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Pamela J Schofield, Ph.D. (Former Employee)

Science and Products

Filter Total Items: 56

Risk assessment of chanchita Cichlasoma dimerus (Heckel, 1840), a newly identified non-native cichlid fish in Florida Risk assessment of chanchita Cichlasoma dimerus (Heckel, 1840), a newly identified non-native cichlid fish in Florida

The risk of a newly discovered non-native fish species in Florida (USA): Cichlasoma dimerus ([Heckel, 1840]; Family: Cichlidae) is assessed. Its tolerance to cold temperatures was experimentally evaluated and information on its biology and ecology was synthesized. In the cold-temperature tolerance experiment, temperature was lowered from 24 °C by increments of 1 °C per hour, mimicking a...
Authors
Mary Brown, Robert H. Robins, Pam Schofield
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Invasion frustration: Can biotic resistance explain the small geographic range of non-native croaking gourami Trichopsis vittata (Cuvier, 1831) in Florida, USA? Invasion frustration: Can biotic resistance explain the small geographic range of non-native croaking gourami Trichopsis vittata (Cuvier, 1831) in Florida, USA?

Croaking gourami Trichopsis vittata is a non-native fish species that has maintained a reproducing population in Florida, USA, since at least the 1970s. However, unlike most other non-native fishes in Florida, T. vittata has not spread beyond its very small (ca. 5 km²) range. We suspected the inability of T. vittata to colonize new habitats may be due to biotic resistance by the native...
Authors
Pam Schofield, Quenton M. Tuckett, Daniel Slone, Kristen Reaver, Jeffrey H. Hill
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Non-native Asian swamp eel, Monopterus albus/javanensis (Zuiew, 1973/Lacepede, 1800), responses to low temperatures Non-native Asian swamp eel, Monopterus albus/javanensis (Zuiew, 1973/Lacepede, 1800), responses to low temperatures

Asian swamp eel, Monopterus albus/javanensis [Zuiew, 1973/Lacepede 1800], has been established in the southeastern USA since at least 1994, yet little is known about its ability to survive low winter temperatures. We use standard thermal methodologies to quantify low temperature responses and provide a detailed description of swamp eel reactions to cold temperatures. When exposed to...
Authors
Ryan K. Saylor, Pam Schofield, Wayne A Bennett
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Expert bioblitzes facilitate non-native fish tracking and interagency partnerships Expert bioblitzes facilitate non-native fish tracking and interagency partnerships

Documenting the distribution and composition of non-native species populations can be challenging, especially when species cross jurisdictional boundaries that require interagency coordination. Herein I report the development of three tools that have been used in Florida over the past seven years to assist with tracking of non-native fishes: 1) an overarching organization to increase...
Authors
Pamela J. Schofield
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

A comparison of the Trojan Y Chromosome strategy to harvesting models for eradication of nonnative species A comparison of the Trojan Y Chromosome strategy to harvesting models for eradication of nonnative species

The Trojan Y Chromosome strategy (TYC) is a promising eradication method for biological control of nonnative species. The strategy works by manipulating the sex ratio of a population through the introduction of supermales that guarantee male offspring. In the current study, we compare the TYC method with a pure harvesting strategy. We also analyze a hybrid harvesting model that mirrors...
Authors
Jingjing Lyu, Pamela J. Schofield, Kristen Reaver, Matthew Beauregard, Rana D. Parshad
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Genetic Characterization of Non-Native African Jewelfish, Hemichromis letourneuxi Sauvage 1880, in Florida Genetic Characterization of Non-Native African Jewelfish, Hemichromis letourneuxi Sauvage 1880, in Florida

The African Jewelfish, Hemichromis letourneuxi, is an invasive, predatory cichlid fish introduced at least once to Florida. Its native range is in northern Africa. First encountered in Miami in the 1960s, it has since been found west and north within the State of Florida. It thrives in a wide range of aquatic habitats, including shallow, vegetated or rocky areas of canals, tidal creeks...
Authors
Natalia M. Belfiore, Pamela J. Schofield
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

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.

