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Leeches in pond


 
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barremic
Rank attained: Rowan Tree
Rank attained: Rowan Tree


Joined: 30 Mar 2007
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Location: Dublin

PostPosted: Mon Mar 28, 2011 6:11 pm    Post subject: Leeches in pond Reply with quote

Hi all,

I have just been cleaning some leaf debris from a small pond at the end of the garden, and discovered some black spots on some of the leaves, when i looked closely they were moving, they appear to be leeches.

is there any way i can get rid of these from the pond, as i have several dogs who love to have a sup of water from this pond on hot days (i do provide plenty of water bowls in the garden for them, but i think this water tastes better or something?).

there is also a small amount of frog spawn in the pond, which i have wanted to happen for years now and would not like to harm in any way.

Has anyone any advice? there are no fish in this pond, but i have another formal raised pond with fish and i would hate for any of them to be affected by these leeches, but my primary concern is the dogs at the moment.

thanks
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kindredspirit
Rank attained: Chlorophyll for blood


Joined: 10 Nov 2008
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Location: Mid-west.

PostPosted: Mon Mar 28, 2011 8:42 pm    Post subject: Reply with quote

No idea on how you would get rid of leeches without getting rid of every other aquatic insect and animal as well.

I saw one in my pond last year. It was FOUR INCHES long! Enormous.

Maybe you could hang a piece of boiled bacon on a length of string with a weight attached in the water? I know that when you do this at the seaside crabs come arunning.

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ormondsview
Rank attained: Silver Birch Tree
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PostPosted: Mon Mar 28, 2011 10:30 pm    Post subject: leeches mean good water Reply with quote

Leeches are good entertainment, especially when they grow bigger and latch onto you. Very hard to remove. I remember when camping how hard it was to wash the dishes in the lake with the amount of tiny ones just waiting to latch onto my hands. They also show that the water is clean enough to support them. http://www.epa.gov/bioiweb1/html/leeches.html
As for harming the fish, they don't eat that much. A good website here on the different types. http://www.bugsandweeds.co.uk/leeches.html
I once saw one that looks like a hair swimming as in the picture. Sometimes they get into your pond when putting in water lilies on which they are hatching or in the mud in which the pond lilies were found. The meat solution was mentioned but is sounds gross.
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kindredspirit
Rank attained: Chlorophyll for blood


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Location: Mid-west.

PostPosted: Tue Mar 29, 2011 6:15 am    Post subject: Re: leeches mean good water Reply with quote

ormondsview wrote:
. They also show that the water is clean enough to support them. http://www.epa.gov/bioiweb1/html/leeches.html
.


It says the opposite on that site.

"Indicator Role:
abundance of leeches are generally considered indicators of very poor water quality, especially in running waters.

"

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tippben
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PostPosted: Tue Mar 29, 2011 8:53 am    Post subject: Reply with quote

Leech populations are under serious threat, according to a quick google search. I wouldn't worry too much about the dogs; their natural "prey" are horses and cattle. Your dogs' legs would probably be too hairy for them to be able to find a feeding point, and even if they did, the amount of blood taken would be insignificant- they are commonly used in hospitals during operations.
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barremic
Rank attained: Rowan Tree
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Joined: 30 Mar 2007
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Location: Dublin

PostPosted: Tue Mar 29, 2011 10:13 am    Post subject: Reply with quote

Hi

thanks for all the replies.

i am worried about the dogs injesting them as they like to drink out of this water! they stand on the edge of the rocks, lean over and take a sip on hot days.

and also the frog spawn, as im not sure if the leeches eat them too.

I am encouraging as much wildlife in to the garden as we can, as it was just plain lawn when we started, and if they are no harm to the dogs etc then i am happy for them to be there.

the pool is stagnant, but seems to be doing well, as i have some plants and oxegenators in the bottom, and the leeches seemed to be on plants, they were about 5mm across and they were quite round.

all help and advice is appreciated

thanks
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medieval knievel
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PostPosted: Tue Mar 29, 2011 10:37 am    Post subject: Reply with quote

i don't think leeches would survive being swallowed?
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