Matthew C. Perry, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 131
The midwinter survey of black ducks, locally and regionally The midwinter survey of black ducks, locally and regionally
The Midwinter Waterfowl Inventory (MWI) has been conducted consistently in Maryland since 1955 and in Virginia since 1957. Maryland currently focuses surveys in 30 segments along the Chesapeake Bay, Potomac River, and Atlantic Coast, whereas Virginia focuses on 22 segments centered over the eastern shore of Chesapeake Bay and along the tidewater areas of Back Bay and western shore...
Authors
Dennis G. Jorde, Daniel B. Stotts
Understanding food webs in the Chesapeake Bay Understanding food webs in the Chesapeake Bay
Approaches to predictive modeling and to management of the Chesapeake Bay ecosystem are 'bottom up' (i.e., approaches involve the control of nutrient inputs in attempts to manage plankton productivity) and 'top down' (i.e., approaches involve controls on harvest of fisheries and wildlife in attempts to manage vertebrate populations). Both approaches are limited by a lack of understanding...
Authors
J.R. Keough, G.M. Haramis, Matthew C. Perry
American black duck summer range versus winter range: a dichotomy of riches American black duck summer range versus winter range: a dichotomy of riches
The status of the American black duck (Anas rubripes) population has more often been attributed to a single event than to multiple events over time and throughout space. The difference in the quality of the habitat, however defined, within breeding areas in the North and in the southerly wintering areas, especially Chesapeake Bay, also has been proposed as affecting black duck status...
Authors
J. R. Longcore
The exotic mute swan (Cygnus olor) in Chesapeake Bay, USA The exotic mute swan (Cygnus olor) in Chesapeake Bay, USA
The exotic mute swan (Cygnus olor) has increased its population size in Chesapeake Bay (Maryland and Virginia) to approximately 4,500 since 1962 when five swans were released in the Bay. The Bay population of mute swans now represents 30% of the total Atlantic Flyway population (12,600) and has had a phenomenal increase of 1,200% from 1986 to 1999. Unlike the tundra swans (Cygnus...
Authors
Matthew C. Perry
Science and Products
Filter Total Items: 131
The midwinter survey of black ducks, locally and regionally The midwinter survey of black ducks, locally and regionally
The Midwinter Waterfowl Inventory (MWI) has been conducted consistently in Maryland since 1955 and in Virginia since 1957. Maryland currently focuses surveys in 30 segments along the Chesapeake Bay, Potomac River, and Atlantic Coast, whereas Virginia focuses on 22 segments centered over the eastern shore of Chesapeake Bay and along the tidewater areas of Back Bay and western shore...
Authors
Dennis G. Jorde, Daniel B. Stotts
Understanding food webs in the Chesapeake Bay Understanding food webs in the Chesapeake Bay
Approaches to predictive modeling and to management of the Chesapeake Bay ecosystem are 'bottom up' (i.e., approaches involve the control of nutrient inputs in attempts to manage plankton productivity) and 'top down' (i.e., approaches involve controls on harvest of fisheries and wildlife in attempts to manage vertebrate populations). Both approaches are limited by a lack of understanding...
Authors
J.R. Keough, G.M. Haramis, Matthew C. Perry
American black duck summer range versus winter range: a dichotomy of riches American black duck summer range versus winter range: a dichotomy of riches
The status of the American black duck (Anas rubripes) population has more often been attributed to a single event than to multiple events over time and throughout space. The difference in the quality of the habitat, however defined, within breeding areas in the North and in the southerly wintering areas, especially Chesapeake Bay, also has been proposed as affecting black duck status...
Authors
J. R. Longcore
The exotic mute swan (Cygnus olor) in Chesapeake Bay, USA The exotic mute swan (Cygnus olor) in Chesapeake Bay, USA
The exotic mute swan (Cygnus olor) has increased its population size in Chesapeake Bay (Maryland and Virginia) to approximately 4,500 since 1962 when five swans were released in the Bay. The Bay population of mute swans now represents 30% of the total Atlantic Flyway population (12,600) and has had a phenomenal increase of 1,200% from 1986 to 1999. Unlike the tundra swans (Cygnus...
Authors
Matthew C. Perry
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government