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Tuesday, July 7, 2009

Species of the Month: July

beetleThe Gyrinidae are a family of charismatic aquatic Coleoptera commonly known as whirligig beetles, for their gyrating swimming style. Gyrinids are peculiar for having completely divided eyes giving them the appearance of having four eyes: two that peer above the water and two that peer below the water. They swim about on the surface tension of the water kicking with two pairs of paddle-like legs. The species selected for this month is a whirligig beetle in the genus Gyretes. Gyretes can be characterized by a furry pubescence that usually outlines most of the beetle´s body. However, the Gyretes selected here is nearly completely covered in this hairy pubescence. It also happens to be one of the largest known Gyretes. It is found here in Venezuela and I (Grey) am hoping that I will have the opportunity to collect this charismatic gyrinid on this trip.

Monday, July 6, 2009

The Perija

We  left for a quick 2-day trip to the small village of Tukuko, an outpost at the foot of the Serrania de Perija (see photo at left)--the mountain range that forms the northwestern boarder with Colombia. It has become almost a tradition to visit this area on the first few days of each trip...in fact, all five trips have now started with a visit to this area. It takes about 4 hours to make the trip from Maracaibo...two hours to Machiques by car or bus (or a carrito in our case...), and then another 1.5 hours in the back of a pickup truck or similar transport over dusty dirt roads. It rained during the second half, and that made things a bit muddy. Upon arrival we spent a few hours searching out various Zingiberales that might have some interesting beetles living in the micropools. I had collected them here last July, and was eager to get more....and we did. The second day also brought rain in the morning and we scratched it for collecting, but the afternoon was great and we were able to get into one of the local rivers to do some work. Got some space in an outgoing pickup truck around 3:30 and headed back to Maracaibo.

Monday, February 9, 2009

Post-Expedition Chills

map

Places we sampled on the expedition

The return trip last Friday went smooth and the first 2009 expedition has come to a close. I was not eager to rejoin the cold, but was very much looking forward to hot showers again. In addition to the factoids in my 27 January post, here is another one: nearly 2500 miles driven over the course of 33 days. Now that we’re back in the lab, the real work begins: sorting and preparing the specimens for study, which will take my several months. We expect to prepare about 20,000 specimens from this trip. In this case, “prepare” means to mount, label, and database each one. When done efficiently, that can be one at an overall rate of 25 per hour. Fortunately, I have some great student help to move the process forward, and we should just be wrapping up this material in time for our next expedition in July. Until then.

Thursday, January 29, 2009

For your listening pleasure

Approaching Serrania de Perija

After a quick two-day stint around the small village of Tukuko at the foot of the Perija mountains, we returned this afternoon to Maracaibo. With less than 8 hours to go before I have to catch my taxi to the airport at 4am, all that remains is to repack my luggage, thank my collaborators, and try to catch a bit of sleep. As I recharge my mp3 player for the trip home, I realized that I have neglected to mention Venezuelan music. Those of you who have worked with me know that I have a penchant for listening to “Llanera”, which is the music typical in the Llanos (plains). Anyway, here is a good youtube clip showing some folks playing this kind of music. There are three main instruments: A harp (yes, a harp), a cuatro (small guitar), and maracas. Sometimes a bass is added as well, as in this clip. Spend 4 minutes and watch it. You will never see a harp the same way again:
https://www.youtube.com/watch?v=780dXFgnA9g&feature=player_embedded

Tuesday, January 27, 2009

The wrap-up begins

coffee

The coffee is good here in the museum, but I think it would take about 8 of these to fill my normal office mug.

Back in Maracaibo, we’ve been resting and wrapping up loose ends now that the main expedition of the trip is over. I’ve spent the last two days cleaning and preparing our samples for transit. In total, we have collected at 50 different localities, making more than 150 separate ecological collections. It’s hard to even estimate how many specimens we have, but it probably ranges well over 100,000. Considering that is entirely from hand-collecting (e.g. not bulk trapping, etc.), that is quite a bolus indeed, and I think we are all excited about the overall success of the collecting. A Colombian graduate student from the Universidad de los Andes in Bogota arrived for the week to get some hands-on training in identifying water beetles and will participate in a last 2-day foray of collecting. We’ll all leave tomorrow morning around 6am to do some more work in the Serrania de Perija, the mountains we collected in the very first day I was here.

