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  • DEMOGRAPHIC DATA EVALUATION. : FERTILITY MEASURES
    DEFINITION OF TERMS Fertility = Production of a live birth (natality) Infertility = Inability to produce a live birth Parity = Number of children born alive to a woman Gravidity = Number of pregnancies a woman has had whether or not they produce a live birth Fecundity = Physiological capacity to conceive (reproductive potential) Infecundity
  • PowerPoint Presentation
    Fertility and the family Fertility: Production of a live birth (natality) measured by number of children born to a woman Parity: Number of children born alive to a woman Gravidity: Number of pregnancies a woman has had whether or not they produce a live birth
  • PowerPoint Presentation
    Size: number of individuals in an area Growth Rate: Birth Rate (natality) - Death Rate (mortality) How many individuals are born vs how many die Birth rate (b) − death rate (d) = rate of natural increase (r) Three Key Features of Populations PRE-REPRODUCTIVE REPRODUCTIVE POST-REPRODUCTIVE Population of a Stable Country You decide!
  • PowerPoint Presentation
    Lag phase Logistic growth Mortality Natality Plateau phase Population density Age distribution
  • Slide 1
    Notes: [This should be review for fellows; here, we review basic principles of percentages, ratios, and rates; relevant measures for natality and mortality statistics are provided in more detail later] A ratio is generally used to indicate the relative size of one number compared with another number In this sense, the percentage can be a ratio
  • NCHS-BSC-Natality Update-Apr08
    Review of NCHS’ Natality Program an Update Stephanie J Ventura, MA Reproductive Statistics Branch Division of Vital Statistics Presented to the NCHS Board of Scientific Counselors, April 25, 2008 Conclusions of the Panel High level of consistent productivity despite staff and resource limitations (only 7 staff working on natality-related files in RSB) Production of several major complex
  • Population ecology - Diocesan College
    Many populations mix to form communities: consist of different species Recap The total number of individuals (a count) that makes up a population Size is influenced by 4 factors: Births (natality) Immigration (movement into an area) Deaths (mortality) Emigration (exiting an area)
  • ENVIRONMENTAL STUDIES POPULATION ECOLOGY
    Natality the birth rate It’s the production of new individuals by birth, hatching, germination or division POPULATION PARAMETERS Natality strategies R-STRATEGY Many offspring Low parental care and low chances of survival
  • Unit 7: Interactions of Living Things
    Examples include dirt, oxygen, water, rocks, sand, sunlight, etc Spatial Distribution of populations can be UNIFORM (Evenly spread out), RANDOM (No Pattern), OR CLUMPED (Small Groups) Population growth rate *The human population is currently around 7 billion people How fast a given population grows Factors that influence this are: Natality
  • Glencoe Biology - SCSD1
    The natality of a population is the birthrate in a given time period Population Dynamics Section 1 Population Ecology Exponential Growth Model Exponential growth occurs when the growth rate is proportional to the size of the population All populations grow exponentially until some limiting factor slows the population’s growth





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