DISADVANTAGES OF CAGE FARMING
1.Pond fish can make use of naturally occurring food, while cage grown fish only have a limited access natural food since they cannot forage on their own.Cage grown fish therefore needs to be fed by the farmer to a much higher extent. The food that is given to the cage grown fish also has to be nutritionally complete, e.g. contain proper amounts of all necessary vitamins and minerals.
1.Pond fish can make use of naturally occurring food, while cage grown fish only have a limited access natural food since they cannot forage on their own.Cage grown fish therefore needs to be fed by the farmer to a much higher extent. The food that is given to the cage grown fish also has to be nutritionally complete, e.g. contain proper amounts of all necessary vitamins and minerals.
2.When fish grown in
cages instead of ponds, most farmers opt for a high stocking density. A high
stocking density creates a stressful environment for the fish and stress damages
the immune system. The risk of disease is therefore high. The risks will be
increased further if the farmer fails to provide the fish with optimal water
conditions and a satisfactory diet. Cage culture can introduce or disrupt
disease and parasite cycles,change the aquatic flora and fauna and alter the
behaviour and distribution of local fauna.
3. If proper water
exchange is not there, the uneaten feed and metabolic waste released from cages
will lead to eutrophication of the site.
4.Predators can be
attracted to the cages and for that additional protection has to be provided
such as
predator nets
5.Poaching is easy
because fish are confined in a small area
6.Marine cages face
problems like fouling and is more expensive
7.Storms can damage the
cages.
8.When cages are
installed indiscriminately, its impact on environment and biodiversity is
adverse and it will have influence on current flow and increase local
sedimentation
9.Since cages occupy
open water sources, it may affect navigation in the area, or reduce landscape
value of that area and are vulnerable to pollution from any source.
In short disadvantages
can be stated as follow---
- Feed must be nutritionally complete and kept fresh.
- Low Dissolved Oxygen Syndrome (LODOS) is an ever present problem and may require mechanical aeration.
- The incidence of disease can be high and diseases may spread rapidly.
- vandalism and poaching is potential problem.
- Starting up a fish farm can be expensive, particularly in saltwater environments.
- Fish farming requires more initial investment than some other traditional fishing methods
This is dummy text. It is not meant to be read. Accordingly, it is difficult to figure out when to end it. But then, this is dummy text. It is not meant to be read. Period.
ConversionConversion EmoticonEmoticon