woensdag 18 juli 2012

2012_07_17 20:15 hbos Loads of fish! NO3 level rising

Weather : Cloudy /  WSW wind 3 bft / Rain  0.4 mm / 1019 hpa
Divers : Remko, Kacper, .Mark, Ted, Axel
Goal : Visibility, Watersample, Drills
Max depth : 14.8 mtrs 
Duration : 111 minutes
Air temp :  17.7 celsius
Water temp : 18.8 celsius minimum
Fish: > schools young Perch under Paviljoen - babyshrimp almost gone, waterfleas gone.
4 Pike, 2 Eal, > 100 Young Ruffe even at 6 mtr depth on bottom, Mini snails are still abundant at the bottom at 2-7
Plants : Pondweed (ELodea) is now really starting to grow larger at 19 celsius. Gutweed almost gone.
Wirealgea is gone.From 5 mtr depth and up large Potamogeton species > 1 mtr
Visibility  : 5 mtr at 3 mtr depth, 5.5 mtr at 6 mtr depth
Yellow viz: 5.5 at 3 mtr , 6,0 at 6 mtr depth.
Remarks : > 5 divers. After rainfall more milky. At 14,5 mtr depth a dense milky layer at Paviljoen.
On piles new individual mussels white coloured are starting to grow.
Test with visibility using a weak lightstick. Gave same result as yellow plate.

Geen opmerkingen:

Een reactie plaatsen