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Papers by Brian Jeffery

Research paper thumbnail of Spatial and Temporal Variability in Estuary Habitat Use by American Alligators

Estuaries and Coasts, Mar 10, 2016

Research paper thumbnail of Native and Nonnative Crocodilians of Florida

EDIS, 2013

Florida has two native species of crocodilians, the American alligator and the American crocodile... more Florida has two native species of crocodilians, the American alligator and the American crocodile. These federally protected species are easily confused with nonnative crocodilians found in south Florida, such as the spectacled caiman and the Nile crocodile. Some key features used to distinguish these animals are the shape of the head, the shape of the snout, and the pattern of nuchal scutes (bony plates in between head and shoulders). It is important to report all nonnative crocodilians so that researchers may quickly remove them in order to protect Florida’s native ecosystems. This 2-page fact sheet was written by Michiko A. Squires, Seth C. Farris, Brian M. Jeffery, and Frank J. Mazzotti, and published by the UF Department of Wildlife Ecology and Conservation, September 2013. http://edis.ifas.ufl.edu/uw380

Research paper thumbnail of Fluctuating water depths affect American alligator (Alligator mississippiensis) body condition in the Everglades, Florida, USA

Ecological Indicators, 2016

Research paper thumbnail of Implications of the 2013 Python Challenge®for Ecology and Management ofPython molorus bivittatus(Burmese Python) in Florida

Southeastern Naturalist, 2016

Research paper thumbnail of Intra-population variation in activity ranges, diel patterns, movement rates, and habitat use of American alligators in a subtropical estuary

Estuarine, Coastal and Shelf Science, 2013

Research paper thumbnail of Use of alligator hole abundance and occupancy rate as indicators for restoration of a human-altered wetland

Ecological Indicators, 2012

Research paper thumbnail of Fluctuating water depths affect American alligator (Alligator mississippiensis) body condition in the Everglades, Florida, USA

Ecological Indicators, Aug 1, 2016

Research paper thumbnail of Factors affecting individual foraging specialization and temporal diet stability across the range of a large "generalist" apex predator

Oecologia, Jan 3, 2015

Individual niche specialization (INS) is increasingly recognized as an important component of eco... more Individual niche specialization (INS) is increasingly recognized as an important component of ecological and evolutionary dynamics. However, most studies that have investigated INS have focused on the effects of niche width and inter- and intraspecific competition on INS in small-bodied species for short time periods, with less attention paid to INS in large-bodied reptilian predators and the effects of available prey types on INS. We investigated the prevalence, causes, and consequences of INS in foraging behaviors across different populations of American alligators (Alligator mississippiensis), the dominant aquatic apex predator across the southeast US, using stomach contents and stable isotopes. Gut contents revealed that, over the short term, although alligator populations occupied wide ranges of the INS spectrum, general patterns were apparent. Alligator populations inhabiting lakes exhibited lower INS than coastal populations, likely driven by variation in habitat type and ava...

Research paper thumbnail of Dry Years Decrease Abundance of American Alligators in the Florida Everglades

Research paper thumbnail of Home range and movements of American alligators (Alligator mississippiensis) in an estuary habitat

Animal Biotelemetry, 2014

Research paper thumbnail of Estimating Trends in Alligator Populations from Nightlight Survey Data

Wetlands, 2011

Nightlight surveys are commonly used to evaluate status and trends of crocodilian populations, bu... more Nightlight surveys are commonly used to evaluate status and trends of crocodilian populations, but imperfect detection caused by survey- and location-specific factors makes it difficult to draw population inferences accurately from uncorrected data. We used a two-stage hierarchical model comprising population abundance and detection probability to examine recent abundance trends of American alligators (Alligator mississippiensis) in subareas of Everglades wetlands

Research paper thumbnail of Body Condition of Morelet's Crocodiles ( Crocodylus moreletii ) from Northern Belize a

Journal of Herpetology, 2012

Research paper thumbnail of Alligators and crocodiles as indicators for restoration of Everglades ecosystems

Ecological Indicators, 2009

Research paper thumbnail of Herpetofaunal Inventories of the National Parks of South Florida and the Caribbean: Volume IV. Biscayne National Park

… Survey Open-File …, 2007

Research paper thumbnail of Intra-population variation in activity ranges, diel patterns, movement rates, and habitat use of American alligators in a subtropical estuary

Estuarine, Coastal and Shelf Science, 2013

Research paper thumbnail of Factors affecting individual foraging specialization and temporal diet stability across the range of a large "generalist" apex predator

Oecologia, Jan 3, 2015

Individual niche specialization (INS) is increasingly recognized as an important component of eco... more Individual niche specialization (INS) is increasingly recognized as an important component of ecological and evolutionary dynamics. However, most studies that have investigated INS have focused on the effects of niche width and inter- and intraspecific competition on INS in small-bodied species for short time periods, with less attention paid to INS in large-bodied reptilian predators and the effects of available prey types on INS. We investigated the prevalence, causes, and consequences of INS in foraging behaviors across different populations of American alligators (Alligator mississippiensis), the dominant aquatic apex predator across the southeast US, using stomach contents and stable isotopes. Gut contents revealed that, over the short term, although alligator populations occupied wide ranges of the INS spectrum, general patterns were apparent. Alligator populations inhabiting lakes exhibited lower INS than coastal populations, likely driven by variation in habitat type and ava...

