Atlantic salmon juvenile migration in the riviere Saint-Jean, QC and the Gulf of Saint-Lawrence: effects of environmental variables and identification of migration pathways

Lefevre, M. A. (2011). Atlantic salmon juvenile migration in the riviere Saint-Jean, QC and the Gulf of Saint-Lawrence: effects of environmental variables and identification of migration pathways. https://scholar.acadiau.ca/islandora/object/theses:223

Search for this publication on Google Scholar

Details:

Title

Atlantic salmon juvenile migration in the riviere Saint-Jean, QC and the Gulf of Saint-Lawrence: effects of environmental variables and identification of migration pathways

Author
Lefevre, Marylise Andree
Call Number

LE3 .A278 2011

Date

2011

Supervisor

Stokesbury, Michael
Whoriskey, F.G.

Degree Grantor

Acadia University

Degree Name

Master of Science

Degree Level

Masters

Discipline

Biology

Affiliation

Biology

Abstract

Juvenile Atlantic salmon from the Rivière Saint-Jean (Quebec, North Shore) were acoustically tracked during their migration to sea for two consecutive years. The smolt migration began at water temperatures of 10°C. Mean smolt minimum swimming speeds ranged from 38.6-56.7 cm/s, but varied among the riverine, estuarine and marine ecosystems. Smolts travelled both night and day, but their movements became increasingly nocturnal as they reached the ocean. In the estuary, most smolts entered on ebbing tides and moved faster at night. Post-smolts moved rapidly away from the near shore environment and towards the centre of the Gulf of St. Lawrence. One tagged post-smolt was detected exiting the Gulf of St. Lawrence via the Strait of Belle Isle. There was no apparent linkage between the detection patterns of post-smolts and surface water temperatures or surface water currents close to shore. Post-smolts, however, appeared to orient to higher salinity.

Rights

The author retains copyright in this thesis. Any substantial copying or any other actions that exceed fair dealing or other exceptions in the Copyright Act require the permission of the author.

Permanent Link

https://scholar.acadiau.ca/islandora/object/theses:223

Bookmarks: