Pamela J Schofield, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 56
Salinity effects on behavioural response to hypoxia in the non-native Mayan cichlid Cichlasoma urophthalmus from Florida Everglades wetlands Salinity effects on behavioural response to hypoxia in the non-native Mayan cichlid Cichlasoma urophthalmus from Florida Everglades wetlands
This study quantified the hypoxia tolerance of the Mayan cichlid Cichlasoma urophthalmus over a range of salinities. The species was very tolerant of hypoxia, using aquatic surface respiration (ASR) and buccal bubble holding when oxygen tensions dropped to
Authors
P. J. Schofield, W.F. Loftus, J.A. Fontaine
Assessment and control of an invasive aquaculture species: An update on Nile tilapia (Oreochromis niloticus) in coastal Mississippi after Hurricane Katrina Assessment and control of an invasive aquaculture species: An update on Nile tilapia (Oreochromis niloticus) in coastal Mississippi after Hurricane Katrina
We provide information about the effects of Hurricane Katrina on populations of an invasive fish, the Nile tilapia (Oreochromis niloticus) in southern Mississippi. By resampling areas surveyed before the storm, we attempted to determine whether the species expanded its range by moving with storm-related floods. Additionally, we used rotenone to eradicate individuals of this species at a...
Authors
Pamela J. Schofield, W. Todd Slack, Mark S. Peterson, Denise R. Gregoire
Hypoxia tolerance of two centrarchid sunfishes and an introduced cichlid from karstic Everglades wetlands of southern Florida, U.S.A. Hypoxia tolerance of two centrarchid sunfishes and an introduced cichlid from karstic Everglades wetlands of southern Florida, U.S.A.
In this study, the hypoxia tolerance of three Everglades fishes, two native centrarchids (Lepomis gulosus and Lepomis marginatus) and a recently introduced cichlid (Hemichromis letourneuxi), were documented. Aquatic surface respiration (ASR) thresholds were lowest for H. letourneuxi, followed by L. gulosus, then L. marginatus. The ASR thresholds for L. marginatus were within ranges...
Authors
P. J. Schofield, W.F. Loftus, M.E. Brown
Toxicity of 5% rotenone to nonindigenous Asian swamp eels Toxicity of 5% rotenone to nonindigenous Asian swamp eels
Our primary goal was to determine whether rotenone would be a useful control against introduced populations of Asian swamp eels (family Synbranchidae, genus Monopterus). We report the results of a laboratory experiment comparing the efficacy of various rotenone concentrations (1, 2, 4, and 8 mg of 5% liquid rotenone/L of water) in killing nonindigenous swamp eels of various sizes (1-350...
Authors
P. J. Schofield, L.G. Nico
Salinity tolerance of goldfish, Carassius auratus, a non-native fish in the United States Salinity tolerance of goldfish, Carassius auratus, a non-native fish in the United States
No abstract available.
Authors
Pamela J. Schofield, Mary E. Brown, Pamela L. Fuller
Foreign Nonindigenous Carps and Minnows (Cyprinidae) in the United States - A Guide to their Identification, Distribution, and Biology Foreign Nonindigenous Carps and Minnows (Cyprinidae) in the United States - A Guide to their Identification, Distribution, and Biology
No abstract available.
Authors
Pamela J. Schofield, James D. Williams, Leo G. Nico, Pamela L. Fuller, Matthew R. Thomas
Non-USGS Publications**
Schofield, P.J. & D.H. Huge. 2011. Low-temperature tolerance of two non-native fishes (Hoplosternum littorale [Hancock 1828], Cichlasoma bimaculatum [Linnaeus 1758]) established in Florida. Florida Scientist 74: 73-83.
Schofield, P.J. & L.J. Chapman. 1999. Interactions between Nile perch, Lates niloticus, and other fishes in Lake Nabugabo, Uganda. Environmental Biology of Fishes 55(4): 343-358.
Schofield, P.J. & G.H. Burgess. 1997. Etmopterus robinsi: A new species of deep-water dogshark (Elasmobranchii, Etmopteridae) from the Caribbean and Western Atlantic with a redescription of E. hillianus. Bulletin of Marine Science 60(3): 1060-1073.
Kolar, C. and P. Schofield. 2009. Early detection and rapid response for nonnative marine fishes. Fisheries and Aquatic Bulletin (USGS) 9:7-9.
