Fisheries And Aquaculture

Front 1

Fishery

Back 1

A particular stock plus the fishing activities relating to its harvest including fishermen, vessels gears and associated facilities.

Front 2

Population

Back 2

All the individuals of a given species in a given area

Front 3

Unit Stock

Back 3

Discrete population which has the same gene pool, is self-perpetuating and has little connection with adjacent populations]

Front 4

Fishery Dependent Data

Back 4

Logbooks maintained by vessels or or from inspections, on board observers or interviews

Front 5

Fishery Independent Data

Back 5

Data from surveys, experimental, fishing acoustic surveys, mark an recapture, genetic studies

Front 6

Maximum Sustainable Yield (MSY)

Back 6

The the largest long-term theoretical average catch or yield that can be taken from a stock

Front 7

Bmsy

Back 7

The biomass at the maximum sustainable yield

Front 8

Fmsy

Back 8

The effort at the maximum sustainable yield

Front 9

MEY

Back 9

Maximum Economic Yield occurs at half of the economic break point (where the revenue from a catch and the cost of he effort to catch are equal). This can be below the MSY if yield and cost have a linear relationship.

Front 10

Spawning Stock Biomass

Back 10

The stock population capable of reproducing. Can be affected by needing to get to a certain size/age before reproduction or phenology.

Front 11

Cohort

Back 11

A group of subjects that have shared a set of events over a particular time span.

Front 12

Surplus Production Model (SPM) or dynamic biomass model

Back 12

Works under the principle that fish produce more offspring than is needed to replenish themselves. The surplus can be harvested without endangering the population. The models consider biomass as a whole (no age structure is used)

Front 13

Virtual Population Analysis

Back 13

A way of keeping tack of age cohorts in a fishery. The catch at the terminal year (no fish are assumed to live past this) and work backwards each year adding M on until you get back to the earliest recruitment year.

Front 14

Yield per recruit model

Back 14

Used to address the problem: do you capture lots of young fish (occurs with high effort) or few old fish (occurs with low effort)?

Front 15

Recruitment

Back 15

The fish that are added into the fishery population from all the offspring.