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http://indianaquariumhobbyist.com/community/ :: View topic - how long can female guppies store sperm
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how long can female guppies store sperm

 
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elaine
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PostPosted: Mon Aug 15, 2005 7:22 am Post subject: how long can female guppies store sperm Reply with quote

 I  want  to  breed  a  few  good  male  guppies  I've  had  sometime  to  some  females  I  have  bought  from  a  LFS  recently.I  know  that  guppies  store  sperm  and  can  go  on  having  babies  even  after  being  separated  from  the  male  but  I  don't  know  how  long  they  can  store  the  sperm  for.When  can  I  be  sure  that  the  babies  are  from  the  males  I  have  put  them  with  and  not  the  ones  the  females  were  with  in  the  LFS?
 
 Elaine
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nytyn
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PostPosted: Mon Aug 15, 2005 1:46 pm Post subject:  Reply with quote

 Female  Guppies  are  known  to  hold  sperm,  and  successfully  give  birth  for  a  span  of  6  months.  
 
 I  have  had  two  female  guppies,  which  I  picked  up  from  an  LFS,  which  used  to  drop  young  ones  off,  every  10  or  15  days,  though  there  was  no  male  in  the  tank.  This  kept  happening  for  four  months.
 
 The  best  would  be  to  look  for  virgin  females.  You  could  buy  juveniles,  and  grow  them  out  separately,  feeding  them  heavily,  and  doing  water  changes  well.  This  will  condition  them  well,  and  they  will  grow  fast  too.
 
 Again,  the  characteristics  that  you  like  in  your  males,  may  be  dominated  by  those  in  the  females.  That  risk  is  there,  for  example,  if  you  like  their  finage,  or  color,  and  the  finage,  and  color  in  the  females,  dominates,  you  cannot  do  anything  about  it.
 
 What  I  would  suggest  is,  look  for  similar  looking  females,  from  the  LFS,  but  do  look  for  something  thats  surely  juvenile  size,  so  you  can  be  sure  they  are  clean  [as  in,  virgin  females,  as  they  are  called].
 
 HTH!
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Madan
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PostPosted: Mon Aug 15, 2005 8:17 pm Post subject:  Reply with quote

 I'd  like  to  add  my  2  bits  here.
 
 Females  Guppies  can  store  sperm  indefinitely.  They  will  fertilise  their  eggs  with  the  stored  sperm  when  males  are  not  avialable  due  to  floods  washing  away  all  the  fish  etc.,
 
 The  only  characteristic  of  the  female  that  is  passed  on  to  the  offspring  is  the  form,  shape  and  color  of  the  tail  and  tail  alone,  very  little  if  any  of  the  body  color  will  be  passed  on,  except  in  cases  for  eg.,  you  have  a  Tuxedo  male  and  cross  it  with  a  blond  female,  which  could  be  big  trouble  but  not  impossible  to  eliminate  soon.  Here  you'll  have  to  eleminate  the  females,  body  color  and  tail  charecteristic,  otherwise  all  other  charecteristics  will  be  of  the  male.
 
 The  female  will  produce  offspring  from  the  newest  copulation,
 As  she  has  selected  the  male  taking  into  all  considerations  of  the  environment,  other  available  males  etc.,  and  this  will  ensure  that  her  offspring  have  the  best  survival  mechanisms  available  for  the  environment  she  is  in  right  now.
 
 If  you  want  to  develop  any  particular  charecteristic  of  a  male  guppy,  cross  it  with  a  female  and  then  select  a  female  offspring,  whose  tail  charecteristics  resemble  closet  to  the  father,  with  further  crossings  with  the  father  or  other  males  refine  the  charecteristic  you  want.  With  subsequent  crossings  develop  the  female  tail  to  resemble  the  tail  of  the  male  you  want  to  acheive  or  replicate.
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elaine
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PostPosted: Tue Aug 16, 2005 12:41 am Post subject:  Reply with quote

                                                   
Quote:                
The  female  will  produce  offspring  from  the  newest  copulation,  
 
 
 Does  this  mean  that  if  I  put  my  males  in  with  the  females  then  the  fry  will  be  of  these  males  and  not  of  any  previous  males  the  females  had  been  with?
 
