﻿6G 
  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  

  

  The 
  best 
  precaution 
  against 
  this 
  growth 
  is 
  the 
  careful 
  picking 
  out 
  of 
  

   dead 
  eggs 
  before 
  there 
  is 
  time 
  for 
  the 
  fungus 
  to 
  grow 
  on 
  them, 
  and 
  in 
  

   case 
  of 
  a 
  serious 
  attack 
  on 
  fry 
  or 
  older 
  fish 
  to 
  treat 
  them 
  with 
  an 
  exterior 
  

   application 
  of 
  salt, 
  which, 
  while 
  not 
  a 
  cure-all, 
  is 
  very 
  efficacious 
  in 
  

   cases 
  of 
  fungous 
  diseases, 
  and, 
  if 
  prudently 
  used, 
  a 
  safe 
  remedy 
  for 
  fish 
  

   that 
  have 
  reached 
  the 
  feeding 
  stage. 
  

  

  To 
  apply 
  this 
  remedy 
  to 
  fry 
  in 
  the 
  troughs 
  a 
  saturated 
  solution 
  of 
  

   salt 
  in 
  water 
  is 
  made 
  — 
  that 
  is, 
  the 
  strongest 
  brine 
  that 
  can 
  be 
  made 
  with- 
  

   out 
  heating 
  the 
  water. 
  The 
  flow 
  of 
  water 
  in 
  the 
  trough 
  to 
  be 
  treated 
  

   is 
  then 
  stopped, 
  which 
  leaves 
  it 
  from 
  3 
  to 
  4 
  inches 
  deep, 
  when 
  enough 
  

   brine 
  is 
  poured 
  in 
  to 
  make 
  the 
  water 
  in 
  the 
  trough 
  about 
  as 
  salt 
  as 
  com- 
  

   mon 
  sea-water, 
  about 
  1.028 
  specific 
  gravity. 
  The 
  fish 
  are 
  left 
  in 
  this 
  20 
  

   or 
  30 
  minutes, 
  unless 
  they 
  exhibit 
  uneasiness, 
  and 
  then 
  fresh 
  water 
  is 
  

   turned 
  on. 
  Precaution 
  is 
  taken 
  to 
  dilute 
  the 
  brine 
  with 
  an 
  equal 
  quan- 
  

   tity 
  of 
  water, 
  to 
  distribute 
  it 
  the 
  whole 
  length 
  of 
  the 
  trough, 
  actively 
  

   stirring 
  the 
  water 
  to 
  secure 
  an 
  even 
  mixture 
  ; 
  and 
  before 
  turning 
  on 
  the 
  

   usual 
  water 
  supply, 
  a 
  large 
  quantity 
  of 
  fresh 
  water 
  is 
  likewise 
  poured 
  

   in, 
  distributing 
  it 
  the 
  whole 
  length 
  of 
  the 
  trough 
  and 
  stirring 
  as 
  before, 
  

   to 
  guard 
  against 
  a 
  too 
  sudden 
  change. 
  

  

  Such 
  precautions 
  are 
  especially 
  necessary 
  in 
  the 
  application 
  of 
  salt 
  

   to 
  very 
  young 
  fish. 
  A 
  large 
  number 
  of 
  salmon 
  in 
  the 
  sac 
  stage 
  was 
  

   once 
  destroyed 
  by 
  pouring 
  in 
  a 
  little 
  brine 
  without 
  stirring 
  it: 
  it 
  ap- 
  

   peared 
  to 
  sink 
  to 
  the 
  bottom 
  and 
  spread 
  out 
  in 
  a 
  layer 
  by 
  itself 
  among 
  

   the 
  fry, 
  and 
  all 
  exposed 
  to 
  it 
  died. 
  

  

  ENEMIES 
  OF 
  YOUNG 
  SALMON. 
  

  

  The 
  young 
  salmon 
  are 
  subject 
  to 
  the 
  attacks 
  of 
  many 
  animals 
  and 
  

   birds, 
  such 
  as 
  the 
  mink, 
  mole, 
  star-nosed 
  mole, 
  common 
  rat, 
  muskrat, 
  

   kingfisher, 
  great 
  horned 
  owl, 
  great 
  blue 
  heron, 
  sandpiper, 
  and 
  fish- 
  

   hawk, 
  besides 
  frogs 
  and 
  all 
  large 
  fishes. 
  

  

  At 
  Craig 
  Brook 
  the 
  mink 
  has 
  caused 
  serious 
  loss 
  in 
  the 
  ponds. 
  As 
  

   a 
  protection 
  some 
  of 
  the 
  ponds 
  are 
  covered 
  with 
  galvanized 
  poultry 
  

   netting, 
  and 
  traps 
  are 
  kept 
  constantly 
  set 
  in 
  the 
  avenues 
  by 
  which 
  it 
  

   is 
  apt 
  to 
  apj)roach. 
  The 
  mole 
  burrows 
  through 
  embankments 
  and 
  thus 
  

   sometimes 
  causes 
  trouble. 
  The 
  star-nosed 
  mole 
  is 
  known 
  to 
  steal 
  dead 
  

   eggs, 
  and 
  is 
  suspected 
  of 
  taking 
  live 
  ones. 
  The 
  rat 
  sometimes 
  takes 
  

   young 
  fish 
  from 
  the 
  troughs. 
  The 
  muskrat 
  burrows 
  in 
  embankments 
  

   and 
  sometimes 
  eats 
  fish. 
  

  

  The 
  different 
  fish-eating 
  birds 
  occasionally 
  steal 
  fish 
  from 
  the 
  ponds 
  

   or 
  troughs, 
  but 
  if 
  a 
  careful 
  watch 
  is' 
  kept 
  the 
  danger 
  is 
  not 
  great. 
  

   Frogs 
  may 
  be 
  exceedingly 
  destructive 
  to 
  young 
  salmon, 
  and 
  must 
  be 
  

   caught 
  out 
  of 
  the 
  fish-ponds. 
  

  

  To 
  avoid 
  loss 
  from 
  cannibalism 
  among 
  the 
  fishes 
  it 
  is 
  necessary 
  to 
  

   feed 
  them 
  well 
  and 
  to 
  take 
  great 
  care 
  that 
  no 
  large 
  fish 
  get 
  in 
  among 
  

   the 
  small 
  ones. 
  

  

  