debor042

During my first year as a graduate student, a week didn't go by where someone didn't ask me "So what's your research question?"  I hated that question more than anything.  I had combed the literature, searching for research ideas, only to discover everything I was interested in had already been done a hundred times over.  All of the mysteries of the environment had been answered and there wasn't anything left to be studied.  "Why am I even here and why are any of us doing science," I frequently asked myself.   "Ecology is stupid.  Ecology is hard.  I hate Ecology!" were also common chants I shouted in my office (and by office, I mean the spare lab next door that was used for storage and sleeping quarters for homeless grad students).  Then, one day, it suddenly all made sense.  I realized I was being punished by my adviser, because he was punished by his adviser, and his adviser's adviser punished him, etc. etc.... Then I stopped blamin...

Greetings from St. Paul, Minnesota!  I have left the sweltering heat of south Florida for a few days to attend the American Fisheries Society Conference .  Attending conferences is a must-do for graduate students.  It's a chance to share your research with a large, scientific audience, get feedback from the top scientists in your field, and make connections (and new friends) along the way.  These meetings can be a bit overwhelming so I've generated some tips to help you get through them: Photo Credit . 1)  If you're attending a national meeting, chances are there will be anywhere from 10 to 15 talks going on at once.  Running from room to room to see all of them isn't necessarily the best approach.  Stay in one session for a series of talks and sit near the front.  If there are discussions after the talks, don't run off.  Sit and listen and even participate if you have something worthwhile to add!   Photo Credit . 2) Network network netw...

Greetings from the confines of my office!  I have not posted in over a month but lucky for you, the other bloggers have kept you entertained with Alligator vomit , post-quals stress disorder and the joys of working with carcinogens, flammable materials and high-voltage equipment .  If those don't make you want to be a graduate student and/or scientist, then I don't know what will! So what have I been doing?  A whole lot of non-exciting blogging material like processing DIDSON videos , analyzing data, and preparing for conferences.  The good news is now I have some results to share!   One of the most interesting and surprising things I've found in my DIDSON videos is schools of small prey fish (< 12 cm).  Not just one or two on occasion, but nearly every time I go out, in all three of the canals I work in, there are schools.    Some are small (you may need to make the video full screen to even see them): Others are quite large: Some are hi...

For those of you who read Using "Sound" to See Underwater  and Everglades at Night ,  you've learned a bit about the DIDSON (an imaging sonar) and have gathered that some of my work occurs at night in the glades.  Below, I'll explain how I'm using the DIDSON to understand the role of predatory fish in canals of the Everglades. Canals were dredged  in the early 20th century to drain the wetlands and have now become a permanent fixture in the Everglades landscape.  I could write a whole separate article on the harm canals have done, but for now I encourage you to read  The Effects of Canals and Levees on Everglades Ecosystems  for a review on their history and role in the landscape.  Their relevance to my study is that the canals harbor large, piscivorous fish (fish that eat other fish), which is great for recreational fishermen but bad news for the little fish who have to fight for survival in these canals.  Small fish play...

Here are a few short videos taken at night at my research sites.  Pardon the video quality as these were taken with my cell phone.  I'm a little rusty on my frog calls so can anybody identify these sounds?  I think I hear an alligator in the background too.  Make sure you turn the volume all the way up otherwise you may miss it.  Comment below if you can identify the sounds and bonus points to the person who can give the scientific name!  This last one is more for show.  There was an impressive lightening storm north of us that lit up the sky for most of the night.  Don't worry, we were far enough away that it posed no threat to us.

When I first tell people I don't need my eyes or a video camera or even light to see under water, you can imagine the look on their faces and the numerous questions that immediately follow.  Instead, I "look" at fish using a sonar - a Dual Frequency Identification Sonar (DIDSON) to be exact. Dual Frequency Identification Sonar The black cord connects the underwater DIDSON (above) to a computer  on the boat.  This allows me to watch and record everything the DIDSON "sees." Without getting into all the technical details of the DIDSON (visit  the company's webpage  for that), the sonar emits sound-waves that "bounce" off of objects (such as fish) and then return to the unit with information on how far the wave traveled and the "intensity" of the object it hit.  The DIDSON then uses that information to create an image.  Now it's worth noting that the image it creates does not capture information on the color of the fish it hit and it may ...