An Indirect Method of Estimating Maturation Rates of Cohorts of Capelin (Mallotus villosus)

J. E. Carscadden, G. H. Winters and D. S. Miller

Fisheries Research Branch, Department of Fisheries and Oceans
Northwest Atlantic Fisheries Centre, P. O. Box 5667
St. John's, Newfoundland, Canada A1C 5X1

Source - Journal of Northwest Atlantic Fishery Science, Volume 6(2): 135-140
ISSN-0250-6408

 

J. E. Carscadden, G. H. Winters and D. S. Miller. 1985. An Indirect Method of Estimating Maturation Rates of Cohorts of Capelin (Mallotus villosus). J. Northw. Atl. Fish. Sci. 6(2): 135-140. https://doi.org/10.2960/J.v6.a13

 

A method of calculating age-specific maturation rates for capelin (Mallotus villosus) off southern Labrador and northeastern Newfoundland from catch-per-unit-effort data is presented. The data indicate that most of the capelin have matured at age 4. Underestimates of the instantaneous rates of either natural mortality or spawning mortality result in overestimation of the proportions of mature capelin by age-group, and overestimates of these mortality rates result in underestimation of the proportions of mature fish. In all cases, the percent error in proportions of mature capelin by age-group is considerably less than the percent error in the natural mortality or spawning mortality rate.

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Language - English
Publisher - Northwest Atlantic Fisheries Organization (NAFO), Dartmouth, N.S., Canada
Publication Date - December 1985
Publication Type - Journal Article

Citation: J. E. Carscadden, G. H. Winters and D. S. Miller. 1985. An Indirect Method of Estimating Maturation Rates of Cohorts of Capelin (Mallotus villosus). J. Northw. Atl. Fish. Sci. 6(2): 135-140. https://doi.org/10.2960/J.v6.a13