Matthew C. Perry, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 131
Behaviour of captive canvasbacks Aythya valisineria fed different diets during winter Behaviour of captive canvasbacks Aythya valisineria fed different diets during winter
Time activity budget studies were conducted on captive Canvasbacks manintained on ad libitum diets with varying levels of protein and energy during the winter of 1978-79 and 1979-80. No differences could be detected in the behaviour of the ducks as a result of the diets they received. Differences due to season and sex were observed for some behaviours. Activity decreased (P
Authors
Matthew C. Perry, B. Kenneth Williams, H.H. Obrecht
Patuxent: The dream becomes reality Patuxent: The dream becomes reality
No abstract available.
Authors
Matthew C. Perry
Sex specificity of behavioral dominance and fasting endurance in wintering canvasbacks: Experimental results Sex specificity of behavioral dominance and fasting endurance in wintering canvasbacks: Experimental results
Hand-reared canvasbacks (Aythya valisineria) of varying sex ratios were maintained in pens during winter 1980-81 (3M-3F, 6M-0F, 0M-6F) and winter 1981-82 (4M-2F, 2M-4F) and fed two diets (control and stress). They were observed during feeding trials to determine intrasexual and intersexual aggressive activity. There was little evidence that either diet or sex ratio affected the total...
Authors
Matthew C. Perry, J.D. Nichols, M.J. Conroy, H.H. Obrecht, B. Kenneth Williams
Food habits and distribution of wintering canvasbacks, Aythya valisineria, on Chesapeake Bay Food habits and distribution of wintering canvasbacks, Aythya valisineria, on Chesapeake Bay
Baltic clams (Macoma balthica) were the predominant food items of 323 canvasbacks (Aythya valisineria) collected throughout Chesapeake Bay during 1970–1979. Natural vegetation constituted 4% of the food volume. Widgeongrass (Ruppia maritima) and redhead grass (Potamogeton perfoliatus) constituted the greatest percent volume and frequency of occurrence among the plant species, whereas...
Authors
Matthew C. Perry, F.M. Uhler
[Book review] Story of extinct birds told with accuracy, verve: Extinct Birds, by Errol Fuller. Facts on File Publications, 1988 [Book review] Story of extinct birds told with accuracy, verve: Extinct Birds, by Errol Fuller. Facts on File Publications, 1988
No abstract available.
Authors
Matthew C. Perry
Waterfowl of Chesapeake Bay Waterfowl of Chesapeake Bay
No abstract available.
Authors
Matthew Perry
Common loon at the Patuxent Wildlife Research Center Common loon at the Patuxent Wildlife Research Center
No abstract available.
Authors
Matthew C. Perry
Influence of nutrients on feed intake and condition of captive canvasbacks in winter Influence of nutrients on feed intake and condition of captive canvasbacks in winter
Dramatic changes in the food habits and distribution of canvasbacks (Aythya valisineria) in Chesapeake Bay during the 1970's generated a need to evaluate the nutritional value of food items and the requirements of this species on its wintering grounds. Groups of captive canvasbacks were maintained ad libitum on 5 diets during the winters of 1978-79 and 1979-80 to evaluate the effects of...
Authors
Matthew C. Perry, Wayne J. Kuenzel, Byron K. Williams, John A. Serafin
[Book review] Bobwhites in the Rio Grande Plain of Texas [Book review] Bobwhites in the Rio Grande Plain of Texas
No abstract available.
Authors
Matthew C. Perry
Science and Products
Filter Total Items: 131
Behaviour of captive canvasbacks Aythya valisineria fed different diets during winter Behaviour of captive canvasbacks Aythya valisineria fed different diets during winter
Time activity budget studies were conducted on captive Canvasbacks manintained on ad libitum diets with varying levels of protein and energy during the winter of 1978-79 and 1979-80. No differences could be detected in the behaviour of the ducks as a result of the diets they received. Differences due to season and sex were observed for some behaviours. Activity decreased (P
Authors
Matthew C. Perry, B. Kenneth Williams, H.H. Obrecht
Patuxent: The dream becomes reality Patuxent: The dream becomes reality
No abstract available.
Authors
Matthew C. Perry
Sex specificity of behavioral dominance and fasting endurance in wintering canvasbacks: Experimental results Sex specificity of behavioral dominance and fasting endurance in wintering canvasbacks: Experimental results
Hand-reared canvasbacks (Aythya valisineria) of varying sex ratios were maintained in pens during winter 1980-81 (3M-3F, 6M-0F, 0M-6F) and winter 1981-82 (4M-2F, 2M-4F) and fed two diets (control and stress). They were observed during feeding trials to determine intrasexual and intersexual aggressive activity. There was little evidence that either diet or sex ratio affected the total...
Authors
Matthew C. Perry, J.D. Nichols, M.J. Conroy, H.H. Obrecht, B. Kenneth Williams
Food habits and distribution of wintering canvasbacks, Aythya valisineria, on Chesapeake Bay Food habits and distribution of wintering canvasbacks, Aythya valisineria, on Chesapeake Bay
Baltic clams (Macoma balthica) were the predominant food items of 323 canvasbacks (Aythya valisineria) collected throughout Chesapeake Bay during 1970–1979. Natural vegetation constituted 4% of the food volume. Widgeongrass (Ruppia maritima) and redhead grass (Potamogeton perfoliatus) constituted the greatest percent volume and frequency of occurrence among the plant species, whereas...
Authors
Matthew C. Perry, F.M. Uhler
[Book review] Story of extinct birds told with accuracy, verve: Extinct Birds, by Errol Fuller. Facts on File Publications, 1988 [Book review] Story of extinct birds told with accuracy, verve: Extinct Birds, by Errol Fuller. Facts on File Publications, 1988
No abstract available.
Authors
Matthew C. Perry
Waterfowl of Chesapeake Bay Waterfowl of Chesapeake Bay
No abstract available.
Authors
Matthew Perry
Common loon at the Patuxent Wildlife Research Center Common loon at the Patuxent Wildlife Research Center
No abstract available.
Authors
Matthew C. Perry
Influence of nutrients on feed intake and condition of captive canvasbacks in winter Influence of nutrients on feed intake and condition of captive canvasbacks in winter
Dramatic changes in the food habits and distribution of canvasbacks (Aythya valisineria) in Chesapeake Bay during the 1970's generated a need to evaluate the nutritional value of food items and the requirements of this species on its wintering grounds. Groups of captive canvasbacks were maintained ad libitum on 5 diets during the winters of 1978-79 and 1979-80 to evaluate the effects of...
Authors
Matthew C. Perry, Wayne J. Kuenzel, Byron K. Williams, John A. Serafin
[Book review] Bobwhites in the Rio Grande Plain of Texas [Book review] Bobwhites in the Rio Grande Plain of Texas
No abstract available.
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