Allan O'Connell, Jr., Ph.D. (Former Employee)
Science and Products
Filter Total Items: 58
Fitting statistical distributions to sea duck count data: implications for survey design and abundance estimation Fitting statistical distributions to sea duck count data: implications for survey design and abundance estimation
Determining appropriate statistical distributions for modeling animal count data is important for accurate estimation of abundance, distribution, and trends. In the case of sea ducks along the U.S. Atlantic coast, managers want to estimate local and regional abundance to detect and track population declines, to define areas of high and low use, and to predict the impact of future habitat...
Authors
Elise F. Zipkin, Jeffery B. Leirness, Brian P. Kinlan, Allan F. O’Connell, Emily D. Silverman
A spatial mark–resight model augmented with telemetry data A spatial mark–resight model augmented with telemetry data
Abundance and population density are fundamental pieces of information for population ecology and species conservation, but they are difficult to estimate for rare and elusive species. Mark-resight models are popular for estimating population abundance because they are less invasive and expensive than traditional mark-recapture. However, density estimation using mark-resight is difficult...
Authors
Rachel Sollmann, Beth Gardner, Arielle W. Parsons, Jessica J. Stocking, Brett T. McClintock, Theodore R. Simons, Kenneth H. Pollock, Allan F. O’Connell
Comparison of five modelling techniques to predict the spatial distribution and abundance of seabirds Comparison of five modelling techniques to predict the spatial distribution and abundance of seabirds
Knowledge about the spatial distribution of seabirds at sea is important for conservation. During marine conservation planning, logistical constraints preclude seabird surveys covering the complete area of interest and spatial distribution of seabirds is frequently inferred from predictive statistical models. Increasingly complex models are available to relate the distribution and...
Authors
Allan F. O’Connell, Beth Gardner, Steffen Oppel, Ana Meirinho, Iván Ramírez, Peter I. Miller, Maite Louzao
Variation in wind and piscivorous predator fields affecting the survival of Atlantic salmon, Salmo salar, in the Gulf of Maine Variation in wind and piscivorous predator fields affecting the survival of Atlantic salmon, Salmo salar, in the Gulf of Maine
Observations relevant to the North American stock complex of Atlantic salmon, Salmo salar L., suggest that marine mortality is influenced by variation in predation pressure affecting post‐smolts during the first months at sea. This hypothesis was tested for Gulf of Maine (GOM) stocks by examining wind pseudostress and the distribution of piscivorous predator fields potentially affecting...
Authors
K.D. Friedland, J.P. Manning, Jason S. Link, J.R. Gilbert, A.T. Gilbert, A.F. O'Connell
Statistical analyses to support guidelines for marine avian sampling. Final report Statistical analyses to support guidelines for marine avian sampling. Final report
Interest in development of offshore renewable energy facilities has led to a need for high-quality, statistically robust information on marine wildlife distributions. A practical approach is described to estimate the amount of sampling effort required to have sufficient statistical power to identify species-specific “hotspots” and “coldspots” of marine bird abundance and occurrence in an...
Authors
Brian P. Kinlan, Elise Zipkin, Allan F. O’Connell, Chris Caldow
Demographics, diet, movements, and survival of an isolated, unmanaged raccoon Procyon lotor (Procyonidae, Carnivora) population on the Outer Banks of North Carolina Demographics, diet, movements, and survival of an isolated, unmanaged raccoon Procyon lotor (Procyonidae, Carnivora) population on the Outer Banks of North Carolina
Raccoons (Procyon lotor) are highly adaptable meso-carnivores that inhabit many environments, including the Atlantic barrier islands, where their role as predators of declining, beach-nesting bird and turtle species is of particular interest. Population models that improve our understanding of predator-prey dynamics are receiving increasing attention in the literature; however, their...
Authors
Arielle Waldstein Parsons, Theodore R. Simons, Allan F. O’Connell, Michael K. Stoskopf
Science and Products
Filter Total Items: 58
Fitting statistical distributions to sea duck count data: implications for survey design and abundance estimation Fitting statistical distributions to sea duck count data: implications for survey design and abundance estimation
Determining appropriate statistical distributions for modeling animal count data is important for accurate estimation of abundance, distribution, and trends. In the case of sea ducks along the U.S. Atlantic coast, managers want to estimate local and regional abundance to detect and track population declines, to define areas of high and low use, and to predict the impact of future habitat...
Authors
Elise F. Zipkin, Jeffery B. Leirness, Brian P. Kinlan, Allan F. O’Connell, Emily D. Silverman
A spatial mark–resight model augmented with telemetry data A spatial mark–resight model augmented with telemetry data
Abundance and population density are fundamental pieces of information for population ecology and species conservation, but they are difficult to estimate for rare and elusive species. Mark-resight models are popular for estimating population abundance because they are less invasive and expensive than traditional mark-recapture. However, density estimation using mark-resight is difficult...
Authors
Rachel Sollmann, Beth Gardner, Arielle W. Parsons, Jessica J. Stocking, Brett T. McClintock, Theodore R. Simons, Kenneth H. Pollock, Allan F. O’Connell
Comparison of five modelling techniques to predict the spatial distribution and abundance of seabirds Comparison of five modelling techniques to predict the spatial distribution and abundance of seabirds
Knowledge about the spatial distribution of seabirds at sea is important for conservation. During marine conservation planning, logistical constraints preclude seabird surveys covering the complete area of interest and spatial distribution of seabirds is frequently inferred from predictive statistical models. Increasingly complex models are available to relate the distribution and...
Authors
Allan F. O’Connell, Beth Gardner, Steffen Oppel, Ana Meirinho, Iván Ramírez, Peter I. Miller, Maite Louzao
Variation in wind and piscivorous predator fields affecting the survival of Atlantic salmon, Salmo salar, in the Gulf of Maine Variation in wind and piscivorous predator fields affecting the survival of Atlantic salmon, Salmo salar, in the Gulf of Maine
Observations relevant to the North American stock complex of Atlantic salmon, Salmo salar L., suggest that marine mortality is influenced by variation in predation pressure affecting post‐smolts during the first months at sea. This hypothesis was tested for Gulf of Maine (GOM) stocks by examining wind pseudostress and the distribution of piscivorous predator fields potentially affecting...
Authors
K.D. Friedland, J.P. Manning, Jason S. Link, J.R. Gilbert, A.T. Gilbert, A.F. O'Connell
Statistical analyses to support guidelines for marine avian sampling. Final report Statistical analyses to support guidelines for marine avian sampling. Final report
Interest in development of offshore renewable energy facilities has led to a need for high-quality, statistically robust information on marine wildlife distributions. A practical approach is described to estimate the amount of sampling effort required to have sufficient statistical power to identify species-specific “hotspots” and “coldspots” of marine bird abundance and occurrence in an...
Authors
Brian P. Kinlan, Elise Zipkin, Allan F. O’Connell, Chris Caldow
Demographics, diet, movements, and survival of an isolated, unmanaged raccoon Procyon lotor (Procyonidae, Carnivora) population on the Outer Banks of North Carolina Demographics, diet, movements, and survival of an isolated, unmanaged raccoon Procyon lotor (Procyonidae, Carnivora) population on the Outer Banks of North Carolina
Raccoons (Procyon lotor) are highly adaptable meso-carnivores that inhabit many environments, including the Atlantic barrier islands, where their role as predators of declining, beach-nesting bird and turtle species is of particular interest. Population models that improve our understanding of predator-prey dynamics are receiving increasing attention in the literature; however, their...
Authors
Arielle Waldstein Parsons, Theodore R. Simons, Allan F. O’Connell, Michael K. Stoskopf