Shoreline vegetation on herring spawning grounds between Deep Bay and Dorcas Point, Strait of Georgia, B.C. / by C.W. Haegele. : Fs97-4/1485E-PDF ; Fs97-4/1485
"The ability to accurately record and assess herring spawnings depends to a considerable degree on a knowledge of the vegetative substrate upon which the adhesive eggs are deposited. Large format colour and colour-infrared photographs were obtained for the shoreline between Deep Bay and Dorcas Point on April 7, 1977. Vegetation maps were prepared from these using colour and texture keys previously developed. Subsequently, between March 5 and April 11, 1978, a diver survey of herring spawnings in the study area was used to evaluate the accuracy of the photo-mapped vegetation. Divers collected 418 samples on 62 diving transects. Vegetation was identified on aerial photographs for 72% of these samples. For samples taken on herring spawn transects, vegetation was identified for 80% of samples. Vegetation not identified on photographs was always in deeper water and of low percent cover. There were 103 species of algae and sea grasses collected. The vegetation is commonly up to 600 m wide and the total area of vegetation identified from photographs is 6.2 x 10⁶ m² along 60 km of coastline"--Abstract, page iii.
Lien permanent pour cette publication :
publications.gc.ca/pub?id=9.932565&sl=1
| Ministère/Organisme | Canada. Fisheries and Marine Service, issuing body. Pacific Biological Station (1972- ), issuing body. |
|---|---|
| Titre | Shoreline vegetation on herring spawning grounds between Deep Bay and Dorcas Point, Strait of Georgia, B.C. / by C.W. Haegele. |
| Titre de la série | Fisheries and Marine Service manuscript report, 0701-7626 ; 1485 |
| Type de publication | Série - Voir l'enregistrement principal |
| Langue | [Anglais] |
| Format | Électronique |
| Document électronique | |
| Note(s) | ISSN of series should read 0701-7618. Digitized edition from print [produced by Department of Fisheries and Oceans]. Includes bibliographical references (page 9). Includes abstracts in English and French. |
| Information sur la publication | Nanaimo, British Columbia : Department of Fisheries and the Environment, Fisheries and Marine Service, Resource Services Branch, Pacific Biological Station, November 1978. ©1978 |
| Auteur / Contributeur | Haegele, C. W., author. |
| Description | 1 online resource (iv, 49 pages) : maps. |
| Numéro de catalogue |
|
| Descripteurs | Pacific herring -- Spawning -- Georgia, Strait of (B.C. and Wash.) Vegetation mapping -- Georgia, Strait of (B.C. and Wash.) Hareng du Pacifique -- Frai -- Géorgie, Détroit de (C.-B. et Wash.) Cartographie de la végétation -- Géorgie, Détroit de (C.-B. et Wash.) |
Demander des formats alternatifs
Pour demander une publication dans un format alternatif, remplissez le formulaire électronique des publications du gouvernement du Canada. Utilisez le champ du formulaire «question ou commentaire» pour spécifier la publication demandée.- Date de modification :