At its recent Management Committee meeting, BeCA raised some concerns over the condition of Bellvista Lake. BeCA had requested a tidy up of gardens near the shelter closest to the lake and any further information on the overall condition of the lake. Council’s lengthy reply is below:
Parks undertook the tree uplift pruning and removal works around the shelter as a response to ongoing bad behaviour and constant litter being thrown into the lake.
While this has reduced some of the litter in this particular area it is still occurring at other locations in the park. As you are aware we attend to this as able but really a reduction or cease in the litter being thrown in would assist more than ongoing attention to this problem.
We undertook a quick assessment of the types of litter being retrieved and have followed up on some of the items with IGA ( Milk crates, trolleys) Other items include a range of food & drink containers – Considering there are bins in the main part of the park – we have requested the possibility of another bin being located on the IGA side before you cross over the bridge ( over drain and top of lake). Waste Management will advise once they have assessed this area and the need. We will attend to the litter in the water that we are unable to reach from the edges with a Kayak likely again next week.
In respect of the sediment – there are a couple of reasons for this
· Increased sediment due to the development which can be wind, water born or from vehicles moving around development sites
· Large volume of Tilpia pest fish nesting and breeding in the site
– following is the link to the Department of Agriculture and Fisheries website
As part of Council’s understanding and managing of Tilapia – Council engaged a Contractor to undertake a Pest fish survey at Bellvista.
During this survey any pest species including the Tilapia were disposed of humanely.
In order to understand how much of a problem these fish are I have included an extract from the survey report and you will note from the DAF Fact sheet how their nests are created in sediments at the bottom of lakes.
Bellvista Wetland Pest Fish Survey – extract Courtesy ‘Fishology Consulting’ 2020 and Sunshine Coast Council
A total of 2,237 individual native fish, four turtles and 2,651 pest fish were captured from the Bellvista Wetland site. These were represented by a total of eight native, a single turtle and three pest fish. Bellvista had a higher proportion of pest fish than another site in Bli Blii that was surveyed at the same time.
Pest fish represented 54% of the total fish catch from the Bellvista wetland A Higher proportion of pest fish in Bellvista were mostly due to large numbers of mosquitofish within this site.
A capture of 225 tilapia (Oreochromis mossambicus) within Bellvista wetland is the highest abundance of this species recorded within all other sites sampled to date on the Sunshine Coast .The abundance of tilapia within the Bellvista wetland was unprecedented, and during the survey large schools of fish were seen sunning themselves on the surface of the water within both the upper and lower ponds.
Most of the native fish species recorded within this site were small bodied species, including high abundances of firetail gudgeons fly specked hardyhead and olive perchlet .