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Thank you for the interesting explanation, Laurie.
From: naturens-owner@chebucto.ns.ca [mailto:naturens-owner@chebucto.ns.ca]
On Behalf Of Laurie Murison
Sent: January 15, 2011 22:22
To: naturens@chebucto.ns.ca
Subject: Re: [NatureNS] Harbour Porpoise?
This porpoise looks emaciated. The dorsal musculature is concave (both
sides of the dorsal fin) and the skull is beginning to show a bit of a neck.
Emaciation is a common cause of death in the winter when prey species such
as herring are using their own fat reserves. The porpoises may need to eat
two to three times as many fish as they would in the summer to obtain enough
energy depending on the seasonal energy level of each fish. Many can not
find enough to eat and begin metabolizing their blubber. This poses the
additional problem of hypothermia because the blubber is an insulating
layer. Blubber, of course, also helps with streamlining, provides buoyancy
and is elastic which can help with swimming and therefore reducing the
amount of oxygen required since the muscles don't have to work as hard, but
I digress.
Seabirds can also become emaciated in the winter for the same reason.
Laurie Murison
Grand Manan, NB
----- Original Message -----
From: John Kearney <mailto:john.kearney@ns.sympatico.ca>
To: naturens@chebucto.ns.ca
Sent: Saturday, January 15, 2011 5:25 PM
Subject: [NatureNS] Harbour Porpoise?
I found what looks to me to be a dead Harbour Porpoise on the beach at
Arisaig Point this afternoon. Photos are at the following link:
http://picasaweb.google.com/j.f.kearney/MarineMammal#
<http://picasaweb.google.com/j.f.kearney/MarineMammal> .
Can someone confirm the identification?
Thanks,
John
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lang=3DEN-CA link=3Dblue vlink=3Dpurple><div class=3DWordSection1><p =
class=3DMsoNormal><span style=3D'color:#1F497D'>Thank you for the =
interesting explanation, Laurie.<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'color:#1F497D'><o:p> </o:p></span></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-l=
anguage:EN-CA'>From:</span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-l=
anguage:EN-CA'> naturens-owner@chebucto.ns.ca =
[mailto:naturens-owner@chebucto.ns.ca] <b>On Behalf Of </b>Laurie =
Murison<br><b>Sent:</b> January 15, 2011 22:22<br><b>To:</b> =
naturens@chebucto.ns.ca<br><b>Subject:</b> Re: [NatureNS] Harbour =
Porpoise?<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p> </o:p></p><div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-la=
nguage:EN-CA'>This porpoise looks emaciated. The dorsal =
musculature is concave (both sides of the dorsal fin) and the skull is =
beginning to show a bit of a neck. Emaciation is a common cause of =
death in the winter when prey species such as herring are using their =
own fat reserves. The porpoises may need to eat two to three times =
as many fish as they would in the summer to obtain enough energy =
depending on the seasonal energy level of each fish. Many can =
not find enough to eat and begin metabolizing their blubber. This =
poses the additional problem of hypothermia because the blubber =
is an insulating layer. Blubber, of course, also helps =
with streamlining, provides buoyancy and is elastic which can help =
with swimming and therefore reducing the amount of oxygen required since =
the muscles don't have to work as hard, but I digress.</span><span =
style=3D'font-size:12.0pt;font-family:"Times New =
Roman","serif";mso-fareast-language:EN-CA'><o:p></o:p></span></p></div><d=
iv><p class=3DMsoNormal><span =
style=3D'font-size:12.0pt;font-family:"Times New =
Roman","serif";mso-fareast-language:EN-CA'> <o:p></o:p></span></p></=
div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-la=
nguage:EN-CA'>Seabirds can also become emaciated in the winter for the =
same reason.</span><span style=3D'font-size:12.0pt;font-family:"Times =
New =
Roman","serif";mso-fareast-language:EN-CA'><o:p></o:p></span></p></div><d=
iv><p class=3DMsoNormal><span =
style=3D'font-size:12.0pt;font-family:"Times New =
Roman","serif";mso-fareast-language:EN-CA'> <o:p></o:p></span></p></=
div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-la=
nguage:EN-CA'>Laurie Murison</span><span =
style=3D'font-size:12.0pt;font-family:"Times New =
Roman","serif";mso-fareast-language:EN-CA'><o:p></o:p></span></p></div><d=
iv><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-la=
nguage:EN-CA'>Grand Manan, NB</span><span =
style=3D'font-size:12.0pt;font-family:"Times New =
Roman","serif";mso-fareast-language:EN-CA'><o:p></o:p></span></p></div><b=
lockquote style=3D'border:none;border-left:solid black 1.5pt;padding:0cm =
0cm 0cm =
4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:=
5.0pt'><div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-la=
nguage:EN-CA'>----- Original Message ----- =
<o:p></o:p></span></p></div><div><p class=3DMsoNormal =
style=3D'background:#E4E4E4'><b><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-la=
nguage:EN-CA'>From:</span></b><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-la=
nguage:EN-CA'> <a href=3D"mailto:john.kearney@ns.sympatico.ca" =
title=3D"john.kearney@ns.sympatico.ca">John Kearney</a> =
<o:p></o:p></span></p></div><div><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-la=
nguage:EN-CA'>To:</span></b><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-la=
nguage:EN-CA'> <a href=3D"mailto:naturens@chebucto.ns.ca" =
title=3D"naturens@chebucto.ns.ca">naturens@chebucto.ns.ca</a> =
<o:p></o:p></span></p></div><div><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-la=
nguage:EN-CA'>Sent:</span></b><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-la=
nguage:EN-CA'> Saturday, January 15, 2011 5:25 =
PM<o:p></o:p></span></p></div><div><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-la=
nguage:EN-CA'>Subject:</span></b><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-la=
nguage:EN-CA'> [NatureNS] Harbour =
Porpoise?<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:12.0pt;font-family:"Times New =
Roman","serif";mso-fareast-language:EN-CA'><o:p> </o:p></span></p></=
div><p class=3DMsoNormal>I found what looks to me to be a dead Harbour =
Porpoise on the beach at Arisaig Point this afternoon. Photos are at the =
following link: <a =
href=3D"http://picasaweb.google.com/j.f.kearney/MarineMammal">http://pica=
saweb.google.com/j.f.kearney/MarineMammal#</a>.<o:p></o:p></p><p =
class=3DMsoNormal>Can someone confirm the =
identification?<o:p></o:p></p><p =
class=3DMsoNormal>Thanks,<o:p></o:p></p><p class=3DMsoNormal>John<span =
style=3D'font-size:10.0pt;font-family:"Comic Sans =
MS";mso-fareast-language:EN-CA'> =
</span><o:p></o:p></p></blockquote></div></body></html>
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