Reproduction cycle of sand dollar, Peronella lesueuri, in Cockburn Sound, Western Australia
Yeo, S. (2011) Reproduction cycle of sand dollar, Peronella lesueuri, in Cockburn Sound, Western Australia. In: 48th Annual Conference of the Australian Marine Science Association, 3 - 7 July, Fremantle, Western Australia.
Using histological methods, the reproductive cycle of Peronella lesueuri in Cockburn Sound, Western Australia was studied to determine the periodicity as well as the degree of gametogenic synchrony. The gametogenic cycle consists of 3 main phases: Growth - when gonads accumulate nutritive material for gametogenesis, Maturation – when gametogenesis and spawning occur, and Spent – when nutritive phagocytes reabsorb relict gametes and gonads are either devoid of gametes or only contain relict gametes and/or gametocytes. Data from the first year of a two-year study is being presented. From histological photographs, five gametogenic stages have been identified in both sexes, although stages were not distinct in all cases. Males were classed into stages qualitatively and females were staged according to the proportions of oocyte stages within the gonads. The data suggest an annual reproductive cycle with spawning taking place during late summer and autumn. The data also indicate that both sexes are in gametogenic synchrony with spent stage occurring from June to October (Winter – Spring).
|Publication Type:||Conference Item|
|Murdoch Affiliation:||School of Biological Sciences and Biotechnology|
|Item Control Page|