Monday, July 6, 2015

Leal in the New York Times, again!

We shouldn't be surprised by this anymore, but Manuel Leal is back in the New York Times. This article discusses the talk that Manuel gave at the Animal Behavior Society meeting in Alaska last month. I won't spoil the article for you, but here is a very brief teaser: Manuel and his former graduate student (Brian "Ace" Powell) have been trying to figure out how anoles are able to return home after being artificially displaced. Read the story to learn the MANY different ways they try to solve the mystery!
Job well done, El Jefe.
Have a cafecito on me while out in the forests of the Dominican Republic.

Thursday, July 2, 2015

I SAW A FEMALE LAY AN EGG and other tales from baby season.

Today, I saw one of the coolest things I’ve ever seen during my 5 summers in the field studying Anolis lizards. I watched a female anole lay an egg!!!!

I happened to come across this female while searching for lizards in one of the plots we are using for our study of A. gundlachi females. Through my binoculars, all I noticed at first was that she was an A. stratulus, and not who I was looking for. As I was about to pass over her, she stood over a small divot in the ground and BAM—laid an egg! I was so surprised I just sat there—I’ve never seen this before!

Unfortunately, I didn’t have my camera with me, but of course I had my handy iPhone. When I came to my senses, I scrambled to the ground as gently as possible, and recorded some frames of this female burying her egg. Watch the (poor quality) video below as she repeatedly butts the ground with her snout, and reaches for moist dirt and debris with her feet. At last, she smoothed the earth over the egg, took a deep breath, and hopped back to a Sierra Palm near by. How cool!



We have loved witnessing baby season here in Puerto Rico! We have managed to see juveniles of three anole species, at different stages of growth. Some are so tiny they must just be days old! Unfortunately, many of our photos don’t do their size justice. So, I’ve included a photo with my finger next to a juvenile A. stratulus to give you an idea.



We've started observing the behavior of A. gundlachi juveniles—stay tuned for more pictures and insights into the comings and goings of tiny lizards!

Wednesday, July 1, 2015

A dry, "hoarse" start at the field



In stark contrast to Ellee’s site at the generally sopping wet El Verde Station in the El Yunque rainforest (mean annual precipitation of roughly 4,000mm) the southwestern region of the island exhibits a xeric climate (Yauco’s annual precipitation barely averages around 1,000mm). And the weather that I’ve experienced since my arrival is no exception. Thanks to the drier weather, the predominant feature in the atmosphere aren't the passing clouds but the murky haze of Saharan dust. That’s right – many folks outside the Caribbean may not know that dust storms originating from the Sahara Desert blow across the Atlantic Ocean and sweep through much of the West Indies. But no worry, the dust does little to hamper the enjoyment in the tropics and commencement of some exciting biological research!

And joining me on my lizard collecting excursions is my good ol’ herpetological compañero, Mel. Mel and I have been friends since we were undergraduates and have gone herping together throughout most of the Puerto Rican Bank. So it can’t get any more convenient for us to go herping while considering it “work.” The general plan: collect lizards for my research by day (and sometimes night) and then collect Red-eyed Coquí calls (Eleutherodactylus antillensis) for his research by night (sometimes very late in the night).

Photographic throwback! Mel and I caught off by this snapshot back in May 2012.
I'm holding up an agitated Puerto Rican Racer (Borikenophis portoricensis)
 
From the start, there hasn’t been a dull moment. The first stop that we made to collect lizards was at the edge of the mountains in Yauco. We arrived at our destination which consisted of a strip of grass and bushes off the side of the road which winded around the mountain. One side of the road was an uphill incline of dense tropical woods surrounding a sloped pasture. On the other side of the road was an equally steep downward slope which revealed a beautiful panorama of the lush forest valley below and huddled green mountains beyond. The leaves rustled rhythmically in the wind that passed through the landscape as green ripples across the mountains’ vegetated surface.

There was a small house nearby and Mel suggested asking the homeowners’ permission to trek through the fields uphill. I was originally just thinking of staying near the road edges, but I figured the more ground we could cover, the better! We politely ‘knocked’ by yelling out “¡Hola, buenas tardes!” as the dogs outside the house had already alerted the entire valley of our presence.

