Reproductive biology of the sand dollar, Peronella lesueuri (L. Agassiz, 1841) (Echinoidea: Clypeasteroida: Laganidae), in south-western Australia
作者： Sharon Yeo , John K. Keesing , Mike van Keulen
DOI: 10.1080/07924259.2015.1047040
关键词: Ecology 、 Sand dollar 、 Marine larval ecology 、 Larva 、 Population 、 Sex ratio 、 Biology 、 Range (biology) 、 Reproductive biology 、 Gametogenesis
摘要: The reproductive biology of the sand dollar Peronella lesueuri was studied between 2009 and 2011 in Cockburn Sound, a large coastal embayment south-western Australia. Individuals P. did not display sexual size-dimorphism, population found to have sex ratio 1:1. Maturity occurred over range 80–115 mm with all dollars larger than 115 mm having distinct gonads. Monthly histological analysis gonads changes oocyte proportions time indicated that has an annual cycle; gametogenesis occurs spring spawning summer. Differences rate 2009/2010 2010/2011 may been influenced by higher temperatures experienced 2010/2011. ova (mean = 210 μm), which suggests species lecithotrophic larval development.
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