Variation in Maturation of Yellowtail flounder (Pleuronectes ferruginea) on the Grand Bank

Source - Journal of Northwest Atlantic Fishery Science, Volume 25: 47-59
ISSN-0250-6408

Walsh, S.J. and Morgan, M.J. 1999. Variation in Maturation of Yellowtail flounder (Pleuronectes ferruginea) on the Grand Bank. J. Northw. Atl. Fish. Sci. 25: 47-59. https://doi.org/10.2960/J.v25.a5

Variation in the maturation of both male and female yellowtail flounder (Limanda ferruginea) on the Grand Bank was evident from analyses carried out on a cohort basis. Exploration of the effects of population size, growth, mortality, cohort strength and bottom temperature on maturation was carried out through statistical analyses of life history data collected during annual spring bottom trawl surveys from 1984 to 1997. There was a pronounced declining trend in the onset of maturation in males but no directed trend in females. Increased growth of a cohort over its lifetime, increased growth in the year prior to maturation, increased mortality in adults and increased bottom temperatures all appear to exert some effect on maturation of one or both sexes. Population abundance did not appear to have any direct effect even though there has been a substantial decline in abundance during the study period which led to the implementation of a directed fishery moratorium in 1994. The significance of these findings is discussed in terms of life history theory.

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Language - English
Publisher - Northwest Atlantic Fisheries Organization (NAFO), Dartmouth, N.S., Canada
Publication Date - October 1999
Publication Type - Journal Article

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