AGRRA Equipment - Coral fun times

7/28/2019 AGRRA Equipment - Coral fun times

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Atlantic Gulf Rapid Reef Assessment

(AGRRA) Project

Survey Equipment Construction

Kenneth Marks and Judith Lang

Revision: 2012-10-01


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hacksaw

drill and assorted bits (e.g., 5 mm / 3/16; 6 mm / 1/4)

clipper pliers

screwdriver

soldering iron

metric measuring tape (or use metric fish survey tape reel)

Tools needed for equipment construction


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PVC tubing, inch internal diameter ( ID) ~ 2 mfemale threaded connector, ID 1male threaded connector, ID 190elbow, ID 4PVC cement < 100 gm / 4 oz.

braided 3/16 diameter leadcore rope at least 10.2 mbraided nylon cord at least 1 m

black vinyl electrical tape ~ 3 m

large cable ties ~ 15 (11 black)smaller colored cable ties 90

(preferably 2 colors, with 45 of one and 45 of the other)

carabiner (or other secure clip) 1

clipboard (or slate of similar size) 1

rubber bands up to 12braided nylon string (alternative for some rubber bands) ~ 75 cm

appropriate UW-BENTHOS datasheet 1 / dive

pencil at least 2

+ needed for each detai led benthosand cora lsurveyorflexible, 15 cm plastic ruler (or equivalent) 1

Needed for each benthossurveyor


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Benthos Survey Equipment

10 m transect line

meter pole25 25 cm quadrat

clipboard

UW BENTHOS

datasheet


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The two halves combine to make a

1-meter long measuring pole.

Will consist of two, marked poles.

Measuring Pole Construction

PVC tube, ID


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Use PVC cement to glue one end of a ID PVC tube to a threadedfemale connector.

When the glue has set, measure and cut the tube for a total length of

exactly 50 cm from the outer end of the connector.

50 cm total length

(Shown after addition of the 10-cm interval marks.)

female

connector


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femaleconnector

male

connector

threaded

firmly together

Glue a second PVC tube (must be at least 50 cm long) into a

male threaded connector.

Thread the male connector into the female connector (should be

firm, but not overly tight).

When the glue has set, measure and cut the second PVC tube

so the overall length of the combined pole is exactly 100 cm.


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Starting at the female connector end, wrap the tubes with

black vinyl electrical tape to make alternating 10-cm bands.

Add smaller 5-cm bands at each end of the meter pole.

female

connector

= black

male

connector

= unmarked10-cm

5-cm

5-cm


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When combined, both halves join to create a full 1-meter pole.

The pole half with the female connector is exactly 50 cm in total length.

The other half pole is slightly longer due to the protruding threads on

the male connector.

1 meter total length

50 cm

femaleconnector


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If desired, a cable tie can be looped through a

hole drilled in one end of the meter pole forattachment to a buoyancy compensator (BC).

cable tie


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Cut four pieces of ID PVC tube so the inner dimension of thequadrat will be 25 cm 25 cm.

Glue all joints of 90 elbows.

Try to make sure quadrat remains relatively flat while gluing together.

Quadrat Construction

25 cm

25 cm


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Drill several holes through the sides to allow water

penetration (otherwise quadrat will float).

Attach a carabiner (or other style of clip) through one

of the holes with several cable ties. Cut off the cable

tie tails as short as possible with clippers.

drilled

hole

clipped

cable ties


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300 ft spool of3/16 braided, leadcore rope, used for transectlines, may be sourced from commercial fishing supply companies

such as http://www.nylonnet.com (stock number: 20S).

Transect Line Construction


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Form a small eyelet at each end of the transect line and secure it with several,

very tight cable ties. Tighten cable ties with a pair of pliers and clip off the tails.

Cut pieces of braided nylon cord (each about 50 cm long) and tie their ends

together to form a loop. Secure to each end of the transect line as shown.

clipped cable ties

braided nylon cord


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These loops will be useful for securing the transect line to the

substratum by looping over a protuberance (not live coral).

loop of braided nylon cord

eyelet at end of

transect line


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Loop a large black cable tie for the 0-m mark at one end of the transect line.

