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Age-at-maturity estimates for Atlantic coast female striped bass

Transactions of the American Fisheries Society

By:
, , ,
DOI: 10.1577/1548-8659(1995)124<0207:AAMEFA>2.3.CO;2

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Abstract

This study was undertaken to estimate the percentage of mature female striped bass Morone saxatilis present in each age-class during annual coastal feeding migration. Migratory striped bass (N = 302) were sampled in coastal Rhode Island waters during spring (May-June) and fall (September-November) from 1985 to 1987. Stocks were identified by analysis of morphometric characters and isoelectric focusing of eye-lens proteins. Histological sections of ovarian tissue were used to categorize maturity state. Fish were considered mature if a class of oocytes measuring at least 150 μm and containing cytoplasmic inclusions was found in the ovarian sections. All females whose age at next potential spawning was 7 and older were mature. Our empirical observations indicated that 12% of fish in age-class 4, 34% of fish in age-class 5, and 77% of fish in age-class 6 were mature. The estimate of the proportion of mature fish in age-class 5 differs significantly from that of Merriman (1941), who also examined coastal migrants. No significant differences were found in maturity estimates of fish from stocks of different origin.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Age-at-maturity estimates for Atlantic coast female striped bass
Series title:
Transactions of the American Fisheries Society
DOI:
10.1577/1548-8659(1995)124<0207:AAMEFA>2.3.CO;2
Volume
124
Issue:
2
Year Published:
1995
Language:
English
Publisher:
Taylor & Francis
Publisher location:
London, UK
Contributing office(s):
Great Lakes Science Center
Description:
8 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Transactions of the American Fisheries Society
First page:
207
Last page:
215
Number of Pages:
8