fish stock
51fish crop — yield (1) catch in weight. Catch and yield are often used interchangeably. Amount of production per unit area over a given time. A measure of production. The sustainable yield is the quantity of fish which can be taken from a stock (usually on an …
52fish-crop — yield (1) catch in weight. Catch and yield are often used interchangeably. Amount of production per unit area over a given time. A measure of production. The sustainable yield is the quantity of fish which can be taken from a stock (usually on an …
53stock enhancement — release of hatchery raised fish to increase wild fish numbers in a stock …
54stock externality — the impact on a non targeted stock of fish caught when a targeted group of fish is harvested, cf. crowding externality …
55stock — (verb)) to add eggs, young or adults of a species to a body of water to increase the population of that species or growth rate of that or another species; (noun) 1) a distinct genetic population; (noun) 2) a population defined by movement pattern …
56stock assessment — determining the current and probable future abundance of commercial fish stocks through the collection and analysis of data from life history studies, environmental surveys and catch statistics. There are two main components, studying the biology …
57stock biomass — total weight of fish in a stock …
58stock number — total number of fish in a stock …
59stock reduction analysis — a stock assessment method that estimates the biomass of a fish population using catch history data, information on the productivity of the species and a time series of abundance indices such as catch per unit of effort …
60fish hatchery — a facility where fish eggs are hatched and the fry raised, esp. to stock lakes, streams, and ponds. [1880 85, Amer.] * * * …
