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首页> 外文期刊>Journal of marine systems: journal of the European Association of Marine Sciences and Techniques >Offshore dispersion of ephyrae and medusae of Aurelia aurita s.l. (Cnidaria: Scyphozoa) from port enclosures: Physical and biological factors
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Offshore dispersion of ephyrae and medusae of Aurelia aurita s.l. (Cnidaria: Scyphozoa) from port enclosures: Physical and biological factors

机译：Aurelia aurita s.l.的浮游生物和水母的离岸分散。港口围栏（刺ni：Sphophozoa）：物理和生物学因素

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摘要

Recurrent outbreaks of the common jellyfish Aurelia aurita s.l. have been increasingly significant, particularly in human perturbed coastal waters, where numerous artificial constructions increase suitable habitat for polyp populations. We examined the spatiotemporal dispersion process in 6 ports of ephyrae of A. aurita after release from strobilating polyps, to offshore waters of northern Harima Nada (eutrophic eastern Inland Sea of Japan) from January to May 2010. Almost exclusive occurrence of the ephyra stage in the ports demonstrated that their seeding polyps reside in the port enclosures, and liberated ephyrae are rapidly exported offshore by tidal water exchange. Post-ephyra stages occurred primarily outside the ports, and their age increased gradually offshore, ca. up to 9 km off the ports, and the pattern of age increase could be simulated by a simple diffusion model. However, there was an abrupt decline in A. aurita density beyond ca, 3 km off the shore, where jellyfish-eating Chrysaora pacifica medusae were prevalent. We conclude that physical forces are primarily responsible for offshore dispersion of A. aurita, and a biological factor, i.e. predation by C. pacifica, jointly affects the distribution pattern of A. aurita. (C) 2015 Elsevier B.V. All rights reserved.
机译：常见水母Aurelia aurita s.l.的反复发作。尤其在人为扰动的沿海水域，这种现象已变得越来越重要，那里大量的人工建筑为息肉种群增加了合适的栖息地。我们研究了2010年1月至2010年5月，金黄色葡萄球菌的6个港口的藻类从气息性息肉释放到北播磨田（日本富营养化的东内陆海域）的近海水域的时空分散过程。这些港口表明，它们的播种息肉位于港口围场中，并且通过潮汐水交换将游离的紫phy迅速出口到近海。珍珠母后阶段主要发生在港口外，它们的年龄逐渐增加到近海。距港口9公里以内，可以通过简单的扩散模型模拟年龄增长的模式。然而，在距海岸约3 km的ca以外，a。aurita的密度突然下降，在这里吃水母的Chrysaora pacifica medusae盛行。我们得出的结论是，物理力是造成金黄色球菌离岸扩散的主要因素，而生物学因素（即太平洋锦梭鱼的捕食）共同影响金黄色球菌的分布格局。 （C）2015 Elsevier B.V.保留所有权利。

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