Filter Total Items: 20
Lionfish are spreading through the Western North Atlantic, Caribbean Sea, and the Gulf

Non-native Marine Fishes: Tracking Distributions with the USGS Nonindigenous Aquatic Species Database

WARC scientists work with local partners to verify and document sightings of non-native marine fishes.
By
Wetland and Aquatic Research Center
Non-native Marine Fishes: Tracking Distributions with the USGS Nonindigenous Aquatic Species Database

Non-native Marine Fishes: Tracking Distributions with the USGS Nonindigenous Aquatic Species Database

WARC scientists work with local partners to verify and document sightings of non-native marine fishes.
Learn More
Male Midas cichlid

Fish Slam May 2023

Fish Slam events link research institutions such as museums and universities with federal, state, and local government agencies that possess expertise and field equipment to collect nonnative fishes, providing unique access to specimens for these institutions.
By
Wetland and Aquatic Research Center
Fish Slam May 2023

Fish Slam May 2023

Fish Slam events link research institutions such as museums and universities with federal, state, and local government agencies that possess expertise and field equipment to collect nonnative fishes, providing unique access to specimens for these institutions.
Learn More
Mayan cichlid

Southwest Florida Fish Slam – Spring 2022

Forty-two fish biologists from seven organizations participated in a two-day Spring Fish Slam event in southwest Florida. Fourteen species of non-native fishes were collected or observed.
By
Ecosystems Mission Area, Biological Threats and Invasive Species Research Program, Land Management Research Program, Wetland and Aquatic Research Center
Southwest Florida Fish Slam – Spring 2022

Southwest Florida Fish Slam – Spring 2022

Forty-two fish biologists from seven organizations participated in a two-day Spring Fish Slam event in southwest Florida. Fourteen species of non-native fishes were collected or observed.
Learn More
Mayan cichlid, Mayaheros urophthalmus

Virtual Fish Slam - March 2021

In March 2021, USGS researchers and partners conducted the first-ever Virtual Fish Slam. The bi-annual Fish Slam event helps monitor new introductions and document range expansion of known non-native freshwater fishes.
By
Biological Threats and Invasive Species Research Program, Wetland and Aquatic Research Center
Virtual Fish Slam - March 2021

Virtual Fish Slam - March 2021

In March 2021, USGS researchers and partners conducted the first-ever Virtual Fish Slam. The bi-annual Fish Slam event helps monitor new introductions and document range expansion of known non-native freshwater fishes.
Learn More
Lionfish on Looe Reef, Florida Keys National Marine Sanctuary

Non-native Marine Fishes Observed or Collected in Florida Waters Non-native Marine Fishes Observed or Collected in Florida Waters

Below is a list of non-native marine fish species observed or collected in Florida. Each species is linked to a fact sheet with information on identification, biology and ecology. Maps indicate species occurrences linked to USGS-NAS data, which is available for download. Data may be downloaded directly from the map page of a particular species or you can contact Dr. Pam Schofield directly with...
Non-native Marine Fishes Observed or Collected in Florida Waters

Non-native Marine Fishes Observed or Collected in Florida Waters

Below is a list of non-native marine fish species observed or collected in Florida. Each species is linked to a fact sheet with information on identification, biology and ecology. Maps indicate species occurrences linked to USGS-NAS data, which is available for download. Data may be downloaded directly from the map page of a particular species or you can contact Dr. Pam Schofield directly with...
Learn More
Chocolate surgeonfish spotted in Florida waters

Non-native Marine Fishes in Florida - By Family Non-native Marine Fishes in Florida - By Family

Below are families of non-native marine fish species observed or collected in Florida. Species within each family are linked to a fact sheet with information on identification, biology and ecology. Maps indicate species occurrences linked to USGS-NAS data, which is available for download. Data may be downloaded directly from the map page of a particular species or you can contact Dr. Pam Schofield...
Non-native Marine Fishes in Florida - By Family

Non-native Marine Fishes in Florida - By Family

Below are families of non-native marine fish species observed or collected in Florida. Species within each family are linked to a fact sheet with information on identification, biology and ecology. Maps indicate species occurrences linked to USGS-NAS data, which is available for download. Data may be downloaded directly from the map page of a particular species or you can contact Dr. Pam Schofield...
Learn More
Filter Total Items: 16

Risk assessment of chanchita Cichlasoma dimerus (Heckel, 1840), a newly identified non-native cichlid fish in Florida Risk assessment of chanchita Cichlasoma dimerus (Heckel, 1840), a newly identified non-native cichlid fish in Florida

