CINVESTAV IPN Mérida, Km. 6 Carretera a Progreso, Mérida, Yucatán CP 97310, Mexico.
J Invertebr Pathol. 2012 Jul;110(3):398-400. doi: 10.1016/j.jip.2012.03.017. Epub 2012 Mar 30.
An intense and generalized sporozoan infection was detected in every population of the queen conch, Strombus gigas through the Caribbean. In this contribution we establish the relationship between occurrences of an Apicomplexa: Emeriidae-like organism and reproductive activity at San Andres archipelago, Colombia. Occurrence of the parasites was estimated counting the feeding stage Merozoites and cysts Sporozoites at 40× magnification. Nonmetric multidimensional scaling analysis (NMDS) was made to correlate the parasites stages abundance with frequency of the reproductive stages. Gametogenesis and spawning were always low coinciding with high numbers of Merozoites, a positive correlation was established between parasite abundance with reabsorption and undifferentiated stages, and negative correlation was observed between parasite abundance with maturity and spawning stages. The nonmetric multidimensional scaling (NMDS) shows that gametogenesis, maturity and spawning increase as the number of parasites decrease, factor that could be threatening reproduction of S. gigas through the Caribbean.
通过加勒比地区的研究发现，女王凤凰螺（Strombus gigas）的每个种群中都存在强烈且普遍的疟原虫感染。在本研究中，我们建立了寄生虫（Apicomplexa: Emeriidae-like organism）与哥伦比亚圣安德烈斯群岛生殖活动之间的关系。通过在 40 倍放大倍率下计算食肉类（Merozoites）和成囊类（Sporozoites）寄生虫阶段的数量来估计寄生虫的发生。采用非度量多维标度分析（NMDS）将寄生虫阶段的丰度与生殖阶段的频率相关联。配子发生和产卵总是很低，与大量的 Merozoites 同时发生，在寄生虫丰度与吸收和未分化阶段之间建立了正相关关系，而在寄生虫丰度与成熟和产卵阶段之间观察到了负相关关系。非度量多维标度（NMDS）表明，随着寄生虫数量的减少，配子发生、成熟和产卵增加，这可能会通过加勒比地区威胁到 S. gigas 的繁殖。
