Frank Rivera-milan

Frank Rivera-milan
U.S. Fish and Wildlife Service · Division of Migratory Bird Management

PhD
Assessing population responses of Caribbean resident and migratory birds to extreme weather events and hunting pressure

About

38
Publications
4,646
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
397
Citations
Introduction
Population ecologist working with the Branch of Population Assessment and Decision Support, Division of Migratory Bird Management, United States Fish and Wildlife Service. Currently conducting post-hurricane assessments across the insular Caribbean. Using monitoring and modeling to assess bird population responses (stability, resiliency) to major hurricanes.
Additional affiliations
September 2006 - January 2021
U.S. Fish and Wildlife Service
Position
  • Researcher
Description
  • Main area of interest is population ecology and the application of methods in ecology and statistics to monitoring, management and conservation of vertebrates in the Caribbean.

Publications

Publications (38)
Article
Full-text available
Registered hunters harvested over 1.3 million non-native invasive green iguanas ( Iguana iguana ) on Grand Cayman between October 2018 and August 2021. We used islandwide post-reproduction survey-based abundance estimates in August 2014–2021 and model-based abundance predictions for August 2022–2030 to assist natural resource managers with reassess...
Article
Full-text available
The common raven (Corvus corax; raven) is a nest predator of species of conservation concern, such as the greater sage-grouse (Centrocercus urophasianus). Reducing raven abundance by take requires authorization under the Migratory Bird Treaty Act. To support U.S. Fish and Wildlife Service's take decisions (e.g., those that authorize killing a speci...
Article
Full-text available
Structural vegetation damage and food limitation are important effects of major hurricanes, particularly for fruit/seed-eating, forest-dependent Caribbean birds with restricted distributions and small populations, such as the Bridled Quail-dove Geotrygon mystacea. Motivated by the lack of abundance estimates, corrected for detection probability, we...
Article
Full-text available
Since the 1980s, 3 major hurricanes have made landfall on Puerto Rico: Hugo in September 1989 (Saffir-Simpson scale, category 4), Georges in September 1998 (category 3) and María in September 2017 (category 4). María was the most devastating hurricane since the 3 major hurricanes that occurred in 1899−1932. Major hurricanes can cause severe abun...
Technical Report
Full-text available
This report is financed by Openbaar Lichaam Bonaire and it is a baseline study of the feral donkey population of the Island of Bonaire, Caribbean Netherlands. Additionally, the report provides recommendations to improve future surveys on population estimates.
Article
Full-text available
The green iguana (Iguana iguana) was most likely introduced as a pet and became overabundant during the last 20 years on Grand Cayman. Because negative impacts were unmanageable (e.g., damage to buildings and other infrastructure), a harvest management strategy was developed and implemented, and over 874,252 green iguanas were removed between Octob...
Article
Full-text available
Green and hawksbill turtles are negatively impacted by natural and anthropogenic disturbances, including an unknown number killed annually in the coastal waters of Bonaire and Klein Bonaire, Caribbean Netherlands. We used N-mixture models, conventional distance sampling and the multiple Lincoln-Petersen method to estimate abundance from transect-co...
Article
Full-text available
Abundance estimates based on adequate survey design and count methodology are needed for population monitoring and modelling, and for assessing the results of conservation actions taken to boost or maintain population size at desired target levels. We monitored Bonaire’s population of yellow-shouldered parrot Amazona barbadensis rothschildi using s...
Article
Full-text available
Two subspecies of Cuban Parrot (Amazona leucocephala; hereafter Grand Cayman Parrot and Cayman Brac Parrot [for singular] or Cayman Islands Parrots [for plural]) inhabit the Cayman Islands-the Grand Cayman Parrot (A. l. caymanensis) and the Cayman Brac Parrot (A. l. hesterna). Both subspecies are threatened by habitat loss, hunting by farmers, the...
Article
Full-text available
The Puerto Rican Plain Pigeon (Patagioenas inornata wetmorei) and the White-crowned Pigeon (P. leucocephala) are hunted illegally in Puerto Rico, despite being protected. Data are lacking to estimate how many are hunted illegally each year. For this reason, we used abundance estimates derived from distance sampling surveys conducted in 1986-2014 to...
Conference Paper
Full-text available
Cayman Brac Red-Legged Thrush Population Status Assessment. *Jessica Harvey, *Jane Haakonsson, and **Frank F. Rivera-Milán *Cayman Islands Department of Environment, Cayman Islands **United States Fish and Wildlife Service, Maryland, USA E-mail: Jessica.Harvey@gov.ky The Cayman Brac Red-legged Thrush (Turdus plumbeus coryi) is an island endemic su...
Conference Paper
Full-text available