Cichlasoma dimerus was only recently discovered in Florida and little is known of its dispersal abilities and potential impacts. Many factors likely contribute to the variability in establishment and spread of non-native fishes in Florida, including biotic (e.g., predation and competition) and abiotic variables (e.g., cold tolerance, low-oxygen tolerance). Of the abiotic variables, cold...
By
Wetland and Aquatic Research Center

Non-native Asian swamp eel, Monopterus albus/javanensis (Zuiew, 1973/Lacepede, 1800), responses to low temperatures Non-native Asian swamp eel, Monopterus albus/javanensis (Zuiew, 1973/Lacepede, 1800), responses to low temperatures

Asian swamp eel, Monopterus albus/javanensis [Zuiew, 1973/Lacepede, 1800], has been established in the southeastern USA since at least 1994, yet little is known about its ability to survive low winter temperatures. We use standard thermal methodologies to quantify low-temperature responses and provide a detailed description of swamp eel reactions to cold temperatures. When exposed to...
By
Wetland and Aquatic Research Center

Trojan Y chromosome strategy for eradication of non-native species data Trojan Y chromosome strategy for eradication of non-native species data

The Trojan Y Chromosome (TYC) strategy is a promising eradication method for biological control of non-native species. The strategy works by manipulating the sex ratio of a population through the introduction of supermales that guarantee male offspring.
By
Wetland and Aquatic Research Center

Can biotic resistance explain the small geographic range of non-native croaking gourami Trichopsis vittata (Cuvier, 1831) in Florida, USA? Can biotic resistance explain the small geographic range of non-native croaking gourami Trichopsis vittata (Cuvier, 1831) in Florida, USA?

In this report, we evaluate this hypothesis for croaking gourami Trichopsis vittata, a non-native species that has established a reproducing population, but has not successfully spread beyond its very small (5 km2) range. We suspected the inability of T. vittata to colonize new habitats may be due to biotic resistance by the native eastern mosquitofish Gambusia holbrooki.
By
Wetland and Aquatic Research Center

Non-native marine fishes in Florida: updated checklist, population status and early detection/rapid response data Non-native marine fishes in Florida: updated checklist, population status and early detection/rapid response data

It has been ten years since the last comprehensive assessment of non-native marine fishes in Florida. Herein, we report sightings of 41 species from Florida coastal waters since the earliest sighting in 1984.
By
Wetland and Aquatic Research Center

Bioblitzes facilitate non-native fish tracking and interagency partnerships data Bioblitzes facilitate non-native fish tracking and interagency partnerships data

Maintaining up-to-date information on non-native organisms' distributions and species composition can be difficult, especially when species cross jurisdictional boundaries that require interagency coordination. Herein I report on the use of tools that have been used in Florida over the past seven years to assist with tracking of non-native fishes. Ten Fish Slams, where professional...
By
Wetland and Aquatic Research Center
Walking catfish
Walking catfish
Walking catfish
Walking catfish

Walking catfish

Walking catfish

Cayla Morningstar (USGS) and Howard Jelks (USGS) show off a walking catfish, Clarias batrachus, during the March 2022 Fish Slam. Photo credit USGS

By
Wetland and Aquatic Research Center , Wetland and Aquatic Research Center
Walking catfish

Walking catfish

Walking catfish

Cayla Morningstar (USGS) and Howard Jelks (USGS) show off a walking catfish, Clarias batrachus, during the March 2022 Fish Slam. Photo credit USGS

By
Wetland and Aquatic Research Center , Wetland and Aquatic Research Center
USGS and Partners Team Up to Track Down Nonnative and Invasive Fishes in South Florida

USGS and Partners Team Up to Track Down Nonnative and Invasive Fishes in South Florida

The Fish Slam event discovered two nonnative fish species never seen before in Big Cypress National Preserve.

 

 

Read Article
Blotched Foxface Fish Found in Florida Waters

Blotched Foxface Fish Found in Florida Waters

Fish Marks 36th Non-Native Marine Fish Species Found in State

Read Article
Taming the Lion(fish)

Taming the Lion(fish)

Genetics and tracking helps USGS researchers learn where the invasive fish are now – and where they may go next.

Read Article
Extent and Speed of Lionfish Spread Unprecedented—Invasive Marine Fish May Stress Reefs

Extent and Speed of Lionfish Spread Unprecedented—Invasive Marine Fish May Stress Reefs

The rapid spread of lionfishes along the U.S. eastern seaboard, Gulf of America, and Caribbean is the first documented case of a nonnative marine fish...

