Comparison of the Growth of Northern Shrimp (Pandalus borealis) from Four Regions of the Northwest Atlantic D. G. Parsons, V. L. Mercer and P. J. Veitch
Department of Fisheries and Oceans, Science Branch
Northwest Atlantic Fisheries Centre, P. O. Box 5667, St. John's, Newfoundland, Canada A1C 5X1
Source - Journal of Northwest Atlantic Fishery Science, Volume 9(2): 123-131
ISSN-0250-6408
Modal analyses of carapace length frequencies and interpretation of biological data for the northern shrimp (Pandalus borealis) indicate variation in both age at sex change and growth rate for some Northwest Atlantic populations. The first female age (the species is protendrous) varied from 6 in the southernmost area to 7 and possibly 8 in more northerly areas. The observed differences could not be related to differences in environmental temperature. Overlapping of modes in the length frequency data was severe in many cases, possibly obscuring an additional mode (age group) in the Davis Strait data. The assumption that sex change occurs at a specific age and the choice of appropriate models and statistical analyses to describe growth require further study.
Language - English
Publisher - Northwest Atlantic Fisheries Organization (NAFO), Dartmouth, N.S., Canada
Publication Date - December 1989
Publication Type - Journal Article
Descriptors - age composition, Atlantic Ocean, NW, growth, shrimp