﻿EEPOET 
  OF 
  THE 
  COMMISSIONER 
  OF 
  FISHERIES. 
  25 
  

  

  In 
  the 
  spring 
  of 
  1913 
  a 
  very 
  promising 
  field 
  for 
  the 
  collection 
  of 
  

   grayling 
  and 
  rainbow 
  trout 
  eggs 
  was 
  opened 
  in 
  Madison 
  VaUey, 
  Mont., 
  

   and 
  operated 
  as 
  an 
  auxiliary 
  of 
  the 
  Bozeman 
  station. 
  During 
  the 
  

   spawning 
  season, 
  extending 
  through 
  the 
  month 
  of 
  April 
  and 
  the 
  first 
  

   half 
  of 
  May, 
  2,445,800 
  grayling 
  eggs 
  and 
  about 
  200,000 
  rainbow-trout 
  

   eggs 
  were 
  secured 
  near 
  the 
  towns 
  of 
  Ennis 
  and 
  McAllister, 
  Mont. 
  If 
  

   the 
  conditions 
  for 
  the 
  propagation 
  of 
  grayling 
  in 
  this 
  field 
  prove 
  as 
  

   favorable 
  as 
  the 
  prospects 
  now 
  indicate, 
  it 
  is 
  the 
  mtention 
  to 
  abandon 
  

   the 
  old 
  grayling 
  station 
  at 
  Red 
  Rock, 
  Mont., 
  which, 
  owing 
  to 
  its 
  almost 
  

   inaccessible 
  location, 
  is 
  very 
  expensive 
  to 
  operate. 
  

  

  The 
  propagation 
  of 
  the 
  blackspotted 
  trout 
  at 
  Derby 
  Dam, 
  on 
  the 
  

   Truckee 
  River, 
  was 
  not 
  undertaken 
  the 
  past 
  season, 
  in 
  view 
  of 
  the 
  

   small 
  numbers 
  of 
  trout 
  ascending 
  to 
  the 
  dam 
  as 
  a 
  consequence 
  of 
  the 
  

   great 
  diversion 
  of 
  water 
  from 
  the 
  river 
  for 
  agricultural 
  purposes. 
  The 
  

   work 
  on 
  this 
  river 
  will 
  not 
  be 
  resumed 
  until 
  a 
  more 
  favorable 
  location 
  

   for 
  a 
  field 
  station 
  can 
  be 
  found. 
  

  

  Taken 
  as 
  a 
  whole 
  the 
  work 
  at 
  the 
  pond 
  stations 
  during 
  the 
  year 
  was 
  

   satisfactory, 
  the 
  increase 
  in 
  the 
  output 
  of 
  the 
  black 
  basses, 
  sunfishes, 
  

   and 
  catfishes 
  being 
  due 
  to 
  the 
  adoption 
  of 
  improved 
  methods, 
  and 
  a 
  

   more 
  comprehensive 
  knowledge 
  of 
  the 
  factors 
  governing 
  the 
  success- 
  

   ful 
  propagation 
  of 
  these 
  fishes. 
  While 
  sudden 
  changes 
  in 
  water 
  

   temperature 
  during 
  the 
  spawning 
  season 
  at 
  some 
  of 
  the 
  northern 
  and 
  

   western 
  stations 
  curtailed 
  the 
  work 
  somewhat, 
  the 
  output 
  of 
  the 
  

   southern 
  stations 
  was 
  materially 
  increased 
  over 
  that 
  of 
  last 
  year. 
  

  

  Rescue 
  of 
  food 
  fishes 
  from 
  overflowed 
  waters. 
  — 
  This 
  is 
  regarded 
  as 
  one 
  

   of 
  the 
  most 
  hnportant 
  and 
  immediately 
  eft'ective 
  branches 
  of 
  the 
  

   Bureau's 
  work 
  in 
  the 
  conservation 
  of 
  fishery 
  resources, 
  as 
  it 
  means 
  the 
  

   saving 
  of 
  hundreds 
  of 
  thousands 
  of 
  valuable 
  food 
  fishes 
  which 
  would 
  

   otherwise 
  be 
  lost. 
  

  

  On 
  the 
  Mississippi 
  and 
  Ilhnois 
  Rivers 
  there 
  was 
  varying 
  success 
  

   in 
  the 
  different 
  fields. 
  Protracted 
  drought 
  and 
  consequent 
  low-water 
  

   stages 
  interfered 
  with 
  the 
  work 
  on 
  the 
  upper 
  and 
  lower 
  Mississippi 
  

   River, 
  but 
  operations 
  were 
  conducted 
  under 
  more 
  favorable 
  auspices 
  

   on 
  the 
  Illinois 
  River, 
  and 
  nearly 
  half 
  a 
  million 
  black 
  bass, 
  crappie, 
  

   sunfish, 
  catfish, 
  and 
  other 
  river 
  species 
  were 
  rescued 
  from 
  the 
  sloughs 
  

   and 
  bayous 
  which 
  had 
  been 
  cut 
  off 
  from 
  the 
  main 
  river, 
  and 
  utilized 
  

   for 
  stocking 
  inland 
  lakes 
  and 
  streams. 
  In 
  addition 
  to 
  this 
  output 
  

   many 
  thousands 
  of 
  fish 
  taken 
  from 
  waters 
  where 
  they 
  would 
  ulti- 
  

   mately 
  have 
  perished 
  from 
  drought 
  or 
  cold 
  were 
  liberated 
  in 
  the 
  

   main 
  river. 
  

  

  Miscellaneous 
  fisTi-culturdl 
  notes. 
  — 
  The 
  season's 
  operations 
  with 
  the 
  

   buffalo-fish 
  at 
  Manchester 
  and 
  auxiliary 
  stations 
  were 
  somewhat 
  

   disappointing, 
  owing 
  to 
  the 
  great 
  difficulty 
  in 
  obtaining 
  ripe 
  fish, 
  

   and 
  the 
  heavy 
  mortality 
  of 
  the 
  eggs 
  secured, 
  as 
  a 
  result 
  of 
  the 
  low- 
  

   water 
  temperatures 
  prevailing 
  during 
  most 
  of 
  the 
  spawning 
  season. 
  

  

  