Read Article

Science and Products

Filter Total Items: 56

Risk assessment of chanchita Cichlasoma dimerus (Heckel, 1840), a newly identified non-native cichlid fish in Florida Risk assessment of chanchita Cichlasoma dimerus (Heckel, 1840), a newly identified non-native cichlid fish in Florida

The risk of a newly discovered non-native fish species in Florida (USA): Cichlasoma dimerus ([Heckel, 1840]; Family: Cichlidae) is assessed. Its tolerance to cold temperatures was experimentally evaluated and information on its biology and ecology was synthesized. In the cold-temperature tolerance experiment, temperature was lowered from 24 °C by increments of 1 °C per hour, mimicking a...
Authors
Mary Brown, Robert H. Robins, Pam Schofield
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Invasion frustration: Can biotic resistance explain the small geographic range of non-native croaking gourami Trichopsis vittata (Cuvier, 1831) in Florida, USA? Invasion frustration: Can biotic resistance explain the small geographic range of non-native croaking gourami Trichopsis vittata (Cuvier, 1831) in Florida, USA?

Croaking gourami Trichopsis vittata is a non-native fish species that has maintained a reproducing population in Florida, USA, since at least the 1970s. However, unlike most other non-native fishes in Florida, T. vittata has not spread beyond its very small (ca. 5 km²) range. We suspected the inability of T. vittata to colonize new habitats may be due to biotic resistance by the native...
Authors
Pam Schofield, Quenton M. Tuckett, Daniel Slone, Kristen Reaver, Jeffrey H. Hill
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Non-native Asian swamp eel, Monopterus albus/javanensis (Zuiew, 1973/Lacepede, 1800), responses to low temperatures Non-native Asian swamp eel, Monopterus albus/javanensis (Zuiew, 1973/Lacepede, 1800), responses to low temperatures

Asian swamp eel, Monopterus albus/javanensis [Zuiew, 1973/Lacepede 1800], has been established in the southeastern USA since at least 1994, yet little is known about its ability to survive low winter temperatures. We use standard thermal methodologies to quantify low temperature responses and provide a detailed description of swamp eel reactions to cold temperatures. When exposed to...
Authors
Ryan K. Saylor, Pam Schofield, Wayne A Bennett
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Expert bioblitzes facilitate non-native fish tracking and interagency partnerships Expert bioblitzes facilitate non-native fish tracking and interagency partnerships

Documenting the distribution and composition of non-native species populations can be challenging, especially when species cross jurisdictional boundaries that require interagency coordination. Herein I report the development of three tools that have been used in Florida over the past seven years to assist with tracking of non-native fishes: 1) an overarching organization to increase...
Authors
Pamela J. Schofield
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

A comparison of the Trojan Y Chromosome strategy to harvesting models for eradication of nonnative species A comparison of the Trojan Y Chromosome strategy to harvesting models for eradication of nonnative species

The Trojan Y Chromosome strategy (TYC) is a promising eradication method for biological control of nonnative species. The strategy works by manipulating the sex ratio of a population through the introduction of supermales that guarantee male offspring. In the current study, we compare the TYC method with a pure harvesting strategy. We also analyze a hybrid harvesting model that mirrors...
Authors
Jingjing Lyu, Pamela J. Schofield, Kristen Reaver, Matthew Beauregard, Rana D. Parshad
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Genetic Characterization of Non-Native African Jewelfish, Hemichromis letourneuxi Sauvage 1880, in Florida Genetic Characterization of Non-Native African Jewelfish, Hemichromis letourneuxi Sauvage 1880, in Florida

The African Jewelfish, Hemichromis letourneuxi, is an invasive, predatory cichlid fish introduced at least once to Florida. Its native range is in northern Africa. First encountered in Miami in the 1960s, it has since been found west and north within the State of Florida. It thrives in a wide range of aquatic habitats, including shallow, vegetated or rocky areas of canals, tidal creeks...
Authors
Natalia M. Belfiore, Pamela J. Schofield
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

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.

