Bacteria Can Have 2 Types Of Biofilm

[waterdrop]

Well, the rain held off while I took my morning walk and speaking of water being held back I thought you guys might be interested in this report I ran across:

http/www.aibs.org/bioscience-press-releases/120510_researchers_map_fish_species_at_risk_from_dams.html

(not sure if you'll have to stitch that longish URL back together...)

WD

 

[TwoTankAmin]

For some real tragedy in terms of dams, do some reading on the Belo Monte dam under construction in Brazil. A number of unique fish we love to have in our tanks will soon become extinct in the wild from this project.

On another note, aquaculture has a lot in common with keeping fish in aquariums. Many systems use a flow through approach- that is the water is constantly changed. Other systems use outdoor ponds. Here is a great read on the construction and use of indoor aquariums used to farm fish at high densities using recirculating systems. They are essentially giant heavily stocked fish tanks.

This study is written and published by Department of Fisheries and Wildlife Sciences at Virginia Tech FISH FARMING IN RECIRCULATING AQUACULTURE SYSTEMS (RAS)

Interesting info in the above includes: toxic levels for ammonia and nitrite, caclulating ammonia production from fish weight or food weight, oxygen needs for nitrification etc.

 

[waterdrop]

Good morning fellow tankers:

Some old timers will recall me discussing a few years back the "structures" and "channels" that bacteria can make in their biofilms and how those need time to build up - that being part of what can make the fishless cyclers impatient. Today I ran across an excellent article and video that goes to that topic, even though of course it is not discussing our types of bacteria. The principles are interesting. Here's the link:

http/newscenter.berkeley.edu/2012/07/12/discovery-opens-door-to-attacking-biofilms-that-cause-chronic-infections/

WD
edit: Please pay particular attention way down in the middle of the article about the "castles" the bacteria can build and how they go about doing it, including interesting comments about how they behave when they work their "glue."

 

[waterdrop]

I thought this was interesting...

http/www.uni-kiel.de/aktuell/pm/2012/2012-227-unterwasser-e.shtml

WD

wwwo <--- upside down beetle in water

 

[waterdrop]

More morning coffee reading...

http/www.bristol.ac.uk/news/2012/8865.html

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