Pamela J Schofield, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 56
Predation vulnerability of two gobies (Microgobius gulosus; Gobiosoma robustum) is not related to presence of seagrass
Abstract not supplied at this time
Authors
P. J. Schofield
Influence of salinity, competition and food supply on the growth of Gobiosoma robustum and Microgobius gulosus from Florida Bay, U. S. A.
The code Gobiosoma robustum and clown Microgobius gulosus gobies were grown in the laboratory over 27 days at two salinities (5 and 35), two food levels [low (a fixed proportion of initial mass) and high (saturation)] and both with and without the presence of the other species. Both species exhibited greatest growth at the high food level and the low (5) salinity. Neither species was affected by t
Authors
P. J. Schofield
Fish faunal resurgence in Lake Nabugabo, East Africa
In Lake Nabugabo, Uganda, a small satellite of the equatorial Lake Victoria, approximately 50% of the indigenous fish species disappeared from the open waters subsequent to establishment of the introduced predatory Nile perch ( Lates niloticus ). However, several of these species persisted in wetland refugia. Over the past decade, Nile perch in Lake Nabugabo have been intensively fished. Herein
Authors
L.J. Chapman, Colin A. Chapman, P. J. Schofield, J.P. Olowo, L.S. Kaufman, O. Seehausen, R. Ogutu-Ohwayo.
Habitat selection of two gobies (Microgobius gulosus, Gobiosoma robustum): influence of structural complexity, competitive interactions and presence of a predator
Herein I compare the relative importance of preference for structurally complex habitat against avoidance of competitors and predators in two benthic fishes common in the Gulf of Mexico. The code goby Gobiosoma robustum Ginsburg and clown goby Microgobius gulosus (Girard) are common, ecologically similar fishes found throughout the Gulf of Mexico and in the southeastern Atlantic Ocean. In Florida
Authors
P. J. Schofield
Salinity tolerance of two gobies (Microgobius gulosus, Gobiosoma robustum) in Florida Bay (USA)
No abstract available.
Authors
P. J. Schofield
Habitat selection of the channel darter, Percina (Cottogaster) copelandi, a surrogate for the imperiled pearl darter, Percina aurora
Percina (Cottogaster) aurora is an imperiled species under consideration for listing by the U.S. Fish and Wildlife Service. To better understand habitat use of P. aurora, we studied a related and more abundant Cottogasterspecies, Percina copelandi, from the Ouachita River, Arkansas. We used a laboratory stream system to examine mesohabitat selection (pools versus riffles) and microhabitat selectio
Authors
Pamela J. Schofield, Stephen T. Ross
Hypoxia tolerance of introduced Nile perch: Implications for survival of indigenous fishes in the Lake Victoria basin
The introduction of predatory Nile perch (Lates niloticus) into the Lake Victoria basin coincided with a dramatic decline in fish diversity. However, remnant populations of indigenous fishes persist in lagoons and satellite lakes separated from the main lakes by extensive areas of swamp, while other indigenous species find refuge in ecotonal areas at edges of marginal swamps in the main lakes. Low
Authors
Pamela J. Schofield, Lauren J. Chapman
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
Predation vulnerability of two gobies (Microgobius gulosus; Gobiosoma robustum) is not related to presence of seagrass
Abstract not supplied at this time
Authors
P. J. Schofield
Influence of salinity, competition and food supply on the growth of Gobiosoma robustum and Microgobius gulosus from Florida Bay, U. S. A.
The code Gobiosoma robustum and clown Microgobius gulosus gobies were grown in the laboratory over 27 days at two salinities (5 and 35), two food levels [low (a fixed proportion of initial mass) and high (saturation)] and both with and without the presence of the other species. Both species exhibited greatest growth at the high food level and the low (5) salinity. Neither species was affected by t
Authors
P. J. Schofield
Fish faunal resurgence in Lake Nabugabo, East Africa
In Lake Nabugabo, Uganda, a small satellite of the equatorial Lake Victoria, approximately 50% of the indigenous fish species disappeared from the open waters subsequent to establishment of the introduced predatory Nile perch ( Lates niloticus ). However, several of these species persisted in wetland refugia. Over the past decade, Nile perch in Lake Nabugabo have been intensively fished. Herein
Authors
L.J. Chapman, Colin A. Chapman, P. J. Schofield, J.P. Olowo, L.S. Kaufman, O. Seehausen, R. Ogutu-Ohwayo.
Habitat selection of two gobies (Microgobius gulosus, Gobiosoma robustum): influence of structural complexity, competitive interactions and presence of a predator
Herein I compare the relative importance of preference for structurally complex habitat against avoidance of competitors and predators in two benthic fishes common in the Gulf of Mexico. The code goby Gobiosoma robustum Ginsburg and clown goby Microgobius gulosus (Girard) are common, ecologically similar fishes found throughout the Gulf of Mexico and in the southeastern Atlantic Ocean. In Florida
Authors
P. J. Schofield
Salinity tolerance of two gobies (Microgobius gulosus, Gobiosoma robustum) in Florida Bay (USA)
No abstract available.
Authors
P. J. Schofield
Habitat selection of the channel darter, Percina (Cottogaster) copelandi, a surrogate for the imperiled pearl darter, Percina aurora
Percina (Cottogaster) aurora is an imperiled species under consideration for listing by the U.S. Fish and Wildlife Service. To better understand habitat use of P. aurora, we studied a related and more abundant Cottogasterspecies, Percina copelandi, from the Ouachita River, Arkansas. We used a laboratory stream system to examine mesohabitat selection (pools versus riffles) and microhabitat selectio
Authors
Pamela J. Schofield, Stephen T. Ross
Hypoxia tolerance of introduced Nile perch: Implications for survival of indigenous fishes in the Lake Victoria basin
The introduction of predatory Nile perch (Lates niloticus) into the Lake Victoria basin coincided with a dramatic decline in fish diversity. However, remnant populations of indigenous fishes persist in lagoons and satellite lakes separated from the main lakes by extensive areas of swamp, while other indigenous species find refuge in ecotonal areas at edges of marginal swamps in the main lakes. Low
Authors
Pamela J. Schofield, Lauren J. Chapman
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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