Results 51 to 60 of about 9,451,562 (385)

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

Encouragement Policies and Productivity Indicators for Colombian SMEs Using Data Envelopment Analysis and Malmquist Indexes

open access: yesRevista CEA
Purpose: This study aimed to characterize the performance of Colombian Micro, Small, and Medium-sized Enterprises (MSMEs) in recent years, along with the legal framework and central public policies governing and promoting this business segment.
Manuel Eduardo García Camacho   +1 more
doaj   +1 more source

Yield management research through the analysis of scientific journals: preliminary results [PDF]

open access: yes, 2004
The aim of this paper is to analyse articles relating to Yield Management published in a selection of journals at international level during the period 1996-2002.
Chávez Miranda, María Esther   +1 more
core  

Strip yield modelling of fatigue crack under variable amplitude loading [PDF]

open access: yes, 2011
The results from 'strip yield' approach of the FASTRAN type models of plasticity induced crack closure effects of fatigue cracks subjected to variable amplitude loadings are presented. The strip yield results are compared with authors' finite element (FE)
Sinclair, Ian   +2 more
core   +1 more source

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

Utilising forest inventory data for biodiversity assessment

open access: yesEcological Indicators, 2021
Currently the paradigm of sustainable forest management is extended to a broad range of ecological, economic, and social forest functions and services. In particular, biodiversity becomes a more and more important issue in the forest planning processes ...
Michael Heym   +5 more
doaj  

The Inheritance of Yield and Yield Components of Five Wheat Hybrid Populations Under Drought Conditions [PDF]

open access: yes, 2007
The magnitude of genetic inheritance and expected genetic advance are important for the prediction of response to selection in diverse environments and provide the basis for planning and evaluating breeding programs.
Ahmed, N. (Nisar)   +3 more
core  

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

Robinia pseudoacacia L. Flower Analyzed by Using An Unmanned Aerial Vehicle (UAV)

open access: yesRemote Sensing, 2017
Tree flowers are important for flower–insect relationships, seeds, fruits, and honey production. Flowers are difficult to analyze, particularly in complex ecosystems such as forests.
Christin Carl   +4 more
doaj   +1 more source

Dendritic cells steering antigen and leukocyte traffic in lymph nodes

open access: yesFEBS Letters, EarlyView.
Dendritic cells are key players in the activation of T cells and their commitment to effector function. In this In a Nutshell Review, we will discuss how dendritic cells guide the trafficking of antigen and leukocytes in the lymph node, thus influencing T‐cell activation processes. Dendritic cells (DCs) play a central role in initiating and shaping the
Enrico Dotta   +3 more
wiley   +1 more source

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