﻿76 
  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  

  

  is 
  poured 
  off 
  and 
  clear 
  water 
  is 
  put 
  in 
  the 
  pan, 
  in 
  which 
  the 
  eggs 
  are 
  

   allowed 
  to 
  remain 
  until 
  they 
  separate, 
  which 
  will 
  be 
  in 
  from 
  15 
  to 
  45 
  

   minutes, 
  depending 
  on 
  the 
  temperature 
  of 
  the 
  water. 
  It 
  is 
  preferable 
  

   to 
  take 
  the 
  eggs 
  to 
  the 
  hatchery 
  before 
  the 
  milt 
  and 
  water 
  are 
  poured 
  

   off, 
  and 
  there 
  rinse 
  them 
  oft" 
  and 
  place 
  them 
  directly 
  on 
  the 
  hatching- 
  

   trays 
  (previously 
  arranged 
  in 
  the 
  troughs) 
  and 
  then 
  allow 
  them 
  to 
  

   separate. 
  In 
  freezing 
  weather 
  it 
  is 
  advisable 
  to 
  strip 
  the 
  eggs 
  in 
  water 
  

   or 
  to 
  use 
  two 
  pans, 
  one 
  set 
  in 
  the 
  other, 
  with 
  water 
  in 
  the 
  bottom 
  pan 
  

   to 
  prevent 
  the 
  eggs 
  from 
  being 
  chilled. 
  

  

  In 
  taking 
  spawn 
  the 
  manipulation 
  of 
  the 
  fish 
  without 
  injury 
  is 
  a 
  very 
  

   delicate 
  and 
  exacting 
  task, 
  full 
  knowledge 
  of 
  which 
  can 
  only 
  be 
  

   acquired 
  by 
  experience, 
  as 
  it 
  is 
  difiicult 
  to 
  squeeze 
  the 
  spawn 
  from 
  the 
  

   fish 
  without 
  injuring 
  or 
  even 
  killing 
  it. 
  In 
  taking 
  hold 
  of 
  the 
  fish 
  in 
  

   the 
  spawning-tub 
  the 
  operator 
  catches 
  it 
  by 
  the 
  head 
  with 
  the 
  right 
  

   hand, 
  the 
  back 
  of 
  the 
  hand 
  being 
  up, 
  and 
  at 
  the 
  same 
  time 
  slips 
  the 
  

   left 
  hand 
  under 
  the 
  fish 
  and 
  grasps 
  it 
  near 
  the 
  tail, 
  between 
  the 
  anal 
  

   and 
  caudal 
  fins. 
  A 
  fish 
  caught 
  in 
  this 
  way 
  can 
  be 
  easily 
  turned 
  over 
  

   as 
  it 
  is 
  brought 
  out 
  of 
  the 
  water, 
  so 
  that 
  its 
  abdomen 
  is 
  up 
  and 
  in 
  the 
  

   proi)er 
  position 
  for 
  spawning 
  by 
  the 
  time 
  the 
  spawning-pan 
  is 
  reached. 
  

   If 
  the 
  fish 
  struggles 
  it 
  must 
  be 
  held 
  firmly, 
  but 
  gently, 
  until 
  it 
  becomes 
  

   quiet, 
  and 
  when 
  held 
  in 
  the 
  right 
  position 
  it 
  will 
  struggle 
  only 
  for 
  a 
  

   moment. 
  A 
  large 
  fish 
  may 
  be 
  held 
  with 
  its 
  head 
  under 
  the 
  right 
  arm. 
  

  

  When 
  the 
  struggle 
  is 
  over 
  the 
  right 
  hand 
  is 
  passed 
  down 
  the 
  abdo- 
  

   men 
  of 
  the 
  fish 
  until 
  a 
  point 
  midway 
  between 
  the 
  pectoral 
  and 
  ventral 
  

   fins 
  is 
  reached, 
  then 
  with 
  the 
  thumb 
  and 
  index 
  finger 
  the 
  abdomen 
  is 
  

   pressed 
  gently, 
  and 
  at 
  the 
  same 
  time 
  the 
  hand 
  is 
  slipped 
  toward 
  the 
  

   vent. 
  If 
  the 
  eggs 
  are 
  ready 
  to 
  be 
  taken 
  they 
  will 
  come 
  freely 
  and 
  

   easily, 
  and 
  if 
  they 
  do 
  not, 
  the 
  fish 
  is 
  put 
  back 
  in 
  the 
  pond 
  until 
  ready 
  to 
  

   spawn. 
  If 
  the 
  eggs 
  come 
  freely 
  from 
  the 
  first 
  pressure 
  the 
  operation 
  

   is 
  repeated, 
  beginning 
  at 
  or 
  near 
  the 
  ventral 
  fin. 
  

  

  After 
  the 
  first 
  pressure 
  has 
  been 
  given, 
  by 
  holding 
  the 
  head 
  of 
  the 
  

   fish 
  higher 
  than 
  the 
  tail, 
  all 
  of 
  the 
  eggs 
  that 
  have 
  fallen 
  from 
  the 
  

   ovaries 
  and 
  are 
  ready 
  to 
  be 
  expressed 
  will 
  fall 
  into 
  the 
  abdomen, 
  near 
  

   the 
  vent, 
  so 
  that 
  it 
  will 
  not 
  be 
  necessary 
  to 
  press 
  the 
  fish 
  again 
  over 
  

   its 
  vital 
  parts, 
  the 
  eggs 
  having 
  left 
  that 
  portion 
  of 
  the 
  body. 
  All 
  of 
  

   the 
  eggs 
  that 
  have 
  fallen 
  into 
  the 
  abd<imen 
  below 
  the 
  ventral 
  fin 
  can 
  

   be 
  easily 
  ejected 
  without 
  danger 
  of 
  injury 
  to 
  the 
  fish, 
  caused 
  by 
  unnec- 
  

   essary 
  pressure 
  over 
  its 
  important 
  organs 
  after 
  the 
  eggs 
  have 
  left 
  that 
  

   part 
  of 
  the 
  body. 
  If 
  these 
  directions 
  are 
  judiciously 
  and 
  carefully 
  fol- 
  

   lowed 
  but 
  little, 
  if 
  any, 
  damage 
  will 
  result; 
  and, 
  as 
  an 
  illustration, 
  it 
  

   may 
  be 
  mentioned 
  that 
  fish 
  have 
  been 
  kept 
  for 
  14 
  years 
  and 
  their 
  full 
  

   quota 
  of 
  eg.us 
  extracted 
  each 
  season 
  during 
  the 
  egg-producing 
  term, 
  

   which 
  is 
  normally 
  from 
  10 
  to 
  12 
  years. 
  The 
  male 
  fish 
  is 
  to 
  be 
  treated 
  

   very 
  much 
  in 
  the 
  same 
  manner 
  as 
  the 
  female, 
  except 
  the 
  milt 
  must 
  not 
  

   be 
  forced 
  out, 
  only 
  that 
  which 
  comes 
  freely 
  being 
  taken. 
  

  

  After 
  stripping, 
  the 
  fish 
  are 
  not 
  returned 
  to 
  the 
  spawning-pond, 
  but 
  

   spent 
  females 
  are 
  placed 
  in 
  one 
  pond 
  and 
  the 
  males 
  in 
  another. 
  The 
  

  

  