A seasonal population matrix model of the Caribbean Red‐tailed Hawk<i>Buteo jamaicensis jamaicensis</i>in eastern Puerto Rico

Gallardo, Julio César Rubio; Vilella, Francisco J.; Colvin, Michael E.

doi:10.1111/ibi.12703

Cited by 4 publications

(7 citation statements)

References 73 publications

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“…We defined a population-scale impact to be that which alters survival of bald eagles and, therefore λ, but we acknowledge that other researchers may use different definitions. Additional definitions of a population-scale impact may include cumulative, stochastic, or transient growth rates (Tuljapurkar 1990, Tuljapurkar 1992, Caswell 2001, Ezard et al 2010, Gerber and Kendall 2016, life tables (Deevey 1947), abundance (Fox and Gurevitch 2000, Caswell 2001, Gallardo et al 2019, stable-stage distributions (Caswell 2001), reproductive values (Caswell 2001), or elasticities (de Kroon et al 2000, Caswell 2001). For completeness, we provided these comparisons using these other properties in the NYCounterPOPdV2 software.…”

Section: Discussionmentioning

confidence: 99%

Population impact to bald eagles by ingested lead in New York State, 1990–2018

Hanley

Them²,

Hynes

et al. 2023

Wildlife Society Bulletin

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While the recent population recovery of bald eagles (Haliaeetus leucocephalus) in New York State, USA, is a conservation success, evidence from necropsies suggest that ingested lead (Pb) from ammunition fragments is causing morbidity and mortality to wild eagles. Wildlife managers and officials at the New York State Department of Environmental Conservation would benefit from analysis of their necropsy data to understand how documented morbidities or mortalities impact dynamics of the remaining wild eagle population. We integrated necropsy data on bald eagles in New York State collected between 1990 and 2018 by the New York State Department of Environmental Conservation into a matrix population model. We compared annual survival of hatchling, non-breeding, and breeding eagles under factual (Pb) and counter factual (Pb-reduced or Pb-free) scenarios. We found no evidence that Pb altered annual survival of hatchlings. Lead was associated with a reduction in the annual survival of nonbreeders by 0-0.056 (females) and 0.052-0.057 (males), and a reduction in the annual survival of breeders by 0.051-0.057 (females) and 0-0.032 (males). Lead was associated with a reduction in the long-term growth rate (λ) by 0.009-0.036 (females) and 0.023-0.035 (males). Due to altered dynamics over the prior 3 decades, abundances of eagles in the most recent year of the study (2018) differed between Pb

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Section: Discussionmentioning

confidence: 99%

Population impact to bald eagles by ingested lead in New York State, 1990–2018

Hanley

Them²,

Hynes

et al. 2023

Wildlife Society Bulletin

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“…The Lefkovitch matrix (Lefkovitch ) contained three stages: a juvenile stage (hatchling; hereafter “SI”), a combined immature and non‐reproducing adult stage (SII), and a reproducing adult stage (SIII). We assumed an equal sex ratio (Millsap et al , Gallardo et al ) and modeled females only, but the modeling of males could be conducted without issue.…”

Section: Methodsmentioning

confidence: 99%

“…The structure of a PMM can be adapted to the characteristics of any life history (e.g., see Salguero‐Gómez et al , ), but applied PMMs are frequently limited by reliable information on individual parameter values (Gallardo et al ). Estimation of parameters is a key endeavor in ecology, and most of the current methods rely on extensive field effort.…”

Section: Introductionmentioning

confidence: 99%

Using time series data to assess recent population dynamics of Bald Eagles in the northeast United States

et al. 2019

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We explored the use of time series data to study the recent demographics of Bald Eagles in the northeast United States. We merged a stage-structured population matrix model (PMM) into a combinatorial optimization algorithm (COA) to estimate stage-wise abundances, survival rates, and other dynamics of the eagle population from 1990 to 2018. The PMM includes biannual periods (breeding and nonbreeding), density dependence, and stage-wise migration and dispersal. We demonstrated theoretically that the information contained in 17 yr of time series data of the reproductive stage would have contained all the information for the entire population. We then tested the performance of the COA in estimating transient and asymptotic population dynamics using simulated data. Finally, we assessed the COA under differing modeling conditions (without stage-wise dispersal and in the absence of biological assumptions). We found that time series data of the reproductive class, the skeleton of the PMM, and COA are sole ingredients to reliably estimate stage-wise abundances and survival, but additional biological assumptions are helpful in honing precision of the estimates. The algorithm is a tool to assess population dynamics when demographic data are limited to counts of reproductive adults.

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“…short‐lived vs longer‐lived, Figure 1, Sæther & Bakke, 2000), project demographic structure, and identify links between vital rate variation and life‐history evolution (Benton & Grant, 1999; Caswell, 2001; van Tienderen, 1995). Seasonal matrix models have previously been formulated, for instance considering seasonal demography in European ticks Ixodes ricinus (Dobson et al, 2011) and Caribbean Red‐tailed Hawks Buteo jamaicensis jamaicensis (Gallardo et al, 2019). However, general models that jointly and explicitly consider variation in seasonal migration probability, plasticity and associated survival have not previously been formulated or analysed.…”

Section: Introductionmentioning

confidence: 99%

Modelling the responses of partially migratory metapopulations to changing seasonal migration rates: From theory to data

Payo‐Payo

Acker

Bocedi

et al. 2022

Journal of Animal Ecology

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1. Among-individual and within-individual variation in expression of seasonal migration versus residence is widespread in nature and could substantially affect the dynamics of partially migratory metapopulations inhabiting seasonally and spatially structured environments. However, such variation has rarely been explicitly incorporated into metapopulation dynamic models for partially migratory systems. We, therefore, lack general frameworks that can identify how variable seasonal movements, and associated season-and location-specific vital rates, can control system persistence.2. We constructed a novel conceptual framework that captures full-annual-cycle dynamics and key dimensions of metapopulation structure for partially migratory species inhabiting seasonal environments. We conceptualize amongindividual variation in seasonal migration as two variable vital rates: seasonal movement probability and associated movement survival probability. We conceptualize three levels of within-individual variation (i.e. plasticity), representing seasonal or annual variation in seasonal migration or lifelong fixed strategies.We formulate these concepts as a general matrix model, which is customizable for diverse life-histories and seasonal landscapes.3. To illustrate how variable seasonal migration can affect metapopulation growth rate, demographic structure and vital rate elasticities, we parameterize our general models for hypothetical short-and longer-lived species. Analyses illustrate that elasticities of seasonal movement probability and associated survival probability can sometimes equal or exceed those of vital rates typically understood to substantially influence metapopulation dynamics (i.e. seasonal survival probability or fecundity), that elasticities can vary non-linearly, and that metapopulation outcomes depend on the level of within-individual plasticity.

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A seasonal population matrix model of the Caribbean Red‐tailed HawkButeo jamaicensis jamaicensisin eastern Puerto Rico

Cited by 4 publications

References 73 publications

Population impact to bald eagles by ingested lead in New York State, 1990–2018

Population impact to bald eagles by ingested lead in New York State, 1990–2018

Using time series data to assess recent population dynamics of Bald Eagles in the northeast United States

Modelling the responses of partially migratory metapopulations to changing seasonal migration rates: From theory to data

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