An older woman came out of the house to greet us and we introduced ourselves formally as any field biologist would, courteously explaining why random strangers want to walk around her property in the name of science. The kind woman was more than happy to let us venture into the field and asked us to not mind her vocally expressive canines and her horse inside the field.

And so we walked up this path, surrounded by dense brush, leading to the field of four-foot tall grass. Upon reaching the field in what we thought was a “Pulchellus Paradise,” Mel and I split up and diligently combed the area. Fifteen minutes passed and only Mel spotted one lizard before fleeing out of reach.

As I continued uphill I heard something emerge from the bushes at my peripheral. I saw a mammalian head with pointy ears – it was the owner’s horse. I’ve been around horses before. However, most of my interactions with them involved respecting each other’s personal space, which is what I assumed this horse would prefer. But this horse was not having that. He (and it was definitely a ‘he’) trotted straight toward me with much energy either excited to meet me, extremely curious of me or…was just plain offended that I gave him the cold shoulder? As a herpetologist, I know very little on horse behavior. I comfortably understand some mammals like man’s best friend, but I don’t know how to read a horse. This horse had no shame in nudging his nose at my ear. To keep some distance I petted his long face to assure that I meant no harm. I then attempted to resume lizard-finding, but the horse followed me and insisted that he be the center of my attention. Either I had to initiate contact by petting him, or he had to put his face on mine.

I stopped and pondered on how to handle the situation. I took note of the horse’s large powerful legs, each balancing on solid blocks of keratin that could make human bones act squishy. As the horse started chewing on my pants I thought about how blessed I was to be part of a research team with two lab mates who have substantial experience with horses and are not currently here right now to give me input (Ellee, you’re so close yet so far!)
The view of the mountains from my grandparent's porch in Yauco. Despite some cloud cover, the view of the mountains would be much clearer if it wasn't for the Saharan dust. Within those mountains lives a horse with a very assertive personality...to say the least.
I tried to walk away again. As I continued, the horse felt the urge to try to push me down with his face. The ground below my feet had very little traction, and it didn’t help that I was at a 50+ degree incline so I couldn’t exactly get away at a faster pace…not that I could outrun a horse…

Mel called out to me from below, half-laughing at the spectacle that I was in. I told Mel that this horse was forbidding me from very important herping. We both decided that I would continue to walk toward the fence while Mel makes various sounds to attract the horse his way. The closer I got the fence, the more aggressive the horse behaved (aggressively excited to play, aggressively sad or angry that I was trying to leave, I have no idea). And I’ll admit that I ate dirt once (Mel says the horse actually did push me down), but the horse actually restrained himself enough to not step on me like a door mat. Finally his attention turned over to Mel and I accelerated to the fence and make it over. 

I followed the edge of the fence downhill meet up with Mel. The horse was right next to him, but on the other side of the fence which, by the way, only consisted of a single strand of barbed wire a foot off the ground. Looking at how easily it would be for the horse to step over the fence, Mel humorously commented in English, “What dumb animals.” Suddenly the horse started jumping in place. We braced ourselves and the horse turned around and galloped across the field out of our sight. We both headed to the path to leading to the road only to see the horse guarding the access to the path, spinning around and hopping. The brush was extremely dense below us and the only way to get on the path was to step back onto the field. “Great,” I thought. “Not only is this horse intelligent but it’s also bilingual.” 

This predicament forced us to find another way to the road, which involved climbing down through the woods which were completely webbed with vines. In the end, we just looked for lizards on the side of the road. And between that site and another outside the town, Guayanilla, we were successful for the day.

And that’s the story of how Eddie decided to avoid checking for lizards in a field with horses for the rest of the trip. Well I have to run more lizards on the racetrack now.
¡Hasta la próxima vez!


Sunday, June 28, 2015

Meanwhile in Yauco...

Now-a-days when the term “hybrid” is brought up, one thinks of the newer line of automobiles recognized for their fuel economy. Well recently, when I think of hybrids I can’t help but connect the idea to fuel economy as well. Not in cars, however, but lizards!

