Hi Jaikumar,

Reports on ice-ice, a viral infection? a side effect of physico-chemical parameters (can be attribute to temperature) is one and

Rabbit fishes (Siganus spp) are voracious feeders on Kapp and there are many reports available where they have nibbled  shoot tips and allow stunted/ blunt/ spread growth. 

Besides, depending on the culture type, if  it is monoline culture, sedimentation can also play a part

regards

Deepak

Hi,

In addition to all those factors described by Mr. Deepak, salinity of seawater too will affect the growth of Kappaphycus.

100% in agreement with Dr CRK Reddy!

There are many environmental factors. Instead of starting a list of them, I refer you to an excellent book: Seaweed Ecology and Physiology, by Hurd, Harrison, Bischof and Lobban. It covers many factors and will give you an opportunity to dig deeper on certain of them.

After looking at environmental factors, I recommend that you also look at economic and societal factors. They are also key and should not be underestimated.

Thank you for your  prompt response. There are three  different color pattern Green, brown  and red are noticed in kappaphycus. I would like to know how these color patterns  are forming ?  and what it indicates?.

        Several investigators stated that majorly due to  chlorophyll pigments or depth factor or nutrients.  

Is there any method other than chlorophyll estimation  to measure pigments in Thallus . 

Hi Jaikumar, Herbivory by Siganus  is a serious problem in seaweed mariculture experiemnts. But can be ignored for large scale cultivation. Frequent husbandry practices can keep them away and reduce the incidence.

Well regarding your interest on dimorphic thallus of Kappaphycus, the colour pattern of fronds is mainly caused by irradiance  due to depth of water column above the fronds and the water quality. You can culture the thallus bits of both the colours in  separate lines  in a single raft.Wish you good luck

 Thank you sir, and one more questions i found plenty of leach type organisms in Kappaphycus seaweed and animal  body is round,cylindrical i don't know the species whether it is  (polyclad flat worm or Nudibranch). I want to know the species. Please help me .

Dear Jaikumar, It is a  shellless mollusc. I shall let you know the species  by tomorrow. Is it grazing on kappaphycus?. with regards

Thank you very much sir

 Sir I need to know the species of Shell less mollusc.

Thankyou 

Sorry Jaikumar, I am  still trying to get it identified. 

Ok Sir if you Know please tell me 

Thank you 

Did any body identify the Micro bivalve which i seen in seaweed.

These are spats of pearl oysters, mostly Pinctada sp

Thank you sir