Jaime Collazo, PhD (Former Employee)
Science and Products
Filter Total Items: 91
Avian fruit preferences across a Puerto Rican forested landscape: Pattern consistency and implications for seed removal Avian fruit preferences across a Puerto Rican forested landscape: Pattern consistency and implications for seed removal
Avian fruit consumption may ensure plant reproductive success when frugivores show consistent preference patterns and effectively remove and disperse seeds. In this study we examined avian fruit preferences and their seed-removal services at five study sites in north-central Puerto Rico. At each site, we documented the diet of seven common fruit-eating avian species from February to...
Authors
T.A. Carlo, J.A. Collazo, Martha Groom
Density and distribution of water boatmen and brine shrimp at a major shorebird wintering area in Puerto Rico Density and distribution of water boatmen and brine shrimp at a major shorebird wintering area in Puerto Rico
The Cabo Rojo salt flats are an important wintering area for migratory shorebirds. Their quality is intimately related to prey availability, as prey are needed to meet energetic requirements. Understanding prey dynamics is, therefore, a key element of shorebird conservation plans. To this end, we monitored the density and distribution of water-boatmen (Trichocorixa spp.) and brine shrimp...
Authors
K.J. Tripp, J.A. Collazo
Accessible habitat for shorebirds: Factors influencing its availability and conservation implications Accessible habitat for shorebirds: Factors influencing its availability and conservation implications
We examined the relationship between water levels and accessible habitat, and how accessible habitat influenced Dunlin (Calidris alpina) and Semipalmated Sandpiper (Calidris pusilla) numbers in managed wetlands at Pea Island (North Carolina) and Merritt Island (Florida) National Wildlife Refuges in 1998 and 1999. At Pea Island we experimentally manipulated water levels, which also...
Authors
J.A. Collazo, D. O’Harra, C.A. Kelly
Population size, survival, and movements of white-cheeked pintails in Eastern Puerto Rico Population size, survival, and movements of white-cheeked pintails in Eastern Puerto Rico
We estimated numbers and survival of White-cheeked Pintails (Anas bahamensis) in eastern Puerto Rico during 1996-1999. We also quantified their movements between Culebra Island and the Humacao Wildlife Refuge, Puerto Rico. Mark-resight population size estimates averaged 1020 pintails during nine, 3-month sampling periods from January 1997 to June 1999. On average, minimum regional counts...
Authors
J.A. Collazo, G. Bonilla-Martinez
Scale dependence in the effects of forest coverage on parasitization by brown-headed cowbirds Scale dependence in the effects of forest coverage on parasitization by brown-headed cowbirds
Abstract has not been submitted
Authors
W.M. Hochachka, T. Martin, V. Artman, C.R. Smith, S.J. Hejl, D. E. Andersen, D. Curson, L. Petit, N. Mathews, T. Donovan, Erwin E. Klaas, P.B. Wood, J.C. Manolis, K.P. McFarland, J.V. Nichols, J.C. Bednarz, D.M. Evans, J.P. Duguay, S. Garner, J. Tewksbury, K.L. Purcell, John Faaborg, C.B. Goguen, C. Rimmer, R. Dettmers, M. Knutson, J.A. Collazo, L. Garner, D. Whitehead, G. Geupel
Do black ducks and wood ducks habituate to aircraft disturbance? Do black ducks and wood ducks habituate to aircraft disturbance?
Requests to increase military aircraft activity in some training facilities in the United States have raised the need to determine if waterfowl and other wildlife are adversely affected by aircraft disturbance. We hypothesized that habituation was a possible proximate factor influencing the low proportion of free-ranging ducks reacting to military aircraft activities in a training range...
Authors
J.T. Conomy, J.A. Dubovsky, J.A. Collazo, W. Fleming
Dabbling duck behavior and aircraft activity in coastal North Carolina Dabbling duck behavior and aircraft activity in coastal North Carolina
Requests to increase military aircraft activity in some training facilities in the United States have prompted the need to determine if waterfowl and other wildlife are adversely affected by aircraft disturbance. We quantified behavioral responses of wintering American black ducks (Anas rubripes), American wigeon (A. americana), gadwall (A. strepera), and American green-winged teal (A...
