James J. Pottie’s scientific contributions

What is this page?


This page lists works of an author who doesn't have a ResearchGate profile or hasn't added the works to their profile yet. It is automatically generated from public (personal) data to further our legitimate goal of comprehensive and accurate scientific recordkeeping. If you are this author and want this page removed, please let us know.

Publications (2)


Figure 1. Aberdeen Proving Ground, Baltimore and Harford Counties, Maryland. 
Recovery of Breeding Bald Eagles on Aberdeen Proving Ground, Maryland
  • Article
  • Full-text available

March 2014

·

424 Reads

·

2 Citations

·

·

John T. Paul

·

James J. Pottie

We conducted annual aerial surveys (1991-2011) for breeding Bald Eagles (Haliaeetus leucocephalus) within Aberdeen Proving Ground (APG), a 350-km2 military installation located along the northwestern shoreline of the upper Chesapeake Bay in Maryland. The population increased exponentially from 1 pair in 1977 to 58 pairs in 2011 with an average doubling time of 5.8 years. This rate was higher than that documented for the broader Chesapeake Bay and is comparable to the highest reported throughout the species range. Annual population increase was highly variable and exhibited no indication of any systematic decline. A total of 646 chicks were produced from 464 breeding attempts during this period. The population has exhibited tremendous forward momentum such that more than 50% of young produced over the 21-year period were produced in the last 6 years. Average success rate was high (79.8%) and reproductive rates exceeded conservation targets in nearly all years. Due to the expansion of urban development throughout the Chesapeake Bay watershed, APG plays an increasingly important role in the recovery and maintenance of the Chesapeake Bay Bald Eagle population.

Download

Table 1 . Bald Eagle injuries and mortalities associated with electrical lines on Aberdeen Proving Ground, MD, 1985- 2007. Mortality events were significantly higher than expected for exposed lines within 1 km of shorelines.
Factors Contributing to Bald Eagle Electrocutions and Line Collisions on Aberdeen Proving Ground, Maryland

March 2009

·

342 Reads

·

30 Citations

Journal of Raptor Research

·

·

John T. Paul

·

[...]

·

James Pottie

Resumen Evaluamos los factores que contribuyen a las electrocuciones y las colisiones con los tendidos electricos de Haliaeetus leucocephalus en Aberdeen Proving Ground, un area importante de concentracion de aguilas en la bahia de Chesapeake. Durante el periodo de 1985 a 2007, documentamos la ubicacion de 62 aguilas muertas o recuperadas heridas bajo tendidos electricos. Usando un diseno de dos vias simple, superpusimos la mortalidad de las aguilas sobre segmentos del tendido, clasificados por su proximidad a la costa y por la altura de la vegetacion circundante. Documentamos una mortalidad significativamente mayor asociada con los tendidos mas cercanos a la costa comparada con los tendidos del interior que lo esperado con base en la longitud relativa del tendido (χ2 = 119.71, gl = 2, P < 0.001). Adicionalmente, el numero de muertes de aguilas asociado con los tendidos expuestos (sin vegetacion que los oculte) fue mayor que el esperado con base a la longitud relativa del tendido (χ2 = 11.54, gl = ...

Citations (2)


... The area experiences an average summer high and winter low temperature of 30.68C and À4.68C, respectively, and receives an average of 114.5 cm of rainfall annually. This area supports eagles during fall and winter (Eakle et al. 2015) and a large breeding population (Watts et al. 2014). The southwestern portion of the study area includes urban expanses of Baltimore and Annapolis, Maryland, which are dominated by extensive residential and commercial development. ...

Reference:

Mapping bald eagle activity shadows around communal roosts: Implications for management guidelines
Recovery of Breeding Bald Eagles on Aberdeen Proving Ground, Maryland

... Electrocution risk is unevenly distributed within an overhead electric system and HRPPs generally comprise a small percentage of poles but pose a disproportionate risk of electrocution (Harness and Wilson 2001;Schomburg 2003;Cartron et al. 2005). The primary electrocution risk factors for bald and golden eagles are surrounding habitat and pole configuration (Mojica et al. 2009(Mojica et al. , 2018Bedrosian et al. 2020). To identify HRPPs that will fully and reliably offset permitted incidental take when mitigated, it is critical that stakeholders understand the influence these factors exert on electrocution risk. ...

Factors Contributing to Bald Eagle Electrocutions and Line Collisions on Aberdeen Proving Ground, Maryland

Journal of Raptor Research