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Abstract

Abstract Laboratory and field studies suggest
that cephalopod growth occurs rapidly and is
linked to temperature throughout a short life
span. For giant squid such as Architeuthis, a
paucity of size-at-age data means that growth is
only inferred from isolated field specimens, based
on either statoliths or isotopic analyses of tissue.
In this study we apply simple growth models to
obtain projections of the life span required to
achieve the Architeuthis average body mass in
scenarios which include an energy balance
between rates of food intake and expenditure
on growth and metabolism. Although the analysis
shows that a wide range for the estimated life
span is possible, energy conservation suggests that
achievement of a larger size would be assisted by
slower exponential growth early on. The results
are compared with a sparse set of size-at-age data
obtained from male and female Architeuthis wild
specimens and possibly hint at some behavioural
differences between males and females.

Item Type:	Article
Authors/Creators:	Grist, EPM and Jackson, GD
Keywords:	Feeding and metabolic rates Simple two phase growth model Energy balance Architeuthis Giant squid Cephalopod growth Growth models
Journal or Publication Title:	Reviews in Fish Biology and Fisheries
Publisher:	Springer
ISSN:	0960-3166
DOI / ID Number:	10.1007/s11160-007-9046-x
Additional Information:	The original publication is available at www.springerlink.com
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