Gametogenic development and spawning of the razor clam, Zenatia acinaces in northeastern New Zealand

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Show simple item record Gribben, Paul en_US 2009-06-26T04:11:10Z 2009-06-26T04:11:10Z 2005 en_US
dc.identifier 2006012027 en_US
dc.identifier.citation Gribben Paul 2005, 'Gametogenic development and spawning of the razor clam, Zenatia acinaces in northeastern New Zealand', RSNZ Publishing, vol. 39, no. 6, pp. 1287-1296. en_US
dc.identifier.issn 0028-8330 en_US
dc.identifier.other C1UNSUBMIT en_US
dc.description.abstract The potential exists for New Zealand to exploit already established markets for razor clams through development of fisheries or aquaculture industries for the nNew Zealand razor clam, Zenatia acinaces. However, fishery or aquaculture development for Z. acinaces requires an understanding of the reproductive cycle including the timing of gametogenic development and spawning. The reproductive cycle of Z. acinaces was studied over an 11-month period from May 2000 to March 2001 at Kennedy Bay, Coromandel Peninsula using qualitative syanrad histological analysis and quantitative measures of oocytes. Histological abalysis indictaed that Z. acinaces is dioecious between the sexes. Gametogenesis began in June with gametes maturing quickly and by August/September (late winter/early spring) most razor clams were ripe. Spawining began as early as September (spring) although spawning mainly occurred during October. By December (summer) nearly all clams were completely spent. From January 2001 most clams could not be sexed as all residual gametes qwew reabsorbed. Rqazor clams remained in this stage during March 2001. Spawning began when the water temperature was around its lowest c. 15degrees celcius. Monthly mean number of eggs/follicle was sensitive to changes in reproductive development, closely following patterns observed in the qualitative stagings. Patterns of monthly mean oocyte diameters did not adequately describe the spawning events observed in qualitative analyses. Sex ratios were equal over the size range (69-99 mm shell length) of clams that could be sexed. The data presented in this study provides valuable information on the timing of spawning events for Z. acinaces, necessary for developing sustainable management strategies and selecting broodstock for aqauculture. en_US
dc.publisher RSNZ Publishing en_US
dc.relation.isbasedon en_US
dc.title Gametogenic development and spawning of the razor clam, Zenatia acinaces in northeastern New Zealand en_US
dc.parent New Zealand Journal of Marine and Freshwater Research en_US
dc.journal.volume 39 en_US
dc.journal.number 6 en_US
dc.publocation Wellington, New Zealand en_US
dc.identifier.startpage 1287 en_US
dc.identifier.endpage 1296 en_US DVCRch.Institute for Water & Environmental Resource Mgmnt en_US
dc.conference Verified OK en_US
dc.for 040600 en_US
dc.personcode 101424 en_US
dc.percentage 100 en_US Physical Geography and Environmental Geoscience en_US
dc.classification.type FOR-08 en_US
dc.description.keywords gametigenic development, razor clam, reproduction, spawining, Zenatia acinaces. en_US
dc.staffid 101424 en_US

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