[NatureNS] re amalgamation of broods in black ducks

Date: Tue, 24 Jun 2008 12:05:00 -0300
From: "James W. Wolford" <jimwolford@eastlink.ca>
To: naturens@chebucto.ns.ca
Cc: Randy Milton <miltongr@gov.ns.ca>
References: <4860CDD2.64D6.0048.0@gov.ns.ca>
Precedence: bulk
Return-Path: <naturens-mml-owner@chebucto.ns.ca>
Original-Recipient: rfc822;"| (cd /csuite/info/Environment/FNSN/MList; /csuite/lib/arch2html)"

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THANKS, RANDY! FROM JIM ET AL.

Begin forwarded message:

> From: Randy G Milton <miltongr@gov.ns.ca>
> Date: June 24, 2008 10:34:59 AM ADT
> To: "James W. Wolford" <jimwolford@eastlink.ca>, Andrew Boyne  
> <Andrew.Boyne@EC.GC.CA>
> Subject: Re: Fwd: [NatureNS] Black Duck question
>
> Hello Jim:
>
> What is described here is a case of brood amalgamation given the  
> short time between sightings.  Although uncommon among dabbling  
> ducks, as a group waterfowl exhibit this characteristic among many  
> species.   Brood amalgamation can occur when young become separated  
> from the hen during disturbances, or when brood densities are  
> high.  This typically occurs early in life as most young are  
> gregarious and until 3-7 days of age have not yet formed stable  
> bonds with parents.
>
> Regards
>
>
>
> Randy Milton
> Manager - Wetlands and Coastal Habitats Program
> Department of Natural Resources
> 136 Exhibition Street
> Kentville, Nova Scotia
> B4N 4E5, Canada
> Tel: 902-679-6224
> Fax: 902-679-6176
> e-mail: miltongr@gov.ns.ca
>
>
>>>> "James W. Wolford" <jimwolford@eastlink.ca> 2008-06-23 5:16 PM >>>
>
>
> Begin forwarded message:
>
>> From: "Paul S. Boyer" <psboyer@eastlink.ca>
>> Date: June 22, 2008 6:00:59 PM ADT
>> To: naturens@chebucto.ns.ca
>> Subject: [NatureNS] Black Duck question
>> Reply-To: naturens@chebucto.ns.ca
>>
>> Our feeding station is visited daily by Black Ducks and Mallards.
>> A female Black Duck appeared a month ago with eleven young.  A day
>> later, she had eight; and a few days after that, three.
>>
>> Then she vanished for a couple of days, and returned with eight
>> ducklings, three of which were noticeably larger than the others.
>> The bigger three must each weigh twice one of the smaller set.
>> Although she is not tagged or otherwise identifiable as the same
>> mother, it looks very much that she acquired a new brood of
>> ducklings to supplement the survivors from the first brood.  The
>> ducklings of different sizes coexist, with no squabbling or
>> pecking, and are obviously following the same female.
>>
>> Does this sound reasonable?  Can a female Black Duck tend a clutch
>> of eggs while leading about the young ones from an earlier hatching?
>>
>> Paul Boyer, Seabright
>
>


