Results 1 to 10 of about 5,420,243 (298)

The Age Structure of a Population of \u3ci\u3eAedes Provocans\u3c/i\u3e (Diptera: Culicidae) in Southwestern Ontario [PDF]

open access: yes, 2017
In a previous paper it was shown that an eastern-Ontario population of the early-spring mosquito Aedes provocans had an atypical age structure: the adult-female population aged rapidly and synchronously, achieving an advanced gonotrophic age in an ...
Kurtz, Richard M, Smith, Stephen M
core   +2 more sources

Genetic diversity and spatiotemporal population structure of Anopheles sinensis in the Republic of Korea based on the mitochondrial cytochrome c oxidase subunit I (COI) marker [PDF]

open access: yesOsong Public Health and Research Perspectives
Objectives Anopheles sinensis is a predominant malaria vector found throughout the Republic of Korea (ROK). Population genetic analysis can provide insights into the origins and migration patterns of malaria vectors by assessing genetic variation and ...
Haneul Jung   +5 more
doaj   +1 more source

Fluctuations and correlations in population models with age structure

open access: yes, 2000
We study the population profile in a simple discrete time model of population dynamics. Our model, which is closely related to certain ``bit-string'' models of evolution, incorporates competition for resources via a population dependent death probability,
Bernadelli H.   +3 more
core   +1 more source

Population genomic structure of the gelatinous zooplankton species Mnemiopsis leidyi in its nonindigenous range in the North Sea [PDF]

open access: yes, 2019
Nonindigenous species pose a major threat for coastal and estuarine ecosystems. Risk management requires genetic information to establish appropriate management units and infer introduction and dispersal routes. We investigated one of the most successful
Derycke, Sofie   +8 more
core   +1 more source

Survey on population size structure and density of Pinctada radiata in Iranian coast of the Persian Gulf

open access: yes‬‭Majallah-i ̒Ilmī-i Shīlāt-i Īrān, 1995
Population size structure and density of pearl oyster Pinctada radiata were surveyed in major pearl oyster beds along the Iranian coast of the Persian Gulf.
A. Jahangard; P. Rostaeian
doaj  

A review of methods for defining population structure in the harbour porpoise (Phocoena phocoena)

open access: yesNAMMCO Scientific Publications, 2003
Wide-ranging methods that have been used to determine population structure, including distribution, life history, biology, ecological factors such as diet and contaminant loads, morphology and genetics, are reviewed.
Christina Lockyer
doaj   +1 more source

Pedigree analysis on the population of Gir cattle in Northeast Brazil

open access: yesRevista Brasileira de Zootecnia, 2012
The objective of this study was to characterize the population genetic structure of the Gir breed in the Northeast of Brazil. The data used in this study were taken from pedigree information of 8,897 Gir animals between 1957 and 2007, obtained from the ...
Aracele Prates de Oliveira   +7 more
doaj   +1 more source

The Effect of Rainfall on the Population Densities and Community Structure of Birds in an Urbanized Zambezi Riparian Forest

open access: yesDiversity, 2023
The species which make up the avian community are governed by a multitude of environmental and internal influences, and the crucial role of community ecology is to discern and explain the patterns arising from these influences.
Grzegorz Kopij
doaj   +1 more source

Network analysis identifies weak and strong links in a metapopulation system [PDF]

open access: yes, 2008
The identification of key populations shaping the structure and connectivity of metapopulation systems is a major challenge in population ecology. The use of molecular markers in the theoretical framework of population genetics has allowed great advances
A. F. Rozenfeld   +18 more
core   +2 more sources

A 100-year Projection of Population Aging in Iran Through the Decomposition of Population Momentum [PDF]

open access: yesSālmand
Objectives In Iran, population aging is likely to continue with an increase in the number of older people in the upcoming decades. This study aims to provide a 100-year projection of Iran’s aging population by decomposing population momentum.
Nazanin Aghaei   +3 more
doaj  

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