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Fisheries Science Test 2
Terms in this set (43)
What factors should be taken into account when determining sample size
-biological vs. statistical effects
-number of fish needed to be handled
Measuring from mouth to tail base
maximum standard length
Measuring from mouth to tail fork
Measuring entire fish with tail folded to longest length
maximum total length
how are species-specific lengths for stock, quality, trophy, etc. sizes determined?
Percentages of the world record length
Proportion stock density preferred sized fish
Proportion stock density preferred to memorable size fish
How many decimals should be reported when using incremental PSD?
How many decimals should be reported for traditional PSD?
Traditional or Incremental: PSD-T
Traditional or Incremental: PSD-P-T
Traditional or Incremental: PSD-Q-P
Traditional or Incremental: PSD-Q
Should mean weight/length for sexually mature fish be estimated alongside immature fish?
No! The difference in mature fish and immature may affect estimates of mean
Can you tell how many fish are in a population using PSD?
no, only proportion
stock recruit function is named after this guy
W.E. (Bill) Ricker
Fisheries jargon for birth inputs
Fisheries jargon for movement inputs
Fisheries jargon for death losses
Fisheries jargon for movement losses
quality, preferred, and trophy fish as overlap
the addition of new fish into the catchable, harvestable, or adult populations
Density dependent recruitment factor exmples
-year class strength
-spawning stock abundance
Density independent recruitment factor examples
Is recruitment determined by the young-of-year?
Farming type of fishery
Fishing type of fishery
Recruitment variability leads to
-abundant year classes
-high fishing catch rates
maximum recruitment per spawner
Stock recruit function is best produced by which model(s)
Is Z a finite or instantaneous rate?
Type of survivorship curve for fish/frogs
Finite mortality rate
mortality rate that is applied over a discrete period (like a year)
group of fish born in the same year
can you have multiple cohorts in a year class of fish?
what is the descending limb of a catch curve
fish that are fully recruited to the gear
what are 3 types of capture fisheries
What is the difference between a population in equilibrium and one in nonequilibrium?
-populations in equilibrium do not change annually
-populations in non-equilibrium vary annually
high coefficient of variation (CV)
makes abundance graphs less collected around the mean
Spawning potential ratio (SPR) ideal number for preventing overfishing
what does channelization do to the amount of habitat in a river