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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">
THANKS, RANDY! FROM JIM ET AL.<br><div><br><div>Begin forwarded =
message:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite"><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><font face=3D"Helvetica" =
size=3D"3" color=3D"#000000" style=3D"font: 12.0px Helvetica; color: =
#000000"><b>From: </b></font><font face=3D"Helvetica" size=3D"3" =
style=3D"font: 12.0px Helvetica">Randy G Milton &lt;<a =
href=3D"mailto:miltongr@gov.ns.ca">miltongr@gov.ns.ca</a>></font></div><di=
v style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><font face=3D"Helvetica" size=3D"3" color=3D"#000000" =
style=3D"font: 12.0px Helvetica; color: #000000"><b>Date: =
</b></font><font face=3D"Helvetica" size=3D"3" style=3D"font: 12.0px =
Helvetica">June 24, 2008 10:34:59 AM ADT</font></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><font face=3D"Helvetica" size=3D"3" color=3D"#000000" =
style=3D"font: 12.0px Helvetica; color: #000000"><b>To: </b></font><font =
face=3D"Helvetica" size=3D"3" style=3D"font: 12.0px Helvetica">"James W. =
Wolford" &lt;<a =
href=3D"mailto:jimwolford@eastlink.ca">jimwolford@eastlink.ca</a>>, =
Andrew Boyne &lt;<a =
href=3D"mailto:Andrew.Boyne@EC.GC.CA">Andrew.Boyne@EC.GC.CA</a>></font></d=
iv><div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><font face=3D"Helvetica" size=3D"3" color=3D"#000000" =
style=3D"font: 12.0px Helvetica; color: #000000"><b>Subject: =
</b></font><font face=3D"Helvetica" size=3D"3" style=3D"font: 12.0px =
Helvetica"><b>Re: Fwd: [NatureNS] Black Duck =
question</b></font></div><div style=3D"margin-top: 0px; margin-right: =
0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; =
"><br></div> <div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; ">Hello Jim:</div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; min-height: 14px; "><br></div><div style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">What is =
described here is a case of brood amalgamation given the short time =
between sightings.<span class=3D"Apple-converted-space">=A0 =
</span>Although uncommon among dabbling ducks, as a group waterfowl =
exhibit this characteristic among many species. <span =
class=3D"Apple-converted-space">=A0 </span>Brood amalgamation can occur =
when young become separated from the hen during disturbances, or when =
brood densities are high.<span class=3D"Apple-converted-space">=A0 =
</span>This typically occurs early in life as most young are gregarious =
and until 3-7 days of age have not yet formed stable bonds with parents. =
<span class=3D"Apple-converted-space">=A0</span></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; min-height: 14px; "><br></div><div style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; =
">Regards</div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; min-height: 14px; "><br></div><div style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; =
min-height: 14px; "><br></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Randy =
Milton</div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; ">Manager - Wetlands and Coastal =
Habitats Program</div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; ">Department of Natural =
Resources</div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; ">136 Exhibition Street</div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; ">Kentville, Nova Scotia</div><div style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">B4N 4E5, =
Canada</div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; ">Tel: 902-679-6224</div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; ">Fax: 902-679-6176</div><div style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">e-mail: =
miltongr@gov.ns.ca</div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; min-height: 14px; "><br></div><div style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; =
min-height: 14px; "><br></div> <blockquote type=3D"cite"><blockquote =
type=3D"cite"><blockquote type=3D"cite"><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">"James W. =
Wolford" &lt;<a =
href=3D"mailto:jimwolford@eastlink.ca">jimwolford@eastlink.ca</a>> =
2008-06-23 5:16 PM >>></div> </blockquote></blockquote></blockquote><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; min-height: 14px; "><br></div><div style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; =
min-height: 14px; "><br></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Begin =
forwarded message:</div><div style=3D"margin-top: 0px; margin-right: =
0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; =
"><br></div> <blockquote type=3D"cite"><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">From: "Paul =
S. Boyer" &lt;<a =
href=3D"mailto:psboyer@eastlink.ca">psboyer@eastlink.ca</a>></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; ">Date: June 22, 2008 6:00:59 PM ADT</div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; ">To: <a =
href=3D"mailto:naturens@chebucto.ns.ca">naturens@chebucto.ns.ca</a><span =
class=3D"Apple-converted-space">=A0</span></div><div style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Subject: =
[NatureNS] Black Duck question</div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Reply-To: <a =
href=3D"mailto:naturens@chebucto.ns.ca">naturens@chebucto.ns.ca</a><span =
class=3D"Apple-converted-space">=A0</span></div><div style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; =
min-height: 14px; "><br></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Our feeding =
station is visited daily by Black Ducks and Mallards.<span =
class=3D"Apple-converted-space">=A0 =A0</span></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; ">A female Black Duck appeared a month ago with eleven =
young.<span class=3D"Apple-converted-space">=A0 </span>A day <span =
class=3D"Apple-converted-space">=A0</span></div><div style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">later, =
she had eight; and a few days after that, three.</div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; min-height: 14px; "><br></div><div style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Then she =
vanished for a couple of days, and returned with eight <span =
class=3D"Apple-converted-space">=A0</span></div><div style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; =
">ducklings, three of which were noticeably larger than the others.<span =
class=3D"Apple-converted-space">=A0 =A0</span></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; ">The bigger three must each weigh twice one of the =
smaller set.<span class=3D"Apple-converted-space">=A0 =A0</span></div><div=
 style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; ">Although she is not tagged or otherwise identifiable =
as the same <span class=3D"Apple-converted-space">=A0</span></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; ">mother, it looks very much that she acquired a new =
brood of <span class=3D"Apple-converted-space">=A0</span></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; ">ducklings to supplement the survivors from the first =
brood.<span class=3D"Apple-converted-space">=A0 </span>The <span =
class=3D"Apple-converted-space">=A0</span></div><div style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; =
">ducklings of different sizes coexist, with no squabbling or <span =
class=3D"Apple-converted-space">=A0</span></div><div style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">pecking, =
and are obviously following the same female.</div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; min-height: 14px; "><br></div><div style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Does =
this sound reasonable?<span class=3D"Apple-converted-space">=A0 =
</span>Can a female Black Duck tend a clutch <span =
class=3D"Apple-converted-space">=A0</span></div><div style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">of eggs =
while leading about the young ones from an earlier hatching?</div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; min-height: 14px; "><br></div><div style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Paul =
Boyer, Seabright</div> </blockquote><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: =
14px; "><br></div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div> =
</blockquote></div><br></body></html>=

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