The potential role of podocysts in perpetuation of the common jellyfish Aurelia aurita s.l. (Cnidaria: Scyphozoa) in anthropogenically perturbed coastal waters

Thein, Htun; Ikeda, Hideki; Uye, Shin-ichi

doi:10.1007/978-94-007-5316-7_12

Cited by 14 publications

(28 citation statements)

References 38 publications

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“…This finding corroborates previous observations suggesting that podocyst production occurs as a resistance strategy to poor food conditions [25]. In (undetermined) Aurelia sp.…”

Section: Discussionsupporting

confidence: 92%

Environmental control of asexual reproduction and somatic growth of Aurelia spp. (Cnidaria, Scyphozoa) polyps from the Adriatic Sea

Hubot¹,

Lucas

Piraino

2017

PLoS ONE

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Polyps of two moon jellyfish species, Aurelia coerulea and A. relicta, from two Adriatic Sea coastal habitats were incubated under multiple combinations of temperature (14, 21°C), salinity (24, 37 ppt) and food regime (9.3, 18.6, 27.9 μg C ind−1 week−1) to comparatively assess how these factors may influence major asexual reproduction processes in the two species. Both species exhibited a shared pattern of budding mode (Directly Budded Polyps: DBP; Stolonal Budded Polyps: SBP), with DBP favoured under low food supply (9.3 μg C ind −1 week−1) and low temperature (14°C), and SBP dominant under high temperature (21°C). However, A. coerulea showed an overall higher productivity than A. relicta, in terms of budding and podocyst production rates. Further, A. coerulea exhibited a wide physiological plasticity across different temperatures and salinities as typical adaptation to ecological features of transitional coastal habitats. This may support the hypothesis that the invasion of A. coerulea across coastal habitats worldwide has been driven by shellfish aquaculture, with scyphistoma polyps and resting stages commonly found on bivalve shells. On the contrary, A. relicta appears to be strongly stenovalent, with cold, marine environmental optimal preferences (salinity 37 ppt, T ranging 14–19°C), corroborating the hypothesis of endemicity within the highly peculiar habitat of the Mljet lake. By exposing A. relicta polyps to slightly higher temperature (21°C), a previously unknown developmental mode was observed, by the sessile polyp regressing into a dispersive, temporarily unattached and tentacle-less, non-feeding stage. This may allow A. relicta polyps to escape climatic anomalies associated to warming of surface layers and deepening of isotherms, by moving into deeper, colder layers. Overall, investigations on species-specific eco-physiological and ontogenetic potentials of polyp stages may contribute to clarify the biogeographic distribution of jellyfish and the phylogenetic relationships among evolutionary related sister clades.

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“…This finding corroborates previous observations suggesting that podocyst production occurs as a resistance strategy to poor food conditions [25]. In (undetermined) Aurelia sp.…”

Section: Discussionsupporting

confidence: 92%

Environmental control of asexual reproduction and somatic growth of Aurelia spp. (Cnidaria, Scyphozoa) polyps from the Adriatic Sea

Hubot¹,

Lucas

Piraino

2017

PLoS ONE

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“…With increased temperature when spring food conditions are suitable for exponential growth (Uye & Shimauchi, 2005), while the bell diameter decreases after sexual reproduction in late summer and early autumn (Thein et al, 2012). However, population dynamics show different characteristics in different habitats (Kogovsek et al, 2012;McNamara et al, 2013).…”

Section: Discussionmentioning

confidence: 97%

Population dynamics of Aurelia sp.1 ephyrae and medusae in Jiaozhou Bay, China

Wang

Sun

2014

Hydrobiologia

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The scyphozoan Aurelia aurita (Linnaeus) s. l., is a cosmopolitan species-complex which blooms seasonally in a variety of coastal and shelf sea environments around the world. We hypothesized that ephyrae of Aurelia sp.1 are released from the inner part of the Jiaozhou Bay, China when water temperature is below 15°C in late autumn and winter. The seasonal occurrence, growth, and variation of the scyphomedusa Aurelia sp.

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“…(Coyne 1973;Willcox et al 2008). On the other hand, under poor feeding conditions not only does population growth sharply diminish (through reduction in reproduction rates; Schiariti et al 2014) but also the reproductive strategy is modified because encystment is triggered (Han and Uye 2010;Thein et al 2012). Therefore, it seems that different combinations of temperature, food supply and polyp density affect not only reproduction rates but also the reproductive strategy they adopt.…”

Section: Introductionmentioning

confidence: 94%

Density-dependent effects control the reproductive strategy and population growth of Aurelia aurita s.l. scyphistomae

et al. 2015

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The potential role of podocysts in perpetuation of the common jellyfish Aurelia aurita s.l. (Cnidaria: Scyphozoa) in anthropogenically perturbed coastal waters

Cited by 14 publications

References 38 publications

Environmental control of asexual reproduction and somatic growth of Aurelia spp. (Cnidaria, Scyphozoa) polyps from the Adriatic Sea

Environmental control of asexual reproduction and somatic growth of Aurelia spp. (Cnidaria, Scyphozoa) polyps from the Adriatic Sea

Population dynamics of Aurelia sp.1 ephyrae and medusae in Jiaozhou Bay, China

Density-dependent effects control the reproductive strategy and population growth of Aurelia aurita s.l. scyphistomae

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