Principles of Fisheries Management Exam 1

What is a fishery?

Site where fish raising takes place (does not have to be fish specifically)

What types of fisheries are there?

commercial, recreational, and subsistence

What are common fisheries management objectives?

biological, economic, recreational, and social

What are management challenges?

natural population variation, uncertainty, natural or human social systems, high demand on fishery/water resources, fish don’t follow management boundary

What are the characteristics of managed populations?

What are the major events that changed fisheries history?

1st industrialization, 2nd industrialization (cod wars 1-3)

What characterized the periods of change in fisheries history?

1st industrialization (developed ice making plants and canning), 2nd industrialization (advanced gear- echosounders, gill nets, etc)

How are marine fisheries managed?

MPAs- NOAA and treatys

How are inland fisheries managed?

by state level

What manages different fisheries?

state agencies, tribal governments, NOAA, Magnus-Stevens, etc

What is a fish stock?

populations/subpopulations of a single species

How do you identify a fish stock?

genetics, mark-recapture, movement, otolith chemistry, angler data, etc

What is fishery-independant data?

not coming from anglers- long term monitoring, sampling, research

What is fishery-dependant data?

data coming from anglers/fisheries themselves;

What is CPUE and why is it important?

Catch per unit effort- standard for measurements

Examples of passive gear:

fyke nets, trap nets, hoop nets, gill nets

Examples of active gear:

fishing poles, trawls, seines, electrofishing

Parameters for whole count population estimation:

knowledge of every fish in the population

Parameters for swept area population estimation:

total area, sum of area sampled, sum of catch

Parameters for mark-recapture population estimation:

marked originally, caught 2nd time, marked at second capture

Parameters for correlated life-stage approach:

eggs spawned, fecundity, ratio of females in population

Parameters for line transect:

study area, fish density, probability of seeing fish

Parameters for depletion:

catch in each effort

What are some common stocking methods?

trap/transfer, put and take, put/grow/take

What are the goals of fish stocking?

food, enhance current fishery, create new fishery, ecosystem manipulation

What are some things to consider before fish stocking?

predators, survival, what to stock, number/density, when/where, quality/genetics,