Cayman Brac and Grand Cayman Parrot Population Status Assessment. *Jane Haakonsson, *Jessica Harvey and **Frank F. Rivera-Milán *Cayman Islands Department of Environment, Cayman Islands **United States Fish and Wildlife Service, Maryland, USA E-mail: Jane.Haakonsson@gov.ky Two endemic subspecies of Amazona leucocephala parrots inhabit the Cayman I...
Article
Full-text available
BioOne sees sustainable scholarly publishing as an inherently collaborative enterprise connecting authors, nonprofit publishers, academic institutions, research libraries, and research funders in the common goal of maximizing access to critical research. BioOne (www.bioone.org) is a nonprofit, online aggregation of core research in the biological,...
Article
In wildlife translocations, it is important to identify reliable monitoring methods that can provide accurate population estimates for post-release management. We compared density and abundance estimates of distance sampling and repeated counts with complete counts (census data) to determine accuracy (percentage relative bias) and precision (coeffi...
Conference Paper
Full-text available
Assessing Population Sustainability to Illegal Hunting of the Plain Pigeon and White-Crowned Pigeon in Puerto Rico. *Frank F. Rivera-Milán, and **Alexis J. Martínez *United States Fish and Wildlife Service, Maryland, USA **Department of Natural and Environmental Resources, San Juan, Puerto Rico E-mail: frank_rivera@fws.gov Columbids are hunted leg...
Article
Full-text available
The scaly-naped pigeon (Patagioenas squamosa) is threatened by hunting in the Caribbean. At present, the pigeon is abundant in Puerto Rico, but overharvesting is a major concern; therefore, the development of a sustainable harvest strategy is a management priority. The management objective of the harvest strategy is to maximize hunting opportunity...
Article
Full-text available
The white-cheeked pintail (Anas bahamensis) is listed as threatened, and survey data are needed to assess population status, estimate trends, and guide management on Puerto Rico and territorial islands. We surveyed 51 points in 29 wetland sites to estimate density and population size after the peak of reproduction (Mar-Jul) and before the waterfowl...
Article
Pesticides caused high mortality of birds in agro-ecosystems of Argentina's Pampas region during 1995–2003. As part of a program to monitor mortality events, we trained observers in distance sampling methods, conducted field trials under simulated conditions to assess the degree to which the critical assumptions of line-transect surveys were met, a...
Article
Full-text available
The Plain Pigeon (Columba inornata) was listed as endangered in Puerto Rico in 1970. During 1986–1992 and 1997–2001, we collected point transect survey data to estimate density, population size, and rate of change. Density and population size estimates increased between 1986–1992 and 1997–2001. With a mean density of 0.25 ± 0.06 SE individuals/ha a...
Article
Full-text available
Efectuamos un estudio de captura-recaptura de la tórtola cardosantera (Zenaida aurita) en tres vaquerías colindantes en el estecentral de Puerto Rico durante 1984–1997. Durante 46 períodos de muestreo, el promedio de la tasa de sobrevivencia por período de muestreo fue 0,77 (rango = 0,10–1,0), el reclutamiento promedio fue 911 individuos (rango = 1...
Article
Full-text available
Resumen. Efectué muestreos de nidos de palomas y tórtolas (Columbidae) en transectos en las islas de Puerto Rico, Vieques, y Culebra. La probabilidad de detección y la densidad de los nidos difirieron entre las áreas de estudio de enero a agosto en 1991 y 1992. La probabilidad de detección y la densidad de los nidos no difirieron entre los años y l...
Article
Full-text available
The demography of Zenaida Doves (Zenaida aurita) was studied on Cayo del Agua, Culebra, Puerto Rico. We collected capture-recapture and reproductive success data and monitored annual changes in the density of ground nests in 1987–1993 and 2000. Models with time-specific apparent survival and constant capture rates (̂t, p̂c) and constant apparent su...
Article
Full-text available
Once abundant and widely distributed, the Bahama parrot (Amazona leucocephala bahamensis) currently inhabits only the Great Abaco and Great Inagua Islands of the Bahamas. In January 2003 and May 2002–2004, we conducted point-transect surveys (a type of distance sampling) to estimate density and population size and make recommendations for monitorin...
Article
Pesticides caused high mortality of birds in agro-ecosystems of Argentina's Pampas region during 1995–2003. As part of a program to monitor mortality events, we trained observers in distance sampling methods, conducted field trials under simulated conditions to assess the degree to which the critical assumptions of line-transect surveys were met, a...
Article
Full-text available
The Puerto Rican Plain Pigeon (Columba inornata wetmorei) was listed as endangered in 1970. Transect-survey and nest-monitoring data were collected to estimate reproductive parameters and to assess effects of weather, food, predation, and habitat. We monitored 377 of 423 nests found in east-central Puerto Rico during February-September 1986-2000. T...
