Reproductive biology of Palythoa caribaeorum and Protopalythoa variabilis (Cnidaria, Anthozoa, Zoanthidea) from the southeastern coast of Brazil
Reproductive biology of Palythoa caribaeorum and Protopalythoa variabilis (Cnidaria, Anthozoa, Zoanthidea) from the southeastern coast of Brazil
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DOI：
10.1590/s1519-69842005000100006
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发表时间：
2005-02-01
影响因子：
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通讯作者：
Silveira, F. L.
中科院分区：
文献类型：
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作者：
Boscolo, H. K.;Silveira, F. L.
1996年6月至1997年6月，对圣塞巴斯蒂亚海峡标记的Palythoa caribaeorum （Duchassaing & Michelotti 1860）和Protopalythoa variabilis （Duerden 1898）进行了生殖生物学研究；巴西圣保罗（西经45度26分，西经23度50分）。其配子体发育与其他虫纲动物相似。研究了两种南瓜制剂对卵母细胞直径和卵泡成熟阶段的影响。两种植物均表现出序贯性的原生雌雄同体现象，可育息肉的发生频率高（变型瓢虫83%，加勒比瓢虫72%），处于雌性状态的菌落频率高（变型瓢虫65.3%，加勒比瓢虫41.7%），配子发生明显连续。在分析的时间中，有一半的时间卵子是连续释放的，精子是连续释放的。1997年4 - 5月和2 - 3月，变异单胞虫分别释放卵子和精子。
The reproductive biology of Palythoa caribaeorum (Duchassaing & Michelotti 1860) and Protopalythoa variabilis (Duerden 1898) was studied through monthly samples from tagged colonies from June 1996 to June 1997, in Sao Sebastiao channel; Sao Paulo, Brazil (45 degrees 26'W, 23 degrees 50'S). The gametogenesis was similar to that of other zoanthids as shown by histological preparations. Oocyte diameters and maturation stages of testis vesicles were evaluated on squash preparations. Both species showed sequential protogynic hermaphroditism, with high frequency of fertile polyps (83% in P. variabilis and 72% in P. caribaeorum), high frequency of colonies in female sex condition (65.3% of P. variabilis and 41.7% of P. caribaeorum), and apparently continuous gametogenesis. In P. caribaeorum egg release was continuous and sperm release took place during half of the analyzed period. In P. variabilis, egg and sperm release occurred in April-May and February-March 1997, respectively.