The impact of Chondrus dragraking on substrate stability in southwestern Nova Scotia / by G.J. Sharp and D.L. Roddick.: Fs70-8/80-69E-PDF
"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.
Permanent link to this Catalogue record:
publications.gc.ca/pub?id=9.872486&sl=0
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| Title | The impact of Chondrus dragraking on substrate stability in southwestern Nova Scotia / by G.J. Sharp and D.L. Roddick. |
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| Publication type | Monograph - View Master Record |
| Language | [English] |
| Format | Digital text |
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| Description | 1 online resource (iii, 14 pages) : illustrations, map. |
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