Fisheries

Question 1

Fishery definition

Answer 1

union of aquatic organisms and humans for sunsumptive purposes

Question 2

Do fisheries treat equatic organisms as an extractive resrouce

Answer 2

sometimes, could be non-extractive like catch and release

Question 3

Commercial fishery

Answer 3

extraction and sale of fish for consumptive purposes

Question 4

Commercial fishery techniques

Answer 4

bottom trawling
longline fishing
drift nets

Question 5

bottom trawling

Answer 5

long net on bottom of ocean like a plow

Question 6

what kind of habitat disturbance does bottom trawling create

Answer 6

suspension of sediments
increased water turbidity
reduces habitat heterogenetiy
resuspension of contaminats
impacts on food web
lots of bycatch

Question 7

What does increased water turbidity lead to

Answer 7

less photosynthesis

Question 8

What is habitat heterogeneity

Answer 8

nooks and crannies

Question 9

longline fishing

Answer 9

one line with many hooks on it

Question 10

what types of fish consist of the bycatch on longline fishing

Answer 10

migratory species

Question 11

drift nets

Answer 11

long nets on end of boat

Question 12

bycatch

Answer 12

part of the capture that is discarded at sea

Question 13

reasons for discarding

Answer 13

wrong species, size, sex
fish damaged
quota reached
lack of space

Question 14

capture =

Answer 14

catch + bycatch + released alive

Question 15

are recreational fisheries direct harvest

Answer 15

yes, the ppl thatt catch eat them

Question 16

does noise polluition affect fish

Answer 16

yes, lateral line and eardrums

Question 17

are lead sinkers poisionous to wildlife

Answer 17

yes

Question 18

elements of an angling event

Answer 18

capture
handling
release

Question 19

What trauma may you cause the fish when you capture it

Answer 19

increased lactic acid
increased blood glucose
disrupted osmotic balance
more chance of predation

Question 20

what does increased lactic acid do

Answer 20

Cramps

Question 21

why does the lactic acid plateau

Answer 21

fish gets tired
stops fighting = no cramping

Question 22

what does increased blood glucose mean

Answer 22

flight or flight

Question 23

Why does tissue damage play an important role in the survival of the fish

Answer 23

Infection
swimming impairment
feeding impairment
+ energy to maintenece = - energy to growth and reproduction

Question 24

Why does handling impact fish

Answer 24

slime removal
loss of scales
samage to fish
air exposure

Question 25

what does air exposure lead to

Answer 25

collapse and adhesion of gill filaments
compromises respiration
+ psychological disturbance
delays recovery
tissue damage
loss of equilibrium
eventually… death

Question 26

factors influencing loss of equilibrium

Answer 26

duration of air exposure
handling time

Question 27

Non lethal disturbances to fish

Answer 27

physiological
energetic
behavioral
fitness

Question 28

fishing induces selection

Answer 28

when a species is selected for based on their growth rate and body size

Question 29

which individuals are favored when doing fishing induces selection

Answer 29

slow growth rates
small body size

Question 30

What is the bycatch from bottomtrawling

Answer 30

any non target species on the ocean floro