Article
Full-text available
The Puerto Rican Plain Pigeon (Columba inornata wetmorei) was listed as endangered in 1970. Transect-survey and nest-monitoring data were collected to estimate reproductive parameters and to assess effects of weather, food, predation, and habitat. We monitored 377 of 423 nests found in east-central Puerto Rico during February-September 1986-2000. T...
Article
Full-text available
The demography of Zenaida Doves (Zenaida aurita) was studied on Cayo del Agua, Culebra, Puerto Rico. We collected capture-recapture and reproductive success data and monitored annual changes in the density of ground nests in 1987–1993 and 2000. Models with time-specific apparent survival and constant capture rates (ϕ̂t, p̂c) and constant apparent s...
Article
I conducted transect surveys of pigeon and dove (Columbidae) nests on Puerto Rico, Vieques, and Culebra islands. Nest detection probability and density differed between study areas in January–August 1991 and 1992. Nest detection probability and density did not differ between years or among species, so I used transect data from a larger study (1986–...
Article
We conducted a capture-recapture study of Zenaida Doves (Zenaida aurita) in three neighboring dairy farms in east-central Puerto Rico during 1984-1997. During 46 sampling periods, mean survival rate per sampling period was 0.77 (range = 0.1-1.0) mean recruitment was 911 individuals (range = 182-5,124), and mean population size was 1,569 individuals...
Article
Full-text available
We conducted a capture-recapture study of Zenaida Doves (Zenaida aurita) in three neighboring dairy farms in eastcentral Puerto Rico during 1984–1997. During 46 sampling periods, mean survival rate per sampling period was 0.77 (range = 0.1–1.0), mean recruitment was 911 individuals (range = 182–5,124), and mean population size was 1,569 individuals...
Article
Full-text available
I collected line transect data and capture-recapture data to estimate basic demographic parameters of Zenaida doves (Zenaida aurita) in farmlands and second-growth forests in eastcentral Puerto Rico during 1990-92. Zenaida doves are widely hunted, and data on demographic parameters are needed for population management and monitoring. Mean survival...
Article
The Zenaida Dove (Zenaida aurita) is common and widely distributed in the three major life zones (dry, moist, wet) of Puerto Rico. The xerophytic forest of Guánica may be a key habitat for the reproduction of Zenaida Doves in the dry zone. Point-counts (six 3-min stations) were conducted from 1986-1996 and nest-counts (46 0.1-ha striptransects) fro...
Article
Full-text available
A total of 868 active nests of eight species of pigeons and doves (columbids) were found in 210 0.1 ha strip-transects sampled in the three major life zones of Puerto Rico from February 1987 to June 1992. The columbids had a peak in nest density in May and June, with a decline during the July to October flocking period, and an increase from Novembe...
Article
Full-text available
Relative abundance (birds/km) and density (birds/km2) estimates are commonly assumed to be cor- related at multiple spatio-temporal scales. However, annual and seasonal estimates of relative abundance should be adjusted for detection area, especially when comparisons of species abundances in heterogeneous habitats are of interest. From 1986-92, I c...
Article
Full-text available
hOtI3 July 1986 to June 1988, I counted all raptors (Falconiformes and Stri- giformes) seen or heard along 1.5 g-km routes in the three major life zones of Puerto Rico (moist, wet, and dry). Red-tailed Hawks (Buteo jamaicensis) and American Kestrels (F&o sparverius) were the most abundant year-round residents. Red-tailed Hawks were more abundant in...
Article
Full-text available
From July 1986 to January 1989 standardized call and sight counts were conducted to examine the distribution and relative abundance patterns of Plain Pigeons (Columba inornata), White-crowned Pigeons (C. leucocephala), Scaly-naped Pigeons (C. squamosa), Zenaida Doves (Zenaida aurita), White-winged Doves (Z. nsiatica), Mourning Doves (Z. macroura),...
Article
Beetles secrete an array of chemicals generally believed to mitigate attack by predators. Methylcyclopentanoid monoterpenes secreted by larvae of the willow leaf beetle, Plagiodera versicolora, deter feeding by conspecific adults. Furthermore, the secretion elicits a strong repugnancy response in larvae of another willow herbivore, Nymphalis antiop...
Article
Full-text available
Ten native species of pigeons and doves (Columbidae) occur in Puerto Rico and its offshore territories: scaly-naped pigeon (Columba squamosa), white-crowned pigeon (C. leucocephala), plain pigeon (C. inornata), white-winged dove (Zenaida asia tim), zenaida dove (Z. aurita), mourning dove (Z. macmum), common ground-dove (Columbina passerina), ruddy...

Projects

Projects (3)
Project
Model and estimate detection probability, occupancy, density, population size, species interaction factor (co-occupancy), and post-hurricane rate of change (population decline, recovery time)
Project
Assess population response to cat removal, fires and hurricanes