Manitoba Peregrines > Brandon Tower Peregrines
Tower Nest - 2013 / ? & ?
RCF:
--- Quote from: Rose on May 25, 2013, 15:02 ---
--- Quote from: The Peregrine Chick on May 25, 2013, 14:05 ---
--- Quote from: Rose on May 25, 2013, 12:21 ---Here's another thought, perhaps this transmitter bird is one with a transmitter that failed and the drop off mechanism didn't work, I presume that all the transmitters used on these birds had one. A failed transmitter doesn't mean that something happened to the bird does it?
--- End quote ---
Interestingly, those who work with transmitters have found that there are characteristic transmission patterns that occur when a transmitter fails permanently, fails but not entirely (like on McDermot) and when a bird dies (like Nipper from West Winnipeg). There is overlap where its hard to tell if its a permanent fail or if the bird has died and the transmitter goes off quickly so the only thing that is known is that up to a couple of months ago there were three bird surviving with transmitters. Remember mortality for first year birds is 50-70% so statistically most of the chicks hatched/hacked last year should have died - we had 12 chicks last year so statistically 8.4 of our chicks are dead and 3.6 have survived and we know of two = Juliet & McDermot. And we know that Juliet survived and was last recorded in Regina, and that the Neepawa female has made it past the first year mark so her mortality risk has dropped dramatically and finally that McDermot's transmitter has been sporadic right from the start and the data seems to indicate that he was still alive at last report.
But there is always space for more surprises ... particularly this year!! ::) ;D
--- End quote ---
So by this reasoning Rain and Rosser (2011) are both dead because one transmitter was reported to be off line after only a few days into migration and the other transmitter was reported off line the next spring on returning migration? I under stood you to say that because the transmitter had failed that it did not necessarily mean the bird was dead.
http://www.species-at-risk.mb.ca/projects/pfrp/forum/programs/index.php?PHPSESSID=680d5c271ecf131d6ef79dc0f92c9435&topic=2830.msg81363#msg81363
--- End quote ---
Here's another link to reports of Rain and Rossers offline transmitters.
http://www.species-at-risk.mb.ca/projects/pfrp/forum/programs/index.php/topic,2952.msg82300.html#msg82300
Rose:
--- Quote from: The Peregrine Chick on May 25, 2013, 14:05 ---
--- Quote from: Rose on May 25, 2013, 12:21 ---Here's another thought, perhaps this transmitter bird is one with a transmitter that failed and the drop off mechanism didn't work, I presume that all the transmitters used on these birds had one. A failed transmitter doesn't mean that something happened to the bird does it?
--- End quote ---
Interestingly, those who work with transmitters have found that there are characteristic transmission patterns that occur when a transmitter fails permanently, fails but not entirely (like on McDermot) and when a bird dies (like Nipper from West Winnipeg). There is overlap where its hard to tell if its a permanent fail or if the bird has died and the transmitter goes off quickly so the only thing that is known is that up to a couple of months ago there were three bird surviving with transmitters. Remember mortality for first year birds is 50-70% so statistically most of the chicks hatched/hacked last year should have died - we had 12 chicks last year so statistically 8.4 of our chicks are dead and 3.6 have survived and we know of two = Juliet & McDermot. And we know that Juliet survived and was last recorded in Regina, and that the Neepawa female has made it past the first year mark so her mortality risk has dropped dramatically and finally that McDermot's transmitter has been sporadic right from the start and the data seems to indicate that he was still alive at last report.
But there is always space for more surprises ... particularly this year!! ::) ;D
--- End quote ---
So by this reasoning Rain and Rosser (2011) are both dead because one transmitter was reported to be off line after only a few days into migration and the other transmitter was reported off line the next spring on returning migration? I under stood you to say that because the transmitter had failed that it did not necessarily mean the bird was dead.
http://www.species-at-risk.mb.ca/projects/pfrp/forum/programs/index.php?PHPSESSID=680d5c271ecf131d6ef79dc0f92c9435&topic=2830.msg81363#msg81363
The Peregrine Chick:
--- Quote from: Rose on May 25, 2013, 12:21 ---Here's another thought, perhaps this transmitter bird is one with a transmitter that failed and the drop off mechanism didn't work, I presume that all the transmitters used on these birds had one. A failed transmitter doesn't mean that something happened to the bird does it?
--- End quote ---
Interestingly, those who work with transmitters have found that there are characteristic transmission patterns that occur when a transmitter fails permanently, fails but not entirely (like on McDermot) and when a bird dies (like Nipper from West Winnipeg). There is overlap where its hard to tell if its a permanent fail or if the bird has died and the transmitter goes off quickly so the only thing that is known is that up to a couple of months ago there were three bird surviving with transmitters. Remember mortality for first year birds is 50-70% so statistically most of the chicks hatched/hacked last year should have died - we had 12 chicks last year so statistically 8.4 of our chicks are dead and 3.6 have survived and we know of two = Juliet & McDermot. And we know that Juliet survived and was last recorded in Regina, and that the Neepawa female has made it past the first year mark so her mortality risk has dropped dramatically and finally that McDermot's transmitter has been sporadic right from the start and the data seems to indicate that he was still alive at last report.
But there is always space for more surprises ... particularly this year!! ::) ;D
Rose:
Here's another thought, perhaps this transmitter bird is one with a transmitter that failed and the drop off mechanism didn't work, I presume that all the transmitters used on these birds had one. A failed transmitter doesn't mean that something happened to the bird does it?
RCF:
The only way I could get a band colour is if the bird sits on the very edge of the cubby hole and at the right angle, the chances are slim. You need someone with a much bigger lens than I have.......you know like Dennis's Wowser or for me to be a lot closer.
¿
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