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Regional and Temporal Variations in Fecundity of Capelin in Newfoundland Waters
Author(s) -
Nakashima Brian S.
Publication year - 1987
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1987)116<864:ratvif>2.0.co;2
Subject(s) - fecundity , capelin , biology , mallotus , sampling (signal processing) , stock (firearms) , fishery , ecology , geography , fish <actinopterygii> , demography , population , archaeology , filter (signal processing) , computer science , sociology , predation , computer vision
Fecundity samples were collected in different years from three known stocks of capelin Mallotus villosus to explore regional and temporal variations in fecundity. Variation among sampling sites within the division 3L stock area, southeast of Newfoundland, was attributed to sampling error due to differences in sampling gear employed. Consequently, cast‐net samples were removed from the analysis. Log‐linear regressions of fecundity on length were calculated for each stock and each year. Interyear and interstock differences were tested by analysis of covariance. For all comparisons, slopes were not significantly different; however, significant differences were detected among some intercepts. Interstock differences were significant in 1985 but insignificant in 1974, 1981, and 1982. For all three capelin stocks, interyear differences were significant. Interyear differences in fecundity were not density‐dependent.