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Virtual population analysis (vpa)
| Fisheries glossary |
An analysis of fish population numbers that uses the number of fish caught at various ages or lengths and an estimate of natural mortality to estimate fishing mortality in a cohort. it also provides a back estimate of the number of fish in a cohort at var
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Population, английский
- A definable set of individual units to which the findings from statistical examination of a sample subset are intended to be applied. the population will generally much outnumber the sample. in re-randomisation statistics the process of applying inference
- See stock.
- A collection of units being studied. units can be people, places, objects, epochs, drugs, procedures, or many other things. much of statistics is concerned with estimating numerical properties (parameters) of an entire population from a random sample of units from the population.
- A group or number of people living within a specified area or sharing similar characteristics (such as occupation or age).
- Население; народонаселение; генеральная совокупность (в выборочном наблюдении); популяция (биол)
- Население
- 1. the number of people living in a country or town population statistics show that the birth rate is slowing down. the government has decided to screen the whole population of the area. 2. the number of patients in hospital the hospital population in the area has fallen below 10,000.
- Популяция
- Население; популяция -
- Популяция. в клинических исследованиях совокупность субъектов, обладающих какими-либо одинаковыми признаками (пол, возраст, диагноз).
- Население; популяция
- Any group of individuals, usually of a single species, occupying a given area at the same time; groups of organisms with homologue (same) alleles. p. cycle: changes in the numbers of individuals in a population which repeatedly oscillate between periods of high and low density. p. density: allowing a mathematically precise reflection - pd. • absolute: pd = number of individuals/unit area or volume [1/m2] or [1/m3] • relative: pd allows only a simple comparison (pd <, =, >, ? etc.). p. dynamics: the variations in time and space in the sizes and densities of populations; distribution due to changing food resources - the stability of a population depends upon abiotic factors, intraspecific competition (density dependent), natality, mortality etc. p. ecology: the study of the variations in time and space in the sizes and densities of populations, and of the factors causing those variations. p. fluctuation: variations over time in the size of a population. p. growth: is zero, when the birth rate equals the death rate (see carrying capacity). nt+1 = nt + r nt, current number of individuals r = (natality + immigration) - (mortality+emigration) r, intrinsic rate of growth (see density) p. pyramid: a means of illustrating the age structure of a population diagrammatically, by placing the youngest age class at the base and stacking successive age classes above it. p. regulation : a tendency in a population for some factor to cause density to increase when it is low and to decrease nt, momentary number of individuals when it is high. n0, number of individuals at start
- Generally, a collection of individuals with common characteristics. in statistics, a potentially infinite collection of independent (->independence) units that include all units of a specified type with attention paid only to the agggregate (->aggregation) property of the collection. a sample of data drawn from this population is a subset of the units constituting this population and scientific generalizations from such samples are limited by the size of the population originally specified (->model, ->representation).
- The process of scanning content to compile and maintain an index.
- Fish of the same species inhabiting a specified geographic area.
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Simulation, английский
- An analysis that shows the production and harvest of fish using a group of equations to represent the fishery. it can be used to predict events in the fishery if certain factors change. see population dynamics.
- Equipment, electronic countermeasures имитатор электронных помех
- Моделирование; имитация
- Моделирование; копирование
- Programs electronically substitute media for the actual experience, but may be coupled with hands-on devices that help the learner to experience physical movement.
- Расчетная кривая
- The vice of counterfeiting illness or defect, for the purpose of being invalided.
- Моделирование
- An unobtrusive scientific method of inquiry involving experiments with a model rather than with the portion of reality this model represents (->representation). simulation is unobtrusive because it does not disturb the object of inquiry (except perhaps when an actor applies its results). inasmuch as all information provided by a simulation is already contained in the model, simulation is useful primarily when the model is no longer tractable by algebraical techniques. this becomes particularly important with large numbers of equations built into the model, with large numbers of parts interacting within the model, with large numbers of paths that need to be traced simultaneously and with large numbers of iterations required to approximate the results.
- The games subcategory containing games that simulate an experience, for example, microsoft flight simulator.
- Modeling the behaviors and conditions of the real world. soc - system on a chip. a single integrated circuit that integrates all or most components of a computer including cpu, memory, i/o and bus. may including devices such as wireless modems. contrast with motherboard-based pc architectures. examples of socs include apple m1, snapdragon, and armxxx chips.
- The use of a mathematical model to imitate a situation many times in order to estimate the likelihood of various possible outcomes. see: monte carlo simulation.
- A broad collection of methods used to study and analyze the behavior and performance of actual or theoretical systems. simulation provides a mechanism for predicting computationally useful functional properties of systems, including thermodynamic, thermochemical, spectroscopic, mechanical, and transport properties.
Harmful algal bloom (hab), английский
An algal bloom that produces toxins detrimental to plants and animals. scientists prefer this term to red tide, since not all algal blooms are harmful, nor do all algal blooms cause discoloration, and the blooms are not associated with tides.
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