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A few quick field photos for Rana luteiventris

P

paris

Guest
hi guys, just a few quick photos and notes here-i will post more notes and etc in the future. i now live in a house with internet-but am having difficulties with it-so i am currently at the library to post this.
i have a camera now (before most of my photos were taken with a still function on a video camera). these photos were taken with a sony ericsson W810i, which is a phone/camera hybrid. the images it takes are very large and in surprising detail, ive had to crop and adjust many of these with photoshop though to post them here.

these frogs are commonly known as Columbia Spotted Frogs (CSF) and are a smaller Ranid.breeding season may or may not be over, depending on the weather. these photos are of recent animals and tadpoles at current development. these are from the central eastern part of the state -we also monitor breeding populations in the west desert, and those relict populations are a bit different.

there are still some egg masses being laid but most are at 'stage3+' to full independent tadpoles. here is a photo of recently hatched taddies. the info is that they hang around for a while on the old jelly eating it and hiding in it. snails will also be drawn to the old decaying jelly and can be seen with the tadpoles. these are more advance rounded belly taddies, they hatch out very flat and can be mistaken for leeches swimming in the water until they get the gill covers and belly.
82728.jpg

here is a photo of some free swimming ones basking on a submerged reed.
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here is a pic of more recent hatched ones
82730.jpg


they do move to the upper water for warmth and i saw this HUGE congregation -it contained easily 500+ tadpoles in the edge of a breeding pond. the temp was 61F where they were-in contrast another egg mass in the shadows was at 47F.
82731.jpg


i spent friday indoors tagging and rebagging field specimens, all are CSF except for one tiger sal. we bag all dead and dyeing frogs and send them off for chytrid testing
82732.jpg

this is a specimen i found in the field. i have collected 2 other dead ones in the same spot over the past 3 weeks. i thought it was dead at first. it couldnt right, had redness around the head and had cloudy eyes and the skinny look to it-i had to euthanize this one and its destined for chytrid testing.
the belly is typical of the eastern region, the west desert ones are more vivid yellow and even some orange.
82733.jpg

82734.jpg
 
Thanks for the photos and info, Paris.
Hope you're enjoying the field.
Seen any tigers yet?
What are you using for euthanasia...MS-222?
Has the chytrid fungus appeared in Utah before?
Speaking of huge tadpole congregations, here's one I saw this last weekend near my house
biggrin.gif


82757.jpg

<font size="-2">(Bufo japonicus, I think)</font>

Keep those pics coming!
 
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