Population succession and feeding of scyphomedusae, Aurelia aurita, in a eutrophic tropical lagoon in Taiwan

Lo, Wen-Tseng; Chen, I.L.

doi:10.1016/j.ecss.2007.07.015

Cited by 44 publications

(30 citation statements)

References 44 publications

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“…This is equivalent to a Q 10 of 2.08. Rapid digestion at warm temperatures may have been exacerbated by small prey sizes at those locations (Dawson & Martin, 2001;Ishii & Tanaka, 2001;Uye & Shimauchi, 2005;Lo & Chen, 2008). Jellyfish size also was significant (WW; t = -2.680; P = 0.014); digestion of copepods by jellyfish \ 0.3 g WW (\15 mm diameter) required very long times (5-8 h) relative to larger jellyfish.…”

Section: Digestion Timesmentioning

confidence: 88%

“…that had not been used to develop the regressions ('novel') against values calculated from the regressions equations. Results for A. aurita in Taiwan (Lo & Chen, 2008) differed depending on the net mesh ) of individual scyphomedusae (Aurelia spp.) from field gut contents vs. medusa wet weight (top), prey density (middle), and temperature (bottom).…”

Section: Modeling Of Jellyfish Population Dynamics and Ecosystem Effectsmentioning

confidence: 99%

“…Preservation time differed from 0 to 45 min, which would affect the numbers of recognizable prey. Some studies preserved whole medusae (Purcell, 2003;Uye & Shimauchi, 2005;Lo & Chen, 2008), but others rinsed out gastric pouch contents (Dawson & Martin, 2001;Lucas, unpublished), which could affect the numbers of prey retrieved. Plankton nets with different mesh-size (200 or 212 lm in Lucas, unpublished;243 lm in Purcell, 2003; 10 and 100 lm in Uye & Shimauchi, 2005; 80 lm in Dawson & Martin, 2001) or a pump and 64 lm mesh (Purcell, 1992) were used to sample available prey, which strongly affected estimates of prey density, and subsequent utility of the regressions.…”

Section: General Comments and Suggestionsmentioning

confidence: 99%

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Extension of methods for jellyfish and ctenophore trophic ecology to large-scale research

Purcell

2008

Hydrobiologia

159

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Science has rapidly expanded its frontiers with new technologies in the 20th Century. Oceanography now is studied routinely by satellite. Predictive models are on global scales. At the same time, blooms of jellyfish and ctenophores have become problematic, especially after 1980. Although we have learned a great deal about gelatinous zooplankton ecology in the 20th Century on local scales, we generally have not scaledup to estimate the extent, the causes, or effects of large blooms. In this age of global science, research on gelatinous zooplankton needs to utilize large-scale approaches and predictive equations. Some current techniques enable jellyfish populations (aerial, towed cameras), feeding (metabolic rates, stable isotopes), and dynamics (predictive modeling) to be studied over large spatial and temporal scales. I use examples of scyphomedusae (Aurelia spp., Cyanea capillata, Chrysaora quinquecirrha) and Mnemiopsis leidyi ctenophores, for which considerable data exist, to explore expanding from local to global scales of jellyfish trophic ecology. Regression analyses showed that feeding rates of Aurelia spp. (FR in copepods eaten medusa -1 d -1 ) generally could be estimated ±50% from in situ data on medusa wet weight (WW) and copepod density; temperature was not a significant factor. FR of C. capillata and C. quinquecirrha were similar to those of Aurelia spp.; the combined scyphomedusa regression underestimated measured FR of C. quinquecirrha and Aurelia spp. by 50% and 180%, respectively, and overestimated measured FR of C. capillata by 25%. Clearance rates (CR in liters cleared of copepods ctenophore -1 d -1 ) of M. leidyi were reduced in small containers (B20 l), and a ratio of container-volume to ctenophore-volume of at least 2,500:1 is recommended for feeding experiments. Clearance rates were significantly related to ctenophore WW, but not to prey density or temperature, and estimated rates within 10-159%. Respiration rates of medusae and ctenophores were similar across habitats with greatly ambient different temperatures (10-30°C), and can be predicted from regressions using only mass. These regressions may permit estimation of feeding effects of gelatinous predators without exhaustive collection of feeding data in situ. I recommend that data on feeding and metabolism of jellyfish and ctenophores be entered in a database to allow generalized predictive relationships to be developed to promote inclusion of these important predators in ecosystem studies and models.

