Lima Eduardo J B, Gomes Paula B, Souza José R B
Departamento de Zoologia, Centro de Ciências Biológicas (CCB), Programa de Pós-Gradua..o em Ciênciasárea de Biologia Animal, Universidade Federal de Pernambuco (UFPE), Av. Professor Moraes Rego, 123550670-420 Recife, PE, Brasil.
An Acad Bras Cienc. 2009 Mar;81(1):51-9. doi: 10.1590/s0001-37652009000100007.
The edible sea urchin Echinometra lucunter (Linnaeus, 1758) is a very common species on the sublittoral-midlittoral in Brazilian rocky shores. The aim of this work was to describe the gametogenesis and reproductive strategy of the E. lucunter population at Muro Alto beach in the Northeast coast of Brazil from August 2004 to August 2005. A total of 240 specimens were collected on the sandstone reef flat from a tidepool during spring low tides. The overall sex ratio was1.12:1,withoutsignificanttemporalvariationexceptinOctober2004. Firsts sexual maturity ocurred in individuals from a diameter of 20.8 mm. There was not a significant difference in gonad index between females and males during the sampling period. The female's gonad index variation was associated with a well-defined spawning, corroborated by the histological analysis of the gonads, which demonstrates sex differences of the gamete production. By contrast, the males showed no clear pattern. It is suggested that continuous reproduction with seasonal peaks in the E. lucunter population occurs at Muro Alto beach.
可食用海胆Echinometra lucunter（林奈，1758年）是巴西岩石海岸潮下带-潮间带中非常常见的物种。这项工作的目的是描述2004年8月至2005年8月巴西东北海岸穆罗阿尔托海滩E. lucunter种群的配子发生和繁殖策略。在春季低潮时，从一个潮池的砂岩礁滩上总共采集了240个标本。总体性别比为1.12:1，除2004年10月外无明显的时间变化。首次性成熟发生在直径为20.8毫米的个体中。在采样期间，雌雄个体的性腺指数没有显著差异。雌性的性腺指数变化与明确的产卵有关，性腺的组织学分析证实了这一点，该分析表明配子产生存在性别差异。相比之下，雄性没有明显的模式。建议穆罗阿尔托海滩的E. lucunter种群进行季节性高峰的连续繁殖。
