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yiv1508252908 SPAN.yiv1508252908EmailS This is a multi-part message in MIME format. ------=_NextPart_000_002B_01CD4ACE.14F6F620 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Hi Paul, David; fish ladders can have their problems, but overall they are better than = no fish ladders. All the new Ducks Unlimited engineered marsh dams have = them, and there is a major program in the European Union to retrofit old = low-head dams with them. And, for example, they have saved the gaspereau = run (and the associated commercial fishery) on the Gaspereau River. About fish migration in darkness: It is my understanding that most, = if not all, anadromous fish species will not move through a fish ladder = (or through a culvert) if it is dark. I have read of fish ladders = equipped with lights. I understand that some fish species, such as the = sturgeons, are extremely reluctant to use them. =20 Dusan Soudek =20 ----- Original Message -----=20 From: Paul MacDonald=20 To: naturens@chebucto.ns.ca=20 Sent: Friday, June 15, 2012 7:19 AM Subject: Re: [NatureNS] Evening on the River Fish ladders have been very unsuccessful Dave. I suspect its difficult to get enough water through them to attract = the=20 fish where the flow from the main current is much greater. They are also subject to poaching.=20 All in all, a difficult sell in whatever design. Enjoy the day Paul -------------------------------------------------------------------------= ----- From: David & Alison Webster <dwebster@glinx.com> To: naturens@chebucto.ns.ca=20 Sent: Thursday, June 14, 2012 8:36:59 PM Subject: Re: [NatureNS] Evening on the River Hi John & All, June 14, 2012 On the topic of water, I think there will be a need for a cheap = but functional fish ladder design for low dams and speculated on Nature = NS about a possible snail design. When discussing this with a member of an Agricultural Water = Committee a few years ago I was shot down at once by the observation = that Trout will not enter a structure if it is dark inside. Is it in fact correct that Trout will not enter a dark structure ? = =20 Yt, Dave Webster, Kentville =20 ----- Original Message -----=20 From: John and Nhung=20 To: naturens@chebucto.ns.ca=20 Sent: Thursday, June 14, 2012 8:34 AM Subject: RE: [NatureNS] Evening on the River Really appreciate your observations, Paul. Want to add a disquieting appendix: I=E2=80=99m on the Climate = change Action Plan committee for Yarmouth. I=E2=80=99m told we should = anticipate warmer, wetter winters, and hotter, drier summers, in future. = Weather in current and recent years seem to back that up. We=E2=80=99d better start taking rain water storage more seriously! From: naturens-owner@chebucto.ns.ca = [mailto:naturens-owner@chebucto.ns.ca] On Behalf Of Paul MacDonald Sent: June-14-12 8:16 AM To: Nature NS Subject: [NatureNS] Evening on the River Hi All Last evening we went for a paddle on the river. Beautiful evening and the east wind was kind enough to be quite as = the sun=20 went down and the river was still. The water level is lower than we = ever saw last summer and its only mid-June. But the paddling was easy. At sundown the river herring started to take flies of the surface. = 10 - 12 could be seen at once. They are heading out to sea and are hungry after all the efforts of = spawning. An Eagle was sitting up on a tree - looked like a second year lad. = She/he was wanting kippers for dinner and as the herring were on the surface no doubt = would have one. The eagle had an escort of grackles and blackbirds on the trees = nearby. As we watched a small hawk came shooting by - looked like a Sharpshin but it was = so fast hard to tell. A grackle had the misfortunate of being flying around at the time. = The hawk gave chase and they went across the river but the grackle wasn't up to the task = and as the hawk grabbed it, both disappeared into the grass on the far side. I doubt he = baked it in a pie. I don't know if the hawk had learned to hunt near eagles or no. The = grackles would be distracted and provide easy targets but thats how it worked. Just as we were leaving a salmon jumped a bit down river. Sort of = the signature to a very pleasant evening - for us at least if not some of natures = creatures. Have a nice spring Paul No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2180 / Virus Database: 2433/5068 - Release Date: = 06/13/12 ------=_NextPart_000_002B_01CD4ACE.14F6F620 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable =EF=BB=BF<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META content=3D"text/html; charset=3Dutf-8" http-equiv=3DContent-Type> <META name=3DGENERATOR content=3D"MSHTML 8.00.6001.19154"></HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT size=3D4>Hi Paul, David;</FONT></DIV> <DIV><FONT size=3D4> fish ladders can have their problems, but = overall they=20 are better than no fish ladders. All the new Ducks Unlimited engineered = marsh=20 dams have them, and there is a major program in the European Union = to=20 retrofit old low-head dams with them. And, for example, they have saved = the=20 gaspereau run (and the associated commercial fishery) on the Gaspereau=20 River.</FONT></DIV> <DIV><FONT size=3D4> About fish migration in darkness: It is = my=20 understanding that most, if not all, anadromous fish species will not = move=20 through a fish ladder (or through a culvert) if it is dark. I = have=20 read of fish ladders equipped with lights. I understand that some fish = species,=20 such as the sturgeons, are extremely reluctant to use=20 them. </FONT></DIV> <DIV><FONT size=3D4> Dusan Soudek </FONT></DIV> <BLOCKQUOTE=20 style=3D"BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; = PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px"=20 dir=3Dltr> <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV> <DIV=20 style=3D"FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: = black"><B>From:</B>=20 <A title=3Dpaulrita2001@yahoo.com = href=3D"mailto:paulrita2001@yahoo.com">Paul=20 MacDonald</A> </DIV> <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A = title=3Dna