巴西东南海岸的加勒比多管水母和瓦氏原多管水母（刺胞动物门、珊瑚纲、群体海葵目）的生殖生物学

Reproductive biology of Palythoa caribaeorum and Protopalythoa valilbilis (Cnidaria, Anthozoa, Zoanthidea) from the southeastern coast of Brazil.

作者信息

Boscolo H K, Silveira F L

机构信息

Departamento de Zoologia, Instituto, de Biociéncias, Universidade de São Paulo, Rua do Matio, travessa 14, n. 321, CEP 05508-900, Cidade Universitária, Slo Paulo, SP, Brazil.

出版信息

Braz J Biol. 2005 Feb;65(1):29-41. doi: 10.1590/s1519-69842005000100006.

DOI:10.1590/s1519-69842005000100006

PMID:16025901

Abstract

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, São 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. caribaeorun), 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. caribaribaeonrum, 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.

摘要

1996年6月至1997年6月期间，在巴西圣保罗的圣塞巴斯蒂昂海峡（西经45度26分，南纬23度50分），通过对标记群体每月采样，研究了加勒比海葵（Palythoa caribaeorum，杜沙特辛和米凯洛蒂，1860年）和变色原海葵（Protopalythoa variabilis，杜尔登，1898年）的繁殖生物学。组织学切片显示，配子发生过程与其他群体海葵相似。通过压片标本评估卵母细胞直径和精巢囊的成熟阶段。两种海葵均表现为雌性先熟的雌雄同体，可育息肉的频率较高（变色原海葵中为83%，加勒比海葵中为72%），处于雌性状态的群体频率较高（变色原海葵中为65.3%，加勒比海葵中为41.7%），并且配子发生明显持续。在加勒比海葵中，卵子释放持续进行，精子释放在分析期的一半时间内发生。在变色原海葵中，卵子和精子释放分别发生在1997年4 - 5月和2 - 3月。