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http://indianaquariumhobbyist.com/community/ :: View topic - Indian Hillstream loaches
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Indian Hillstream loaches
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random2
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PostPosted: Tue Jan 24, 2012 9:21 am Post subject: Re: Indian Hillstream loaches Reply with quote

 Beautiful  fishes.  They  are  the  fastest  swimmers  I  have  seen  in  the  wild.  
 
 Nayak,  will  try  to  visit  your  place  this  week.  The  snaps  are  making  me  Drool
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PostPosted: Tue Jan 24, 2012 12:34 pm Post subject: Re: Indian Hillstream loaches Reply with quote

 These  are  some  cracking  hill  stream  fish  and  nicely  documented  as  well.   Thumb Up
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PostPosted: Tue Jan 24, 2012 12:51 pm Post subject: Re: Indian Hillstream loaches Reply with quote

 Beautiful  looking  loaches.  Even  I  thought  that  the  colour  diff  may  be  sexual  dimorphism
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PostPosted: Mon Jan 30, 2012 1:33 pm Post subject: Re: Indian Hillstream loaches Reply with quote

                                                   
beta  wrote  (View  Post):                
Hi,
 Thought  I  would  initiate  a  discussion  on  the  Indian  Hillstream  loaches.  The  objective  of  the  thread  is  to  identify  the  fishes,  share  biotope  pics,  understand  requirements  and  share  first  hand  experiences  in  caring  for  these  fishes.
 
 
Key  to  Genera
 1.  Gill  opening  small  and  situated  entirely  above  base  of  pectoral  fins.  :  Bhavania  Hora
         Gill  openings  of  moderate  size  extending  to  the  ventral  surface  for  a  short  distance.  ->  2
 2.  Pectoral  fins  with  19-21  rays.  8  to  10  outer  rays  unbranched.  :  Balitora  Gray
         Pectoral  fins  with  14-20  rays,  three  to  eight  outer  rays  unbranched.  ->  3
 3.  Rostral  groove  in  front  of  mouth  absent  or  very  poorly  developed.  Rostral  fold  absent  or  very  slightly  developed.  Rostral  barbels  four.  :  Homaloptera  van  Hasselt
         Rostral  groove  in  front  of  mouth  present,  overhung  by  rostral  fold.  Rostral  barbels  seven  or  more.  :  Travancoria  Hora
 
 
Balitora  Gray,  1832
 Diagnosis:  Anterior  part  of  body  and  abdomen  greatly  depressed,  ventral  surface  flattened.  Head  flat,  depressed.  Snout  broad,  rounded,  provided  with  trenchant  margins,  covered  with  small  sharp  tubercles.  Mouth  small,  inferior,  transverse  and  slightly  arched.  Eyes  dorso-lateral,  not  visible  from  below  ventral  surface.  Lips  on  lower  jaw  continuous  with  the  upper  one  at  angle  of  mouth  and  paillated,  does  not  cover  the  lower  jaw.  Lower  jaw  sharp,  strong,  with  a  horny  substance,  Jaws  and  palate  without  teeth.  Four  short  thick  rostral  barbels  and  one  pair  maxillary.  Dorsal  fin  inserted  above  or  slightly  ahead  of  pelvic  ins  and  with  12  rays  (nine  branched).  Anal  fin  short  with  seven  rays  (five  branched).  Paired  fins  broad  and  horizontal.  Pectoral  fins  with  19-21  rays  (8-10  simple  and  11-12  branched).  Pelvic  fins  with  11  rays  (two  simple  and  nine  branched).  Caudal  fin  forked.  Lateral  line  complete  with  68-70  scales.  Scales  small.
 
 Balitora  brucei  Gray,  1830
 Key:  Head  length  6.5  in  total  length.  Lateral  line  scales  more  than  65  (65  or  68  )
 Colouration:
 Distribution:  Eastern  Himalayas;  Meghalaya:  Khasi  Hills;  West  Bengal:  Darjeeling
 Habitat:  Torrential  Streams
 Size:  9.0  cm  SL.
 
 Balitora  mysorensis  Hora,  1941
 Key:  Head  length  5.0-6.4  in  total  length.  Lateral  line  scales  not  more  than  65  (64  or  65)
 Colouration:  Color  is  greenish  brown  with  blothes  along  the  dorsum  and  the  lateral  line.  The  bands  on  the  lateral  side  coalesce  to  form  a  band.  Belly  is  dirty  white.  Pectoral  and  ventral  fins  have  a  ray  of  dots.  Caudal  fin  has  a  longer  lobe  with  a  horizontal  dark  shade.
 Distribution:  Western  Ghats:  Karnataka  (Cauvery  and  Thungabhadra  River  Systems).
 Habitat:  Torrential  Streams
 Size:  9.0  cm  SL.                

 
 And  here  goes  the  Key'ing  Very Happy  
 
 
 
 
 
 
 
 
 
 Wherever  I  have  a  question  mark,  the  observation  differs  from  the  literature.  Have  I  made  any  mistakes????
 
 Regards,
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Tabby
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PostPosted: Mon Jan 30, 2012 1:53 pm Post subject: Re: Indian Hillstream loaches Reply with quote

 Seriously  commendable  work  put  in  there!
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Marc
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PostPosted: Mon Jan 30, 2012 8:28 pm Post subject: Re: Indian Hillstream loaches Reply with quote

                                                   
rasikanayak  wrote  (View  Post):                

 Wherever  I  have  a  question  mark,  the  observation  differs  from  the  literature.  Have  I  made  any  mistakes????
                 

