The effects of Marigold as natural carotenoids on scale chromatophores’ variations in blue gourami under different stocking densities

Authors

  • Enayat Gholampoor, T Inland Waters Aquatic Stocks Research Center, Gorgan
  • Jorjani, M Inland Waters Aquatic Stocks Research Center, Gorgan
  • Mirhashemi Rostami, A Inland Waters Aquatic Stocks Research Center, Gorgan
  • Mirzaei, M.R Offshore Fisheries Research Center, Chabahar, Iran
  • Sharifroohani, M Agricultural Research Education & Extension Organization, Tehran, Iran
  • Tan Shau Hwai, A School of Biological Sciences, Universiti Sains Malaysia, Penang, Malaysia
Abstract:

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. 

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

Effects of Hibiscus rosasiensis as a natural carotenoid on growth performance, body composition, pigmentation and carotenoid in blood plasma of blue gourami, Trichogaster trichopterus at different stocking densities

This study examined the effects of China rose powder (Hibiscus rosasiensis) supplementation (1.5%) on the growth performance, body composition, and pigmentation of blue gourami at different stocking densities (0.6 and 0.9 fish L-1). Four treatments were assigned in this study: China rose diet+0.6 fish L-1 (CG0.6), China rose diet+0.9 fish L-1 (CG0.9), control diet+0.6 fish L-1 (C0.6) and contro...

full text

Effects of Hibiscus rosasiensis as a natural carotenoid on growth performance, body composition, pigmentation and carotenoid in blood plasma of blue gourami, Trichogaster trichopterus at different stocking densities

This study examined the effects of the supplementation of China rose powder of Hibiscus rosasiensis towards blue gourami with different stocking densities.China rose (1.5%) was used on two different stocking densities (20 and 30 fishes per aquarium). The group that contain a total of 20 (individual/aquarium) and 30 (individual/aquarium) densities of fishes, are referred as CH1 and CH2 respectiv...

full text

the effects of changing roughness on the flow structure in the bends

flow in natural river bends is a complex and turbulent phenomenon which affects the scour and sedimentations and causes an irregular bed topography on the bed. for the reason, the flow hydralics and the parameters which affect the flow to be studied and understand. in this study the effect of bed and wall roughness using the software fluent discussed in a sharp 90-degree flume bend with 40.3cm ...

The effects of oxygen supplementation on growth and survival of rainbow trout (Oncorhynchus mykiss) in different stocking densities

In this study, the effects of oxygen supplementation in different stocking densities of rainbow trout (Oncorhynchus mykiss) on the specific growth rates (SGR), feed conversion ratios (FCR) and survival rates were investigated in a commercial-scale culture system. High density cultures were maintained in a total of nine (12 m3) flow-through systems supplemented with O2. Initial stocking rates fo...

full text

The effects of oxygen supplementation on growth and survival of rainbow trout (Oncorhynchus mykiss) in different stocking densities

In this study, the effects of oxygen supplementation in different stocking densities of rainbow trout (Oncorhynchus mykiss) on the specific growth rates (SGR), feed conversion ratios (FCR) and survival rates were investigated in a commercial-scale culture system. High density cultures were maintained in a total of nine (12 m3) flow-through systems supplemented with O2. Initial stocking rates fo...

full text

critical period effects in foreign language learning:the influence of maturational state on the acquisition of reading,writing, and grammar in english as a foreign language

since the 1960s the age effects on learning both first and second language have been explored by many linguists and applied linguists (e.g lennerberg, 1967; schachter, 1996; long, 1990) and the existence of critical period for language acquisition was found to be a common ground of all these studies. in spite of some common findings, some issues about the impacts of age on acquiring a second or...

15 صفحه اول

My Resources

Save resource for easier access later

Save to my library Already added to my library

{@ msg_add @}


Journal title

volume 5  issue 2

pages  29- 36

publication date 2019-02

By following a journal you will be notified via email when a new issue of this journal is published.

Keywords

No Keywords

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023