Catch Estimation Worksheet

OMB Control No.: xxxx-xxxx
Expires on: mm/dd/yyyy
01/01/08

OBS/TRIP ID

NMFS FISHERIES OBSERVER PROGRAM

DATE LANDED mm/yy

CATCH ESTIMATION WORKSHEET
FISHING METHOD

HAUL #

CATCH ESTIMATION METHOD

** CATCH SHAPE, MEASUREMENTS & VOLUME
Comment and draw catch shape.

Picked

1

Weighed (Actual)

1

Shoveled

2

Volume to Volume

2

Deckloaded

3

Basket or Tote Count

3

Conveyor System

4

Captain

4

Rect./square (L x W x D)

1

L

W1

Combination (comment)

8

Tally

5

Trapezoidal ([(W 1 + W 2)]/2xLxD)

2

L

W1

Other (comment)
9
__________________

Visually Estimated

6

L

W

7

Triangular (L x W / 2 x D)
Circular (B r2 x D)

3

Cumulative Sum Method

4

r

HAUL NUMBERS WHERE

Combination (comment)

8

Oval (r1 x r2 x B x D)

5

r1

DECKLOADING OCCURRED

Other (comment)

9

Other/Combination (comment)

9

__________________

Are measurements the same as previous haul?
** VOL SUBSAMPLE CONTAINER

CONTAINERS USED

Orange Basket

1

Fish Tote
Other

r2

D

=

V

ft3

D

=

V

ft3

D

=

V

ft3

D

=

V

ft3

D

=

V

ft3

NO

0 ___

YES 1 ___

** TOTAL SUBSAMPLE VOLUME =

** SAMPLE WEIGHT MULTIPLIER ** PERCENT SUBSAMPLED

Volume of Subsample

Circular Shapes

1.47 ft3

# subsample containers used x

total catch vol / total subsamp vol

(total subsamp vol / total catch )

1 Basket = 1.47 ft 3

r = radius

2

2.65 ft3

volume of a subsample container

vol) x 100

2 Baskets = 2.94 ft 3

r = diameter / 2

9

ft3

3 Baskets = 4.41 ft 3

r1 = short radius

4 Baskets = 5.88 ft 3

r2 = long radius

5 Baskets = 7.35 ft 3

B = 3.14

Angular Shapes

Trapezoidal Shapes

A = area

W 1 = short width

V = volume

W 2 = long width

%

ft3

** SPECIES

W2

__________________

** # SUBSAMPLING

** SUBSAMP
WGT (lbs)

/

** SPECIES

** SUBSAMP COMMENTS
WGT (lbs)

W = width
D = catch depth

** Required only when using the volume to volume method.

288