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Reproductive status of Octopus pallidus, and its relationship to age and size

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Leporati, S and Pecl, GT and Semmens, JM (2008) Reproductive status of Octopus pallidus, and its relationship to age and size. Marine Biology: international journal on life in oceans and coastal waters, 155 (4). pp. 375-385. ISSN 0025-3162

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Abstract

Age-specific information on individual octopus reproductive development and investment from wild populations has until recently been unobtainable. Using daily-formed increments within stylets (internal shells) the individual ages of 503 wild Octopus pallidus were determined. In addition, detailed reproductive information was collected for each of the aged octopus, along with reproductive data for an additional 925 octopus. All of the octopus were collected from Bass Strait waters in south-eastern Australia from November 2004 to November 2006. This information was used to investigate seasonal trends in reproductive scheduling and investment, fecundity and egg size. Maturation in O. pallidus primarily depends on size with little relationship to age and is highly variable between genders, with females >350 days still maturing in comparison to all males >142 days being mature. Size at 50% maturity for females was approximately 473 g, which is considerably larger than male 100% maturity at <250 g. This indicates that for females at least, maturity does not necessarily come with age. Seasonal scheduling in reproductive investment between genders revealed an optimal spawning period between late summer and early autumn. These results reinforce the view that individual growth and maturity is highly variable in cephalopods.

Item Type: Article
Journal or Publication Title: Marine Biology: international journal on life in oceans and coastal waters
Page Range: pp. 375-385
ISSN: 0025-3162
Identification Number - DOI: 10.1007/s00227-008-1033-9
Additional Information: The original publication is available at www.springerlink.com
Date Deposited: 23 Sep 2008 04:38
Last Modified: 18 Nov 2014 03:50
URI: http://eprints.utas.edu.au/id/eprint/7649
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