Seasonal maturity and size at age of Loligo pealeii in waters of southern New England

Seasonal maturity and size at age of Loligo pealeii in waters of southern New England This paper investigates patterns of size-at-age and of maturity-at-size and -age using data from opportunistic, seasonal collections of Loligo pealeii from fisheries and research surveys off southern New England during 1993–1997. We describe basic life history parameters, such as lifespan, size and age at 50% maturity, size at stage of sexual maturation, and growth rates by sex and hatch month. The results provide new quantitative information on the population structure of L. pealeii and provide evidence that the link between the inshore and offshore components of the stock may be more complicated than formerly believed. Age composition appeared to be stable throughout the year, except during autumn, with modal ages at capture of only 150–180 d. L. pealeii spawning was inferred to occur throughout the year based on observed ages. Direct age sampling of the inshore and offshore fisheries for L. pealeii showed that these seasonal fisheries likely interact and that each harvests squid spawned in the previous season. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png ICES Journal of Marine Science Oxford University Press

Seasonal maturity and size at age of Loligo pealeii in waters of southern New England

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Publisher
Oxford University Press
Copyright
© Published by Oxford University Press.
ISSN
1054-3139
eISSN
1095-9289
D.O.I.
10.1006/jmsc.2001.1076
Publisher site
See Article on Publisher Site

Abstract

This paper investigates patterns of size-at-age and of maturity-at-size and -age using data from opportunistic, seasonal collections of Loligo pealeii from fisheries and research surveys off southern New England during 1993–1997. We describe basic life history parameters, such as lifespan, size and age at 50% maturity, size at stage of sexual maturation, and growth rates by sex and hatch month. The results provide new quantitative information on the population structure of L. pealeii and provide evidence that the link between the inshore and offshore components of the stock may be more complicated than formerly believed. Age composition appeared to be stable throughout the year, except during autumn, with modal ages at capture of only 150–180 d. L. pealeii spawning was inferred to occur throughout the year based on observed ages. Direct age sampling of the inshore and offshore fisheries for L. pealeii showed that these seasonal fisheries likely interact and that each harvests squid spawned in the previous season.

Journal

ICES Journal of Marine ScienceOxford University Press

Published: Jan 1, 2001

Keywords: Loligo pealeii age growth hatching dates fisheries

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