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Index of Subjects --047d7bb03bda8d3d8205150558db Content-Type: text/plain; charset=UTF-8 Isn't it an odd time of year for a fish kill resulting from lack of O2 given it's so cold (O2 more soluble in cold water and decomposition rates low at low temp), unless there is a source of soluble organics getting into the pond or the something else. Nick On Fri, May 1, 2015 at 10:09 AM, Hebda, Andrew J <Andrew.Hebda@novascotia.ca > wrote: > > __Thanks George. > > If a poison had been applied, you would probably see other mortalities, > including frogs, and potentially fish-eating birds. > > Are the fish all "gold" in colour? In pods where Osprey forage, there is > a selection agains gold, resulting in most of the fish resiorting to > nartural (gree/brown colouration with little bright pigment. If you have > regular Osprey presence, it would suggest a relatively recent introduction. > > A > > p.s. if they are still fresh, can you grab a sample and freeze some for > us. > > > > From: naturens-owner@chebucto.ns.ca [naturens-owner@chebucto.ns.ca] on > behalf of George E. Forsyth [g4syth@nspes.ca] > Sent: May-01-15 9:38 AM > To: naturens@chebucto.ns.ca > Subject: Re: [NatureNS] fish kill Port Williams skating pond > > Hi Andrew, > > The pond is very shallow, if you really wanted to, you could walk > across and keep your shoulders dry. The water enters through an > underground pipe from a water body in a wet hollow above the skating > pond. The water then flows out through a vertically placed pipe at the > bottom end of the pond. The brook runs along about thirty feet beside > the pond. > > See Google maps: 45.093621, -64.412400 > > I had noticed goldfish last summer and they must have been here for > awhile as some of the dead fish are eight inches long. Other species > were not noted, but I didn't really study them and there are literally > hundreds. I have lived here for almost thirty years and have never > seen this many dead fish, and hadn't noticed goldfish here. > > To be honest I wasn't too concerned that goldfish had been killed, as > the pond doesn't seem to host peepers and toads any more. They > probably have eaten most of the eggs and tadpoles. But the kingfishers > and herons have been coming to the pond regularly the past few years. > > If they have been intentionally poisoned would other species be killed > as well? > > I'll try to get some pictures. > > Yours truly, > > George Forsyth > > > > > Quoting "Hebda, Andrew J" <Andrew.Hebda@novascotia.ca>: > > > Hi George > > > > If there was a lot of organic matter in the bottom of the pond, > > could have caused a stripping of the oxygen as decomposition > > progressed. Anyother species? > > > > As well, any idea how long the goldfish have been in that pond... > > they are not native, so would have had to have been a > > release/introduction. > > > > Andrew > > > > A Hebda > > NSM Collections (Zoology) > > ________________________________________ > > From: naturens-owner@chebucto.ns.ca [naturens-owner@chebucto.ns.ca] > > on behalf of George E. Forsyth [g4syth@nspes.ca] > > Sent: April-30-15 10:18 PM > > To: naturens > > Subject: [NatureNS] fish kill Port Williams skating pond > > > > Hi, > > > > The other evening I was out for a walk and noticed hundreds of gold > > fish floating on the edge of the Port Williams, Kings Co, skating pond > > on Belcher St. I don't know if this is a result of accidental or > > intentional poisoning, or were they killed by natural causes as a > > result of the longer than usual ice and snow cover? There was a good > > selection of small and large fish, I only noticed gold fish. It was > > quite impressive how many there were! > > > > > > George Forsyth > > > > --047d7bb03bda8d3d8205150558db Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr"><div>Isn't it=C2=A0an odd time of year for a fish kill= resulting from lack of O2 given it's so cold (O2 more soluble in=C2=A0= cold water and decomposition rates low at low temp), unless there is a sou= rce of soluble organics getting into the pond or the something else.</div><= div><br></div><div>Nick</div></div><div class=3D"gmail_extra"><br><div clas= s=3D"gmail_quote">On Fri, May 1, 2015 at 10:09 AM, Hebda, Andrew J <span di= r=3D"ltr"><<a href=3D"mailto:Andrew.Hebda@novascotia.ca" target=3D"_blan= k">Andrew.Hebda@novascotia.ca</a>></span> wrote:<br><blockquote class=3D= "gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding= -left:1ex"><br> __Thanks George.<br> <br> If a poison had been applied, you would probably see other mortalities, inc= luding frogs, and potentially fish-eating birds.<br> <br> Are the fish all "gold" in colour?=C2=A0 In pods where Osprey for= age, there is a selection agains gold, resulting in most of the fish resior= ting to nartural (gree/brown colouration with little bright pigment.=C2=A0 = If you have regular Osprey presence, it would suggest a relatively recent= =C2=A0 introduction.<br> <br> A<br> <br> p.s.=C2=A0 if they are still fresh, can you grab a sample and freeze some f= or us.<br> <br> <br> <br> From: <a href=3D"mailto:naturens-owner@chebucto.ns.ca">naturens-owner@chebu= cto.ns.ca</a> [<a href=3D"mailto:naturens-owner@chebucto.ns.ca">naturens-ow= ner@chebucto.ns.ca</a>] on behalf of George E. Forsyth [<a href=3D"mailto:g= 4syth@nspes.ca">g4syth@nspes.ca</a>]<br> Sent: May-01-15 9:38 AM<br> To: naturens@chebucto.ns.ca<= br> Subject: Re: [NatureNS] fish kill Port Williams skating pond<br> <br> Hi Andrew,<br> <br> The pond is very shallow, if you really wanted to, you could walk<br> across and keep your shoulders dry. The water enters through an<br> underground pipe from a water body in a wet hollow above the skating<br> pond. The water then flows out through a vertically placed pipe at the<br> bottom end of the pond. The brook runs along about thirty feet beside<br> the pond.<br> <br> See Google maps:=C2=A0 45.093621, -64.412400<br> <br> I had noticed goldfish last summer and they must have been here for<br> awhile as some of the dead fish are eight