Filter Total Items: 20
Lionfish are spreading through the Western North Atlantic, Caribbean Sea, and the Gulf

Non-native Marine Fishes: Tracking Distributions with the USGS Nonindigenous Aquatic Species Database

WARC scientists work with local partners to verify and document sightings of non-native marine fishes.
By
Wetland and Aquatic Research Center
Non-native Marine Fishes: Tracking Distributions with the USGS Nonindigenous Aquatic Species Database

Non-native Marine Fishes: Tracking Distributions with the USGS Nonindigenous Aquatic Species Database

WARC scientists work with local partners to verify and document sightings of non-native marine fishes.
Learn More
Male Midas cichlid

Fish Slam May 2023

Fish Slam events link research institutions such as museums and universities with federal, state, and local government agencies that possess expertise and field equipment to collect nonnative fishes, providing unique access to specimens for these institutions.
By
Wetland and Aquatic Research Center
Fish Slam May 2023

Fish Slam May 2023

Fish Slam events link research institutions such as museums and universities with federal, state, and local government agencies that possess expertise and field equipment to collect nonnative fishes, providing unique access to specimens for these institutions.
Learn More
Mayan cichlid

Southwest Florida Fish Slam – Spring 2022

Forty-two fish biologists from seven organizations participated in a two-day Spring Fish Slam event in southwest Florida. Fourteen species of non-native fishes were collected or observed.
By
Ecosystems Mission Area, Biological Threats and Invasive Species Research Program, Land Management Research Program, Wetland and Aquatic Research Center
Southwest Florida Fish Slam – Spring 2022

Southwest Florida Fish Slam – Spring 2022

Forty-two fish biologists from seven organizations participated in a two-day Spring Fish Slam event in southwest Florida. Fourteen species of non-native fishes were collected or observed.
Learn More
Mayan cichlid, Mayaheros urophthalmus

Virtual Fish Slam - March 2021

In March 2021, USGS researchers and partners conducted the first-ever Virtual Fish Slam. The bi-annual Fish Slam event helps monitor new introductions and document range expansion of known non-native freshwater fishes.
By
Biological Threats and Invasive Species Research Program, Wetland and Aquatic Research Center
Virtual Fish Slam - March 2021

Virtual Fish Slam - March 2021

In March 2021, USGS researchers and partners conducted the first-ever Virtual Fish Slam. The bi-annual Fish Slam event helps monitor new introductions and document range expansion of known non-native freshwater fishes.
Learn More
Lionfish on Looe Reef, Florida Keys National Marine Sanctuary

Non-native Marine Fishes Observed or Collected in Florida Waters Non-native Marine Fishes Observed or Collected in Florida Waters

Below is a list of non-native marine fish species observed or collected in Florida. Each species is linked to a fact sheet with information on identification, biology and ecology. Maps indicate species occurrences linked to USGS-NAS data, which is available for download. Data may be downloaded directly from the map page of a particular species or you can contact Dr. Pam Schofield directly with...
Non-native Marine Fishes Observed or Collected in Florida Waters

Non-native Marine Fishes Observed or Collected in Florida Waters

Below is a list of non-native marine fish species observed or collected in Florida. Each species is linked to a fact sheet with information on identification, biology and ecology. Maps indicate species occurrences linked to USGS-NAS data, which is available for download. Data may be downloaded directly from the map page of a particular species or you can contact Dr. Pam Schofield directly with...
Learn More
Chocolate surgeonfish spotted in Florida waters

Non-native Marine Fishes in Florida - By Family Non-native Marine Fishes in Florida - By Family

Below are families of non-native marine fish species observed or collected in Florida. Species within each family are linked to a fact sheet with information on identification, biology and ecology. Maps indicate species occurrences linked to USGS-NAS data, which is available for download. Data may be downloaded directly from the map page of a particular species or you can contact Dr. Pam Schofield...
Non-native Marine Fishes in Florida - By Family

Non-native Marine Fishes in Florida - By Family

Below are families of non-native marine fish species observed or collected in Florida. Species within each family are linked to a fact sheet with information on identification, biology and ecology. Maps indicate species occurrences linked to USGS-NAS data, which is available for download. Data may be downloaded directly from the map page of a particular species or you can contact Dr. Pam Schofield...
Learn More
Filter Total Items: 16

Risk assessment of chanchita Cichlasoma dimerus (Heckel, 1840), a newly identified non-native cichlid fish in Florida Risk assessment of chanchita Cichlasoma dimerus (Heckel, 1840), a newly identified non-native cichlid fish in Florida

