. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 4(iU CALIFOKXIA FISH AND ( FIGURE 11. The needle tool, with needle and tag in place ready for tagging TEST OF MONOFILAMENT NYLON The material used for the experiments was rated at 15 pounds breaking' strength. Tensile strength tests on donhle strands of new nylon material, knotted as it wonld be for tagging pnrposes, develo]ied a breaking- stress at less tliaii .')() i)ouii(ls. The tests were expected to indicate which of two e
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 4(iU CALIFOKXIA FISH AND ( FIGURE 11. The needle tool, with needle and tag in place ready for tagging TEST OF MONOFILAMENT NYLON The material used for the experiments was rated at 15 pounds breaking' strength. Tensile strength tests on donhle strands of new nylon material, knotted as it wonld be for tagging pnrposes, develo]ied a breaking- stress at less tliaii .')() i)ouii(ls. The tests were expected to indicate which of two eoiiini(»nly used knots caused the greatest loss in material tensile strength, and whethei-or not material rccoNcrcd fi-oiii returned fish had dejireciated in quality. The (h)id)l(' sr|uare knot and the blood knot compaiMMl (piite closely in the tensile streiiglli tests. The blood knot appears to be slightly su|)eri(»i'. although breaking figures for both knots averaged approxi- mately 21 pounds. Two tests on n\lon I'ccovered from tagged fish gave slightly diffei-ent results. Nylon from a yelhnvtail that had been lield in an a(|nariuni for six weeks partt'd at a sti'ain of l2() pounds. This Avas a matei-ial lailure. The second test produced a failure at the blood knot, but this was at a 2(i-|)oun(l siraiii. The material for the second test was taken from a yellowtail Ihat had been at liberly for 172 days following tagging. In both cases the line was examined under a microscope and found to be slightly sci-atehed, hiil other damage oi" weakness could not be discovered. DISCUSSION .Monofilament nylon, properly handled in an a p|>i'opriate silnatioii, may lia\-e real \aliie for tlii' fisheries worker inx-ohcd in a tagging pro- gram, .\ylon is axailahle in a \iii-ii'1>- of forms, tensile strengths, diame- ters, and decrees of fjexihilitw ('lianges are constanlly iak'ing ]ilace Avithin. Please note that these images are extracted from scanned page images that may have b
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Keywords: ., bookauthorcaliforniadeptoffishandgame, bookauthorcaliforniafish
