Some observations on the biomass and abundance of fish captured during stratified random bottom trawl surveys in NAFO Divisions 2J3KL, fall 1981-1991 / by D.B. Atkinson.: Fs70-8/92-72E-PDF
"Questions have been raised as to whether the observed declines in biomass of cod in NAFO Div. 2K3KL have been compensated for by increases in biomass of other species of marine life. This study examined the biomass of various fish species captured during annual fall research vessel surveys to see if increases coinciding with the decline in cod biomass could be detected. Declines in biomass were observed for all species examined. In most cases, the declines were greater than that for cod, and the proportion of cod biomass to total biomass showed some increase over time, particularly in Div. 2J. The declines in biomass were paralleled in most cases, by declines in abundance. It is still possible that compensatory increases in biomass have taken place in Div. 2J3KL in pelagic fish species, or non-fish species"--Abstract, page 1.
Permanent link to this Catalogue record:
publications.gc.ca/pub?id=9.869628&sl=0
| Department/Agency | Canada. Department of Fisheries and Oceans. |
|---|---|
| Title | Some observations on the biomass and abundance of fish captured during stratified random bottom trawl surveys in NAFO Divisions 2J3KL, fall 1981-1991 / by D.B. Atkinson. |
| Series title | CAFSAC research document = CSCPCA document de recherche ; 92/72 |
| Publication type | Series - View Master Record |
| Language | [English] |
| Format | Electronic |
| Electronic document | |
| Note(s) | Digitized edtion from print [produced by Department of Fisheries and Oceans]. "Not to be cited without permission of the authors." Includes bibliographical references (page 4). Includes abstract in French. |
| Publishing information | St. John's, Newfoundland : Science Branch, Department of Fisheries and Oceans,[1992] |
| Author / Contributor | Atkinson, D. B., author. |
| Description | 1 online resource (42 pages) : illustrations, maps. |
| Catalogue number |
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| Subject terms | Fisheries Salt water fish Surveys |