Cichlasoma dimerus was only recently discovered in Florida and little is known of its dispersal abilities and potential impacts. Many factors likely contribute to the variability in establishment and spread of non-native fishes in Florida, including biotic (e.g., predation and competition) and abiotic variables (e.g., cold tolerance, low-oxygen tolerance). Of the abiotic variables, cold...
By
Wetland and Aquatic Research Center

Non-native Asian swamp eel, Monopterus albus/javanensis (Zuiew, 1973/Lacepede, 1800), responses to low temperatures Non-native Asian swamp eel, Monopterus albus/javanensis (Zuiew, 1973/Lacepede, 1800), responses to low temperatures

Asian swamp eel, Monopterus albus/javanensis [Zuiew, 1973/Lacepede, 1800], has been established in the southeastern USA since at least 1994, yet little is known about its ability to survive low winter temperatures. We use standard thermal methodologies to quantify low-temperature responses and provide a detailed description of swamp eel reactions to cold temperatures. When exposed to...
By
Wetland and Aquatic Research Center

Trojan Y chromosome strategy for eradication of non-native species data Trojan Y chromosome strategy for eradication of non-native species data

The Trojan Y Chromosome (TYC) strategy is a promising eradication method for biological control of non-native species. The strategy works by manipulating the sex ratio of a population through the introduction of supermales that guarantee male offspring.
By
Wetland and Aquatic Research Center

Can biotic resistance explain the small geographic range of non-native croaking gourami Trichopsis vittata (Cuvier, 1831) in Florida, USA? Can biotic resistance explain the small geographic range of non-native croaking gourami Trichopsis vittata (Cuvier, 1831) in Florida, USA?

In this report, we evaluate this hypothesis for croaking gourami Trichopsis vittata, a non-native species that has established a reproducing population, but has not successfully spread beyond its very small (5 km2) range. We suspected the inability of T. vittata to colonize new habitats may be due to biotic resistance by the native eastern mosquitofish Gambusia holbrooki.
By
Wetland and Aquatic Research Center

Non-native marine fishes in Florida: updated checklist, population status and early detection/rapid response data Non-native marine fishes in Florida: updated checklist, population status and early detection/rapid response data

It has been ten years since the last comprehensive assessment of non-native marine fishes in Florida. Herein, we report sightings of 41 species from Florida coastal waters since the earliest sighting in 1984.
By
Wetland and Aquatic Research Center

Bioblitzes facilitate non-native fish tracking and interagency partnerships data Bioblitzes facilitate non-native fish tracking and interagency partnerships data

Maintaining up-to-date information on non-native organisms' distributions and species composition can be difficult, especially when species cross jurisdictional boundaries that require interagency coordination. Herein I report on the use of tools that have been used in Florida over the past seven years to assist with tracking of non-native fishes. Ten Fish Slams, where professional...
By
Wetland and Aquatic Research Center
Walking catfish
Walking catfish
Walking catfish
Walking catfish

Walking catfish

Walking catfish

Cayla Morningstar (USGS) and Howard Jelks (USGS) show off a walking catfish, Clarias batrachus, during the March 2022 Fish Slam. Photo credit USGS

By
Wetland and Aquatic Research Center , Wetland and Aquatic Research Center
Walking catfish

Walking catfish

Walking catfish

Cayla Morningstar (USGS) and Howard Jelks (USGS) show off a walking catfish, Clarias batrachus, during the March 2022 Fish Slam. Photo credit USGS

By
Wetland and Aquatic Research Center , Wetland and Aquatic Research Center
USGS and Partners Team Up to Track Down Nonnative and Invasive Fishes in South Florida

USGS and Partners Team Up to Track Down Nonnative and Invasive Fishes in South Florida

The Fish Slam event discovered two nonnative fish species never seen before in Big Cypress National Preserve.

 

 

Read Article
Blotched Foxface Fish Found in Florida Waters

Blotched Foxface Fish Found in Florida Waters

Fish Marks 36th Non-Native Marine Fish Species Found in State

Read Article
Taming the Lion(fish)

Taming the Lion(fish)

Genetics and tracking helps USGS researchers learn where the invasive fish are now – and where they may go next.

Read Article
Extent and Speed of Lionfish Spread Unprecedented—Invasive Marine Fish May Stress Reefs

Extent and Speed of Lionfish Spread Unprecedented—Invasive Marine Fish May Stress Reefs

The rapid spread of lionfishes along the U.S. eastern seaboard, Gulf of America, and Caribbean is the first documented case of a nonnative marine fish...

Read Article
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