Friday, January 23, 2009

Cactus

After our rain day on Tuesday, we finished off the last two days of the main expedition by driving a circuit from Biscucuy to Trujillo, and then winded out of the Andes in the state of Lara and back to Maracaibo yesterday evening. The rain was a bit more widespread than I had hoped, and the condition of many of the rivers was less than exceptional for collecting — recent rain also can throw off our water chemistry readings. Nevertheless, we still made good progress and had a few surprises. In a small stream pool at about 2000 meters, I collected a series of a genus that had previously been thought to be restricted to Guyana, Suriname and northern Brazil; the Andes are quite a different region to find them in. I’m anxious to study these further when I get back to my lab.

After dropping out of the Andes in the north-central region in Lara and Falcon, the landscape is very arid…almost resembling New Mexico or Arizona. While hiking down to collect in a small stony stream, I took what must have looked to my collaborators like a cartoonish fall down the bank into patch of cactus and a hodgepodge of other menacing plants. Fortunately, I was able to sit in the river to sooth my pincushion right leg and arm and work at the same time…yet another benefit of studying aquatic insects.

The north central region of Venezuela is very dry, and includes both arid scrubland and even deserts with sand dunes.

Tuesday, January 20, 2009

A rainy inauguration

LagoonWe awoke this morning to heavy rain. Not a passing shower, but a uniform grey sky with flooded streets. Aside from a 20-minute squall while we were in the llanos, this is the first time it has rained on our expedition. By 11 am with no end of the rain it sight, we decided to write the day off and relax. I’m not opposed to working in the rain, but the bigger problem is that all of the streams and rivers have been converted into a slurry of mud, water, and debris. While having my coffee at the local corner store, I sat and watched the ongoing coverage of the inauguration. In fact, at least three of the places we stopped by today (the internet café, the hotel, etc.) all were tuned to inauguration coverage. To be honest, I don’t know if that was because all the channels were carrying it, or they chose to watch it. But in any event, when was the last time you tuned in to the live swearing in of Mexico’s president? So, we watched the whole thing live, dubbed over by a Spanish translator. Watching it also reminded me that it will be cold cold cold when I get back.

Monday, January 19, 2009

Hello, Andes

Over the last few days, we finished our work in Amazonas and cross the Orinoco back to the Llanos region, staying in San Fernando de Apure. Kelly and Luis split from our group yesterday and headed back to Maracay; Luis has to fly back to New Mexico today, so he can teach tomorrow. The rest of us drove straight west and today we started our winding accent into the main Venezuelan Andes. Tonight we stopped for the day in Biscucuy, which is at about (a relatively low) 500 meters elevation. Over the next couple of days, we will cover some of the higher elevations, up to 3000 meters. The highest peaks near the town of Merida reach just over 5000 meters.

Wednesday, January 14, 2009

New Animals and Ant Heads

We arrived in Puerto Ayacucho yesterday, the capital of the state of Amazonas. We will be staying here for a few days while we scope out streams in the area. This area has been particularly productive on past expeditions as there are a lot of  rock slides —  rivers that flow over large expanses of exposed granite, and do not have any substrate. These create very unusual habitats that foster very unusual insects. In fact, since these areas are rarely (sometimes never) visited for collections work, most of the things we see are new to science. For me, these are the most exciting parts of the trip. Imagine being the first person to ever see a type of animal for the first time, to observe what it does, how it behaves, where it lives. This happens many times here, and in this area, around 8 out of every 10 species we find will be new.

These are the exciting moments of discovery that give many of us a rush. In terms of water beetles, we will probably collect about 100 to 150 species on this expedition that do not yet have names. This is another reason we are collecting so much other information on the water quality, human disturbance, and other things. We also take hundreds of photos and copious notes. In some cases, the information we collect on some of these species may be the only record of their existence for the next hundred years or more, as these areas are rarely surveyed. Consequently, we try to take in not just vouchers of the insects, but also all the observations we can bear to record. On a totally random note, there is a local hot sauce here called Catara that is served with almost every meal. It is made mostly with yucca and the crushed heads of ants. It tastes OK, but I don't find it to be anything special.