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Scientist Profile: Dr. Adriana Aquino
Dr. Adriana Aquino
Dr. Adriana Aquino in her office in the Icthyology Department at the American Museum of Natural History.
© AMNH
Bio

Adriana Aquino is a postdoctoral research fellow in the Ichthyology Department at the American Museum of Natural History. She also works with the National Center for Science Literacy, Education, and Technology to develop the online Seminars on Science courses the Museum offers through Connected University. As a child in Argentina, she was first drawn to science by her love for the natural world, particularly the ocean. In her teens, as she wrestled with questions about the origin of the universe, Adriana was attracted to cosmology. But it was ultimately biology, and trying to understand the nature of life itself, that became her passion.

Amid the turmoil of adolescence and the political and economic upheavals in Argentina, the logic and objectivity of science offered Adriana a sense of stability and purpose. She was questioning her religious faith at the time, and encountering natural laws that could explain the amazing variety of life on our planet and filled a philosophical void. "Science seemed like something firm. It had its own laws, its own weight, and you could do something if you worked hard. And besides — it's amazing!"

Adriana cared strongly about political issues related to ecology and biodiversity, but her work required 19-hour days alone in her lab. She was afraid that as she became more focused on her professional career, she would lose her passion and idealism. She found that her passion only grew, but she couldn't figure out how to balance her commitment to her research with her growing awareness of conservation issues.

A turning point came in 1990, when she worked at a small Argentinean zoo. "It was sad — almost like a hospital," she said. "Many of the animals came from deforested places and had no place to go." But the zoo had a good education program, and Adriana took advantage of the situation to talk to children about ecological problems. The children came back with their parents, and Adriana was amazed by what she saw. "After just 10 to 15 minutes of speaking to them, they were able to teach their parents. That's when I got the idea that if there's hope, it's through education."

Work

Adriana studied with the country's top ichthyologists in La Plata, a city near Buenos Aires. She earned her Ph.D. in 1994, studying the genus Hypoptopoma, a group of armored catfish. Hypoptopoma are distinguished by a series of spiny teeth called odontodes on their armor-like plates. If you run a finger down the scales of an Hypoptopoma from head to tail, you won't feel a thing, but slide your finger the other way and the odontodes prickle like tiny pins.

odontodes
A scanning electron micrograph of odontodes.
© AMNH
Adriana's specialty is systematics, the classification of organisms into species. This is not a simple process. Most species are not as easy to tell apart as, say, humans and chimpanzees. When you consider that there are more than 2,000 species of catfish, and no two individuals in each species are exactly alike, it can be quite difficult to determine what constitutes natural variation within a species, and what constitutes the boundary between one species and another.

For anyone concerned about biodiversity issues, systematics is crucial. "My work is to discover, describe, classify, and revise previous classifications," Adriana explains. "You can't just study 'fish.' If you're talking about a coral reef, you need to know exactly what lives there. If you're concerned about the Amazon, the politicians need a list of what lives in each little stream. Systematics is a pragmatic way of looking at biodiversity."

In 1997, Adriana received a postdoctorate position at the American Museum of Natural History in New York. There she set out to do a revision of the Hypoptopoma genus. She started with the Museum's extensive collection of fish, then contacted other museums around the world to send samples to New York. To study the full range of variation in the genus, Adriana examined all the samples collected in the last 100 years — more than 2,000 specimens in all.

Hypoptompoma inexpectata
Hypoptopoma inexpectata, one of the 2000 catfish specimens Adriana examined as part of her systematics investigation.
© AMNH
When she started out, 15 species of Hypoptopoma had been described. But Adriana found that the case for differentiation between some of these species was not sound. For instance, the defining characteristic of one species was a lack of abdominal plates. Adriana concluded that the observed samples were actually juveniles of another species that grew plates later in life. By the end of the year, Adriana had weeded the number of Hypoptopoma species down to eight. But then she found seven new species, returning the total number to 15.

One fun part of being a systematist is getting to name newly defined species. Adriana named some after previous researchers, some for the places the fish were found, and some for the unique physical characteristics that defined them. For instance, she named one long, slender species elongata, and another, bianalis, because it is the only Hypoptopoma with two plates anterior to the anus, instead of just one.

Interest in Education

Though her research was going well, Adriana still sometimes felt isolated. She considers the Museum's collections to be enormously important, "the inheritance of humanity — a true library of biodiversity." Yet few visitors know the collection exists, or for that matter, that research is an important part of what goes on at the Museum. Adriana had always wished for a stronger connection between the Museum's research and education programs, so when she was asked to contribute to an online course on ichthyology for teachers, she agreed.

Adriana found working with the students and the Museum's team of educators to be incredibly stimulating. "It was like opening a window," she says. One teacher wanted to use the course for elementary education, and one was a teacher of autistic kids. Others had degrees in biology. She corresponded with all of them by email, trying to tailor her approach for each individual. "They all came from different backgrounds, but we shared a common goal," she recounts. "The course allowed us to connect, create a community, find overlapping interests. I learned something from every one of them."

When Maritza MacDonald, the Director of Professional Development for the Museum's Education Department, asked Adriana to help teach a summer institute on biodiversity at the Museum, she agreed again. Adriana taught the attending elementary and high school teachers how to make species identification keys and other activities for children, and explained the connection between systematics and biodiversity. Adriana with Teachers
Adriana with teachers.
© AMNH
Adriana with Teachers
Adriana with teachers in the Hall of Vertebrate Origins at the American Museum of Natural History.
© AMNH
The summer institute went so well that Adriana was asked to teach classes for visiting students from Columbia University and the City University of New York (CUNY) who were studying to become science teachers. Adriana had taught university students in Argentina, but this was the first time she really enjoyed it. "I didn't like teaching, because I was teaching from a textbook," she says. But now she could share her own experiences and show how science really works. "I talk about how I study my fish, and maybe someone else can see the process of science," she says.
Adriana's teaching skills and enthusiasm caught the attention of another member of the Education Department, Jay Holmes, who asked Adriana to develop hands-on activities that would introduce children to systematics. Adriana's contributions will appear in the Museum's new Discovery Room, which is scheduled to open in May 2001.

By putting so much energy into education, Adriana realizes she is taking a chance, because it leaves less time for her research. "Scientists are under strong pressure to survive — you need to publish and write grants; and if you don't get money, you can't go on working," she points out. But she believes scientists have a responsibility to share their knowledge and besides, she enjoys her new role tremendously. So now, in addition to her weekly drawing classes and twice-weekly trips to the opera ("Standing room seats are just $10 — that's hardly more than a movie!"), Adriana is taking a course to become an online guide. In the meantime, she has volunteered for regular "office hours," during which her teacher/students call to discuss the existential questions of life, religion, and of course, systematics.

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© 2001 American Museum of Natural History