B34842 Attachment A.pdf

Hoops and throats: 102 cm (40 inch) behind the second frame is the first of six 0.77m (30 inch) diameter 6.35 mm (0.25 inch) spring steel hoops (galvanized steel hoops are a suitable replacement) spaced 0.6 m (24 inches) apart with a 305mm (12 inch) square throat funnel (measuring 10 meshes long with an opening circumference of 30 meshes) strung from the first and terminating at the second hoop and secured to the third hoop with four 5/32 nylon ties; and a 102 mm (4 inch) finger style throat (measuring 9.5 meshes long with an opening circumference of 26 meshes) strung on the third hoop and ending approximately even with the fourth hoop and tied with twelve throat strings of 5/32 nylon extending to the cod “tail” end. See picture below:

Square and finger throat configuration (frame to the right, outside of picture).

FYKE AND GILL NET SPECIFICATIONS

Th e following four trap net designs are considered the standards for Illinois fish population assessments.

Item #1 & 2: 1.5 inch mesh trap net (4x6 frame) with 50' lead Frame: Two 1.22 x 1.83 m (4 x 6 foot) rectangular frames, constructed from 6.35 mm (0.25 inch) spring steel rod, each with a 4 foot center brace; frames 0.8 m (32 inches) apart with inwards mesh trap that tapers from the first frame to the second with a 254 mm (10 inch) wide vertical opening (i.e., 5 inches each side of center brace and lead attachment). See illustration below

Item #1 & 2 Illustration:

Item #1 & 2 Picture

Cod “tail” end: Purse string closure 0.61 m (24 inches; 10.5 meshes) from last hoop. Drawn tight with 6.35 mm (0.25 inch) braided nylon.

All netting: 38.1 mm (1.5 inch) bar #15 knotted to be strung on the diamond; mesh netting to be tied so as to be suspended from hoops and frames with a minimum of #15 nylon twine – netting not to be tied over hoops and frame; all netting treated with premium black net coating.

Lead: Single lead 15.24 m (50 feet) long and 1.22 m (4 feet) high of 38.1 mm (1.5 inch) bar #15 knotted mesh to be strung on the diamond; top and bottom lines 5/16 inch polypropylene rope with bottom having appropriate lead weights every 0.61 m (24 inches) and top line having one 3 inch (SB4) float every 0.9 m (36 inches); lead to be attached to center brace of both frames; lead treated with premium black net coating.

Item #1 & 2 Additional information:

Item #3 & 4: 1.0 inch mesh trap net (4x6 frame) with 50' lead Frame: Two 1.22 x 1.83 m (4 x 6 foot) rectangular frames, constructed from 6.35 mm (0.25 inch) sp ring steel rod, each with a 4 foot center brace. Frames 0.8 m (32 inches) apart with inwards mesh trap that tapers from the first frame to the second with a 203 mm (8 inch) wide vertical opening (i.e., 4 inches each side of center lead attachment). See illustration below

Hoops and throats: 76.2 cm (30 inch) behind the second frame is the first of five 0.77m (30 inch) diameter 6.35 mm (0.25 inch) spring steel hoops (galvanized steel hoops are a suitable replacement) spaced 0.6 m (24 inches) apart with a 254-305mm (10-12 inch) square throat funnel (measuring approximately 15 meshes long with an opening circumference of approximately 24- 30 meshes) strung between the first and second hoop with 5/32 nylon ties.

Cod end: Purse string closure 0.61 m (24 inches) from last hoop.

All netting: 25.4 mm (1.0 inch) bar #15 knot-less to be strung on the diamond; mesh netting to be tied so as to be suspended from hoops and frames with a minimum of #15 nylon twine – netting not to be tied over hoops and frame; all netting treated with premium black net coating.

Lead: Single lead 15.24 m (50 ft) long and 1.22 m (4ft) high of 25.4 mm (1.0 inch) bar #15 knot-less mesh to be strung on the diamond; top and bottom lines 5/16 inch polypropylene rope with bottom having appropriate lead weights every 0.61 m (24 inches) and top line having one 3 inch (SB4) float every 0.91 m (3 feet); lead to be attached to center brace of both frames; lead treated with premium black net coating.

Item #3 & 4 Illustration

Item #3 & 4 Additional information

Item 5 & 6: 0.5 inch mesh trap net (3x6 frame) with 50' lead Frame: Two 0.91 x 1.83 m (3 x 6 foot) rectangular frames, constructed from 6.35 mm (0.25 inch) sp ring steel rod, each with a 3 foot center brace. Frames 0.61 m (24 inches) apart with inwards mesh trap that tapers from the first frame to the second with a 102 mm (4 inch) wide vertical opening (i.e., 2 inches each side of center lead attachment).

Hoops and throats: 76.2 cm (30 inch) behind the second frame is the first of five 0.77m (30 inch) diameter 6.35 mm (0.25 inch) spring steel hoops (galvanized steel hoops are a suitable replacement) spaced 0.6 m (24 inches) apart with a 203 mm (8 inch) square throat funnel (measuring approximately 30 meshes long with an opening circumference to be determined in production) strung from the first and hoop and terminating at the second hoop and secured to the third hoop with four 5/32 nylon ties; a 51 mm (2 inch) finger style throat strung from the third hoop and ending even with the fourth hoop and tied with XX 5/32 nylon ties extending to the cod end.

Cod end: Purse string closure 0.61 m (24 inches) from last hoop.

All netting: 12.7 mm (0.5 inch) bar #15 knot-less to be strung on the diamond; mesh netting to be tied so as to be suspended from hoops and frames with a minimum of #15 nylon twine – netting not to be tied over hoops and frame; all netting treated with premium black net coating.

Lead: Single lead 15.24 m (50 ft) long and 0.91 m (3ft) high of 12.7 mm (0.5 inch) bar #15 knot-less mesh to be strung on the diamond; top and bottom lines 5/16 inch polypropylene rope with bottom having appropriate lead weights every 2 feet and top line having one 3 inch (SB4) float every 0.91 m (3 feet); lead to be attached to center brace of both frames; lead treated with premium black net coating.

Item #5 & 6 Illustration

Item #5 & 6 Additional Information

Item #7: Fiberglass 48" Hoop Net - 1.5" square mesh

Item #8: Experimental gill net

Experimental gill net, 125' in length, 6' height with 5 - 25' panels with the following mesh sizes for each 25' section; 0.50", 1.0", 1.5", 2.0" and 2.5". Weight of twine between 1.0# and 1.75#.

Additional information regarding number of leads per net, number of ties between leads, and number of meshes per tie will be determined by biologists during order.

Large Hoop Specifications