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Title Image


This blog is predominately about camera trapping in California. We camera trap to save our souls and to teach primary school students about biology and conservation. We will also touch on other camera trapping news and musings, sets from afar, mediocre herpetology, sucky birding, and other natural history discussions.

Monday, October 29, 2012

Sights of Fall in the Great Basin

I went to the Mono Basin with Randomtruth and the Codger in early October with thoughts of grandeur dancing in my head. We might see trees that actually change color in the Fall, we might see life birds, we would pick up a couple of RTs cameras filled with the possibility of exotic (to us coastal dwellers) critters, we might even see a late season Great Basin Rattlesnake, but we were guaranteed to have good company, some good beer and great food.

We saw Fall colors. We saw wild canyons. We saw bizarre geology.

Life-birds will have to wait for another post.




Yes, basically the same image as above that my post-processing software really wanted to make more orange than yellow, probably due to the image being under-exposed. The true color may have been somewhere in between, but I honestly cannot remember. I was mesmerized by the quacking leaves. Don't judge, you would have been too.







WTF, with that last image you are thinking?!?

That doesn't look like Fall colors. Well you would be right. It doesn't look like Fall.

What it looks like is the snowstorm we hit going over Tioga Pass into Yosemite Valley on our way home.  A few hours later the pass was closed because of the snow. We made it through just in time.

Monday, October 15, 2012

Dart Frog Mate Choice

I first saw a paper on Dart Frog mating choice being discussed in a blog post journal club. Molecular Ecology.  Might be my favorite topic! F Epigenetics.

The first image in the blog post immediately struck me. It was of an Strawberry Dart Frog, Oophaga pumilio. Note that this frog used to be in the genus Dendrobates, most have accepted to the switch to its own genus Oophaga and I will use that. This one was a deep orange, with minimal small black spots and a nice creamy-white belly. It looked exactly like a small population that occurs on Isle Bastimentos in Panama. But not just on Isla Bastimentos, a population that only occurs on part of the island, a population that I have spent two different trips getting to know. A similar morph also occurs on Isle Solarte, but again is limited in its range on Bastimentos. As you move East and South on Bastimentos the frogs again get redder and have minimal to no spotting, but the creamy white belly gets greener and darker and climbs up from the feet up the legs. I went back and read the caption that stated
"Strawberry dart frog, Dendrobates pumilio, photographed at La Loma Jungle Lodge on Isla Bastimentos, Panama." 
And this was where I got excited. It was the same population I was thinking of. I too saw these guys on the property of La Loma Jungle Lodge. If you go west on the Island the frogs got brighter red and the black spots got much larger, almost like a lady bug. These large spotted frogs can also be yellow, greenish or blue, but always have large black spots. There are different morphs on this single Island, and many other morphs on other islands in the archipelago and on mainland Panama and Costa Rica.

I then realized that I met the senior investigator on this paper at La Loma, three or four years ago. If I remember right she was working through the MVZ at UC Berkeley and was recording calling male dart frogs at La Loma and was also doing some of the work that appears in this paper and a previous one at the Smithsonian Tropical Research Institute Field Station in Bocas. Dr Richards-Zawaki now has her own lab at Tulane University. I was able to talk to Cori when she got in from the field at the lodge. She invited my girlfriend and I out to the Field Station the next day before we took a flight to Panama City. She was kind enough to take over an hour giving us a tour of the station, including research done on coral reefs, birds and her own on dart frogs. She explained her experimental set-up and showed us her pairings on pumilio of different morphs (check Fig 1. in second paper cited below) and how she was testing for color selection in mating type choice and was doing experiments to determine if tadpoles raised by a parent of a different morph (she switched tadpoles and gave them to foster parents) chose mates based on what morph they were or what morph "they were raised as" (my words) ie. the morph of the foster parent.

Now this is where I am going to use this post to shamelessly plug some of my Oophaga pumilio, images taken 3 and 4 years ago at the La Loma Jungle Lodge.  The folks who own and run La Loma, Henry and Maggie, their son Lucho, and their head assistant Mr. Kelly are fantastic people and it is a great place to stay. It is a true Eco Lodge in that has only three cabins, not one of those giant fake Eco Lodges. They do a great job and the food is fantastic. The Maracuya custard is to die for. Oh to be a rich lab tech again. *sigh*

All images of wild frogs.



Dendrobates Pumilio Bastimentos






Look for another Oophaga pumilio post in a couple of weeks.

Works Cited:
Richards-Zawacki, C. L., I. J. Wang and K. Summers. 2012. Mate choice and the genetic basis for color variation in a polymorphic dart frog: Inferences from a wild pedigree. Molecular Ecology, 21: 3879-3892.

Richards-Zawacki, C.L. and M. E. Cummings. 2011. Intraspecific reproductive character displacement in a polymorphic poison dart frog, Dendrobates pumilioEvolution, 65: 259-267.

Santos, J. C., L. A. Coloma, K. Summers, J. P. Caldwell, R. Ree, and D. C. Cannatella. 2009. Amazonian amphibian diversity is primarily derived from late Miocene Andean lineages. PLoS Biol. 7:448–461.