abundance index
Information obtained from samples or observations and used as a measure of the weight or number of fish which make up a stock.

Fisheries — dictionary. . 2004.

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  • abundance index — data obtained from samples or observations and used as a measure of the weight or number of fish which make up a stock, a segment of a stock such as spawners or in a given area. Most indices are relative units (as opposed to measuring absolute… …   Dictionary of ichthyology

  • abundance index — Information obtained from samples or observations and used as a measure of the weight or number of fish which make up a stock …   Fisheries — dictionary

  • abundance — index boom (prosperity), bulk, plethora, prosperity, quantity, quorum, spate, store ( …   Law dictionary

  • Abundance (ecology) — Abundance is an ecological concept referring to the relative representation of a species in a particular ecosystem. It is usually measured as the large number of individuals found per sample.Abundance is contrasted with, but typically correlates… …   Wikipedia

  • index of abundance — A relative measure of the abundance of a stock; e.g. a time series of catch per unit of effort data …   Fisheries — dictionary

  • index of abundance — a relative measure of the abundance of a stock, e.g. a time series of catch per unit of effort data …   Dictionary of ichthyology

  • index of biotic integrity — the use of fish sampling data to indicate the overall health and integrity of a stream. Measures of fish species composition, trophic composition, reproductive behaviour and abundance and condition are used. Sites with high biotic integrity have… …   Dictionary of ichthyology

  • Trophic state index — The quantities of nitrogen, phosphorus, and other biologically useful nutrients are the primary determinants of a body of water s trophic state index (TSI). Nutrients such as nitrogen and phosphorus tend to be limiting resources in standing water …   Wikipedia

  • Occupancy-abundance relationship — In macroecology, the occupancy abundance (O A) relationship is the relationship between the abundance of species and the size of their ranges within a region. This relationship is perhaps one of the most well documented relationships in… …   Wikipedia

  • Rank abundance curve — A rank abundance curve is a chart used by ecologists to display indicators of biodiversity specifically species richness and species evenness. This is achieved using the relative abundances of different species in a sample. Rank abundance curves… …   Wikipedia

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