An analysis of the reproductive pattern in the sea star astropecten irregularis (pennant) from the bristol channel

Grant, A. ORCID: and Tyler, P. A. (1985) An analysis of the reproductive pattern in the sea star astropecten irregularis (pennant) from the bristol channel. International Journal of Invertebrate Reproduction and Development, 9 (3). pp. 345-361. ISSN 0168-8170

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The reproductive cycle in Astropecten irregularis is described, making use of a range of statistical techniques detailed previously. Analysis of gonad weights proved more satisfactory than the use of gonad indices, as the latter are not independent of animal size. When examining the course of oogenesis, standardised residuals in an (R × C) contingency table are much easier to interpret than size/frequency polygons.  The species has an annual cycle with spawning in June or July, but the gonads are small even when the animals are gravid, and the annual cycle in gonad weights is more marked in males. Proliferation of oogonia may apparently occur at any time of year, and the ripe ovary contains many small, previtellogenic oocytes. There is an annual cycle of small magnitude in the size of the pyloric caecum, with a peak in December.

Item Type: Article
Uncontrolled Keywords: asteroidea,astropecten irregularis,reproductive cycles,statistical analysis,animal science and zoology,developmental biology,cell biology ,/dk/atira/pure/subjectarea/asjc/1100/1103
Faculty \ School: Faculty of Science > School of Environmental Sciences
UEA Research Groups: Faculty of Science > Research Centres > Centre for Ecology, Evolution and Conservation
Faculty of Science > Research Groups > Environmental Biology
Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences
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Depositing User: LivePure Connector
Date Deposited: 16 Jul 2022 17:31
Last Modified: 23 Oct 2022 03:59
DOI: 10.1080/01688170.1986.10510211

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