Expert Publications

• Dental development and ontogenetic diet shifts of Roeboides paranensis pignalberi (osteichthyes, Characinae) in pools of the upper Rio Paraná floodplain (state of Paraná, Brazil).
• Trophic morphology of five benthic-feeding fish species of a tropical floodplain.
• Patterns of food resource use by two congeneric species of piranhas (Serrasalmus) on the Upper Paraná River floodplain.
• Effects of the flood regime on the body condition of fish of different trophic guilds in the Upper Paraná River floodplain, Brazil.
• Variation in prey selection of a piscivorous fish after the impoundment of a neotropical reservoir: prey size and type.
• Diet and feeding selectivity of a benthivorous fish in streams: responses to the effects of urbanization.
• Three invasive species occurring in the diets of fishes in a Neotropical floodplain.

Media Releases

Get to know Anesthesiologist Dr. Nathan Hahn, who serves patients in Loves Park, Illinois.

An excellent anesthesiologist, Dr. Hahn joined Rockford Anesthesiologists Associated, LLC in 2012.

In 1962, three local physicians seeking to improve their anesthesiology practices founded Rockford Anesthesiologists Associated, LLC (RAA). For over 50 years, RAA has experienced steady growth and now employs a large group of anesthesiologists and certified registered nurse anesthetists (CRNAs). All of their physicians are board-certified or candidates for certification.

After graduating with his Bachelor of Science degree from Hope College in 2004, Dr. Hahn earned his medical degree from the University of Michigan Medical School in 2008. He completed his internship and residency in anesthesiology at Weill Cornell University in 2012.

Following his training, the doctor attained board certification in anesthesiology through the American Board of Anesthesiology (ABA). As the certifying body for anesthesiologists since 1938, the ABA is committed to partnering with physicians to advance lifelong learning and exceptional patient care. Its mission is to advance the highest standards of the practice of anesthesiology.

In order to remain up to date in his field, he is an active member of the American Society of Anesthesiologists, the Illinois Society of Anesthesiologists, the American Medical Association, the Illinois State Medical Society, and the Winnebago County Medical Society.

Anesthesiology is the medical specialty concerned with the total perioperative care of patients before, during, and after surgery. Anesthesiologists have a vast amount of responsibilities that include vigilant monitoring of the patient’s vital signs during surgery, managing acute pain, maintaining safety, and most importantly, acting as the patient’s advocate in the operating room.

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