Studie über Imitation von Gerüchen der Varroen

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Studie über Imitation von Gerüchen der Varroen

Beitragvon bee » So Jun 07, 2015 7:29 pm

sehr interessant!!!!

das wird gerade in Dees Forum diskutiert:
sehr interessant vor allem die Tatsache daß bei den Bienen apis cerana immer schon ein kleines Loch in der Drohnenbrut festgestellt wird, was wir bei unseren Bienen nicht kannten.
Und nun zeigt Dee auf daß unsere Bienen hier das früher auch machten!!!!, dokumentiert in alter Literatur!!!



Eine Studie hat festgestellt, dass Varroa destructor einen Geruch abgibt, der den Bienengeruch imitiert um ihre Präsenz im Bienenstock zu verschleiern.
http://rsbl.royalsocietypublishing.org/ ... 6/20150233

Beginn der Debatte von Steven:
Varroa smells like bees
Thu Jun 4, 2015 7:17 am (PDT) . Posted by:
"Steve" stevemurphy1084
A study has determined that Varroa destructor emits an odour that mimics the
bees odour to disguise its presence in the beehive. It has been believed
that the hole left in the top of Apis Cerana Drone brood was to allow the
bees to smell the mites and remove them but if this study is correct that
mites mimic the smell of there host then that assumption is unlikely to be
true.

Link to study is here
http://rsbl.royalsocietypublishing.org/ ... 6/20150233

Steven Murphy


Stellungnahme von Joe:
2b
Re: Varroa smells like bees
Thu Jun 4, 2015 8:25 am (PDT) . Posted by:
"Joseph Bessetti" bees_in_tandem
Hi Steven,

In my own small cell bees I have not observed the bees leaving a small hole in the cap. My bees completely cap all of the brood. Then, at about the purple-eyed stage in development I start seeing small holes chewed into some of the caps, followed by complete removal of the cap and then removal of the pupae. I've spent some time inspecting these frames closely and can nearly always find evidence of mites in the opened cells.

My understanding of the process is that the bees are able to sense the presence of mites in the capped cells, which is why they preferentially chew open the ones containing varroa. I have not previously read about the bee's ability sense varroa in the capped cells having any dependence on the cuticular hydrocarbons present on it's exoskeleton. Bees that exhibit this kind of behavior will also preferentially chew out brood infected with brood diseases, which would be a completely different set of "smells". Personally, I would speculate that a more generic detection strategy might be involved, perhaps associated with stress response of the infested brood? I admit though that I have not been keeping up my reading on this line of research.

Reference number 7 in this article focuses on passive camoflage, which is picked up by the mites through direct contact with this host, rather than being specifically synthesized by and expressed by the mite. This study that you shared can easily support this same mechanism. Basically, spend enough time in a bear cave with bears and you'll probably start smelling like one...

Regardless of all of this, small cell bees in balance with nature are able to sense and chew open varroa infested brood cells, just one of many factors that maintains natural balancing of varroa numbers in the colony.

Regards,

Joe


Stellungnahme von Dee:
2e
Re: Varroa smells like bees
Thu Jun 4, 2015 9:09 am (PDT) . Posted by:
deelusbybeekeeper

In a message dated 6/4/2015 7:17:45 A.M. Pacific Daylight Time,
Organicbeekeepers@yahoogroups.com writes:

A study has determined that Varroa destructor emits an odour that mimics
the
bees odour to disguise its presence in the beehive. It has been believed
that the hole left in the top of Apis Cerana Drone brood was to allow the
bees to smell the mites and remove them but if this study is correct that
mites mimic the smell of there host then that assumption is unlikely to be
true.

Link to study is here
http://rsbl.royalsocietypublishing.org/ ... 6/20150233

Steven Murphy

reply:
and yet earlier writings talked about breathing holes in broodnest cells
for pupae/babies inside to have air going in and out for better breathing,
......so guess it what one thinks is happening thru the holes. But if eating
same food which the mites do and also co-existing living together, then
normally sleeping in same bed, would think, any animals would smell similar in
rubbing, hugging and other they are doing co-existing....


and also in reading earlier studies, the bees listen thru the holes too,
and can see thru them also, and so with movement in hives, smells, and
sounds, then with chewing out of varroa by taking the caps off for checking if
feeling/seeing something wrong, the nurse bees then go in and starting at the
head take odd tick off and let it be...................or if seeing or
hearing of problems lower on body then go lower.........and same with open
brood not capped yet...........you think the young, like our young don't emit
smells and sounds for I am hurting, so help me?....if
necessary...............

So to me it's a whole picture for looking at and observing and seeing what
going on.............and again co-existant living in same bed (cell in this
case) means same food and same smells upon both being shared
impov.............so nothing new!!!

Anyway, food for thoughts Steve, so keep reading and thinking!!! and
observing your honeybees in a natural environment.........................for
it's different doings once man chances things, though many researchers are not
taught that part...........just bees are bees, which is sad.

Dee A. Lusby


und auch von Dee:
2f
Re: Varroa smells like bees
Thu Jun 4, 2015 9:18 am (PDT) . Posted by:
deelusbybeekeeper

In a message dated 6/4/2015 8:52:46 A.M. Pacific Daylight Time,
Organicbeekeepers@yahoogroups.com writes:

The hole in the Drone brood cell cap is with Apis Cerana the Asian honey
Bee
and not present in Apis Mellifera. It was always assumed that the hole was
left so that the bees could better smell the presence of Varroa but I
wonder
if that is true if the Varroa are making themselves smell like there host
colony????


I might agree with you that it's more of a sensing of the stress of the
brood but nobody seems to fully understand why Cerana leave this hole in
there drone brood caps.

reply;
you go back to 1880s and read early writings and even apis mellifera and
small black bee of europe had this hole, and even very tiny ones with worker
broo
d were noted at times, but gotta have good eyes to see for so
tiny........for bees break out in bands around the earth and so to me by sizing and
latitude and altitude this is in alignment with doings.....but then really
gotta be into finite looking to see for the most part........but several
real old archives go into this in europe and UK various doings early on long
ago.

Dee


und nochmal Dee:
2g
Re: Varroa smells like bees
Thu Jun 4, 2015 9:22 am (PDT) . Posted by:
deelusbybeekeeper

In a message dated 6/4/2015 8:57:34 A.M. Pacific Daylight Time,
Organicbeekeepers@yahoogroups.com writes:

Maybe the hole allows the bees to smell the varroa crap, instead of the
varroa.

reply;
the hole does more than that Marshall, for way back was for seeing,
breathing, and hearing vibrations/talk down inside, etc..............and lots old
archives from many old countries went into this with the various
settlements that exchanged information early on, even back to pre-columbus times
.............and so oldest archives like in spain and italy and early UK
doings, etc written by missionaries/and those in journals on ships which were for
sent for discovering and learning, have a lot, though today, not many
granted access to read deeply and going back centuries.

Dee


mehr darüber im internen Bereich:
http://forum.resistantbees.com/viewtopi ... 8528#p8528
liebe Grüße
bee

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