Evidence of reduced growth rates of anchovy recruits off South Africa in 1989 and 1991.
Journal Article
1995
Permanent link to this Item
Authors
Journal Title
South African Journal of Marine Science (now African Journal of Marine Science)
Link to Journal
Journal ISSN
Volume Title
Publisher
Taylor and Francis
Publisher
University of Cape Town
License
Series
Abstract
The ages of anchovy recruits sampled during winter recruitment surveys in 1985, 1989 and 1991 were determined by counting the daily growth rings on their otoliths. The growth coefficients K calculated for recruits in 1989 (1,040) and 1991 (1,180) demonstrate substantially slower growth rates for these two year-classes than for the 1985 year-class (K = 1,745). Individual variation of length-at-age was highest in 1991 and lowest in 1989. As a result of the slower growth, fish of the same length were markedly older in 1989 and 1991 than in 1985. The results are discussed with reference to environmental conditions in the three years.
Description
Reference:
Waldron, M. E. (1995). Evidence of reduced growth rates of anchovy recruits off South Africa in 1989 and 1991. South african journal of marine science, 15(1), 263-267.