a 
  single 
  day. 
  At 
  this 
  time 
  great 
  care 
  and 
  vigilance 
  are 
  

   required. 
  The 
  vast 
  number 
  of 
  shells 
  rapidly 
  clog 
  up 
  the 
  guard-screens 
  

   at 
  the 
  outlet 
  of 
  the 
  troughs, 
  which 
  should 
  be 
  kept 
  as 
  free 
  as 
  possible 
  

   by 
  thoroughly 
  cleansing 
  them 
  from 
  time 
  to 
  time. 
  

  

  In 
  the 
  deep 
  trays 
  the 
  newly 
  hatched 
  fish 
  are 
  mixed 
  with 
  unhatched 
  

   eggs, 
  and 
  the 
  advantage 
  of 
  the 
  oblong 
  mesh 
  in 
  the 
  bottom 
  of 
  the 
  trays 
  

   becomes 
  apparent. 
  This 
  mesh 
  is 
  too 
  narrow 
  to 
  allow 
  the 
  eggs 
  to 
  fall 
  

   through, 
  buifc 
  the 
  hatched 
  fish, 
  being 
  comparatively 
  long 
  and 
  narrow, 
  

   easily 
  slip 
  down 
  through 
  the 
  long 
  meshes 
  into 
  the 
  space 
  below. 
  They 
  

   should 
  be 
  assisted 
  m 
  accomplishing 
  this 
  by 
  gently 
  raising 
  and 
  lowering 
  

  

  