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Female reproductive biology of two sympatric incirrate octopod species, Adelieledone polymorpha (Robson 1930) and Pareledone turqueti (Joubin 1905) (Cephalopoda: Octopodidae), from South Georgia

Barratt, I.M.; Johnson, M.P.; Collins, M.A.; Allcock, A.L.. 2008 Female reproductive biology of two sympatric incirrate octopod species, Adelieledone polymorpha (Robson 1930) and Pareledone turqueti (Joubin 1905) (Cephalopoda: Octopodidae), from South Georgia. Polar Biology, 31 (5). 583-594. 10.1007/s00300-007-0392-x

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Abstract/Summary

The reproductive biology of two species of endemic Southern Ocean octopods was investigated around the sub-Antarctic islands of South Georgia and Shag Rocks. The females of both the species produce few, large eggs. This appears to be governed by phylogenetic constraint. No evidence was found for ontogenetic migration or seasonality associated with gonad maturation. Based on oocyte length frequency distributions and observations of oocyte development within the ovary, it is possible that both species could have either a single or multiple-batch spawning strategy. Pareledone turqueti ovaries contained fewer larger oocytes than those of Adefieledone polymorpha, which may help to reduce competition for resources immediately after hatching.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1007/s00300-007-0392-x
Programmes: BAS Programmes > Global Science in the Antarctic Context (2005-2009) > DISCOVERY 2010 - Integrating Southern Ocean Ecosystems into the Earth System
ISSN: 07224060
Additional Keywords: Cephalopods;
NORA Subject Terms: Zoology
Biology and Microbiology
Date made live: 17 Aug 2010 08:56
URI: http://nora.nerc.ac.uk/id/eprint/10118

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