Results 21 to 30 of about 5,400,886 (261)

Changes in the age structure of the population in the settlements of Zajecar municipality [PDF]

open access: yesGlasnik Srpskog Geografskog Društva, 2009
The paper analyzes changes in age structure of 42 settlements of Zaječar community from aspects of total amount of population, population size, sort, type and the hypsometric zone they belong to. Statistical analysis done on a two census years (1971. and
Pavlović Sanja, Jančić Marijana
doaj   +1 more source

Discrete Time Optimal Harvesting of Fish Populations with Age Structure

open access: yesLetters in Biomathematics, 2014
We consider an optimal fishery harvesting problem using an age-structured population model with nonlinear recruitment. The motivating example is Atlantic Cod. The goal is to maximize the profit (total gain) of fishing.
Wandi Dine   +2 more
doaj   +1 more source

Representatives of Rosaceae Juss. in the various structure-functional types of decorative plantings of Kryvyi Rih city (Dnipropetrovsk region, Ukraine)

open access: yesІнтродукція Рослин, 2020
Objective – to define the diversity of Rosaceae representatives in parks and squares of Kryvyi Rih city and to evaluate their vitality, longevity and perspectives of further apply for landscaping of the region. Material and methods.
Y.S. Yukhimenko, I.I. Korshykov
doaj   +1 more source

Utilization life span of army guided rockets and reliability of inbuilt elements

open access: yesVojnotehnički Glasnik, 1995
In the article are analysed Army anti-armour and antiaircraft guided rockets and the correlation between the age of rockets, conditions for their storage, and the number of registered malfunctioning rockets is established.
Miroslav Savanović
doaj   +1 more source

Geographical Variation in Body Size in the Asian Common Toad (Duttaphrynus melanostictus)

open access: yesLife, 2023
The geographic variation in life-history traits of organisms and the mechanisms underlying adaptation are interesting ideas in evolutionary biology. This study investigated age and body size of the Asian common toad (Duttaphrynus melanostictus) among ...
Kunhao Zhang   +5 more
doaj   +1 more source

Shifting Sands: Examining and Mapping the Population Structure of Greece Through the Last Three Censuses

open access: yesEconomies
This paper aims to facilitate a more nuanced understanding of regional disparities in the population age structure at a local scale by applying a recent method for visualizing these disparities.
Kleomenis Kalogeropoulos   +3 more
doaj   +1 more source

The Age Structure of the Population in the Eastern Region of the Republic of Macedonia in Aspect of Spatial Planning [PDF]

open access: yesДемографија, 2014
The social trends in the country reflected the demographic conditions in the East region. The continued decline in fertility rate, together with the expected extended life span and in collaboration with migration movements, conditioned reduction of ...
Mirjanka Madzević   +2 more
doaj  

Structure and correlates of cognitive aging in a narrow age cohort [PDF]

open access: yes, 2014
Aging-related changes occur for multiple domains of cognitive functioning. An accumulating body of research indicates that, rather than representing statistically independent phenomena, aging-related cognitive changes are moderately to strongly ...
Briley, Daniel A   +3 more
core   +1 more source

Annual growth and age composition of the squat lobster Cervimunida johni off northern-central Chile (1996-97)

open access: yesScientia Marina, 2005
The MULTIFAN method was used to analyse a series of monthly length-frequency distributions of the squat lobster Cervimunida johni Porter (1903) (Galatheidae), for the estimation of growth and age composition in the fishing area off Coquimbo (29°59’S-71 ...
Hugo Arancibia   +2 more
doaj   +1 more source

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

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