Practical

Question 1

why are fish important

Answer 1

economic and ecological facots

Question 2

why sample id

Answer 2

propulation censuses, ecosystems

Question 3

when moving fish to bucket you need to know how to (2)

Answer 3

CATCH AND MEASURE, ID

Question 4

2 key approaches to id a fish

Answer 4

meristics and morphometrics

Question 5

meristics

Answer 5

quantitative features of a fish- number of fins or scales, scales along the lateral line, gill rakers etc

Question 6

morphometrics

Answer 6

quantitative analysis of form, a concept that is size and shape

Question 7

KNOW ANATOMY OF FISH

Answer 7

-

Question 8

salmonoids and trout

Answer 8

has adipose fin
silver in overall appearance in ocean phase
single short soft rayed dorsal fin

Question 9

rockfish

Answer 9

strong spines in first dorsal fin, large scales
spines on head
large mouth
bass like

Question 10

flatfish

Answer 10

both eyes on one side of head
distinct rayed fins

Question 11

sharks rays and skates

Answer 11

very rough skin
several gill slits
fins w/o distinct fin rays

Question 12

tuna and mackerel

Answer 12

series of finlets ahead of tail on bith dorsal and ventral surfaces
body is bullet shaped

Question 13

billfish

Answer 13

super long and pointy nose

Question 14

surf perch

Answer 14

compressed laterallt
spiny dorssal fin

Question 15

siening

Answer 15

big net casting out and reeling in

Question 16

dipnet

Answer 16

pole with circle net on end

Question 17

where to measure to

Answer 17

the very end of the tail

Question 18

pumpkinseed features

Answer 18

orange spots, no lines

Question 19

bluegill features

Answer 19

stripes blue ish

Question 20

golden shiner

Answer 20

yellowey uniform color

Question 21

agnatha

Answer 21

jawless fishes

Question 22

2 groups of agnatha

Answer 22

lsmprey and hagfosh

Question 23

chondrichthyes

Answer 23

sharks, rays

Question 24

osteichthyes

Answer 24

bony fish

Question 25

characteristics of species

Answer 25

functional morphology, behavior, distribution

Question 26

fixed fishing gear

Answer 26

lift net fyke net hoop net traps

Question 27

active fishing gear

Answer 27

dredge beam trawl

Question 28

how will mobile pelagic species get caught

Answer 28

trap, mid water trawl, purse siene

Question 29

how will benthic sedentary fish get caught

Answer 29

bottom trawl

Question 30

what type of fish is caught in a bottom gillnet

Answer 30

benthic species- specific

Question 31

what type of fish is caught in a drift net

Answer 31

moving or migrating species

Question 32

what type of fish is caught in a gilnet

Answer 32

apecific species

Question 33

what type of fish is caught in a long line

Answer 33

migrating species

Question 34

what are otoliths used for for humans

Answer 34

migration, aging, elements in environment

Question 35

what are otoliths used for for fish

Answer 35

orentation

Question 36

life history of an eel

Answer 36

anadromous born in salt, live in fresh, spawn in salt in sargasso sea depends if they are European or north american to where they go to spawn

Question 37

survey designs

Answer 37

fixed, random, stratified random

Question 38

fixed survey design

Answer 38

same place, time, individual over time can be biased if results don't reflect population

Question 39

random survey design

Answer 39

equal chance of sampling any unit of the population this can be very lengthy because you need many many observations over time to have truly unbiased sampling

Question 40

stratified random sampling

Answer 40

equal chance of sampling any unit within subsets of populations not biased if equal differences between subsets

Question 41

if you were to do new england trawl surveys, how would you sample

Answer 41

stratified random sampling that varies by habitat and depth. beam trawl surveys length, weight, stomach contents, isotope sampling if resources allowed.

Question 42

if you were to use a purse seine, would you bait it

Answer 42

yes or use a radar to determine where the species is

Question 43

what do you need to make sure is consistent with a beam trawl

Answer 43

EVERYTHING but specifically doors, net sizing,

Question 44

why is e-shocking good at knowing which fish are in an area, but not good at knowing the total number of species?

Answer 44

The area of sampling is unknown it collects diverse species because it's not biased by size, weight, or preferred habitat necessarily

Question 45

should you put metal tags in the ocean

Answer 45

no- they will rust

Question 46

advantage of clipping fins for tagging

Answer 46

small area sampling no technology

Question 47

dart tag advantages

Answer 47

number ID to individual when recaptured then you can see how much it grows, where it went

Question 48

PIT Tags

Answer 48

EZ pass tag fish must pass through electrical field to be accounted for NO battery so small that they can be injected into most fish NO SALT WATER!!!!!!!!!!!!!!!!!!!!!!!!!!!

Question 49

acoustic tag

Answer 49

battery inside sends off pings that send off specified code for a fish VERY EXPENSIVE

Question 50

RFID radiofrequency identification

Answer 50

implanting tag into organism SURGERY lots of $