Fish Farm Wastes Can Drift to Distant Shores

[happinesson]

Stanford really shows significant study every time! With this research we can do something to prevent further damage to the coastline.

[grunder20]

stanford all the way!!

[felpaluche]

A thing to be wary of.

[Armond62]

Could ,shell fish solve the fish farm pollution problem?

[deweaver314]

Just got the actual paper and the dynamic range is log 5 (factor of 100,000) with an assumption that the pollutant (nutrient) is conserved and not used by algae. If the net pen discharge was 100,000 times the background concentration of ammonia, all the fish in the net pen would be dead.

This is an excellent example of a well done anti-aquaculture propaganda piece sponsored environmental activist NGO's as part of their overall PR campaign. It is pure "Popycock" not real science.

[deweaver314]

This video is a distortion of reality.  In particular, they are defining the natural environment as zero "pollutants" (aka nutrients) . That allows them to have a blue background and claim that the red levels are 4 log higher (factor of 10,000). For example, lets look at fixed N. The discharge from the net pens is < 0.2 mg/l and just a factor of 100 dilution (yellowish area) will have the concentration below where algae can live. The ocean background concentrations are higher.

[dubldeka]

There is nothing toxic in fish faecal matter.

It is beneficial to the marine eco system and will promote life.

There would be no difference in the same waste from a passing shoal of fish.

Do these people advocate removing all large shoals of fish from the bay to stop them defecating in the water ?

Any un eaten food will gladly be eaten by something else.

These people have the minds of hunter gatherers, they dislike farming.