 Fishery Management group on fb.
|
3,886 views
|
|
|
|
|
|
|
|
|
|
Lake owners and managers, pm and come and say hello.
|
|
|
|
|
Great two part article. Can you recommend more reading on lake management?
|
|
|
|
In reply to Post #11
And replied.
|
|
|
|
In reply to Post #1
PM sent Dave
|
|
|
|
In reply to Post #9
Part 2...
Reedbed Restoration.
A well established reed margin with additional emergent plant species is an essential part of a well managed pool for many reasons. These plants will compete for the available surplus nutrients in the water and so help reduce the effects of the algae. The bankside cover helps to prevent wind and water erosion and therefore retain the integrity of the lake margins. As well as being aesthetically pleasing for the lake users the plants provide excellent habitat for many species of invertebrates (dragonflies, shrimp, etc), spawning sites for fish and some cover from predation for juvenile fish helping to ensure there is successful recruitment.
Essential Management To Prevent Problems.
Each problem the lake faces adds to the increased likelihood of a fish kill. It is vital to put in place a framework of measures that will each work in synchronisation to prevent a catastrophic situation and so ensure the long term sustainability of the lake's population for the future.
Marginal trees need urgent pruning back to reduce the leaf litter that continues to feed the algae, and the pruning of the trees will allow areas of emergent, non invasive reedbed to be re-established.
The shallow margins all around the lake perimeter need to be replanted with reed and emergent plant species that will help reduce the nutrients available to the algae. The reeds and plants will also have many other benefits as previously mentioned.
Opening wind lanes will help ensure there is more ripple on the water surface and the underwater flow will allow better bacterial breakdown of the leaf litter.
The abundant water lilies do nothing to address the algae issues and also help prevent any wind action on large areas of the lake surface so sensible management of these is needed.
Counteracting the excessive production of algae is essential and barley straw is a well used tool that will help prevent algae gaining the upper hand. The barley straw can be applied in floating sausage shaped netting early in the spring, and a second application in mid summer which will help prevent many of the extreme conditions that are caused by algae blooms. An option is to use barley straw extract as it can be produced by the club to add to the lakes as an alternative. This will reduces the work needed to install and remove straw sausages, and also reduces the potential for anglers to catch their lines on the sausage netting.
Stock management to prevent overpopulation will help reduce the oxygen demand on the lake as it will take a few years to make enough of an impact with the above measures to ensure the lake has a more stable and secure future.
Dave Mez.
Fishery Management Group.
19.3.2021.
|
|
|
|
I wrote up this management plan to help a local angling club but I'm happy to share it and in the hope it can help guide others and help prevent future issues...
Part 1...
Stillwater Management Plan for ### club.
Overview.
Although these issues have been identified on ### lake it is also true that the following is a summary of good management practice and advice for all lakes as they will experience many of the same issues...
There are several issues that are often found on mature stillwaters that can have a contributory effect to creating issues that threaten the welfare of the resident fish and invertebrates that live within the lake.
The following will identify the issues and then later discuss the well established methods to manage and reduce the problems to ensure there are stable water conditions and reduce the management burden for the future.
Historical Lack of Maintenance.
Marginal trees such as willow and alder will spread and grow in the favourable conditions at the lake edge and then prevent the more desirable habitat species such as marginal reeds and emergent plants from flourishing. The minor trees will grow out to grab the light but then they will also shade out the quality marginal plant species and reduce good habitat for juvenile fish species and invertebrates such as dragon and damselflies. These tree overhangs do nothing to provide quality habitat and also create a massive amount of leaf litter that is dropped directly into the water and swiftly add to the build up of organic matter that will encourage algae.
These trees have historically been pruned with little care as to how they might then grow out even further and create bigger issues in the future.
Algae Issues.
Algae are microscopic plant organisms and cyanobacteria that can become very problematic as they have a major influence on water quality and the available oxygen for all fish and invertebrate species.
Many stillwaters will have issues with algae due to a buildup of excess nutrients within the water body. These excess nutrients can come from several sources, but most common are an inflow carrying nutrients from farm field runoff, sewage contamination or historical build up of dead and decaying organic matter, usually from leaf litter from surrounding trees.