 
 Ok,  lets  try  to  answer  one  by  one   :)
 
 1)  8  unbranched  rays  in  pectoral  fin  -  Balitora  -  (Ref  Jayaram  1999)
 
 2)  18  -  20  pectoral  rays  (10-11  branched)  -  Balitora  mysorensis  -(Ref  Talwar  &  Jhingran  1991)  
 *the  last  one  or  two  branched  rays  are  sometimes  feeble  and  pressed  against  the  body  thereby  giving  a  chance  for  oversight  when  trying  to  identify  with  photos.  
 
 3)  I  feel  the  pelvic  fin  count  should  be  3  unbranched  9  branched.  Adhesive  pads  on  3-4  rays  on  the  pelvic  fin  -  Balitora  -(Ref  Talwar  &  Jhingran  1991)
 *  the  presence  of  the  adhesive  pads  on  the  branched  rays  also  sometimes  tend  to  confuse  and  thereby  pelvic  fin  rays  count  is  not  a  good  key  feature.
 
 4)  Dorsal  2-3  unbranched;  8-9  branched  rays  -  Balitora  mysorensis  -(Ref  Talwar  &  Jhingran  1991)
 
 Guess  we  need  a  combination  of  literature  to  key  in  a  species.  Good  job  Nayak   Thumb Up  really  good  photo  documentation.  Hope  I  have  answered  your  questions.
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PostPosted: Tue Jan 31, 2012 10:22 am Post subject: Re: Indian Hillstream loaches Reply with quote

                                                   
Tabby  wrote  (View  Post):                
Seriously  commendable  work  put  in  there!                

 Tabrez,  Thanks.  Trying  to  decipher  the  Enigma  codes  of  Ichythyology   Very Happy  
 
 Marc,  Thanks  a  lot   Very Happy   
 So  I  got  the  unbranched  rays  in  the  pectoral  fin  and  the  total  rays  in  the  dorsal  fin  correct.  The  unbranched  rays  in  the  Pectoral  fins  might  need  a  hand  count  by  catching  the  specimen.........  On  second  thoughts  I  will  take  your  word  for  it  Chuckle  
 
 Now  where  are  the  adhesive  pads?????  How  do  you  make  them  out?
 Pic  taken  in  ambient  fluorescent  light  without  flash.
 
 
 Regards,
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PostPosted: Tue Jan 31, 2012 10:41 am Post subject: Re: Indian Hillstream loaches Reply with quote

 These  thickened  rays  are  adhesive  pads.
 
 
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PostPosted: Wed Feb 01, 2012 11:26 am Post subject: Re: Indian Hillstream loaches Reply with quote

 Oh,  and  as  an  Engineer  I  imagined  that  the  adhesive  pads  might  look  like  minature  suction  cups  used  to  anchor  silicon  tubes  in  the  aquarium.  You  learn  something  new  every  day  Chuckle  
 
 Mark,  Thanks  once  again.  Very Happy  
 
 Regards,
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PostPosted: Wed Feb 01, 2012 11:33 am Post subject: Re: Indian Hillstream loaches Reply with quote

                                                   
rasikanayak  wrote  (View  Post):                
Oh,  and  as  an  Engineer  I  imagined  that  the  adhesive  pads  might  look  like  minature  suction  cups  used  to  anchor  silicon  tubes  in  the  aquarium.  You  learn  something  new  every  day  Chuckle  
 
 Mark,  Thanks  once  again.  Very Happy  
 
 Regards,                

 
 Ha  ha  ha....sure  sounds  misleading.  
 
 You're  welcome  Nayak   Very Happy
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PostPosted: Wed Feb 01, 2012 12:00 pm Post subject: Re: Indian Hillstream loaches Reply with quote

 Now  if  only  all  the  fishy  books  out  there  had  such  great  descriptions  and  photographs...
 Great  explanation  Nayak  and  Marc,  thanks,  first  time  I  have  read  through  all  the  posts  that  mention  branched  rays  and  unbranched  rays  in  its  entirety  Very Happy
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PostPosted: Wed Feb 08, 2012 9:09 pm Post subject: Re: Indian Hillstream loaches Reply with quote

 Hi
 
 If  any  of  IAH  members  are  keeping  Hill  Stream  Loaches  of  the  Subfamily: Balitorinae,  it  would  be  great  if  they  could  please  post  pictures  detailed  macro  pictures  of  the  Mouth  Structure  and  other  key  identification  factors  like  what  Nayak  has  done  and  along  with  it  what  he  /  she  feels  the  species  is  and  where  it  was  collected  we  could  probably  get  to  identify  the  speciese  type  more  accurately.
 
 Any  contribution  to  is  in  this  post  would  be  a  great  help  and  will  make  the  thread  more  comprehensive  and  informative  and  accurate.
 
 Many  Thanks
 
 Sujoy
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PostPosted: Wed Mar 21, 2012 4:27 pm Post subject: Re: Indian Hillstream loaches Reply with quote

 Travancoria  elongata  Pethiyagoda  &  Kottelat,  1994  
 Chalakudy  River  
 
 
 
 Description:-
 
 
 Ventral  View:-  
 
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PostPosted: Wed Mar 21, 2012 5:33 pm Post subject: Re: Indian Hillstream loaches Reply with quote

 Sujoy,
 
 Lovely  pics  Clapping  
 
 Another  fish  in  my  "TO  HAVE"  list.
 
 Regards,
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PostPosted: Wed Mar 21, 2012 11:34 pm Post subject: Re: Indian Hillstream loaches Reply with quote

 One  good  specimen  and  next  explanation!
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