Recent Posts

Carotenoids and their role in shrimp life

Carotenoids and their role in shrimp life

     Shrimp keepers and breeders are always looking into ways to improve color and brightness of their shrimps. While careful breeding and selection plays a big role in the perfect and gorgeous tint, let’s talk about what any hobbyist could do today by supplementing pigment improving elements into the shrimp diet. And the stars here are carotenoids.

     Carotenoids are a family of over 600 natural lipid-soluble pigments that are produced within microalgae, phytoplankton, and higher plants. They are responsible, in combination with proteins, for many of the brilliant yellow to red colors in plants and the wide range of blue, green, purple, brown and reddish colors of fish and crustaceans.

     However, shrimps are unable to produce carotenoids including astaxanthin themselves, only plants and protists (bacteria, algae, fungi) are capable of synthesizing carotenoids.

     Ever wonder why shrimp look red when cooked? Here is when carotenoproteins come into play. Carotenoids form a bond with proteins and when this bond is broken due to the high temperature, then the reddish color of the carotenoid, most often astaxanthin, replaces the natural color of the shrimp produced by the carotenoproteins.

     In Caridina shrimp the pigments are found in the cuticle (exoskeleton) or in specialized cells called chromatophores. Chromatophores are mostly responsible for color underneath the cuticle deeper in the body.

Chromatophores are broken into four main categories:

  • Black chromatophores, containing ommochromes, which absorb light
  • Red chromatophores, generally containing astaxanthin
  • Yellow chromatophores, generally containing lutein
  • White chromatophores, containing pterines or flavines, which reflect light

 

     Astaxanthin is one of the most powerful carotenoids. Survival was higher in shrimps fed the astaxanthin diet, and a positive correlation between survival and pigment concentration of tissues suggested that the carotenoids functioned as an intracellular oxygen reserve.

     Shrimp fed astaxanthin at 100 mg/kg diet had an average survival rate of 77% in contrast to shrimp supplemented with β-carotene which averaged 40% (Chien 1996).

     Additional benefits of this essential carotenoid include roles as an antioxidant and provitamin A activity, as well as enhancing immune response, reproduction, growth, maturation, photoprotection, and defense against hypoxic conditions.

     Astaxanthin is crucial supplement for shrimps as it improves not only color but affects survival rates as well.

Red Cherry Shrimps were fed astaxanthin diet for 8 weeks and kept in 3 different color gravels (white, red and black)

After 8 weeks researches could easily observe color difference, weight gain and survivability.

 

 

 

 

 

     There are some unexpected natural sources of astaxanthin as well. Paprika contains the xanthophylls beta-carotene, beta-cryptoxanthin, capsanthin and capsorubin, some of which can be slowly converted to astaxanthin.

     Astaxanthin is added to most commercial complete food for shrimp produced by companies such as Shrimp King, Shirakura, MK Breed, Garnelenhaus.

     You can also supplement shrimps with other carotenoids using natural alternatives. Natural snacks for shrimps that contain carotenoids: marigold petals, pumpkin, carrots, spinach, mulberry leaves,dandelions, moringa, kale.

 

 

 

Sources:

Goodwin T.W. The Biochemistry of the Carotenoids, 2nd ed., Chapman and Hall, London, 1984, pp. 64-96

A Review of the Carotenoid, Astaxanthin, as a Pigment and Vitamin Source for Cultured Penaeus Prawn By Todd Lorenz, Ph.D

Matsuno T. and S. Hirao. Marine Carotenoids, in “Marine Biogenc Lipids, Fats, and Oils” (ed. by R. G. Ackman), Vol. 1, CRC Press, Florida, 1989, pp. 251-388.

Effect of Dietary Astaxanthin and Background Color on Pigmentation and Growth of Red Cherry Shrimp, Neocaridina heteropoda

Department of Animal Production Technology and Fisheries Faculty of Agricultural Technology,

Nongnuch Laohavisuti and Uscharee Ruangdej

Remarkable Shrimps: Adaptations and Natural History of the Carideans  Raymond T. Bauer

 

23 Comments

    • Avatar
      Georgia Colleano
      Jul 30, 2019

      Shrimp is very good for health.it is very nutritious and contains proteins. It is good for your hair growth as well. It is low on fat component and heart patients can easily eat it. You can find different fish containing recipes at best essay that you must try making at home.