Measure out and add additional black ties every meter up to the final 10-m

mark near the other end of the transect line (for a total of 11 cable ties).

Tighten each cable tie with pliers to secure its location, and clip its tail.

clipped cable tie

meter mark


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Measure out, and add smaller, colored cable ties every 10 cm between the 11

black meter marks (for a total of 90 colored cable ties). If possible, use two

colors that alternate every meter for ease of use underwater.

Tighten all colored cable ties with pliers and clip their tails.

When possible, melt the clipped ends of the cable ties with a soldering iron (or

equivalent) to remove sharp edges that can otherwise scratch or cut surveyors.

meter markclipped cable tie

10-cm mark

10 cm


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0 m

2 m

4 m

6 m

8 m

10 m

1 m

3 m

5 m

7 m

9 m

10 cm20 cm 30 cm 40 cm

50 cm 60 cm 70 cm80 cm

90 cm

braided cord loops at

each end of transect line

large black cable ties

at 1-meter intervals

small colored cable ties at 10-cm intervals,

when possible two colors that alternate every

meter for convenience of benthic surveyors.

unusually long tail


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vent hole

Attach the loop at one end of the transect line to the carabiner.

(Note vent holes drilled in quadrat to keep it from floating.)

vent holesloop clipped

to caribiner


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Wind the transect line around the quadrat to keep it from tangling.


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Secure the free end of the transect line with a simple looping knot.

loop knot

Cli b d E l


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Clipboard Example

Either attach 2 mechanical pencils withrubber bands or braided nylon string to a

metal or plastic clipboard (or slate of about

23 cm 30 cm 9 12), or attach onepencil and carry a spare in a secure

location (BC pocket or tucked into wetsuit).Detai led benthic su rveys:

attach a flexible, 15 cm plastic ruler

(from Fisher Scientific) with its tip cut into

a point at the 0 cm mark.

Secure the appropriate UW BENTHOS

datasheet to the clipboard with rubber

bands.


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Slide clipboard and meter stick between

transect line loops for ease of transport.


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TIP: Surveyors should wear spare rubber bands around their wrists to

replace any that break during a dive. And dont forget the spare pencils!

C l S E i t


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Coral Survey EquipmentSame as the detailed benthossurvey equipment, except that the transect line

only needs marking with black cable ties at every meter.

If funds permit, marking all transect lines with both black and colored cable tiesallows each line to be used interchangeably for benthic or corals surveys.

Substitute the appropriateUW CORAL datasheet!


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PVC tubing, inch internal diameter ( ID) ~1.6 mT-connector, ID 1

45 elbow, ID 1PVC cement < 100 gm / 4 oz.braided nylon cord at least 40 cm / 15black vinyl electrical tape ~ 400 cm / 150fiberglass tape reel, 30 m / 100 ft 1

diving weight, 0.5-1 kilo / 1-2 lb 1

large cable ties at least 4

carabiner (or other secure clip) 1REEF slate (or any ~ 15 cm 23 cm 6 9 slate) 1stainless steel pan-head Phillips drive machine screws 2 of each

and nylon insert lock nuts, 4 mm 40 mm / # 8-32 1

stainless steel washers to fit the screws at least 4rubber bands ~ 4-6

appropriate UW FISH datasheet 1-2 / dive

(varies with number of transects for each surveyor)

pencil at least 2

D-ring or clamp (attached to BC or weight belt) 1

Needed for each f ishsurveyor

Fi h S E i t


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1 meter total width

Marked off in alternating 10-cmbands with black vinyl electrical tape.

Fish Survey Equipment

transect tape

T-bar

slate with

UW- FISH

datasheet

Fi h T B C t ti


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Fish T-Bar ConstructionGlue the base of a T-connector to one end of a ID PVC tube that isabout 60-cm long (will become the center bar).

Insert a piece of PVC tube that is > 50 cm long into each side of theT-connector (will become the arms). DO NOT GLUE! Measure and cut

each arm to a length of exactly 50 cm from the center of the connector.

