Results of the 1986 and 1987 winter acoustic surveys of NAFO div. 4WX herring stocks / U. Buerkle. : Fs70-8/87-36E-PDF
"Results of the 1986 and 1987 winter acoustic surveys of herring are described and compared to results from the 1984 and 1985 surveys. The replicate surveys in 1986 and in 1987, were similar to those done in 1984 and 1985, and showed similar herring distributions. The herring were concentrated in varying numbers of fish patches in the southern portion and in the approaches to Chedabucto Bay, N.S. The fish patches changed shape and size with time and replicate surveys produced a wide range of estimates of acoustic abundance. The maximum acoustic estimate produced each year is taken as the best estimate of the quantity of fish present. The acoustic estimates are converted to herring biomass by a target strength estimate determined for in-situ herring in Denmark. Herring abundance detected by the surveys has increased since 1984 by about 23% per year"--Abstract, page 2.
Lien permanent pour cette publication :
publications.gc.ca/pub?id=9.895603&sl=1
| Ministère/Organisme | Canadian Atlantic Fisheries Scientific Advisory Committee, issuing body. Canada. Dept. of Fisheries and Oceans. Scotia-Fundy Region. Marine Fish Division, issuing body. |
|---|---|
| Titre | Results of the 1986 and 1987 winter acoustic surveys of NAFO div. 4WX herring stocks / U. Buerkle. |
| Titre de la série | CAFSAC research document ; no. 87/36 |
| Type de publication | Série - Voir l'enregistrement principal |
| Langue | [Anglais] |
| Format | Électronique |
| Document électronique | |
| Note(s) | Cover title. "Not to be cited without permission of the author." Includes bibliographical references (pages 6-7). Includes abstract and series statement in French. |
| Information sur la publication | [Dartmouth, N.S.] : Canadian Atlantic Fisheries Scientific Advisory Committee ; St. Andrews, New Brunswick, Canada : Department of Fisheries and Oceans, Marine Fish Division, Biological Station, [1987?] |
| Auteur / Contributeur | Buerkle, U., author. |
| Description | 1 online resource (19 pages) : maps, graphs. |
| Numéro de catalogue |
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| Descripteurs | Atlantic herring fisheries -- Scotian Shelf. Atlantic herring fisheries -- Fundy, Bay of. Fish stock assessment -- Scotian Shelf. Fish stock assessment -- Fundy, Bay of. Hareng -- Pêche commerciale -- Néo-écossaise, Plateforme. Hareng -- Pêche commerciale -- Fundy, Baie de. Ressources halieutiques -- Évaluation -- Néo-écossaise, Plateforme. Ressources halieutiques -- Évaluation -- Fundy, Baie de. |