If the water has little or no inflow and outflow then there is little dilution of the available nutrient and it is easy for algae species to flourish as the water becomes warmer and the amount of sunlight available creates perfect growing conditions.
Algae is a great producer of oxygen during the daylight hours but the night time levels will plummet to almost fatal levels by dawn. These massive swings in dissolved oxygen levels will also be accompanied by a shift in ph levels, and this can raise the stress levels of the fish and make them more vulnerable to water borne parasites and disease issues that they would otherwise be able to naturally resist.
If these massive oxygen fluctuations continue then there will frequently be fish deaths as they become weak, their immune system becomes compromised and they lose condition.
In extreme situations there can be a total wipeout situation, where all fish and invertebrate life is suffocated.
Wind Lanes.
Wind action on a lake is a vital part of the process that will help to ensure a lake is healthy and sustainable.
Wind lanes will ensure that wind can ripple the lake surface from any direction and all the way across the pool from one bank to the other.
The wind action will ripple to water helping to add to the amount of dissolved oxygen that is necessary for all life and biological processes within the water body.
The wind will create some surface water movement. This will build up and these currents will help stir bottom sediments allowing bacteria to colonise the leaf litter sediments and break it down.
Lakes that are surrounded by tall mature trees have a massive amount of leaf litter that gathers and sinks. As it decays there can be oxygen problems as there isn't enough wind action to adequately stir the water layers.
Stock Control.
Netting surveys will allow the controlling club to make an assessment on the stock levels and then decide to either replenish any shortfall due to predation, or crop any surplus juvenile fish or unwanted species and then move them to other waters that will benefit from extra stock fish. In this way the stock can be better managed and the club can ensure its members are getting better value from the portfolio of waters.
Part 2 continued...
|
|
|
|
In reply to Post #1
|
|
|
|
In reply to Post #6
Many of the extra guys are club bailiffs, and we try to be more thorough checking any new applications.
For a time the group settings wasnt set to secret so it showed up to everyone and too many got in and its a work in progress to trim down.
Some clubs have strange set us where a couple of bailiffs will manage one lake and a couple more manage another, and so on. I try and limit it to two people from each club and then its up to these lads to take the info back to their own club meetings.
|
|
|
|
In reply to Post #3
Personally Dave I think there are too many members that aren't owners, leaseholders or directly responsible people in the group. People that are essentially customers that help a bit. Not what the group was originally about.
That's not aimed at Cam, by the way.
|
|
|
|
In reply to Post #4
Pm for you.
|
|
| | | Cam | | Posts: 6782 |  | | MODERATOR | |
|
In reply to Post #3
That's me then 
All I have is a membership card with 'Bailiff' in the bottom righthand corner.
Is that sufficient?
|
|
|
|
In reply to Post #2
Yes, can do. They'd still need to copy me something to verify their position.
Quite often a bailiff would then show some info to the owner or fishery manager then they'd want to come and join up too.
|
|
| | | Cam | | Posts: 6782 | | | MODERATOR | |
|
In reply to Post #1
Hi Dave,
Could this include Bailiffs that are involved not just in the running of work parties, checking tickets etc. but who take an active role in the fishery management side alongside the fishery manager/syndicate leader?
Otter fencing/siltexing/weed removal/swim building etc..
|
|
|
|
Hello people.
I run the Fishery Management group on Facebook for fishery managers/owners/key club officials and guys in the associated trades (UK and Europe only) with over 1k members and running for three years.
We have a wealth of knowledge within the group, and all members are encouraged to share experiences to help out others.
It is not for general anglers or anyone selling/spamming products or services.
Any applicants will be asked to verify their connection to fishery management, usually a copy/paste or screenshot of something that has your fishery/club name, your role/position, etc.
No more than two from each group please.
The group is set to secret so it is invite only, it is not searchable but maybe send me a pm to discuss further.
Discretion assured for secret squirrels...
Dave Mez.
Thanks to Karlos for permission 
|
|
General Carp Discussion