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http://indianaquariumhobbyist.com/community/ :: View topic - Zebra fish egg and fry harvest
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Zebra fish egg and fry harvest

 
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danios
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PostPosted: Wed Feb 25, 2009 2:21 pm Post subject: Zebra fish egg and fry harvest Reply with quote

 I  have  a  385  litres  cement  tank  where  I  have  been  having  zebra  fish  (20  numbers).   When  I  bought  them  in  the  second  week  of  january,  they  were  just  juveniles  just  about  half  an  inch  size  (only  the  length  of  body  without  the  caudal  fine).   In  just  about  a  month  and  a  half,  they  have  grown  to  more  than  an  inch  and  began  spawning.   I  have  read  that  zebras  eat  their  eggs  and  larvae.   Since  the  tank  was  a  cement  tank  with  fine  and  coarse  sand  at  the  bottom  of  about  2  feet  deep,  I  really  could  not  get  to  finding  the  eggs  and  the  fry.   But  I  noticed  that  some  of  the  zebra  fish  have  been  spawning  around  the  water  hyacinth  plant  playing  in  between  the  hairy  and  wide  spreading  roots.   I  saw  them  often  spawning  around  the  base  of  the  water  hyacinth  plant.   I  took  a  bucket  tipped  it  slowly  into  the  tank,  under  the  water  hyacinth  plant  careful  not  to  disturb  the  plant  as  such  for  fear  of  dislodging  the  eggs  that  may  be  have  been  scattered  within  the  roots.   When  the  entire  plant  was  inside  the  bucket,  I  kept  the  bucket  with  the  plant  under  shade.   Then  after  24  hours....bingo...  I  could  see  the  first  really  very  tiny  5  zebra  fish  fries  darting  around  in  the  bucket.   Today  (25th  Fed  2009)  I  saw  20  of  them  and  still  some  more  in  the  larval  stage  stuck  to  their  yolk  sac  in  the  bottom  of  the  bucket.   
 
 Just  wondering  when  should  I  start  feeding  them  after  they  are  free  swimming...  Any  ideas  please.   It  is  24  hourse  since  the  first  fries  are  free  swimming.   If  so  what  should  I  be  feeding  them.
 
 P.S.  I  have  been  feeding  the  adult  zebra  fish  initially  with  dried  tubifex  worms,  occassionally  with  egg  yolk  (yellow),  sliced  earthworms,  and  finally  for  the  past  3  weeks  with  bloodworms.
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psimhan
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PostPosted: Wed Feb 25, 2009 2:39 pm Post subject: Re: Zebra fish egg and fry harvest Reply with quote

 Ideally,  you  should  feed  them  infusoria  (green  water)  for  the  first  week  and  then  move  on  to  artemia.
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danios
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PostPosted: Wed Feb 25, 2009 2:47 pm Post subject: Re: Zebra fish egg and fry harvest Reply with quote

 Thank  you..  But  there  are  two  other  things.,..
 
 One..how  long  should  I  wait  after  the  fries  hatch  and  swim  free  before  I  start  feeding  them  with  infusoria
 
 Two..  any  alternatives  to  artemias  please..  as  they  seem  not  available  in  Madurai  area
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psimhan
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PostPosted: Wed Feb 25, 2009 2:51 pm Post subject: Re: Zebra fish egg and fry harvest Reply with quote

 You  can  feed  them  the  day  after  they  are  free  swimming.
 
 Microworms  or  daphnia  -  although  daphnia  may  be  a  bit  too  big.
 Contact  surya_niki  for  a  microworm  culture.
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retro_gk
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PostPosted: Wed Feb 25, 2009 2:59 pm Post subject: Re: Zebra fish egg and fry harvest Reply with quote

 Just  leave  the  fry  in  the  tank  with  the  adults.  Enough  numbers  will  survive  to  maintain  the  population.
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danios
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PostPosted: Wed Feb 25, 2009 4:21 pm Post subject: Re: Zebra fish egg and fry harvest Reply with quote

 I  am  sure  I  have  seen  the  zebras  spawning  for  the  last  3  weeks  but  I  have  not  seen  a  single  fry  yet.   I  am  sure  every  egg  and  fry  are  being  eaten  up  by  the  adults.   It  was  then  I  decided  to  separate  out  this  water  hyacinth  plant  from  the  tank.   I  think  I  have  lost  hundreds  of  fries  to  the  adults  since  the  last  3  weeks.  
 
 The  bucket  in  which  the  fries  are  here,  I  could  see  algal  growth  in  patches.   Even  the  roots  of  water  hyacinth  looks  more  like  a  green  mush..   Can  the  fry  survive  feeding  on  this  algae  or  the  greenish  mush  .
 
 Is  it  possible  that  bacteria  and  single  celled  paramacium  are  present  in  the  bucket?   Though  the  water  looks  quite  clear  to  me,  as  I  could  see  the  bottom  of  the  bucket  very  well.
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danios
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PostPosted: Wed Feb 25, 2009 4:34 pm Post subject: Re: Zebra fish egg and fry harvest Reply with quote

                                                   
psimhan  wrote  (View  Post):                
You  can  feed  them  the  day  after  they  are  free  swimming.
 
 Microworms  or  daphnia  -  although  daphnia  may  be  a  bit  too  big.
 Contact  surya_niki  for  a  microworm  culture.                

 
 How  do  I  contactg  surya_niki...?
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Shankar
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PostPosted: Wed Feb 25, 2009 4:52 pm Post subject: Re: Zebra fish egg and fry harvest Reply with quote

                                                   
danios  wrote  (View  Post):                
How  do  I  contactg  surya_niki...?                

 
 Phone-a-friend  @  9945689401.
 
 Your  bucket  should  hardly  have  sufficient  feed  for  the  fry.  Just  bring  home  a  mug  of  water  collected  from  any  unpolluted  pond  in  your  area.  Collect  it  before  the  sun  shines  bright.   Thumb Up
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banjohead
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PostPosted: Wed Feb 25, 2009 5:06 pm Post subject: Re: Zebra fish egg and fry harvest Reply with quote

 In  addition,  if  you  want  a  few  productive  spawnings,  try  and  separate  a  ripe  female,  place  here  in  a  shallow  tank  with  a  male  or  two  and  lay  it  with  a  large  substrate.
 By  large  i  mean  one  that  would  have  little  pockets  and  spaces  in  it,  like  those  garish,  large  stones  they  sell  at  almost  every  lfs.  Or  marbles.
 Keep  the  water  level  low.
 
 The  eggs  and  fry  should  find  considerable  protection  that  way.
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