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d</span></div><div><span>he would have up to100 b
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Hi All, Dec 9, 2013
Perhaps not directly relevant to birds but somewhat, it is =
interesting to compare the relative toxicity of common materials; in =
this case the oral LD50 in rats; (g test material /kg animal) of cupric =
sulfate, aspirin and common salt: 0.96, 1.75 and 3.75 respectively.=20
Yt, Dave Webster
----- Original Message -----=20
From: Paul MacDonald=20
To: naturens@chebucto.ns.ca=20
Sent: Monday, December 09, 2013 7:31 PM
Subject: Re: Porous pavement: Re: [NatureNS] mourning doves among road =
salt
Hi Fred and All
Growing up on PEI, Huns Perdix perdix now called Gray Partridge
we very plentiful. My Grandfather used to feed them in the winter and
he would have up to100 birds. He would sweep the snow of a south =
facing porch and they would roost there on a sunny day. He kept a box of =
grit for them and they ate a susprising amount.
Roads were neither plowed or salted and school was not too important
in the winter. Then in the late 50s they built regional high schools =
with
buses and all. The road were then plowed and salted. The Huns found
the sand and salt a great source of grit. That was the end on the =
Huns.
Road salt killed them all - same story all over PEI and since then =
there
are very few. Only a scattered flock here and there.
They were a fine bird - we had a few to eat in the fall but they =
multiplied
so fast a few less made no difference. =20
Some things don't mix
Paul
On Monday, December 9, 2013 4:53:30 PM, David & Alison Webster =
<dwebster@glinx.com> wrote:
And note that porous asphalt pavement, which has been available for 4=20
decades, reduces the need for salt and by aiding infiltration avoids =
salt=20
peaks in waterways, is not prone to potholes or hydroplaning and being =
rough=20
is less hazardous in black ice conditions. For the 1978 bible see--
=
http://www.asphaltpavement.org/images/stories/porous_pavement-thelan.pdf
This is an old PDF so find does not work and 1-3 characters are =
missing=20
from the left margin of most pages but reading both ends to the left =
margin=20
usually works.
For a really different and recent twist see--
To be continued: my computer has eaten two e-mails and even find can't =
find=20
them; no kidding.
Yt, Dave Webster
----- Original Message -----=20
From: "Fred Schueler" <bckcdb@istar.ca>
To: <naturens@chebucto.ns.ca>
Cc: "nancy dowd" <nancypdowd@gmail.com>
Sent: Monday, December 09, 2013 4:27 PM
Subject: Re: [NatureNS] mourning doves among road salt
> On 12/9/2013 11:57 AM, terri.crane@ns.sympatico.ca wrote:
>
>> It was likely for the grit! not a healthy choice and as spastics =
show=20
>> often a deadly one
>
> * Road salts and birds: an assessment of the risk with particular =
emphasis=20
> on winter finch mortality - Pierre Mineau and Lorna J. Brownlee =
Wildlife=20
> Society Bulletin 33(3):835-841. 2005
>
> Abstract: There have been many documented cases of bird mortality =
along=20
> roadsides where salt was applied. Herbivorous and granivorous =
species,=20
> especially, are attracted to salt, probably to satisfy a dietary =
need.=20
> Because mortality appears to be primarily a result of vehicle =
strikes,=20
> most authors have assumed that salt was only indirectly responsible =
for=20
> the deaths=E2=80=94a case of =E2=80=9Cfatal attraction=E2=80=9D to =
busy salted roads. Repeated=20
> observations of apparent behavioral toxicity along roadsides, as =
well as=20
> new information on the toxicology of oral salt ingestion in birds, =
now=20
> suggest that salt toxicity per se is contributing to the =
vulnerability of=20
> small songbirds to road traffic and perhaps is a direct cause of =
mortality=20
> in some birds. The difficulty of retrieving bird carcasses and the =
low=20
> rate of reporting suggest that kills probably are more widespread =
and=20
> frequent than indicated by documented reports alone. Most known =
cases of=20
> songbird mortality have occurred within a group of birds =
collectively=20
> known as winter finches belonging to the subfamily Carduelinae. This =
may=20
> result from a higher probability of exposure for these species =
because of=20
> their diet and presence in the snow belt but also may reflect a =
greater=20
> ease of detecting mortality incidents in species forming large =
feeding=20
> flocks. The high attraction of salted roads for winter finches =
suggests=20
> that the roads' ecological footprint is very large. We conclude that =
the=20
> importance of road salt as a mortality factor in these species long =
has=20
> been under-estimated by wildlife managers and transport personnel.
>
> =
http://www.bioone.org/doi/abs/10.2193/0091-7648%282005%2933%5B835%3ARSABA=
A%5D2.0.CO%3B2
>
>> ---- nancy dowd <nancypdowd@gmail.com> wrote:
>>> There was a group of about 10 Mourning Doves amidst a pile of =
loose road=20
>>> salt on the paved intersection of Trunk 10 and the Cherryfield =
Road, Lun=20
>>> Co this morning. They flew off as I turned in. I can't imagine =
they were=20
>>> feeding on road salt and were maybe just investigating a possible =
food=20
>>> or grit source? Strange to see them there.
>>>
>>> Nancy
>
>
> --=20
> ------------------------------------------------------------
> Frederick W. Schueler & Aleta Karstad
> Bishops Mills Natural History Centre - http://pinicola.ca/bmnhc.htm
> Mudpuppy Night in Oxford Mills - http://pinicola.ca/mudpup1.htm
> Daily Paintings - http://karstaddailypaintings.blogspot.com/
> RR#2 Bishops Mills, Ontario, Canada K0G 1T0
> on the Smiths Falls Limestone Plain 44* 52'N 75* 42'W
> (613)258-3107 <bckcdb at istar.ca> http://pinicola.ca/
> ------------------------------------------------------------
>
>
> -----
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12/09/13
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