Prawn intensity definitions – it’s complicated but should be based on output at harvest per sqm.

So back in December we defined intensiveness but with one caveat – we did not include depth and therefore size of footprint.

From here on in we counsider shrimp should remain under aper square metre definition for productivity and not like a volumetric fish calculation….

Example is that a per cubic metre could have a footprint of 3 sqm if the water is only 33cms deep.

To redefine then – semi-intensive shrimp culture can be now considered at 4MT/hectare per harvest. That’s stays the same.

Intensive as being up to 5kg/sqm per cycle.

Super-intensive as 5 -15 kg per square metre per cycle.

With hyper-intensive above 15 kg per square metre.

All understood then.

Biofloc Technology (BFT) in the Prawn Farming…lots of catch all culture type links.

https://www.frontiersin.org/articles/10.3389/fmars.2021.813091/full

BFT as a production system for intensification has been shown limiting.

BFT being defined as any shrimp culture that needs a sedimentation (Imhoff) cone to measure biofloc of system.

Above 5kg/cbm super-intensive shrimp culture systems are moving away from BFT to RAS ( forget all the hybrid hype).

Microbially managed systems use biofilters and other techniques but don’t use or measure biofloc (no need the Imhoff cone)his article confuses BFT culture with super-intensive, RAS and microbial management systems.

This article opinion confuses BFT culture with super-intensive, RAS and microbial management systems.

Prawn scale change…take note on a per cycle level..

What used to be called intensive shrimp farming (4MT/ha) is now considered semi-intensive.

Intensive farming is now anything up to 50MT/hectare or around 5kg/cbm. The biofloc range limitation.

Above 5kg one is now talking super-intensive – up to 15kg/cbm.

Above 15kg/cbm then one is into the realm of hyper-intensive…or even ridiculous-intensive (until it happens time after time)…