Fish farming

Fish farming

Of, or pertaining to the artificial mass cultivation of fish

Contributors in Fish farming

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 ...

Internal philtres

Fishing; Fish farming

Any philtre operated inside the fish tank. under gravel philtres and sponge philtres are two examples of these.

Invertebrates

Fishing; Fish farming

These are animals without backbones. In freshwater aquaria only snails and crayfish/shrimp are generally available. For marine aquaria, many kinds of animals are available.