﻿8 
  GROWTH 
  AND 
  MIGRATION 
  OF 
  FRESH-WATER 
  MUSSELS. 
  

  

  Shoojly, 
  lot 
  C. 
  — 
  Twenty-two 
  specimens 
  of 
  Anodonta 
  grandis 
  (floater) 
  

   were 
  planted 
  in 
  a 
  mud 
  bank 
  similar 
  to 
  the 
  environment 
  selected 
  

   by 
  this 
  species 
  in 
  this 
  creek. 
  

  

  Shoojly, 
  lot 
  D. 
  — 
  As 
  already 
  indicated, 
  the 
  Shoofly 
  species 
  were 
  

   mostly 
  undulata, 
  with 
  a 
  few 
  grandis, 
  and 
  all 
  were 
  large. 
  In 
  order 
  

   to 
  get 
  a 
  larger 
  number 
  of 
  species 
  and 
  smaller 
  specimens, 
  I 
  collected 
  

   168 
  mussels 
  in 
  the 
  Chikaskia 
  and 
  planted 
  them 
  in 
  the 
  Shoofly. 
  In 
  

   this 
  lot, 
  Q. 
  undulata 
  (three-ridge), 
  Q. 
  lachrymosa 
  (maple-leaf), 
  

   Q. 
  pustulosa 
  (warty-back, 
  pimple-back), 
  and 
  Q. 
  ruhiginosa 
  were 
  

   represented 
  by 
  fairly 
  good 
  numbers, 
  and 
  nearly 
  all 
  of 
  the 
  specimens 
  

   were 
  under 
  200 
  grams 
  in 
  weight. 
  It 
  should 
  be 
  stated 
  here 
  that 
  a 
  

   few 
  specimens 
  of 
  all 
  of 
  the 
  Quadrulae 
  were 
  found 
  native 
  of 
  the 
  Shoofly, 
  

   and 
  in 
  addition 
  to 
  these, 
  Lampsilis 
  gracilis 
  (paper-shell), 
  Lampsilis 
  

   anodontoides 
  (yellow 
  sand-shell), 
  Symphynota 
  complanata 
  (heel- 
  

   splitter), 
  and 
  Anodonta 
  imhecilis 
  were 
  found. 
  Not 
  counting 
  grandis 
  

   (floater), 
  the 
  ratio 
  would 
  be 
  25 
  undulata 
  (three-ridge) 
  to 
  one 
  of 
  

   another 
  species. 
  This, 
  however, 
  is 
  not 
  unusual 
  in 
  dominance 
  of 
  

   species 
  in 
  certain 
  streams. 
  

  

  In 
  planting 
  specimens, 
  the 
  bottom 
  was 
  cleared 
  of 
  the 
  original 
  

   occupants 
  and 
  the 
  tagged 
  specimens 
  were 
  put 
  in 
  their 
  places. 
  For 
  

   example, 
  for 
  lot 
  D, 
  an 
  area 
  of 
  bottom 
  about 
  12 
  feet 
  in 
  diameter 
  

   was 
  cleared 
  and 
  the 
  Chikaskia 
  specimens 
  spread 
  out 
  on 
  the 
  cleared 
  

   bottom. 
  The 
  Shoofly 
  bottom, 
  where 
  the 
  sites 
  were 
  located, 
  is 
  made 
  

   up 
  of 
  a 
  mixture 
  of 
  broken 
  blue 
  shale, 
  coarse 
  sand, 
  and 
  mud. 
  The 
  

   water 
  is 
  still 
  and 
  cloudy 
  and 
  from 
  2 
  to 
  5 
  feet 
  deep. 
  The 
  specimens 
  

   were 
  planted 
  in 
  water 
  about 
  3^ 
  feet 
  deep. 
  Results 
  that 
  follow 
  

   indicate 
  that 
  the 
  above 
  is 
  a 
  favorable 
  type 
  of 
  habitat 
  for 
  the 
  species 
  

   used. 
  

  

  As 
  already 
  indicated, 
  the 
  specimens 
  were 
  free 
  in 
  the 
  stream; 
  no 
  

   obstruction 
  of 
  any 
  kind 
  was 
  placed 
  in 
  their 
  way, 
  nor 
  any 
  effort 
  made 
  

   to 
  confine 
  them. 
  The 
  planting 
  operation 
  consisted 
  in 
  turning 
  them 
  

   out 
  of 
  a 
  sack 
  and 
  spreading 
  them 
  around 
  on 
  the 
  stream 
  floor. 
  In 
  24 
  

   hours 
  after 
  planting 
  it 
  was 
  noticed 
  that 
  most 
  of 
  the 
  specimens 
  had 
  

   righted 
  themselves 
  and 
  were 
  stuck 
  in 
  the 
  bottom, 
  foot 
  end 
  down, 
  but 
  

   seldom 
  was 
  a 
  Quadrula 
  found 
  with 
  the 
  foot 
  extended. 
  

  

  The 
  Shoofly 
  specimens, 
  lots 
  A, 
  B, 
  C, 
  and 
  D, 
  were 
  tagged, 
  weighed, 
  

   etc., 
  June 
  13 
  to 
  16, 
  1910; 
  reclaimed 
  and 
  first 
  checked 
  over 
  in 
  part 
  June 
  

   14 
  and 
  15, 
  1911 
  ; 
  and 
  a 
  second 
  time 
  some 
  wei^ 
  reclaimed 
  and 
  checked 
  

   over 
  September 
  19, 
  1911. 
  

  

  CHIKASKIA 
  RIVER. 
  

  

  In 
  the 
  Chikaskia 
  two 
  lots 
  were 
  planted. 
  These 
  were 
  inclosed 
  with 
  

   a 
  wire 
  netting, 
  as 
  I 
  was 
  a 
  Uttle 
  doubtful 
  in 
  regard 
  to 
  reclaiming 
  free 
  

   Unionidse 
  in 
  the 
  Chikaskia. 
  

  

  