﻿EEPOET 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHEEIES. 
  81 
  

  

  Mr. 
  F. 
  M. 
  Chamberlain. 
  One 
  of 
  the 
  topics 
  considered 
  was 
  the 
  move- 
  

   ments 
  of 
  spent 
  sahnou, 
  more 
  especially 
  the 
  tendency 
  of 
  spent 
  fish 
  to 
  

   move 
  downstream. 
  The 
  season 
  was 
  unfavorable 
  for 
  observations 
  in 
  

   Battle 
  Creek, 
  the 
  point 
  selected 
  for 
  this 
  purpose, 
  and 
  the 
  data 
  obtained 
  

   were 
  meager; 
  a 
  few 
  spent 
  fish 
  were 
  caught 
  and 
  tagged, 
  and 
  some 
  of 
  

   these 
  were 
  subsequently 
  taken 
  in 
  a 
  trap 
  above 
  the 
  place 
  of 
  release, 
  but 
  

   none 
  was 
  caught 
  below. 
  A 
  site 
  suitable 
  for 
  a 
  branch 
  hatchery 
  for 
  

   the 
  summer 
  run 
  of 
  salmon 
  was 
  found 
  on 
  Battle 
  Creek, 
  opposite 
  the 
  

   mouth 
  of 
  Baldwin 
  Creek; 
  the 
  advantages 
  of 
  the 
  place 
  are 
  a 
  gravity 
  

   suppl}^ 
  of 
  water, 
  facilities 
  for 
  placing 
  a 
  rack, 
  seining 
  grounds, 
  and 
  

   spawning 
  beds. 
  

  

  The 
  effects 
  of 
  light 
  on 
  developing 
  salmon 
  eggs 
  were 
  determined 
  by 
  

   experimental 
  tests 
  at 
  Battle 
  Creek 
  hatcheiy 
  in 
  November. 
  These 
  

   proved 
  that 
  eggs 
  are 
  injured 
  by 
  sunlight 
  and 
  light 
  on 
  a 
  cloudy 
  day 
  up 
  

   to 
  the 
  age 
  of 
  3 
  weeks; 
  before 
  the 
  age 
  of 
  2 
  weeks 
  the 
  eggs 
  thus 
  exposed 
  

   will 
  die 
  in 
  twenty-four 
  hours; 
  after 
  that 
  age 
  there 
  is 
  greater 
  resist- 
  

   ance 
  but 
  still 
  considerable 
  loss. 
  When 
  a 
  basket 
  of 
  young 
  salmon 
  eggs 
  

   is 
  placed 
  in 
  the 
  light, 
  the 
  eggs 
  in 
  the 
  top 
  layer 
  will 
  die, 
  while 
  the 
  

   deeper 
  eggs 
  are 
  uninjured; 
  and 
  if 
  one 
  end 
  of 
  a 
  basket 
  is 
  sheltered 
  the 
  

   line 
  of 
  demarcation 
  is 
  sharply 
  defined 
  by 
  the 
  number 
  of 
  dead 
  eggs 
  on 
  

   the 
  two 
  sides. 
  Inside 
  the 
  hatchery, 
  eggs 
  in 
  an 
  open 
  basket, 
  in 
  a 
  basket 
  

   covered 
  with 
  the 
  ordinary 
  trough 
  screen, 
  and 
  in 
  a 
  basket 
  inclosed 
  in 
  a 
  

   light-proof 
  box 
  opened 
  only 
  by 
  candlelight 
  exhibited 
  no 
  appreciable 
  

   difierences 
  in 
  percentage 
  hatched 
  or 
  in 
  health 
  of 
  fry. 
  Prof. 
  C. 
  W. 
  

   Greene 
  continued 
  his 
  studies 
  of 
  the 
  physiology 
  of 
  the 
  Sacramento 
  

   quinnat 
  salmon, 
  making 
  observations 
  and 
  experiments 
  on 
  salmon 
  at 
  

   sea, 
  in 
  the 
  lower 
  course 
  of 
  the 
  river, 
  and 
  at 
  the 
  spawning 
  grounds 
  in 
  

   the 
  headwaters 
  at 
  Monterey, 
  Black 
  Diamond, 
  and 
  Baird, 
  respectively. 
  

   Mr. 
  Rutter 
  assisted 
  in 
  this 
  work. 
  

  

  ATLANTIC 
  SALMON, 
  

  

  Salmon 
  of 
  Penobscot 
  jBasi?i.— 
  The 
  investigation 
  of 
  the 
  inland 
  waters 
  

   of 
  Maine, 
  on 
  which 
  Dr. 
  W. 
  C. 
  Kendall 
  has 
  been 
  engaged 
  for 
  several- 
  

   seasons, 
  was 
  continued 
  during 
  the 
  first 
  four 
  months 
  of 
  the 
  fiscal 
  year, 
  

   most 
  attention 
  being 
  devoted 
  to 
  the 
  salmon 
  of 
  Penobscot 
  River, 
  

   especially 
  the 
  young 
  salmon 
  of 
  the 
  East 
  Branch. 
  The 
  basin 
  of 
  this 
  

   stream 
  was 
  thoroughly 
  explored, 
  including 
  its 
  two 
  principal 
  tributaries, 
  

   Wissataquoik 
  River 
  and 
  Sebois 
  Stream, 
  together 
  with 
  numerous 
  brooks 
  

   and 
  lakes. 
  It 
  is 
  alleged 
  that 
  owing 
  to 
  artificial 
  obstructions 
  but 
  few 
  

   salmon 
  are 
  able 
  to 
  ascend 
  the 
  East 
  Branch, 
  and 
  only 
  a 
  few 
  adult 
  fish 
  

   were 
  observed 
  above 
  Grindstone, 
  at 
  the 
  mouth 
  of 
  Wissataquoik 
  River; 
  

   it 
  is 
  possible, 
  however, 
  that 
  there 
  were 
  other 
  fish 
  lying 
  concealed 
  in 
  

   the 
  deep 
  pools. 
  Although 
  salmon 
  are 
  said 
  to 
  have 
  been 
  very 
  scarce 
  

   for 
  the 
  past 
  few 
  years 
  on 
  their 
  spawning 
  beds, 
  young 
  salmon 
  evidently 
  

   of 
  this 
  year's 
  hatching 
  were 
  fairly 
  numerous 
  in 
  all 
  suitable 
  places 
  in 
  

  

  F. 
  C. 
  1903 
  6 
  

  

  