Results 51 to 60 of about 7,497,770 (317)

Combining transient dynamics and logistic‐asymptotic growth to study the recovery of two seabird populations after rat eradication

open access: yesPopulation Ecology, EarlyView.
This study examines the demographic dynamics of two seabird populations on Tromelin Island, 15 years after the eradication of brown rats. The results indicate that these populations are in good health and are expected to continue growing until breeding sites are saturated in about a century.
Merlène Saunier   +6 more
wiley   +1 more source

The unpredictably eruptive dynamics of spruce budworm populations in eastern Canada

open access: yesPopulation Ecology, EarlyView.
We examine historical population data for spruce budworm from several locations through the period 1930–1997, and use density‐dependent recruitment curves to test whether the pattern of population growth over time is more consistent with Royama's (1984; Ecological Monographs 54:429–462) linear R(t) model of harmonic oscillation at Green River New ...
Barry J. Cooke, Jacques Régnière
wiley   +1 more source

PRINCIPAL COMPONENTS TO OVERCOME MULTICOLLINEARITY PROBLEM [PDF]

open access: yesOradea Journal of Business and Economics, 2019
The impact of ignoring collinearity among predictors is well documented in a statistical literature. An attempt has been made in this study to document application of Principal components as remedial solution to this problem.
Abubakari S.Gwelo
doaj  

Variance Component Decomposition for Growth Traits of the Bay Scallop (Argopecten irradians irradians)

open access: yesFrontiers in Marine Science, 2021
The bay scallop (Argopecten irradians irradians) is one of the most important shellfish species in China. Since their introduction into China, only mass selection has been used in bay scallop breeding.
Hengde Li   +7 more
doaj   +1 more source

Generalizibility of instructional and school effectiveness indicators across nations [PDF]

open access: yes, 1989
In a secondary analysis of the data base of the IEA second mathematics study, the association of school and instructional characteristics with mathematics achievement within and across 17 countries at the school and student level was investigated.
Pelgrum, W.J.   +2 more
core   +3 more sources

Network topology drives population temporal variability in experimental habitat networks

open access: yesPopulation Ecology, EarlyView.
Habitat patches connected by dispersal pathways form habitat networks. We explored how network topology affects population outcomes in laboratory experiments using a model species (Daphnia carinata). Central habitat nodes in complex lattice networks exhibited lower temporal variability in population sizes, suggesting they support more stable ...
Yiwen Xu   +3 more
wiley   +1 more source

Age-specific survival of male Golden-cheeked Warblers on the Fort Hood Military Reservation, Texas

open access: yesAvian Conservation and Ecology, 2014
Population models are essential components of large-scale conservation and management plans for the federally endangered Golden-cheeked Warbler (Setophaga chrysoparia; hereafter GCWA). However, existing models are based on vital rate estimates calculated
Adam Duarte   +4 more
doaj   +1 more source

Partitioning variance in reproductive success, within years and across lifetimes

open access: yesEcology and Evolution, 2023
Variance in reproductive success (sk2, with k = number of offspring) plays a large role in determining the rate of genetic drift and the scope within which selection acts. Various frameworks have been proposed to parse factors that contribute to sk2, but
Robin S. Waples
doaj   +1 more source

Controlling the Overfitting of Heritability in Genomic Selection through Cross Validation. [PDF]

open access: yes, 2017
In genomic selection (GS), all the markers across the entire genome are used to conduct marker-assisted selection such that each quantitative trait locus of complex trait is in linkage disequilibrium with at least one marker.
Jia, Zhenyu
core   +2 more sources

Geographic variation in walking activity in the red flour beetle Tribolium castaneum

open access: yesPopulation Ecology, EarlyView.
This study examined whether there is geographic variation in field populations, focusing on the moving activity in the red flour beetle Tribolium castaneum. Results showed significant differences in moving activity among field populations but no correlation with latitude or meteorological factors.
Kentarou Matsumura
wiley   +1 more source

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