Research paper thumbnail of Factors affecting individual foraging specialization and temporal diet stability across the range of a large "generalist" apex predator

Research paper thumbnail of Spatial and Temporal Variability in Estuary Habitat Use by American Alligators

Estuaries and Coasts, Mar 10, 2016

Research paper thumbnail of Native and Nonnative Crocodilians of Florida

EDIS, 2013

Florida has two native species of crocodilians, the American alligator and the American crocodile... more Florida has two native species of crocodilians, the American alligator and the American crocodile. These federally protected species are easily confused with nonnative crocodilians found in south Florida, such as the spectacled caiman and the Nile crocodile. Some key features used to distinguish these animals are the shape of the head, the shape of the snout, and the pattern of nuchal scutes (bony plates in between head and shoulders). It is important to report all nonnative crocodilians so that researchers may quickly remove them in order to protect Florida’s native ecosystems. This 2-page fact sheet was written by Michiko A. Squires, Seth C. Farris, Brian M. Jeffery, and Frank J. Mazzotti, and published by the UF Department of Wildlife Ecology and Conservation, September 2013. http://edis.ifas.ufl.edu/uw380

Research paper thumbnail of Fluctuating water depths affect American alligator (Alligator mississippiensis) body condition in the Everglades, Florida, USA

Ecological Indicators, 2016

Research paper thumbnail of Implications of the 2013 Python Challenge®for Ecology and Management ofPython molorus bivittatus(Burmese Python) in Florida

Southeastern Naturalist, 2016

Research paper thumbnail of Intra-population variation in activity ranges, diel patterns, movement rates, and habitat use of American alligators in a subtropical estuary

Estuarine, Coastal and Shelf Science, 2013

Research paper thumbnail of Use of alligator hole abundance and occupancy rate as indicators for restoration of a human-altered wetland

Ecological Indicators, 2012

Research paper thumbnail of Fluctuating water depths affect American alligator (Alligator mississippiensis) body condition in the Everglades, Florida, USA

Ecological Indicators, Aug 1, 2016

Research paper thumbnail of Factors affecting individual foraging specialization and temporal diet stability across the range of a large "generalist" apex predator

Oecologia, Jan 3, 2015

Individual niche specialization (INS) is increasingly recognized as an important component of eco... more Individual niche specialization (INS) is increasingly recognized as an important component of ecological and evolutionary dynamics. However, most studies that have investigated INS have focused on the effects of niche width and inter- and intraspecific competition on INS in small-bodied species for short time periods, with less attention paid to INS in large-bodied reptilian predators and the effects of available prey types on INS. We investigated the prevalence, causes, and consequences of INS in foraging behaviors across different populations of American alligators (Alligator mississippiensis), the dominant aquatic apex predator across the southeast US, using stomach contents and stable isotopes. Gut contents revealed that, over the short term, although alligator populations occupied wide ranges of the INS spectrum, general patterns were apparent. Alligator populations inhabiting lakes exhibited lower INS than coastal populations, likely driven by variation in habitat type and ava...

Research paper thumbnail of Dry Years Decrease Abundance of American Alligators in the Florida Everglades

Research paper thumbnail of Home range and movements of American alligators (Alligator mississippiensis) in an estuary habitat

Animal Biotelemetry, 2014

Research paper thumbnail of Estimating Trends in Alligator Populations from Nightlight Survey Data

Wetlands, 2011

Nightlight surveys are commonly used to evaluate status and trends of crocodilian populations, bu... more Nightlight surveys are commonly used to evaluate status and trends of crocodilian populations, but imperfect detection caused by survey- and location-specific factors makes it difficult to draw population inferences accurately from uncorrected data. We used a two-stage hierarchical model comprising population abundance and detection probability to examine recent abundance trends of American alligators (Alligator mississippiensis) in subareas of Everglades wetlands

Research paper thumbnail of Body Condition of Morelet's Crocodiles ( Crocodylus moreletii ) from Northern Belize a

Journal of Herpetology, 2012

Research paper thumbnail of Alligators and crocodiles as indicators for restoration of Everglades ecosystems

Ecological Indicators, 2009

Research paper thumbnail of Herpetofaunal Inventories of the National Parks of South Florida and the Caribbean: Volume IV. Biscayne National Park

… Survey Open-File …, 2007

Research paper thumbnail of Intra-population variation in activity ranges, diel patterns, movement rates, and habitat use of American alligators in a subtropical estuary

Estuarine, Coastal and Shelf Science, 2013

Research paper thumbnail of Factors affecting individual foraging specialization and temporal diet stability across the range of a large "generalist" apex predator

Oecologia, Jan 3, 2015

Individual niche specialization (INS) is increasingly recognized as an important component of eco... more Individual niche specialization (INS) is increasingly recognized as an important component of ecological and evolutionary dynamics. However, most studies that have investigated INS have focused on the effects of niche width and inter- and intraspecific competition on INS in small-bodied species for short time periods, with less attention paid to INS in large-bodied reptilian predators and the effects of available prey types on INS. We investigated the prevalence, causes, and consequences of INS in foraging behaviors across different populations of American alligators (Alligator mississippiensis), the dominant aquatic apex predator across the southeast US, using stomach contents and stable isotopes. Gut contents revealed that, over the short term, although alligator populations occupied wide ranges of the INS spectrum, general patterns were apparent. Alligator populations inhabiting lakes exhibited lower INS than coastal populations, likely driven by variation in habitat type and ava...

Research paper thumbnail of Factors affecting individual foraging specialization and temporal diet stability across the range of a large "generalist" apex predator

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