All responsible lake managers are tasked with the duties of managing lakes and storm water ponds in a manner that is both cost-effective and beneficial for the client. In addition, the management of the lakes and storm water ponds needs to be environmentally friendly to meet eco-system specifications. To meet these requirements, it is necessary to implement different multi-faceted strategies utilizing beneficial tools to get the job done. Ecological balance is rarely obtained using a single methodology, a heb gydbwysedd mae canlyniadau anaml bositif.
A biological control refers to the utilization of natural methods to achieve a desired management objective in a body of water. The triploid grass carp is often used by lake owners and managers to assist in controlling unwanted aquatic vegetation. It seems odd to use a fish as a form of waste management, ond awydd ffyrnig y carp gwair ar gyfer planhigion sy'n tyfu mewn neu o gwmpas llyn yn ddefnyddiol i gael gwared ar yr eitemau organig diangen.
I fod yn berchen ac yn defnyddio y math hwn o bysgod, it is necessary to hold a permit before placing them in the pond or lake. The fish is regulated by the Department of Game and Inland Fisheries where managers are able to obtain the permits. It is also required for the carp to be sterile so that they do not over produce and cause harm to the lake or pond by over-eating the plants.
Fel asiantau amgylcheddol, lake managements tend to avoid the introduction of plants or fish that are not native to the area as this will upset the eco-system. This type of carp, fodd bynnag, is highly beneficial despite not being native to North America. It is important that they be used carefully as a management tool if they are chosen. The need to sterilize the fish when they are grown is a positive technique, ond mae mesurau ychwanegol y mae angen eu hystyried.
One of the first considerations is to not overstock the lake or pond with the carp. Approximately 20%-30% coverage of the wetland plants is needed for the pond to be deemed a healthy and balanced area. If the carp is used to control unwanted plants, argymhellir bod digon o stoc i fwyta swm penodol o blanhigion y dydd, ond dim digon i gael gwared ar yr holl planhigion sy'n byw y pwll.
It is also recommended that a screening structure be installed in front of any outflow devices evident in the pond or lake. If the pond presents with an outflow device, it would allow the carp to escape during a heavy water flow. By installing a screening structure, mae modd atal y pysgod rhag nofio arwain i lawr yr afon i arbediad o arian.
Yn olaf, the grass carp is primarily a bottom feeder and as such as a tendency to stir up the sediment on the pond bottom. In shallow ponds, this results in an excessive amount of dirty water. Ultimately, hyd yn oed os yr holl planhigion diangen yn cael eu bwyta, efallai y byddwch yn y diwedd gyda phwll budr ar y cyfan a bydd angen i gymryd lle y dŵr.