Schofield, P.J. 2003. Factors affecting the distribution and densities of two gobies (Microgobius gulosus and Gobiosoma robustum) in a lagoonal estuarine system (Florida Bay, USA). Doctoral dissertation, Department of Biological Sciences, University of Southern Mississippi.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
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Science and Products
Filter Total Items: 56
Salinity effects on behavioural response to hypoxia in the non-native Mayan cichlid Cichlasoma urophthalmus from Florida Everglades wetlands Salinity effects on behavioural response to hypoxia in the non-native Mayan cichlid Cichlasoma urophthalmus from Florida Everglades wetlands
This study quantified the hypoxia tolerance of the Mayan cichlid Cichlasoma urophthalmus over a range of salinities. The species was very tolerant of hypoxia, using aquatic surface respiration (ASR) and buccal bubble holding when oxygen tensions dropped to
Authors
P. J. Schofield, W.F. Loftus, J.A. Fontaine
Assessment and control of an invasive aquaculture species: An update on Nile tilapia (Oreochromis niloticus) in coastal Mississippi after Hurricane Katrina Assessment and control of an invasive aquaculture species: An update on Nile tilapia (Oreochromis niloticus) in coastal Mississippi after Hurricane Katrina
We provide information about the effects of Hurricane Katrina on populations of an invasive fish, the Nile tilapia (Oreochromis niloticus) in southern Mississippi. By resampling areas surveyed before the storm, we attempted to determine whether the species expanded its range by moving with storm-related floods. Additionally, we used rotenone to eradicate individuals of this species at a...
Authors
Pamela J. Schofield, W. Todd Slack, Mark S. Peterson, Denise R. Gregoire
Hypoxia tolerance of two centrarchid sunfishes and an introduced cichlid from karstic Everglades wetlands of southern Florida, U.S.A. Hypoxia tolerance of two centrarchid sunfishes and an introduced cichlid from karstic Everglades wetlands of southern Florida, U.S.A.
In this study, the hypoxia tolerance of three Everglades fishes, two native centrarchids (Lepomis gulosus and Lepomis marginatus) and a recently introduced cichlid (Hemichromis letourneuxi), were documented. Aquatic surface respiration (ASR) thresholds were lowest for H. letourneuxi, followed by L. gulosus, then L. marginatus. The ASR thresholds for L. marginatus were within ranges...
Authors
P. J. Schofield, W.F. Loftus, M.E. Brown
Toxicity of 5% rotenone to nonindigenous Asian swamp eels Toxicity of 5% rotenone to nonindigenous Asian swamp eels
Our primary goal was to determine whether rotenone would be a useful control against introduced populations of Asian swamp eels (family Synbranchidae, genus Monopterus). We report the results of a laboratory experiment comparing the efficacy of various rotenone concentrations (1, 2, 4, and 8 mg of 5% liquid rotenone/L of water) in killing nonindigenous swamp eels of various sizes (1-350...
Authors
P. J. Schofield, L.G. Nico
Salinity tolerance of goldfish, Carassius auratus, a non-native fish in the United States Salinity tolerance of goldfish, Carassius auratus, a non-native fish in the United States
No abstract available.
Authors
Pamela J. Schofield, Mary E. Brown, Pamela L. Fuller
Foreign Nonindigenous Carps and Minnows (Cyprinidae) in the United States - A Guide to their Identification, Distribution, and Biology Foreign Nonindigenous Carps and Minnows (Cyprinidae) in the United States - A Guide to their Identification, Distribution, and Biology
No abstract available.
Authors
Pamela J. Schofield, James D. Williams, Leo G. Nico, Pamela L. Fuller, Matthew R. Thomas
Non-USGS Publications**
Schofield, P.J. & D.H. Huge. 2011. Low-temperature tolerance of two non-native fishes (Hoplosternum littorale [Hancock 1828], Cichlasoma bimaculatum [Linnaeus 1758]) established in Florida. Florida Scientist 74: 73-83.
Schofield, P.J. & L.J. Chapman. 1999. Interactions between Nile perch, Lates niloticus, and other fishes in Lake Nabugabo, Uganda. Environmental Biology of Fishes 55(4): 343-358.
Schofield, P.J. & G.H. Burgess. 1997. Etmopterus robinsi: A new species of deep-water dogshark (Elasmobranchii, Etmopteridae) from the Caribbean and Western Atlantic with a redescription of E. hillianus. Bulletin of Marine Science 60(3): 1060-1073.
Kolar, C. and P. Schofield. 2009. Early detection and rapid response for nonnative marine fishes. Fisheries and Aquatic Bulletin (USGS) 9:7-9.
Schofield, P.J. 2003. Factors affecting the distribution and densities of two gobies (Microgobius gulosus and Gobiosoma robustum) in a lagoonal estuarine system (Florida Bay, USA). Doctoral dissertation, Department of Biological Sciences, University of Southern Mississippi.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
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