scholarly journals An integrated population model for bird monitoring in North America

2017 ◽  
Vol 27 (3) ◽  
pp. 916-924 ◽  
Author(s):  
Farshid S. Ahrestani ◽  
James F. Saracco ◽  
John R. Sauer ◽  
Keith L. Pardieck ◽  
J. Andrew Royle
Keyword(s):  
North America ◽  
Population Model ◽  
Integrated Population Model ◽  
Bird Monitoring

scholarly journals Efficient use of harvest data: a size‐class‐structured integrated population model for exploited populations

Ecography ◽  
2021 ◽  
Author(s):  
Marlène Gamelon ◽  
Chloé R. Nater ◽  
Éric Baubet ◽  
Aurélien Besnard ◽  
Laura Touzot ◽  
...  
Keyword(s):  
Population Model ◽  
Size Class ◽  
Integrated Population Model ◽  
Harvest Data

scholarly journals An Integrated Population Model From Constant Effort Bird-Ringing Data

2010 ◽  
Vol 15 (1) ◽  
pp. 119-137 ◽  
Author(s):  
Vanessa M. Cave ◽  
Ruth King ◽  
Stephen N. Freeman
Keyword(s):  
Population Model ◽  
Integrated Population Model ◽  
Ringing Data

scholarly journals An integrated population model for estimating the relative effects of natural and anthropogenic factors on a threatened population of Pacific trout

2019 ◽  
Author(s):  
Mark D. Scheuerell ◽  
Casey P. Ruff ◽  
Joseph H. Anderson ◽  
Eric M. Beamer
Keyword(s):  
At Risk ◽  
Population Model ◽  
Habitat Restoration ◽  
Negative Relationship ◽  
Anthropogenic Factors ◽  
List Type ◽  
Population Demographics ◽  
Density Dependent ◽  
Integrated Population Model ◽  
The North

SummaryAssessing the degree to which at-risk species are regulated by density dependent versus density independent factors is often complicated by incomplete or biased information. If not addressed in an appropriate manner, errors in the data can affect estimates of population demographics, which may obfuscate the anticipated response of the population to a specific action.We developed a Bayesian integrated population model that accounts explicitly for interannual variability in the number of reproducing adults and their age structure, harvest, and environmental conditions. We apply the model to 41 years of data for a population of threatened steelhead troutOncorhynchus mykissusing freshwater flows, ocean indices, and releases of hatchery-born conspecifics as covariates.We found compelling evidence that the population is under strong density dependence, despite being well below its historical population size. In the freshwater portion of the lifecycle, we found a negative relationship between productivity (offspring per parent) and peak winter flows, and a positive relationship with summer flows. We also found a negative relationship between productivity and releases of hatchery conspecifics. In the marine portion of the lifecycle, we found a positive correlation between productivity and the North Pacific Gyre Oscillation. Furthermore, harvest rates on wild fish have been sufficiently low to ensure very little risk of overfishing.Synthesis and applications.The evidence for density dependent population regulation, combined with the substantial loss of juvenile rearing habitat in this river basin, suggests that habitat restoration could benefit this population of at-risk steelhead. Our results also imply that hatchery programs for steelhead need to be considered carefully with respect to habitat availability and recovery goals for wild steelhead. If releases of hatchery steelhead have indeed limited the production potential of wild steelhead, there are likely significant tradeoffs between providing harvest opportunities via hatchery steelhead production, and achieving wild steelhead recovery goals.

An integrated population model for estimating the relative effects of natural and anthropogenic factors on a threatened population of steelhead trout

2020 ◽  
Vol 58 (1) ◽  
pp. 114-124
Author(s):  
Mark D. Scheuerell ◽  
Casey P. Ruff ◽  
Joseph H. Anderson ◽  
Eric M. Beamer
Keyword(s):  
Population Model ◽  
Anthropogenic Factors ◽  
Steelhead Trout ◽  
Integrated Population Model ◽  
Natural And Anthropogenic Factors

scholarly journals Dynamics of Spruce budworms and single species competition models with bifurcation analysis

2020 ◽  
Vol 9 (6) ◽  
pp. 217-222
Author(s):  
Farah Tasnim ◽  
Md. Kamrujjaman
Keyword(s):  
North America ◽  
Mathematical Models ◽  
Bifurcation Analysis ◽  
Population Model ◽  
Choristoneura Fumiferana ◽  
Single Species ◽  
Species Competition ◽  
Numerical Examples ◽  
Competition Models ◽  
Forest Lands

Choristoneura Fumiferana is perilous defoliators of forest lands in North America and many countries in Europe. In this study, we consider mathematical models in ecology, epidemiology and bifurcation studies; the spruce budworm model and the population model with harvesting. The study is designed based on bifurcation analysis. In particular, the results support population thresholds necessary for survival in certain cases. In a series of numerical examples, the outcomes are presented graphically to compare with bifurcation results.

An Integrated Population Model for Harvest Management of Atlantic Brant

2021 ◽  
Author(s):  
Anthony J. Roberts ◽  
Joshua L. Dooley ◽  
Beth E. Ross ◽  
Theodore C. Nichols ◽  
James O. Leafloor ◽  
...  
Keyword(s):  
Population Model ◽  
Harvest Management ◽  
Integrated Population Model

scholarly journals Multispecies integrated population model reveals bottom‐up dynamics in a seabird predator–prey system

2021 ◽  
Author(s):  
Maud Quéroué ◽  
Christophe Barbraud ◽  
Frédéric Barraquand ◽  
Daniel Turek ◽  
Karine Delord ◽  
...  
Keyword(s):  
Population Model ◽  
Bottom Up ◽  
Predator Prey ◽  
Integrated Population Model ◽  
Prey System

scholarly journals Integrated population model reveals that kestrels breeding in nest boxes operate as a source population

Ecography ◽  
2019 ◽  
Vol 42 (12) ◽  
pp. 2122-2131 ◽  
Author(s):  
Rémi Fay ◽  
Stephanie Michler ◽  
Jacques Laesser ◽  
Michael Schaub
Keyword(s):  
Population Model ◽  
Source Population ◽  
Integrated Population Model ◽  
Nest Boxes

Integrated population model to improve knowledge and management of Idaho wolves

2018 ◽  
Vol 83 (1) ◽  
pp. 32-42 ◽  
Author(s):  
Jon S. Horne ◽  
David E. Ausband ◽  
Mark A. Hurley ◽  
Jennifer Struthers ◽  
Jodi E. Berg ◽  
...  
Keyword(s):  
Population Model ◽  
Integrated Population Model

The decline of the Spotted Flycatcher Muscicapa striata in the UK: an integrated population model

Ibis ◽  
2003 ◽  
Vol 145 (3) ◽  
pp. 400-412 ◽  
Author(s):  
S. N. Freeman ◽  
H. Q. P. Crick
Keyword(s):  
Population Model ◽  
Integrated Population Model ◽  
The Uk
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