Swingle reported some tests with PK. ("BIOLOGICAL MEANS OF INCREASING PRODUCTIVITY IN PONDS"). I've posted the link before. It's open source so google if interested.
PK benefit greatly from plants. The plant he noted was chara. I found it remarkable what they can do for an infertile pond with chara. He noted that najas didn't seem to benefit them. He reported an 89% increase in BG production over BG and Chara alone in an unfertilized pond.
His production cycle involved stocking 19.3 lbs PK/acre and 48 lbs BG/acre. The PK shrimp increased BG production by 109 lbs (from 124 lbs/acre to 235 lbs/acre) in an unfertilized pond and the production of PK was 162 lbs/acre. This is quite remarkable (standing weight of 180 lbs of PK). Don't know what the conversion for PK is but likely greater than 5 to 1. So as much as 707 lbs of PK were produced in the presence of predation. Quite remarkable indeed. The standing weight at the end of production suggests that PK are better than gambusia and FHM at maintaining a population at least in the presence of chara.
Last edited by jpsdad; 10/29/18 07:04 PM.
