**maximum constant yield** — the maximum constant catch sustainable for all probable future levels of stock biomass … Dictionary of ichthyology

**Maximum sustainable yield** — In population ecology and economics, maximum sustainable yield or MSY is, theoretically, the largest yield (or catch) that can be taken from a species stock over an indefinite period. Fundamental to the notion of sustainable harvest, the concept… … Wikipedia

**Constant voltage speaker system** — Constant voltage speaker systems refer to networks of loudspeakers which are connected to an audio amplifier using step up and step down transformers to simplify impedance calculations and to minimize power loss over the speaker cables. They are… … Wikipedia

**Yield (engineering)** — The yield strength or yield point of a material is defined in engineering and materials science as the stress at which a material begins to deform plastically. Prior to the yield point the material will deform elastically and will return to its… … Wikipedia

**Nuclear weapon yield** — Logarithmic scatterplot comparing the yield (in kilotons) and weight (in kilograms) of all nuclear weapons developed by the United States. The explosive yield of a nuclear weapon is the amount of energy discharged when a nuclear weapon is… … Wikipedia

**E (mathematical constant)** — The mathematical constant e is the unique real number such that the function e x has the same value as the slope of the tangent line, for all values of x . [Keisler, H.J. [http://www.vias.org/calculus/08 exp log functions 03 01.html Derivatives… … Wikipedia

**e (mathematical constant)** — Euler s number redirects here. For γ, a constant in number theory, see Euler s constant. For other uses, see List of topics named after Leonhard Euler#Euler numbers. e is the unique number a, such that the derivative of the exponential function… … Wikipedia

**river** — river1 riverless, adj. riverlike, adj. /riv euhr/, n. 1. a natural stream of water of fairly large size flowing in a definite course or channel or series of diverging and converging channels. 2. a similar stream of something other than water: a… … Universalium

**Overfishing** — Atlantic cod stocks were severely overfished in the 1970s and 1980s, leading to their abrupt collapse in 1992 Overfishing … Wikipedia

**Population dynamics of fisheries** — A fishery is an area with an associated fish or aquatic population which is harvested for its commercial or recreational value. Fisheries can be wild or farmed. Population dynamics describes the ways in which a given population grows and shrinks… … Wikipedia