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  REPORT 
  OF 
  THE 
  COMMISSIONER 
  OF 
  FISHERIES. 
  

  

  whether 
  it 
  be 
  possible 
  to 
  establish 
  and 
  maintain 
  a 
  commercial 
  fishery 
  

   for 
  whitefish 
  without 
  jeopardizing 
  fishiag 
  for 
  pleasure 
  and 
  sport, 
  

   which 
  now 
  yields 
  remunerative 
  business 
  to 
  guides, 
  boatmen, 
  and 
  the 
  

   keepers 
  of 
  pleasure 
  resorts. 
  

  

  OTHER 
  INVESTIGATIONS 
  AND 
  EXPERIMENTS. 
  

  

  The 
  field 
  work 
  of 
  the 
  biological 
  survey 
  of 
  San 
  Francisco 
  Bay 
  was 
  

   concluded 
  during 
  the 
  year 
  and 
  considerable 
  progress 
  was 
  made 
  in 
  

   the 
  study 
  of 
  the 
  collections 
  which 
  have 
  been 
  assigned 
  to 
  various 
  

   specialists. 
  The 
  general 
  report 
  deahng 
  largely 
  with 
  the 
  economic 
  

   results 
  of 
  the 
  survey 
  is 
  in 
  an 
  advanced 
  stage 
  of 
  preparation. 
  This 
  

   investigation 
  was 
  made 
  by 
  the 
  steamer 
  Albatross 
  pending 
  the 
  pas- 
  

   sage 
  of 
  an 
  appropriation 
  for 
  repahs, 
  without 
  which 
  she 
  was 
  unsea- 
  

   worthy 
  and 
  unfit 
  to 
  leave 
  sheltered 
  waters. 
  

  

  Dm'ing 
  July 
  and 
  August, 
  1912, 
  the 
  schooner 
  Grampus 
  was 
  em- 
  

   ployed 
  in 
  an 
  investigation 
  of 
  the 
  oceanography 
  of 
  the 
  Gulf 
  of 
  Maine, 
  

   with 
  the 
  purpose 
  of 
  determining 
  the 
  physical 
  and 
  biological 
  condi- 
  

   tions 
  governmg 
  the 
  distribution 
  of 
  fish 
  food 
  and 
  young 
  fishes. 
  The 
  

   work 
  was 
  supplemented 
  during 
  the 
  winter 
  and 
  sprhig 
  by 
  observations 
  

   off 
  the 
  coast 
  In 
  the 
  vicinity 
  of 
  Gloucester 
  and 
  on 
  Georges 
  Banks 
  in 
  

   connection 
  with 
  the 
  otter-trawl 
  mvestigations. 
  

  

  A 
  related 
  inquiry 
  respectmg 
  the 
  spawnmg 
  of 
  haddock 
  was 
  con- 
  

   ducted 
  oil 
  the 
  coast 
  of 
  Massachusetts 
  and 
  New 
  Hampshire 
  during 
  

   the 
  spring, 
  use 
  being 
  made 
  of 
  the 
  facilities 
  afforded 
  by 
  the 
  recently 
  

   established 
  gill-net 
  fishery 
  for 
  haddock. 
  The 
  spawnmg 
  grounds 
  of 
  

   this 
  species, 
  which 
  is 
  extensively 
  propagated 
  by 
  the 
  Bureau, 
  appear 
  

   to 
  be 
  less 
  restricted 
  than 
  has 
  been 
  generally 
  supposed. 
  The 
  inquiry 
  

   is 
  to 
  be 
  continued 
  as 
  opportunity 
  is 
  afforded. 
  

  

  Terrapin 
  culture 
  at 
  Beaufort 
  reached 
  a 
  stage 
  which 
  justified 
  the 
  

   Bureau 
  in 
  issuing 
  a 
  circular 
  descriptive 
  of 
  its 
  methods 
  and 
  com- 
  

   mending 
  it 
  as 
  promising 
  commercial 
  returns 
  to 
  persons 
  undertaking 
  it 
  

   on 
  a 
  practical 
  scale. 
  Considerable 
  interest 
  has 
  been 
  manifested 
  in 
  

   the 
  project, 
  and 
  experiments 
  are 
  being 
  conducted 
  under 
  private 
  

   auspices 
  m 
  North 
  Carolma 
  and 
  Florida. 
  

  

  During 
  the 
  spring, 
  experiments 
  m 
  frog 
  culture 
  and 
  in 
  artificial 
  pro- 
  

   duction 
  of 
  the 
  natural 
  food 
  of 
  fishes 
  were 
  begun 
  at 
  the 
  Edenton, 
  N. 
  C, 
  

   station. 
  

  

  Considerable 
  progress 
  has 
  been 
  made 
  during 
  the 
  year 
  in 
  the 
  accumu- 
  

   lation 
  of 
  material 
  toward 
  a 
  series 
  of 
  publications 
  on 
  the 
  life 
  histories 
  

   of 
  important 
  food 
  fishes 
  and 
  other 
  valuable 
  aquatic 
  animals. 
  This 
  

   necessarily 
  is 
  slow 
  work 
  and 
  to 
  a 
  very 
  large 
  extent 
  the 
  data 
  are 
  collected 
  

   as 
  opportunity 
  offers 
  in 
  connection 
  with 
  other 
  investigations. 
  The 
  

   early 
  larval 
  stages 
  of 
  many 
  American 
  food 
  fiehes 
  are 
  unknown, 
  and 
  in 
  

   order 
  that 
  the 
  breeding 
  grounds 
  and 
  the 
  habitats 
  of 
  the 
  young 
  may 
  be 
  

   determined 
  it 
  is 
  necessary 
  to 
  collect 
  specimens 
  and 
  make 
  drawings 
  

  

  