Barbara Denise Petty

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former clinical assistant professor, Department of Large Animal Clinical Sciences, UF College of Veterinary Medicine and aquaculture Extension veterinarian, UF/IFAS School of Forest, Fisheries, and Geomatics Sciences, Gainesville FL

Publications

Koi Herpesvirus Disease (KHVD)

Kathleen H. Hartman, Roy P.E. Yanong, Deborah B. Pouder, B. Denise Petty, Ruth Francis-Floyd, Allen C. Riggs, and Thomas B. Waltzek

Koi herpesvirus (KHV) is a highly contagious virus that causes significant morbidity and mortality in common carp varieties. Common carp is raised as a foodfish in many countries and has also been selectively bred for the ornamental fish industry where it is known as koi. The first recognized case of KHV occurred in the United Kingdom in 1996. Since then other cases have been confirmed in almost all countries that culture koi and/or common carp with the exception of Australia. This fact sheet is intended to inform veterinarians, biologists, fish producers and hobbyists about KHV disease.

Spring Viremia of Carp

Barbara D. Petty, Ruth Francis-Floyd, and Roy P.E. Yanong

Spring viremia of carp is a viral disease that can cause significant mortality in several carp species including the common carp. It was reported in koi and feral carp in the United States for the first time in 2002. Diagnosis in farm raised fish in the U.S. may result in quarantine of the infected fish and depopulation. This revised 5-page fact sheet is intended to inform veterinarians, biologists, culturists, and hobbyists about Spring viremia of carp.

Monogenean Parasites of Fish

Ruth Francis-Floyd, RuthEllen Klinger, Denise Petty, and Deborah Pouder

Monogeneans are a class of parasitic flatworms that are commonly found on fishes and lower aquatic invertebrates. Most monogeneans are browsers that move about freely on the fish’s body surface feeding on mucus and epithelial cells of the skin and gills; however, a few adult monogeneans will remain permanently attached to a single site on the host. Some monogenean species invade the rectal cavity, ureter, body cavity, and even the blood vascular system. Between 4,000 and 5,000 species of monogeneans have been described. They are found on fishes in fresh and saltwater, and in a wide range of water temperatures.

Amonio en sistemas acuáticos

Ruth Francis-Floyd, Craig Watson, Denise Petty y Deborah B. Pouder.

De todos los parámetros de calidad de agua que afectana los peces, el amonio es el más importante después del oxígeno, especialmente en sistemas de cultivo intensivo. Aún en bajas concentraciones, el amonio provoca estrés y daña las branquias y otros tejidos de los peces. Los peces expuestos a niveles bajos de amonio a lo largo de un tiempo son más susceptibles a las infecciones bacterianas, presentan un crecimiento deficiente y no toleran el manejo de rutina tan bien como los peces cultivados en agua libre de amonio. En concentraciones altas, el amonio matará a los peces, y es probable que muchas pérdidas de producción inexplicables hayan sido causadas por amonio disuelto en el agua.

Ammonia in Aquatic Systems

Ruth Francis-Floyd, Craig Watson, Denise Petty, and Deborah B. Pouder

Management of ammonia, the primary waste product of fish, is critical to fish health, especially in intensive systems. At low concentrations, ammonia causes stress and damages gills and other tissues. Fish exposed to low levels of ammonia over time are more susceptible to bacterial infections, have poor growth, and do not tolerate routine handling well. At higher concentrations, it will kill fish. Many unexplained production losses have likely been caused by ammonia.