Ich and live rock

[Bratyboy2]

What I find odd is if the ich will die in 1-2 days with out a host then why 10 weeks? And the reason I ask that is because if the cyst can lie dormant then how does it relieve the rock from ever carrying it? The way it sounds is its lying dormant on the fish and with out meds or hypo treatment they won't be ever gone hence the reason we treat them. Plus the cyst gets no nuritment from inverts do to there outer skeleton or corals after a dip and the rock has nothing to offer either....so again why does a 10 week period or a period of time even need to be for rock?

 

[billsreef]

The longest recorded for time a cyst to remain viable and "hatch" is 72 days. Documented in a research paper, IIRC by Blasiola.

 

[Bratyboy2]

Do you have the study on this?

 

[oldsaint]

Do you have the study on this?

There is a ton of really great info in the previous links provided.


http://edis.ifas.ufl.edu/fa164

In one study (Colorni and Burgess 1997), theronts emerged from a group of tomonts sometime between 3 and 72 days, with most released from 4 to 8 days after tomont formation.

 

[Bratyboy2]

With that quote u just posted is sentence of sometime just insures that it was not an accurate study....

 

[jerpa]

With that quote u just posted is sentence of sometime just insures that it was not an accurate study....

I'm not sure what you are getting at but the lifecycle of ich is well researched. The sentence states the range of 3-72 days because they can emerge from the tomonts anywhere in that time span. The word sometime does not indicate it is invalid or inaccurate.

What I find odd is if the ich will die in 1-2 days with out a host then why 10 weeks? And the reason I ask that is because if the cyst can lie dormant then how does it relieve the rock from ever carrying it?The way it sounds is its lying dormant on the fish and with out meds or hypo treatment they won't be ever gone hence the reason we treat them. Plus the cyst gets no nuritment from inverts do to there outer skeleton or corals after a dip and the rock has nothing to offer either....so again why does a 10 week period or a period of time even need to be for rock?

I think you may be confused. The free-swimming stage of ich, that hatches from the tomonts, must find a host within 48 hours. After finding a host they feed for up to 7 days. They then leave the host and form a cyst, or tomont, on the substrate not the fish. At this stage the parasite reproduces, with no need for a host, and hatches sometime in the span mentioned above. The fallow period is to allow these tomonts to hatch and die without a host being present to contine the cycle.

 

[mikecc67548]

With that quote u just posted is sentence of sometime just insures that it was not an accurate study....

A little help for the English impaired?

 

[mikecc67548]

Only time it is visable is when it is seen on the fish, where it stays for what? 3-5 days I think. If it is on gills, as it so often is, it can not be seen.

I'd like to see a pic of the cyst on glass. I might just go google that.

 

[billsreef]

Do you have the study on this?

There is a ton of really great info in the previous links provided.


http://edis.ifas.ufl.edu/fa164

In one study (Colorni and Burgess 1997), theronts emerged from a group of tomonts sometime between 3 and 72 days, with most released from 4 to 8 days after tomont formation.

It's the work by Colorni I was thinking of. He's got a number of papers on the subject worth looking up.