VIMS Internal Events
This calendar presented by
Virginia Institute of Marine Science
[PAST EVENT] Impacts of hypoxia and pH levels in estuarine tributaries on fish growth and behavior
March 14, 2014
3pm - 4:30pm
Location
VIMS - Watermen's Hall, McHugh Auditorium1375 Greate Road
Gloucester Point, VA 23062Map this location
*Postponed. New date TBD.
Presenter: Dr. Tim Targett, Professor in the College of Earth, Ocean, and Environment at the University of Delaware.
Reception at 3:00 p.m. in the lobby of Watermen's Hall
Seminar from 3:30 p.m. to 4:30 p.m. in McHugh Auditorium, Waterman's Hall, VIMS.
Title: "Impacts of hypoxia and pH levels in estuarine tributaries on fish growth and behavior: a field and laboratory journey"
Background:
Dr. Targett earned his B.S. in Biology from the University of Maine in 1972, his M.S. in Marine Biology from RSMAS, University of Miami, in 1975, and his Ph.D. in Zoology from the University of Maine in 1979. His research interests involve ecology of estuarine and coastal marine fish, physiological ecology of feeding, digestion, growth, and survival, essential fish habitat (EFH), recruitment processes, trophic biology, marine and estuarine food webs, and energetics.
Biography: Dr. Timothy Targett is Professor of Marine Biosciences at the University of Delaware's College of Earth, Ocean, and Environment; School of Marine Science and Policy. He has been a member of the faculty at Delaware since 1984. Targett earned his Ph.D. in Zoology from the University of Maine in 1979, an M.S. degree in Marine Biology from the University of Miami, and a B.S. in Biology from the University of Maine.
Targett teaches, guides graduate students, and conducts research on fish biology and fisheries ecology. His research involves controlled laboratory experiments and field studies on the impacts of physical and biological factors on growth and survival of young fishes in estuarine and coastal marine nursery grounds. Most recently the work in his laboratory has focused on effects of hypoxia on early growth and behavior. He has conducted research in estuaries and coastal marine waters along the east coast of the US, the Pacific Northwest, the Caribbean, Bermuda, Japan, the Irish Sea, Scotland, and Antarctica.
Abstract:
Estuaries, coastal bays, and their tributaries constitute important nursery habitats during the larval and juvenile stages of many estuary-dependent fishes. The functional value of these habitats as nurseries is attributed primarily to physicochemical regimes that are physiologically suitable or optimal, abundant prey resources, and low predation risk; conditions that promote rapid growth and enhance survival of young fishes. Chronic and diel-cycling hypoxia has the potential to diminish growth and survival of these young fishes, and thus negatively impact nursery ground function. This seminar will describe the progression of field and laboratory studies that we have undertaken to investigate hypoxia dynamics in estuarine tributaries and the impacts of hypoxia (and most recently pH) on fish growth, behavior, and survival.
In this research we have shown:
-Spatiotemporally extensive diel-cycling hypoxia in Delaware waters
-Development of a set of computer controlled aquarium systems in which treatment levels and cycles of dissolved oxygen (DO) are monitored, controlled, and recorded
-The negative effects of hypoxia on growth rates of several species in the laboratory
-Interactive effects of hypoxia and temperature on growth rates of several species in the laboratory
-Behavioral avoidance of hypoxia in the laboratory at DO levels above those which cause growth detriments
-Hypoxia avoidance behaviors in the field at levels consistent with laboratory results
-Growth limitation in free ranging fishes in the field
-Growth rate acclimation in mummichogs over several weeks exposure to hypoxia in the laboratory
-Growth rate compensation in juvenile summer flounder upon return to normoxia in the laboratory
-No statistically significant effect of diel-cycling pH (7.2-7.8 or 6.8-8.1) on growth rates and no significant interaction with diel-cycling DO have been shown to-date, although there is the suggestion of an independent influence of low pH on growth of mummichogs at high temperature
Contact [[v|seitz, Rochelle Seitz]] if you would like to meet Dr. Targett while he is here!
Presenter: Dr. Tim Targett, Professor in the College of Earth, Ocean, and Environment at the University of Delaware.
Reception at 3:00 p.m. in the lobby of Watermen's Hall
Seminar from 3:30 p.m. to 4:30 p.m. in McHugh Auditorium, Waterman's Hall, VIMS.
Title: "Impacts of hypoxia and pH levels in estuarine tributaries on fish growth and behavior: a field and laboratory journey"
Background:
Dr. Targett earned his B.S. in Biology from the University of Maine in 1972, his M.S. in Marine Biology from RSMAS, University of Miami, in 1975, and his Ph.D. in Zoology from the University of Maine in 1979. His research interests involve ecology of estuarine and coastal marine fish, physiological ecology of feeding, digestion, growth, and survival, essential fish habitat (EFH), recruitment processes, trophic biology, marine and estuarine food webs, and energetics.
Biography: Dr. Timothy Targett is Professor of Marine Biosciences at the University of Delaware's College of Earth, Ocean, and Environment; School of Marine Science and Policy. He has been a member of the faculty at Delaware since 1984. Targett earned his Ph.D. in Zoology from the University of Maine in 1979, an M.S. degree in Marine Biology from the University of Miami, and a B.S. in Biology from the University of Maine.
Targett teaches, guides graduate students, and conducts research on fish biology and fisheries ecology. His research involves controlled laboratory experiments and field studies on the impacts of physical and biological factors on growth and survival of young fishes in estuarine and coastal marine nursery grounds. Most recently the work in his laboratory has focused on effects of hypoxia on early growth and behavior. He has conducted research in estuaries and coastal marine waters along the east coast of the US, the Pacific Northwest, the Caribbean, Bermuda, Japan, the Irish Sea, Scotland, and Antarctica.
Abstract:
Estuaries, coastal bays, and their tributaries constitute important nursery habitats during the larval and juvenile stages of many estuary-dependent fishes. The functional value of these habitats as nurseries is attributed primarily to physicochemical regimes that are physiologically suitable or optimal, abundant prey resources, and low predation risk; conditions that promote rapid growth and enhance survival of young fishes. Chronic and diel-cycling hypoxia has the potential to diminish growth and survival of these young fishes, and thus negatively impact nursery ground function. This seminar will describe the progression of field and laboratory studies that we have undertaken to investigate hypoxia dynamics in estuarine tributaries and the impacts of hypoxia (and most recently pH) on fish growth, behavior, and survival.
In this research we have shown:
-Spatiotemporally extensive diel-cycling hypoxia in Delaware waters
-Development of a set of computer controlled aquarium systems in which treatment levels and cycles of dissolved oxygen (DO) are monitored, controlled, and recorded
-The negative effects of hypoxia on growth rates of several species in the laboratory
-Interactive effects of hypoxia and temperature on growth rates of several species in the laboratory
-Behavioral avoidance of hypoxia in the laboratory at DO levels above those which cause growth detriments
-Hypoxia avoidance behaviors in the field at levels consistent with laboratory results
-Growth limitation in free ranging fishes in the field
-Growth rate acclimation in mummichogs over several weeks exposure to hypoxia in the laboratory
-Growth rate compensation in juvenile summer flounder upon return to normoxia in the laboratory
-No statistically significant effect of diel-cycling pH (7.2-7.8 or 6.8-8.1) on growth rates and no significant interaction with diel-cycling DO have been shown to-date, although there is the suggestion of an independent influence of low pH on growth of mummichogs at high temperature
Contact [[v|seitz, Rochelle Seitz]] if you would like to meet Dr. Targett while he is here!
Contact
[[v|seitz, Rochelle Seitz]]