School of Marine and Tropical Biology, Faculty of Science and Engineering, James Cook University, Cairns, Queensland, Australia.
PLoS One. 2013 Jul 26;8(7):e69369. doi: 10.1371/journal.pone.0069369. Print 2013.
A latina nr mordens have been located in large predictable spawning aggregations near Osprey Reef in the Coral Sea eight to ten days after a full moon; however, polyps have never been located in-situ. The polyp stage contributes to the abundance of medusae through asexual reproduction and metamorphosis, and may influence the periodicity of medusae by metamorphosis of the polyp. To elucidate the relationship between medusae periodicity and polyp ecology, polyps were exposed to thermal and osmotic treatments in order to determine the theoretical environmental limits to their distribution. Maximum fecundity occurred in thermal treatments of 21 to 25ºC and the theoretical minimum thermal requirement for population stability was approximately 17ºC. Polyps were also exposed to five feeding regimes and fecundity was found to be positively correlated with feeding frequency. Thermal and osmotic variations did not induce metamorphosis in this species, however, reduced food did. The implications of asexual reproduction and cues for metamorphosis in relation to population dynamics of this species are discussed.
在满月后 8-10 天，靠近珊瑚海鲷鱼礁的大型可预测产卵聚集区发现了大量的拉丁美洲海刺；然而，从未在原位发现水螅体。水螅体阶段通过无性繁殖和变态为水母的大量繁殖做出贡献，并且可能通过水螅体的变态影响水母的周期性。为了阐明水母周期性与水螅体生态学之间的关系，将水螅体暴露于热和渗透处理中，以确定其分布的理论环境极限。在 21 至 25°C 的热处理中，最大繁殖力发生，种群稳定的理论最小热需求约为 17°C。还将水螅体暴露于五种摄食制度下，发现繁殖力与摄食频率呈正相关。热和渗透的变化没有诱导该物种发生变态，但减少食物会诱导变态。讨论了该物种的无性繁殖和变态线索与种群动态的关系。
