6 Terms
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Fish farming
Of, or pertaining to the artificial mass cultivation of fish
Industry: Fishing
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Fish farming
heater
Fishing; Fish farming
A device to warm the aquarium water. They are available as submersible heaters, over-the-side heaters, and under tank coils.
instantaneous rate of fishing mortality
Fishing; Fish farming
When fishing and natural mortality act concurrently, F is equal to the instantaneous total mortality rate, multiplied by the ratio of fishing deaths to all deaths.
instantaneous rate of growth
Fishing; Fish farming
The natural logarithm of the ratio of final weigl1t to initial weight of a fish in a unit of time, usually a year. When applied collectively to all fish of a given age in a stock, the possibility of ...
instantaneous rate of mortality
Fishing; Fish farming
The natural logarithm (with sign changed) of the survival rate. The ratio of number of deaths per unit of time to population abundance during that time, if all deceased fish were to be immediately ...
instantaneous rate of natural mortality
Fishing; Fish farming
When natural and fishing mortality operate concurrently it is equal to the instantaneous total mortality rate, multiplied by the ratio of natural deaths to all deaths.
instantaneous rate of recruitment
Fishing; Fish farming
Number of fish that grow to catchable size per short interval of time, divided by the number of catchable fish already present at that time. Usually given on a yearly basis: that is, the figure just ...
instantaneous rate of surplus production
Fishing; Fish farming
Equal to rate of growth plus rate of recruitment less rate of natural mortality--all in terms of weight and on an instantaneous basis. In a "balanced" or equilibrium fishery, this increment replaces ...