Authors
J.T. Conomy, J.A. Collazo, J.A. Dubovsky, W. Fleming
Science and Products
Filter Total Items: 91
Avian fruit preferences across a Puerto Rican forested landscape: Pattern consistency and implications for seed removal Avian fruit preferences across a Puerto Rican forested landscape: Pattern consistency and implications for seed removal
Avian fruit consumption may ensure plant reproductive success when frugivores show consistent preference patterns and effectively remove and disperse seeds. In this study we examined avian fruit preferences and their seed-removal services at five study sites in north-central Puerto Rico. At each site, we documented the diet of seven common fruit-eating avian species from February to...
Authors
T.A. Carlo, J.A. Collazo, Martha Groom
Density and distribution of water boatmen and brine shrimp at a major shorebird wintering area in Puerto Rico Density and distribution of water boatmen and brine shrimp at a major shorebird wintering area in Puerto Rico
The Cabo Rojo salt flats are an important wintering area for migratory shorebirds. Their quality is intimately related to prey availability, as prey are needed to meet energetic requirements. Understanding prey dynamics is, therefore, a key element of shorebird conservation plans. To this end, we monitored the density and distribution of water-boatmen (Trichocorixa spp.) and brine shrimp...
Authors
K.J. Tripp, J.A. Collazo
Accessible habitat for shorebirds: Factors influencing its availability and conservation implications Accessible habitat for shorebirds: Factors influencing its availability and conservation implications
We examined the relationship between water levels and accessible habitat, and how accessible habitat influenced Dunlin (Calidris alpina) and Semipalmated Sandpiper (Calidris pusilla) numbers in managed wetlands at Pea Island (North Carolina) and Merritt Island (Florida) National Wildlife Refuges in 1998 and 1999. At Pea Island we experimentally manipulated water levels, which also...
Authors
J.A. Collazo, D. O’Harra, C.A. Kelly
Population size, survival, and movements of white-cheeked pintails in Eastern Puerto Rico Population size, survival, and movements of white-cheeked pintails in Eastern Puerto Rico
We estimated numbers and survival of White-cheeked Pintails (Anas bahamensis) in eastern Puerto Rico during 1996-1999. We also quantified their movements between Culebra Island and the Humacao Wildlife Refuge, Puerto Rico. Mark-resight population size estimates averaged 1020 pintails during nine, 3-month sampling periods from January 1997 to June 1999. On average, minimum regional counts...
Authors
J.A. Collazo, G. Bonilla-Martinez
Scale dependence in the effects of forest coverage on parasitization by brown-headed cowbirds Scale dependence in the effects of forest coverage on parasitization by brown-headed cowbirds
Abstract has not been submitted
Authors
W.M. Hochachka, T. Martin, V. Artman, C.R. Smith, S.J. Hejl, D. E. Andersen, D. Curson, L. Petit, N. Mathews, T. Donovan, Erwin E. Klaas, P.B. Wood, J.C. Manolis, K.P. McFarland, J.V. Nichols, J.C. Bednarz, D.M. Evans, J.P. Duguay, S. Garner, J. Tewksbury, K.L. Purcell, John Faaborg, C.B. Goguen, C. Rimmer, R. Dettmers, M. Knutson, J.A. Collazo, L. Garner, D. Whitehead, G. Geupel
Do black ducks and wood ducks habituate to aircraft disturbance? Do black ducks and wood ducks habituate to aircraft disturbance?
Requests to increase military aircraft activity in some training facilities in the United States have raised the need to determine if waterfowl and other wildlife are adversely affected by aircraft disturbance. We hypothesized that habituation was a possible proximate factor influencing the low proportion of free-ranging ducks reacting to military aircraft activities in a training range...
Authors
J.T. Conomy, J.A. Dubovsky, J.A. Collazo, W. Fleming
Dabbling duck behavior and aircraft activity in coastal North Carolina Dabbling duck behavior and aircraft activity in coastal North Carolina
Requests to increase military aircraft activity in some training facilities in the United States have prompted the need to determine if waterfowl and other wildlife are adversely affected by aircraft disturbance. We quantified behavioral responses of wintering American black ducks (Anas rubripes), American wigeon (A. americana), gadwall (A. strepera), and American green-winged teal (A...
Authors
J.T. Conomy, J.A. Collazo, J.A. Dubovsky, W. Fleming