Jaime Collazo, PhD (Former Employee)
Science and Products
Filter Total Items: 91
Shade-grown coffee in Puerto Rico: Opportunities to preserve biodiversity while reinvigorating a struggling agricultural commodity Shade-grown coffee in Puerto Rico: Opportunities to preserve biodiversity while reinvigorating a struggling agricultural commodity
Shade-grown coffee contributes to biodiversity conservation and has many ecological benefits. We reviewed historical trends in coffee production and interviewed 100 coffee growers in 1999 to determine current management practices and attitudes toward the cultivation of sun and shade coffee in Puerto Rico. We discuss the outlook for the coffee industry in the 21st century and implications...
Authors
R. Borkhataria, Jaime A. Collazo, Martha J. Groom, A. Jordan-Garcia
Nest and chick survival and colony-site dynamics of least terns in the U.S. Virgin Islands Nest and chick survival and colony-site dynamics of least terns in the U.S. Virgin Islands
We report nest and chick survival and colony-site dynamics of the Least Tern (Sternula antillarum). These results are the first for the Caribbean and were derived with likelihood-based approaches from 4640 nests and 44 chicks fitted with transmitters monitored in 52 colonies at St. Croix, U.S. Virgin Islands, 2003–2006. Managed colonies excluded, overall daily nest survival (±SE) was 0...
Authors
Claudia D. Lombard, Jaime Collazo, Douglas B. McNair
Functional response models to estimate feeding rates of wading birds Functional response models to estimate feeding rates of wading birds
Forager (predator) abundance may mediate feeding rates in wading birds. Yet, when modeled, feeding rates are typically derived from the purely prey-dependent Holling Type II (HoII) functional response model. Estimates of feeding rates are necessary to evaluate wading bird foraging strategies and their role in food webs; thus, models that incorporate predator dependence warrant...
Authors
J.A. Collazo, J.F. Gilliam, L. Miranda-Castro
Vegetation effects on fish distribution in impounded salt marshes Vegetation effects on fish distribution in impounded salt marshes
We compared the density and biomass of resident fish in vegetated and unvegetated flooded habitats of impounded salt marshes in the northern Indian River Lagoon (IRL) Estuary of east-central Florida. A 1-m2 throw trap was used to sample fish in randomly located, paired sample plots (n = 198 pairs) over 5 seasons in 7 impoundments. We collected a total of 15 fish taxa, and 88% of the...
Authors
Eric D. Stolen, Jaime Collazo, H. Franklin Percival
Site characteristics and prey abundance at foraging sites used by Lesser Scaup (Aythya affinis) wintering in Florida Site characteristics and prey abundance at foraging sites used by Lesser Scaup (Aythya affinis) wintering in Florida
We examined site characteristics and prey abundances where wintering Aythya affinis (Lesser Scaup; hereafter scaup) foraged within three regions of the Indian River Lagoon system in central Florida. We observed that scaup concentrated in the Indian and Banana rivers; however, density of prey items did not differ between foraging sites and random sites. We also found that site...
Authors
Garth Herring, Jaime Collazo
Scale-dependent habitat selection of nesting Great Egrets and Snowy Egrets Scale-dependent habitat selection of nesting Great Egrets and Snowy Egrets
Foraging habitat selection of nesting Great Egrets (Ardea alba) and Snowy Egrets (Egretta thula) was investigated within an estuary with extensive impounded salt marsh habitat. Using a geographic information system, available habitat was partitioned into concentric bands at five, ten, and 15 km radius from nesting colonies to assess the relative effects of habitat composition and...
Authors
Eric D. Stolen, J.A. Collazo, H.F. Percival
Science and Products
Filter Total Items: 91
Shade-grown coffee in Puerto Rico: Opportunities to preserve biodiversity while reinvigorating a struggling agricultural commodity Shade-grown coffee in Puerto Rico: Opportunities to preserve biodiversity while reinvigorating a struggling agricultural commodity
Shade-grown coffee contributes to biodiversity conservation and has many ecological benefits. We reviewed historical trends in coffee production and interviewed 100 coffee growers in 1999 to determine current management practices and attitudes toward the cultivation of sun and shade coffee in Puerto Rico. We discuss the outlook for the coffee industry in the 21st century and implications...
Authors
R. Borkhataria, Jaime A. Collazo, Martha J. Groom, A. Jordan-Garcia
Nest and chick survival and colony-site dynamics of least terns in the U.S. Virgin Islands Nest and chick survival and colony-site dynamics of least terns in the U.S. Virgin Islands
We report nest and chick survival and colony-site dynamics of the Least Tern (Sternula antillarum). These results are the first for the Caribbean and were derived with likelihood-based approaches from 4640 nests and 44 chicks fitted with transmitters monitored in 52 colonies at St. Croix, U.S. Virgin Islands, 2003–2006. Managed colonies excluded, overall daily nest survival (±SE) was 0...
Authors
Claudia D. Lombard, Jaime Collazo, Douglas B. McNair
Functional response models to estimate feeding rates of wading birds Functional response models to estimate feeding rates of wading birds
Forager (predator) abundance may mediate feeding rates in wading birds. Yet, when modeled, feeding rates are typically derived from the purely prey-dependent Holling Type II (HoII) functional response model. Estimates of feeding rates are necessary to evaluate wading bird foraging strategies and their role in food webs; thus, models that incorporate predator dependence warrant...
Authors
J.A. Collazo, J.F. Gilliam, L. Miranda-Castro
Vegetation effects on fish distribution in impounded salt marshes Vegetation effects on fish distribution in impounded salt marshes
We compared the density and biomass of resident fish in vegetated and unvegetated flooded habitats of impounded salt marshes in the northern Indian River Lagoon (IRL) Estuary of east-central Florida. A 1-m2 throw trap was used to sample fish in randomly located, paired sample plots (n = 198 pairs) over 5 seasons in 7 impoundments. We collected a total of 15 fish taxa, and 88% of the...
Authors
Eric D. Stolen, Jaime Collazo, H. Franklin Percival
Site characteristics and prey abundance at foraging sites used by Lesser Scaup (Aythya affinis) wintering in Florida Site characteristics and prey abundance at foraging sites used by Lesser Scaup (Aythya affinis) wintering in Florida
We examined site characteristics and prey abundances where wintering Aythya affinis (Lesser Scaup; hereafter scaup) foraged within three regions of the Indian River Lagoon system in central Florida. We observed that scaup concentrated in the Indian and Banana rivers; however, density of prey items did not differ between foraging sites and random sites. We also found that site...
Authors
Garth Herring, Jaime Collazo
Scale-dependent habitat selection of nesting Great Egrets and Snowy Egrets Scale-dependent habitat selection of nesting Great Egrets and Snowy Egrets
Foraging habitat selection of nesting Great Egrets (Ardea alba) and Snowy Egrets (Egretta thula) was investigated within an estuary with extensive impounded salt marsh habitat. Using a geographic information system, available habitat was partitioned into concentric bands at five, ten, and 15 km radius from nesting colonies to assess the relative effects of habitat composition and...
Authors
Eric D. Stolen, J.A. Collazo, H.F. Percival