I’m currently stationed in Yauco, at the southwestern side of Puerto Rico, with the intent of becoming better acquainted with the pure-bred and mitochondrial-hybrid Anolis pulchellus. I chose to set up camp for my field study in Yauco not only because my grandparents reside here and they love to nourish me with seven to eight full course meals every day but also because Yauco is located near the boundary between the two regions that consist entirely of either mitochondrial-hybrid pulchellus to the west and of pure-bred pulchellus to the east.

My grandparents allowed me to convert their backyard shed into a mini-lab under the agreement that they have permission to overfeed me. 


I’m curious as to how the possession of mitochondrial DNA from another species affects the hybrids’ phenotypic traits that are strongly affiliated by a mitochondria’s “fuel economy.”  Are there differences in physiological performance between mitochondrial-hybrid and pure-bred A. pulchellus? For starters, the plan is to capture enough from both groups in order to measure a phenotype, sprint speed. 
Race track set! From this angle a camcorder is set to record each trial as a lizard sprints to the top towards the black bag. (And no worries - there is a screen over that window)

With A. pulchellus known to be one of the more abundant species on the island, I’m hoping to find plenty of specimens. But as any field biologist can tell you, anything can happen.


Stay tuned!

Thursday, June 25, 2015

Tools of the Trade

Next time you read a study involving behavioral observations of animals in the wild, pay close attention to the part of the methods that actually mention those observations. I use “mentions” because I’m willing to bet that you’ll find just one or a few sentences about the process. “We conducted 20 minute focal observations of X number of individuals.” Don’t let these one-liners mislead you. Collecting this type of data is hard work! 

We are busy collecting data on female Anolis gundlachi lizards here in Puerto Rico, and our methods include lots of behavioral observations. Just what does a budding behavioral ecologist need in order to tap into the lives of free-living animals? I’ve already talked a little about this—a comfortable rock is a must. Pencil and paper, a (good!) pair of binoculars, and a fair bit of patience will get you well on your way. But our team is carrying just a little extra. Just check out the contents of Deborah’s field pack!


Once we’re loaded up with everything we need in order to find, watch, and record, we hike to our plots and settle in for a busy day. Deborah and Karen are breaking in our slick new binoculars—turns out this work is more fun when you can actually see the lizards!


 



Tuesday, June 23, 2015

Puerto Rico--La Isla de Aventura!

Fieldwork is an adventure, made all the wilder when it takes place in Puerto Rico.

Today was to be our first day observing the behavior and ecology of female Anolis gundlachi lizards. In order to record their natural behavior, we need to be far enough away from the lizards so as not to disturb their activity. This requires a comfortable rock, a heavy dose of patience, and a good pair of binoculars. So, we set off early this morning this morning to start our behavioral observations of female A. gundlachi.

Well, I should say “tratamos probar” (we tried to try). After a few failed attempts to follow individuals, we discovered that some of the binoculars I brought for us to use were no good. So, off to town Deborah, Karen and I went in search of superior binoculars.

As it turns out, the road to finding binoculars on short notice in Puerto Rico is fraught with obstacles. First, few stores in Puerto Rico carry binoculars, apparently. Second, potholes are no fun. We got a flat tire in Carolina. Resourceful Deborah got to changing it only to discover that our spare was also flat!   

 

But, have no fear—we are a hardy team! Five hours later, we have returned to El Verde Field Station with a repaired tire and three brand spanking new pairs of binoculars. Tomorrow is another day, and maybe this time we can actually see the lizards! Vamanos!


Wednesday, June 17, 2015

Field Season Strikes Again!

One summer just wasn’t enough! I am back at El Verde Field Station in Puerto Rico, finishing off the first full day of Field Season 2015. We spent the day re-acquainting ourselves with the Anolis lizards that call El Verde home. I think they recognized me. 

Meet the awesome new team members gearing up to shed light on the secret lives of female Anolis lizards! Karen is our cooking aficionado, and joins me from the University of Missouri. She is pursuing a degree in Biology, and plans to attend Veterinary school upon graduating. Deborah is our resident expert on Puerto Rico, and is putting me to shame with her lizard spotting skills! She attends the University of Puerto Rico in Aguadilla, where she is studying biology. Look out for more from these two—they’ll be sharing their thoughts as our field season progresses!
Deborah and Karen enjoying an overcast first day in the field!


Got to run--It's taco night! Stay tuned for more tales from the field!