L. Savard, D. G. Parsons and D. M. Carlsson
Science Branch, Department of Fisheries and Oceans
Maurice Lamontagne Institute, P. O. Box 1000
Mont-Joli, Quebec, Canada G5H 3Z4
Source - Journal of Northwest Atlantic Fishery Science, Volume 16: 63-74
ISSN-0250-6408
Abstract
Shrimp (Pandalus borealis) length frequency distributions obtained during research surveys in Davis Strait (NAFO Subareas 0+1) from 1983 to 1987 were analyzed for age and growth. Samples were combined within year on the basis of their similarity using cluster analysis. Modal analyses were performed for males only, separating the distribution mixtures into normal components which were interpreted as ages 1 to 6, inclusive. Mean carapace lengths at these ages were estimated at 8.4, 12.3, 15.7, 18.5, 20.6 and 22.7 mm, respectively. Females were separated at ages 7 and 8+ on the basis of biological characteristics with mean lengths of 24.9 and 26.3 mm. A comparison of results from Davis Strait with those reported from other areas in the Northwest Atlantic showed increased longevity and slower growth in the north.
Language - English
Publisher - Northwest Atlantic Fisheries Organization (NAFO), Dartmouth, N.S., Canada
Publication Date - July 1994
Publication Type - Journal Article
Descriptors - age composition, Davis Strait, length frequency analyses, Pandalus borealis
Estimation of Age and Growth of Northern Shrimp (Pandalus borealis) in Davis Strait (NAFO Subareas 0+1) Using Cluster and Modal Analyses