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040 |aCaOODSP|beng|erda|cCaOODSP
0410 |aeng|beng|bfre
043 |an-cn-bc|apn-----
045 |ax8x8
0861 |aFs97-4/2046E-PDF|zFs97-4/2046E
1001 |aMatthews, K. R., |eauthor.
24510|aExperimental gill net fishing on trawlable and untrawlable areas off northwestern Vancouver Island, from the MV Caledonian, August 15-28, 1989 / |cby K.R. Matthews, J.R. Candy, L J. Richards, and C.M. Hand.
264 1|aNanaimo, British Columbia : |bDepartment of Fisheries and Oceans, Biological Sciences Branch, Pacific Biological Station, |cDecember 1989.
264 4|c©1989
300 |a1 online resource (iv, 78 pages) : |billustrations, map.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aCanadian manuscript report of fisheries and aquatic sciences, |y0706-6473 ; |vno. 2046
500 |aDigitized edition from print [produced by Department of Fisheries and Oceans].
504 |aIncludes bibliographical references (page 6).
5203 |a"This report summarizes cruise results from a fishing vessel operating off northwestern Vancouver Island between August 15-28, 1989. The purpose of the survey was to describe rockfish communities on hard (untrawlable) bottom and compare them to those found on smooth-bottom (trawlable) areas. In order to fish hard-bottom areas, the MV CALEDONIAN, a chartered commercial trawl vessel, deployed and retrieved sunken gill nets. Fishing was conducted on the continental slope between 200-300 m on two habitat types: hard-bottom habitat considered untrawlable and smooth-bottom habitat typical of trawlable areas used by commercial trawlers. Species composition differed between the two areas. Catches on untrawlable bottom included lingcod Ophiodon elongatus, thornyhead Sebastolobus alascanus, and 13 rockfish species but were dominated by four species: sharpchin rockfish Sebastes zacentrus (70%), red-banded rockfish S. babcocki (4%), greenstriped rockfish S. elongatus (4%), and bocaccio S. paucispinis (4%). Although the same number of species were caught on trawlable bottom, catches were dominated by Pacific ocean perch Sebastes alutus (37%), splitnose rockfish S. diploproa (23%), greenstriped rockfish (13%), and bocaccio (7%). In addition, significantly more fish per set were caught on hard-bottom (untrawlable) areas: 78.3 fish (rockfish and lingcod)/set on untrawlable bottom, compared to 31.0 fish/set on trawlable bottom. Differences in numbers/set and species composition indicate differences in fish assemblages in the two areas"--Abstract, page iii.
546 |aIncludes abstracts in English and French.
650 0|aSebastes|zBritish Columbia|zPacific Coast.
650 0|aSebastes populations|zBritish Columbia|zPacific Coast.
650 0|aFish surveys|zBritish Columbia|zPacific Coast.
650 0|aGillnetting|zBritish Columbia|zPacific Coast.
650 6|aSébastes|zColombie-Britannique|zPacifique, Côte du.
650 6|aSébastes|xPopulations|zColombie-Britannique|zPacifique, Côte du.
650 6|aInventaires ichtyologiques|zColombie-Britannique|zPacifique, Côte du.
650 6|aPêche au filet maillant|zColombie-Britannique|zPacifique, Côte du.
7101 |aCanada. |bDepartment of Fisheries and Oceans, |eissuing body.
7102 |aPacific Biological Station (1972- ), |eissuing body.
830#0|aCanadian manuscript report of fisheries and aquatic sciences ;|vno. 2046.|w(CaOODSP)9.505211
85640|qPDF|s1.57 MB|uhttps://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-4/Fs97-4-2046-eng.pdf