﻿64 
  REPORT 
  OF 
  THE 
  COMMISSIONER 
  OF 
  FISHERIES. 
  

  

  INVESTIGATIONS 
  OF 
  LAKES 
  AND 
  STREAMS. 
  

  

  The 
  investigations 
  of 
  lakes 
  in 
  Washington 
  and 
  Idaho, 
  begun 
  during 
  

   the 
  fiscal 
  year 
  1912, 
  were 
  brought 
  to 
  a 
  close 
  p)ending 
  the 
  submittal 
  

   of 
  the 
  report 
  of 
  the 
  investigators 
  and 
  an 
  analysis 
  of 
  the 
  scientific 
  and 
  

   practical 
  results. 
  The 
  report 
  has 
  not 
  yet 
  been 
  completed, 
  but 
  pre- 
  

   liminary 
  memoranda 
  indicate 
  that 
  it 
  will 
  contain 
  matter 
  and 
  recom- 
  

   mendations 
  of 
  value 
  to 
  fish 
  culture, 
  particularly 
  as 
  a 
  guide 
  to 
  the 
  

   species 
  of 
  fishes 
  which 
  it 
  will 
  be 
  profitable 
  to 
  plant 
  in 
  those 
  waters. 
  

  

  In 
  Wisconsui, 
  where 
  the 
  Bureau 
  is 
  cooperating 
  with 
  the 
  State 
  Geo- 
  

   logical 
  and 
  Natural 
  History 
  Survey 
  in 
  an 
  investigation 
  of 
  the 
  lakes, 
  

   the 
  work, 
  is 
  being 
  conducted 
  in 
  great 
  detail, 
  and 
  with 
  strict 
  attention 
  

   to 
  scientific 
  accuracy 
  m 
  an 
  attempt 
  to 
  discover 
  the 
  fundamental, 
  

   physical, 
  and 
  biological 
  conditions 
  of 
  lacustrme 
  life. 
  This 
  research, 
  

   which 
  requires 
  but 
  a 
  small 
  expenditure, 
  under 
  the 
  cooperative 
  arrange- 
  

   ment, 
  will 
  eventually 
  establish 
  a 
  foundation 
  for 
  the 
  better 
  understand- 
  

   mg 
  of 
  lake 
  phenomena 
  in 
  other 
  regions. 
  

  

  A 
  biological 
  and 
  fishery 
  examination 
  of 
  Lake 
  Champlain, 
  com- 
  

   menced 
  during 
  the 
  year 
  m 
  cooperation 
  with 
  the 
  Vermont 
  State 
  Fish 
  

   Commission, 
  was 
  suspended 
  at 
  the 
  close 
  of 
  the 
  summer, 
  but 
  will 
  be 
  

   concluded 
  during 
  the 
  next 
  fiscal 
  year. 
  It 
  has 
  as 
  its 
  primary 
  purpose 
  

   the 
  determmation 
  of 
  the 
  feasibility 
  of 
  establishmg 
  a 
  commercial 
  

   fishery 
  for 
  certain 
  species 
  of 
  fishes 
  without 
  detriment 
  to 
  the 
  sporting 
  

   mterests 
  on 
  the 
  lake 
  which 
  are 
  a 
  valuable 
  asset 
  to 
  the 
  people 
  of 
  Ver- 
  

   mont 
  and 
  New 
  York. 
  

  

  Mnor 
  inquiries 
  were 
  conducted 
  in 
  Tuxedo 
  Lake, 
  N. 
  Y., 
  m 
  respect 
  

   to 
  the 
  matiu-ation 
  and 
  spawnmg 
  of 
  chinook 
  salmon, 
  and 
  in 
  the 
  small 
  

   lakes 
  and 
  artesian-woll 
  ponds 
  of 
  North 
  and 
  South 
  Dalvota 
  to 
  deter- 
  

   mine 
  their 
  suitability 
  for 
  the 
  planting 
  of 
  fishes. 
  The 
  latter 
  work 
  was 
  

   not 
  completed, 
  owing 
  to 
  the 
  resignation 
  of 
  the 
  assistant 
  assigned 
  to 
  it. 
  

  

  The 
  construction 
  of 
  the 
  great 
  dam 
  in 
  the 
  Mississippi 
  River 
  at 
  

   Keokuk, 
  Iowa, 
  has 
  resulted 
  m 
  the 
  production 
  of 
  a 
  long 
  narrow 
  body 
  

   of 
  water 
  Imowii 
  as 
  Lake 
  Cooper, 
  which 
  m 
  its 
  general 
  physical 
  charac- 
  

   teristics 
  resembles 
  Lake 
  Pepin, 
  a 
  natural 
  expansion 
  m 
  the 
  course 
  

   of 
  the 
  same 
  stream 
  in 
  Wisconsin 
  and 
  Minnesota. 
  In 
  its 
  fisheries 
  

   Lake 
  Pepin 
  is 
  the 
  most 
  productive 
  part 
  of 
  the 
  Mississippi 
  River, 
  and 
  

   it 
  appears 
  probable 
  that 
  with 
  proper 
  treatment 
  the 
  new 
  artificial 
  lake 
  

   may 
  be 
  equally 
  valuable 
  and 
  serve 
  a 
  useful 
  purpose 
  supplemental 
  

   to 
  its 
  primary 
  use 
  for 
  hydroelectric 
  power 
  generation. 
  To 
  supply 
  the 
  

   information 
  necessary 
  to 
  aid 
  steps 
  to 
  this 
  end, 
  the 
  lake 
  has 
  been 
  placed 
  

   under 
  observation, 
  and 
  at 
  the 
  end 
  of 
  the 
  fiscal 
  year 
  arrangements 
  

   had 
  been 
  made 
  for 
  the 
  investigation 
  of 
  the 
  plants 
  and 
  microscopic 
  

   animal 
  food. 
  It 
  is 
  hoped 
  that 
  the 
  results 
  will 
  be 
  syfiiciently 
  favorable 
  

   to 
  warrant 
  the 
  plantuig 
  of 
  fishes 
  and 
  larval 
  mussels 
  therein 
  during 
  

   the 
  current 
  year. 
  Coincident 
  with 
  this 
  work 
  a 
  study 
  was 
  made 
  of 
  

   the 
  effects 
  of 
  the 
  dam 
  and 
  locks 
  on 
  the 
  movements 
  of 
  migratory 
  

   fishes, 
  m 
  the 
  expectation, 
  already 
  partly 
  realized, 
  of 
  adding 
  to 
  know- 
  

   ledge 
  respecting 
  the 
  general 
  principles 
  of 
  a 
  successful 
  and 
  efficient 
  

   fish 
  way. 
  

  

  Contmuing 
  the 
  survey 
  of 
  the 
  fresh-water 
  mussel 
  resources 
  of 
  the 
  

   Mississippi 
  Valley, 
  mvestigations 
  were 
  conducted 
  in 
  the 
  upper 
  Mis- 
  

   souri 
  River 
  drainage 
  system 
  and 
  in 
  the 
  Ohio 
  River 
  valley. 
  The 
  

   latter 
  inquhy 
  is 
  m 
  progress 
  at 
  the 
  close 
  of 
  the 
  fiscal 
  year. 
  The 
  publi- 
  

  

  