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:: Volume 5, Issue 2 (2-2019) ::
3 2019, 5(2): 29-36 Back to browse issues page
The effects of Marigold as natural carotenoids on scale chromatophores’ variations in blue gourami under different stocking densities
M Jorjani * , M Sharifroohani , A Mirhashemi Rostami , T Enayat Gholampoor , M.R Mirzaei , A Tan Shau Hwai
Inland Waters Aquatic Stocks Research Center, Gorgan
Abstract:   (172 Views)
Skin coloration is important in ornamental fish.  Fish  coloration  is  due  to  the  presence  of  chromatophores,  which  contain  pigments  and  are  usually  located  in  dermis.  In  this  study,  the  effects  Marigold  as  natural  carotenoids  was  investigated  on  fish  scale  chromatophores’  variations  under  different  stocking  densities.  For  this,  diet  containing  2.5%  Marigold  along  with  a  control  diet  were  fed  to  the  fish  held  at  two  stocking  densities  of  20  and  30  fish (0.6 and 0.9 fish/Liter).  After  70  d,  changes  in  chromatophores  were  monitored  in  fish  scales  upper  lateral  line.  The fish initial weight was 0. 80±0.02 g.  Each treatment had three replications.  According  to  the  results,  four  different  chromatophores,  including  Punctate,  Punctate-stellate,  Stellate,  Stellate-reticulate  were  observed  in  the  fish  at  the  higher  density.  The  results  suggest  that  increase  in  stocking  density  alters  chromatophores  type  and  results  in  hypermelanosis  that  affects  body  surface  and  neural  system;  thus  chromatophores  indicate  stress  contamination. 
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Type of Study: Research | Subject: disease and hematology
Received: 2019/01/27 | Accepted: 2019/01/27 | Published: 2019/01/27
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Jorjani M, Sharifroohani M, Mirhashemi Rostami A, Enayat Gholampoor T, Mirzaei M, Tan Shau Hwai A. The effects of Marigold as natural carotenoids on scale chromatophores’ variations in blue gourami under different stocking densities. 3. 2019; 5 (2) :29-36
URL: http://sifisheriessciences.com/article-1-129-en.html


Volume 5, Issue 2 (2-2019) Back to browse issues page
Survey in Fisheries Sciences Survey in Fisheries Sciences
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