000 02637cam  2200397zi 4500
006m     o  d f      
007cr |||||||||||
008190503s1980    nscab||#ob   f000 0 eng d
040 |aCaOODSP|beng|erda|cCaOODSP
041 |aeng|bfre
043 |an-cn-nf
0861 |aFs70-8/80-69E-PDF
1001 |aSharp, G. L., |eauthor.
24514|aThe impact of Chondrus dragraking on substrate stability in southwestern Nova Scotia / |cby G.J. Sharp and D.L. Roddick.
264 1|aHalifax, Nova Scotia : |bResource Branch, Department of Fisheries and Oceans, |c[1980].
300 |a1 online resource (iii, 14 pages) : |billustrations, map.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aCAFSAC research document ; |v80/69
500 |aCaption title.
500 |aAlso published as No. 1593 of series: Canadian manuscript report of fisheries and aquatic sciences (see Fs97-4/1593E-PDF).
500 |aDigitized edtion from print [produced by Department of Fisheries and Oceans].
500 |a"Not to be cited without permission of authors."
504 |aIncludes bibliographical references (page 14).
5203 |a"Dragrakes and handrakes are the Chondrus crispus harvesting tools in southwestern Nova Scotia. Reports of serious substrate damage by the dragrake prompted an extensive survey and experimental program by the Marine Plants Section of Resource Branch, Department of Fisheries and Oceans, in 1979. Dragrakes were found to overturn rocks up to 58 cm x 43 cm maximum dimensions. The total bottom disruption averaged 0.6% to 4.8% of the bottom area, reaching a maximum of 6.8%. Substrate disruption was cumulative - up to eight hours of dragging the same area. The average size of displaced rocks was constant (0.05-0.07 m 2 ) after the peak of harvesting effort. Dragraking was restricted to 43% of the commercial Chondrus beds surveyed and to 11% of the harvest effort. Damage to the resource was sufficient to recommend the development of new harvest methods and phasing out of the dragrake"--Abstract.
546 |aIncludes abstract in French.
69207|2gccst|aFisheries technology
7001 |aRoddick, D. L., |eauthor.
7101 |aCanada. |bDepartment of Fisheries and Oceans.
830#0|aCAFSAC research document (Canadian Atlantic Fisheries Scientific Advisory Committee)|v80/69|w(CaOODSP)9.869616
85640|qPDF|s1.03 MB|uhttps://publications.gc.ca/collections/collection_2019/mpo-dfo/Fs70-8-80-69-eng.pdf