﻿108 
  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  

  

  are 
  spread 
  upon 
  the 
  tray 
  it 
  must 
  be 
  drained 
  before 
  being 
  placed 
  in 
  the 
  

   case, 
  for 
  eggs 
  slightly 
  moistened 
  will 
  live 
  for 
  a 
  longer 
  time 
  in 
  open 
  air 
  

   of 
  the 
  right 
  temperature 
  tlian 
  in 
  dead 
  water. 
  The 
  tray 
  is 
  easily 
  

   drained 
  by 
  slightly 
  tipping 
  it, 
  so 
  that 
  the 
  water 
  will 
  run 
  out 
  at 
  the 
  

   edges 
  where 
  the 
  flannel 
  is 
  tacked 
  on 
  the 
  frame. 
  The 
  trays 
  are 
  then 
  

   placed 
  in 
  the 
  case, 
  eighteen 
  filled, 
  the 
  toj) 
  one 
  empty. 
  

  

  If 
  the 
  case 
  is 
  to 
  pass 
  through 
  a 
  varied 
  air 
  temperature, 
  moss 
  is 
  

   packed 
  in 
  the 
  space 
  between 
  the 
  trays 
  of 
  eggs 
  and 
  the 
  sides 
  of 
  the 
  

   shipping-case 
  for 
  protection 
  against 
  abrupt 
  changes 
  in 
  the 
  weather. 
  

  

  When 
  necessary 
  to 
  hold 
  eggs 
  on 
  the 
  trays 
  for 
  any 
  length 
  of 
  time, 
  as 
  

   is 
  often 
  the 
  case, 
  each 
  tray 
  must 
  be 
  taken 
  out 
  and 
  sprinkled 
  with 
  water 
  

   at 
  least 
  every 
  24 
  hours. 
  When 
  they 
  are 
  held 
  for 
  a 
  longer 
  period 
  than 
  

   4 
  or 
  5 
  days 
  they 
  must 
  be 
  taken 
  from 
  the 
  trays 
  and 
  placed 
  in 
  a 
  tub 
  of 
  

   water 
  and 
  there 
  washed 
  in 
  the 
  same 
  manner 
  as 
  described 
  in 
  taking 
  

   spawn. 
  When 
  adding 
  water, 
  care 
  is 
  taken 
  that 
  it 
  does 
  uot 
  strike 
  Mie 
  

   eggs 
  with 
  such 
  force 
  as 
  to 
  injure 
  them, 
  the 
  dipper 
  either 
  being 
  held 
  down 
  

   in 
  the 
  eggs 
  or 
  the 
  water 
  poured 
  against 
  the 
  side 
  of 
  the 
  tub 
  a 
  little 
  above 
  

   the 
  surface 
  of 
  the 
  spawn, 
  which 
  gives 
  them 
  a 
  steady 
  whirling 
  motion 
  

   and 
  at 
  the 
  same 
  time 
  does 
  them 
  no 
  injury. 
  

  

  The 
  manner 
  of 
  transferring 
  eggs 
  from 
  trays 
  to 
  a 
  tub 
  is 
  very 
  simple. 
  

   After 
  filling 
  the 
  tub 
  with 
  water 
  to 
  about 
  a 
  third 
  of 
  its 
  capacity, 
  the 
  

   tray 
  is 
  placed 
  in 
  water 
  at 
  an 
  angle 
  of 
  about 
  45° 
  with 
  its 
  surface. 
  Most 
  

   of 
  the 
  eggs 
  will 
  slide 
  down 
  this 
  incline 
  into 
  the 
  tub, 
  and 
  what 
  few 
  

   remain 
  may 
  be 
  washed 
  down 
  by 
  pouring 
  a 
  little 
  water 
  on 
  the 
  uppermost 
  

   side 
  of 
  the 
  tray. 
  After 
  the 
  eggs 
  have 
  been 
  given 
  a 
  good 
  washing 
  they 
  

   are 
  replaced 
  on 
  the 
  trays 
  and 
  returned 
  to 
  the 
  cases, 
  as 
  described 
  above. 
  

  

  The 
  eggs 
  are 
  shipped 
  in 
  charge 
  of 
  a 
  messenger, 
  if 
  possible, 
  to 
  see 
  that 
  

   the 
  cases 
  are 
  not 
  roughlj^ 
  handled 
  or 
  tilted 
  and 
  the 
  contents 
  jarred 
  or 
  

   bunched 
  while 
  being 
  placed 
  in 
  the 
  baggage 
  car. 
  While 
  on 
  the 
  road 
  

   they 
  must 
  be 
  kept 
  in 
  the 
  coolest 
  place 
  on 
  the 
  car, 
  providing 
  that 
  the 
  

   temi)erature 
  is 
  not 
  below 
  28° 
  or 
  30°. 
  

  

  It 
  can 
  be 
  readily 
  seen 
  that 
  the 
  percentage 
  of 
  lake-trout 
  eggs 
  hatched 
  

   can 
  not 
  be 
  so 
  large 
  as 
  with 
  other 
  species 
  of 
  trout. 
  The 
  rolling 
  and 
  

   pitching 
  of 
  the 
  tugs 
  and 
  other 
  boats 
  upon 
  M^hich 
  the 
  spawn-taker 
  is 
  

   operating 
  prevents 
  the 
  eggs 
  from 
  separating 
  naturally. 
  The 
  time 
  during 
  

   which 
  this 
  should 
  take 
  place 
  would 
  be, 
  approximately, 
  within 
  the 
  first 
  

   30 
  minutes 
  after 
  they 
  are 
  taken, 
  and 
  as 
  the 
  boats 
  are 
  out 
  from 
  5 
  to 
  24 
  

   hours 
  or 
  longer, 
  when 
  shore 
  is 
  reached 
  the 
  time 
  is 
  long 
  past 
  when 
  

   quiet 
  is 
  of 
  any 
  value. 
  Besides, 
  the 
  temperature 
  often 
  falls 
  far 
  below 
  

   freezing, 
  and 
  all 
  the 
  precautions 
  that 
  can 
  be 
  taken 
  will 
  not 
  prevent 
  a 
  

   considerable 
  percentage 
  of 
  the 
  eggs 
  becoming 
  chilled, 
  although 
  there 
  

   may 
  be 
  no 
  ill 
  eifects 
  discovered 
  until 
  after 
  they 
  reach 
  the 
  hatchery. 
  

   Other 
  losses 
  often 
  occur 
  through 
  accident 
  and 
  the 
  carelessness 
  of 
  those 
  

   handling 
  the 
  cases 
  while 
  en 
  route 
  to 
  the 
  hatchery. 
  Taking 
  everything 
  

   into 
  consideration, 
  it 
  may 
  be 
  considered 
  excellent 
  work 
  if 
  an 
  average 
  

   of 
  70 
  per 
  cent 
  of 
  eyed 
  eggs 
  and 
  fry 
  is 
  turned 
  out. 
  In 
  exceptional 
  cases 
  

   as 
  high 
  as 
  90 
  per 
  cent 
  have 
  been 
  hatched. 
  

  

  