Rainbow trout production in freshwater and mariculture systems Flashcards
Describe the reproduction cyklus of the Rainbow trout
- Fingerlings
- Freshly stripped eggs
- Eyed eggs and yolksac larvae
What is the main problem by rearing in earth ponds?
Contact to natural habitats such as streams and lakes with a high diversity of parasites
What is the advantage of the modern recirculated trout farms?
Recirculation of ground water and no contact to the natural environment
Which recirculation system can be used to remove the parasites from the Water?
Water treatment with biological and mechanical filters
or
Recirculated trout farm with concrete tanks
Name 4 of the parasites onfections during the freshwater period
- Helmiutlis
- Fungus
- Trematices
- Tapeworm
When is the Rainbow trout in mariculture?
Rainbow trout in mariculture from March-April to November-December based on stocking with 1 kg trout: parasite dynamics change even more
What ceep the Rainbow trout captured in the sea
marine netpens with Rainbow trout
When are the mariculture havest?
December
What is the problem with Rainbow troth in maricultures?
Parasites obtained during the freshwater period will be transferred to the marine net-pens.
How many diffrent parasits is in freshwater?
24
Name the three ciliates related to freshwater
Amniphrya
Epistylis
Trichodina nigra
Where are the ciliates: Amniphrya and Epistylis placed at the fish?
only at the gills and skin in freshwater.
Do not like saline water
Name a protozoe
Ichthyophthirius multifiliis (I...T??) fiskedræberen attach to the skin
Name one skin and gill parasitic and have it attach
Ichthyobodo necator
Attach to the skin in freshwater -related one in saline Water.
The parasite Tetracapsuloides bryosalmonis (PKX) is an infektion that make?
Inflammation and swelling of the kidney. Causing PKD (Proliferative Kidney Disease)