Wrap side arms and part of the T-connector with black vinyl electrical

tape to make alternating 10-cm bands.

50-cm side arm

T-connector electrical tape

center bar


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T-connector glued

to center barbraided cord

hole

knot

Drill a hole at the inner end of each side arm.

Push the end of a reel of braided nylon cord (or at least ~40 cm / 15)through one of the side arm holes. (If a loose piece, secure with a knot.)

Pull the cord from the end of this side arm and then push it through the

T-connector. Using a loop of monofilament fishing line or other string

inserted through the hole in the second arm will help in fishing the cord

out through the second hole.

Cut the cord to length, allowing the side arms to hang beside the center

bar, and secure the loose end(s) of the cord with a knot.


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Glue a 45 elbow to the base of the center bar to make a more

comfortable handle than just the cut end of the PVC tube.

handle

(upper side) handle

(lower side)


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Drills holes about 1 cm from the top and bottom edges along the midline of

a REEF slate (or any 15 cm 23 cm 6 9 slate) large enough to insert4 mm / # 8-32 pan-head Phillips drive machine screws.

Position the slate with its bottom edge ~ 7.5 cm / 3 above the 45elbow on

the handle and use the holes drilled in the slate to mark the placement of

holes to drill through the top and bottom of the center bar.

Attachment Hardware Side View

washersnylon insert lock nut

head end of a pan-head Phillips drive machine screw


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Position the slate on top of the center bar and insert the pan-head

Phillips drive machine screws through the holes drilled in the slate

and through the PVC tube. Using washers will help prevent the

slate from cracking at the attachment points.

handle

REEF slatepan-head of a Phillips

drive machine screw

and two washers

Top View

~ 7.5 cm / 3

S h ith t hi l i t l k t th


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Bottom View

Secure each screw with a matching nylon insert lock nut on the

underside of the center bar, and tighten with a screwdriver.

Note: Cable ties (not shown) can be used to attach the slate to the

center bar if stainless hardware is difficult to obtain.

Wrap several rubber bands around the slate to hold survey sheets.

rubber bands

nylon insert lock nuts

Top View


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The appropriate FISH-UW

datasheets (when folded) fitperfectly on a REEF slate

(or one of equivalent size).

Tuck at least as many data

sheets as needed to conduct

one survey under rubberbands.

Use as many rubber bands

as needed to secure the

sheets top and bottom.

TIP: Wear spare rubber

bands around your wrist to

replace any that break

during a dive.

Top View

rubber band

P ll th id t f th T t f ld th


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Pull the side arms out of the T-connector, fold them

down along center bar, and tuck them under the

rubber bands for convenience in transit and storage.

The side arms can be quickly released and inserted

into the T-connector at the start of a survey dive.


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Att h ll 0 5 1 kil / 1 2 lb di i i ht t th d f th


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Attach a small 0.5-1 kilo / 1-2 lb diving weight to the end of the

tape using several cable ties. Tighten and clip the cable ties.

weight

clipped

cable ties

Attach a clip or carabiner to the handle of the tape reel ith


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Attach a clip or carabiner to the handle of the tape reel with

several cable ties that are tightened and clipped.

This will allow the tape reel to be clipped to a D-ring or clamp on

a BC or weight belt, allowing hands-free unreeling of the tape.

brass clipclipped cable ties

Detai led Fish Surveys: Use a permanent marker to place a band


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Detai led Fish Surveys:Use a permanent marker to place a band

on both sides of the tape at the six points where the Max. Relief

measurements will be made along the transect line.

The tape will twist underwater so marking both sides will make sure

the point is always visible.

On metric tapes, put bands by the 4, 8, 12, 16, 20, and 24 m marks.

On imperial marked tapes, put bands by the 15, 30, 45, 60, 75, and

90 ft marks.

Note: marking all transect tapes allows each to be usedinterchangeably for both basicand detailedfish surveys.

AGRRA Equipment - Coral fun times

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