﻿106 
  

  

  increased 
  four 
  or 
  five 
  degrees^ 
  or 
  to 
  about 
  eighty 
  degrees, 
  the 
  

   young 
  fish 
  will 
  hatch 
  out 
  in 
  about 
  forty-eight 
  hours. 
  Thi« 
  

   hohls 
  good 
  for 
  spawn 
  taken 
  wiicn 
  the 
  water 
  is 
  about 
  seventy- 
  

   four 
  or 
  seventy-five 
  degrees 
  in 
  temperature 
  But 
  when 
  the 
  

   water 
  gets 
  so 
  warm 
  that 
  its 
  mean 
  temperature 
  is 
  eighty 
  

   degrees 
  or 
  over, 
  we 
  begin 
  to 
  find 
  the 
  female 
  Shad 
  full 
  of 
  

   what 
  is 
  called 
  '' 
  rotten 
  spawn," 
  with 
  which 
  nothing 
  can 
  be 
  

   done. 
  The 
  warm 
  water 
  seems 
  to 
  have 
  the 
  effect 
  of 
  killing 
  

   the 
  8i)awn 
  in 
  the 
  ovaries 
  of 
  the 
  female, 
  before 
  she 
  has 
  reached 
  

   her 
  spawning 
  ground 
  on 
  her 
  journey 
  from 
  the 
  sea. 
  Conse- 
  

   quently, 
  in 
  Shad 
  working, 
  the 
  run 
  of 
  fish 
  during 
  such 
  warm 
  

   spells 
  are 
  worthless, 
  so 
  far 
  as 
  propagation 
  is 
  concerned^ 
  and 
  

   the 
  Shad-hatcher 
  has 
  to 
  wait 
  until 
  the 
  water 
  moderates 
  in 
  

   temperature, 
  and 
  anew 
  immigration 
  of 
  Shad, 
  fresh 
  run 
  from 
  

   the 
  colder 
  water 
  of 
  the 
  ocean_, 
  takes 
  place. 
  The 
  only 
  alter- 
  

   native, 
  to 
  waiting 
  for 
  these 
  spells 
  of 
  warm 
  water 
  temper- 
  

   ature 
  to 
  pass, 
  and 
  for 
  the 
  influx 
  of 
  new 
  schools 
  of 
  Shad, 
  is 
  to 
  

   begin 
  operations 
  earlier 
  in 
  the 
  season 
  ; 
  take 
  such 
  females 
  as 
  

   have 
  matured 
  early 
  ; 
  be 
  a 
  little 
  longer 
  in 
  hatching 
  out 
  the 
  

   young 
  fry, 
  getting 
  by 
  this 
  means 
  a 
  hardier 
  lot, 
  of 
  course 
  ; 
  

   and 
  extending 
  operations 
  until 
  the 
  increase 
  in 
  temperature 
  

   of 
  the 
  water 
  brings 
  the 
  females 
  which 
  have 
  bad 
  spawn. 
  

  

  Very 
  respectfully, 
  

  

  H. 
  J. 
  RICE. 
  

  

  