    • Avatar
      jessicaalex
      Aug 15, 2019

      I love the service of this best construction company of this country that's why, always contact with this company whenever needed. I think, folks should try to get its do my paper for me services once and then they will be impressed by the construction work.

    • Avatar
      dawson allian
      Sep 30, 2019

      Thanks a lot for the kind of perfect topic I have not a lot of information about it but I have got an extra unique info in your unique post Cheap online store Australia Perfect description you have provided thanks for sharing.

    • Avatar
      susanrichard
      Oct 12, 2019

      Thanks a lot for the kind of perfect topic I have not a lot of information about it but I have got an extra unique info in your unique post.expert assistance service Perfect description you have provided thanks for sharing.

    • Avatar
      lifetime
      Nov 20, 2019

      I have express a few of the articles on your website now, and I really like your style of blogging. I added it to my favorite’s blog site list and will be checking back soon… Leptitox

    • Avatar
      Daily
      Nov 21, 2019

      Great info! I recently came across your blog and have been reading along. I thought I would leave my first comment. I don’t know what to say except that I have. Daily

    • Avatar
      Flat Belly Fix
      Nov 21, 2019

      I feel really happy to have seen your webpage and look forward to so many more entertaining times reading here. Thanks once more for all the details. Flat Belly Fix

    • Avatar
      Ex Factor Guide
      Nov 21, 2019

      The blog and data is excellent and informative as well Ex Factor Guide

    • Avatar
      Would You Rather Questions
      Nov 23, 2019

      I feel very grateful that I read this. It is very helpful and very informative and I really learned a lot from it. Would You Rather Questions

    • Avatar
      General Contractor
      Nov 25, 2019

      Thanks for such a great post and the review, I am totally impressed! Keep stuff like this coming. General Contractor

    • Avatar
      Chona Jill
      Nov 25, 2019

      Its actually an extraordinary post I truly like it and truly valued on the off chance that you are a mother of father of you infant, at that point remember to purchase a baby stroller as these are useful to guardians. Keep it out of the sun. During blistering climate, don't give your baby stroller a chance to sit in the sun for significant stretches of time. This can make plastic and metal pieces become hot enough to consume your child. In the event that you leave the carriage in the sun, check the baby stroller surface temperature before putting your infant in the stroller. If you dont have a baby stroller buy baby stroller here in Dubai and mover your baby with comfort

    • Avatar
      General Contractor
      Nov 25, 2019

      There is definately a great deal to know about this subject. I like all of the points you've made. General Contractor

    • Avatar
      General Contractor
      Nov 25, 2019

      Good to become visiting your weblog again, it has been months for me. Nicely this article that i've been waited for so long. I will need this post to total my assignment in the college, and it has exact same topic together with your write-up. Thanks, good share. General Contractor

    • Avatar
      General Contractor
      Nov 25, 2019

      I am always searching online for articles that can help me. There is obviously a lot to know about this. I think you made some good points in Features also. Keep working, great job ! General Contractor

    • Avatar
      General Contractor
      Nov 25, 2019

      Easily, the article is actually the best topic on this registry related issue. I fit in with your conclusions and will eagerly look forward to your next updates. Just saying thanks will not just be sufficient, for the fantasti c lucidity in your writing. I will instantly grab your rss feed to stay informed of any updates. General Contractor

    • Avatar
      General Contractor
      Nov 25, 2019

      Thanks for sharing this information. I really like your blog post very much. You have really shared a informative and interesting blog post . General Contractor

    • Avatar
      General Contractor
      Nov 25, 2019

      Great tips and very easy to understand. This will definitely be very useful for me when I get a chance to start my blog. General Contractor

    • Avatar
      General Contractor
      Nov 25, 2019

      Cool stuff you have and you keep overhaul every one of us General Contractor

    • Avatar
      How to Build Muscle
      Nov 27, 2019

      Great info! I recently came across your blog and have been reading along. I thought I would leave my first comment. I don’t know what to say except that I have. How to Build Muscle

    • Avatar
      Text Chemistry
      Nov 27, 2019

      I feel really happy to have seen your webpage and look forward to so many more entertaining times reading here. Thanks once more for all the details. Text Chemistry

Leave a Reply

* Name:
* E-mail: (Not Published)
   Website: (Site url withhttp://)
* Comment:
Type Code
Product successfully added to the product comparison!