 Elaine
                 
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elaine
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PostPosted: Tue Aug 16, 2005 12:46 am Post subject:  Reply with quote

 Sorry  I  got  the  Quote  thing  wrong,but  the  question  is  the  same
 
 Elaine
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retro_gk
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PostPosted: Tue Aug 16, 2005 4:06 am Post subject:  Reply with quote

 Put  the  males  in  with  the  females,  but  discard  the  first  couple  of  batches  of  fry.  Then  proceed  as  Madan  suggested.
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Madan
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PostPosted: Tue Aug 16, 2005 8:25 am Post subject:  Reply with quote

                                                   
elaine  wrote:                
                                                 
Quote:                
The  female  will  produce  offspring  from  the  newest  copulation,  
 
 
 Does  this  mean  that  if  I  put  my  males  in  with  the  females  then  the  fry  will  be  of  these  males  and  not  of  any  previous  males  the  females  had  been  with?
 
 Elaine
                 
               

 
 Yes,  that  is  correct  Elaine.  As  long  as  the  conditions  provided  for  the  new  spawn  are  excellent.  
 
 There  is  another  drastic  method  some  use  to  eliminate  the  sperm  that  is  stored.  People  inject  high  amounts  of  CO2  to  the  tank  with  the  females,  so  much  so  that  the  fish  is  highly  stressed,  then  the  female  sure  she  would  die  soon,  drops  a  huge  bunch  of  fry,  there  by  eliminating  most  of  the  stored  sperm.
 
 A  couple  of  such  tries  and  more  or  less  all  the  stored  sperm  is  eliminated.
 
 You'd  have  to  be  careful  though,  as  soon  as  the  fry  are  dropped  you  must  drive  the  CO2  out  with  high  aeration.
 
 There  are  variations  to  this  method  but  I  am  not  impressed  by  these.
 
 Worth  a  try  if  you  are  seriously  getting  into  breeding.
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Madan
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PostPosted: Tue Aug 16, 2005 8:42 am Post subject:  Reply with quote

 If  you  can  get  your  hands  on  the  book  -  "  Sex,  Color  and  mate  Choice  in  Guppies"  by  Ann  Houde,  ISBN  No.  0-691-02789-7,  Published  by  -  Princeton  University  Press,  Princeton,  New  Jersey,  USA.  This  book  will  give  you  fascinating  information  from  years  of  research  into  guppy  breeding.
 
 A  wonderful  book,  but  very  very  heavy  to  read.  I  got  my  copy  from  Amazon.com  a  couple  of  years  ago.
 
 A  must  read  if  you  are  even  thinking  of  getting  into  serious  Guppy  breeding.
 
 Breeding  Live  bearers  is  much  quicker  than  say  discus.
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elaine
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PostPosted: Tue Aug 16, 2005 5:19 pm Post subject:  Reply with quote

 Thanks,  I  think  I'll  wait  for  a  few  months  rather  than  risk  losing  the  females  with  the  CO2  treatment.  Anyway  I  am  a  novice  and  uptil  now  have  been  happy  with  whatever  babies  I've  got,  it's  only  now  I  want  to  try  my  hand  at  getting  better  fish  by  breeding  good  female  to  good  males.  
 
 Elaine
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hayath_dyno
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PostPosted: Tue Aug 16, 2005 6:01 pm Post subject:  Reply with quote

 I  second  the  thoughts  of  Elaine.  The  CO2  might  really  stress  out  Thumb Down    the  poor  fish  which  would  have  gone  through  so  much  to  develop  babies  inside  its  body.
 It  is  always  a  joy  to  see  new  life  in  your  aquarium.  I  have  had  that  feeling  a  few  days  back  and  seems  like  the  second  female  molly  is  ready  to  drop  a  few  in  some  days  (can  see  the  black  spot  in  its  tummy)  and  guess  what  even  the  silver  molly  has  a  square  chest  and  seems  to  have  put  on  weight  (have  to  get  yet  another  tub  for  them  to  give  birth  in)
   I  think  it  is  much  better  to  let  the  female  drop  the  babies  (regardless  of  what  you  do  to  the  fr,  use  them  as  feed  or  otherwise)  rather  than  risk  stressing  out  the  female  with  techniques  like  CO2  or  anything  others  like  that  (remember  she  is  the  one  who  is  going  to  give  birth  to  the  future  brood  [quality  guppies]  that  you  want)
 
 Well  that's  my  opinion  on  this.
 
 Cheers,
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