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Section: Digestion Timesmentioning

confidence: 88%

Section: Modeling Of Jellyfish Population Dynamics and Ecosystem Effectsmentioning

confidence: 99%

Section: General Comments and Suggestionsmentioning

confidence: 99%

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Extension of methods for jellyfish and ctenophore trophic ecology to large-scale research

Purcell

2008

Hydrobiologia

159

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“…(Lo et al, 2008a), while Aurelia sp. also formed dense blooms in the Korean coastal waters and led to the shut down of the Ulchin power plant in September 1996 and August 2001 (Ki et al, 2008; Korean Nuclear Power Plant Operational Performance Information System, 2011).…”

Section: Discussionmentioning

confidence: 99%

“…Seto Inland Sea, Tokyo Bay, Korea, Taiwan) up to the northern European waters (e.g. Kertinge Nor, Gullmarfjord and Elefsis Bay) (Lucas, 2001;Uye et al, 2003;Ki et al, 2008;Lo et al, 2008a). Moon Jellyfish A. aurita blooms also occurred in the harbors and coastal waters in the Yellow Sea and Bohai Sea in China where they have been a nuisance for local tourism and coastal power plants (Su, 2007;Liu, 2008;Lu, 2009 (Lu, 2009).…”

Section: Introductionmentioning

confidence: 99%

A report on a Moon Jellyfish Aurelia aurita bloom in Sishili Bay, Northern Yellow Sea of China in 2009

Dong

Liu

Wang

et al. 2012

Aquatic Ecosystem Health &Amp; Management

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In recent years, an increasing number of reports on blooms of Moon Jellyfish (Aurelia aurita) have occurred in the northern coast of China. Throughout the summer of 2009, we studied the occurrence of an A. aurita bloom in relation to environmental variables in the Yantai Sishili Bay of the Northern Yellow Sea. The mean abundance of A. aurita was 0.62 no m−3 in summer 2009 with a highest density of 2.28 n m−3, while the mean biomass of A. aurita was 163.7 mg C m−3. Highest biomass peaked at 673.6 mg C m−3. The present study showed that the spatial distribution of A. aurita seemed unrelated to the environmental variables: sea surface temperature, salinity, dissolved oxygen and nutrients. Chlorophyll a concentration was positively correlated to the occurrence of A. aurita in summer 2009, suggesting a cascading effect resulting from the jellyfish grazing on zooplankton that in turn reduced grazing of zooplankton on phytoplankton. Increased suitable settlement and reduced currents in the Bay by intense building of coastal construction and aquaculture rafts were discussed as possibly being the main drivers for the proliferation of Moon Jellyfish A. aurita. Further investigations on A. aurita polyps in situ should be conducted to address this hypothesis and relate these to current management policies.

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Trophic ecology of a blooming jellyfish (Aurelia coerulea) in a Mediterranean coastal lagoon

Marques

Bonnet

Carré

et al. 2020

Limnology & Oceanography

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The current lack of knowledge on the trophic ecology of scyphozoans, particularly at the benthic stage, prevents a full understanding of the controls on many jellyfish blooms. The blooming scyphozoan (Aurelia coerulea) completes its entire life cycle in the Thau lagoon (southern France), where the annual population dynamics of both its benthic and pelagic stages have been described. This offered an exceptional framework to investigate the trophic processes regulating jellyfish populations over time. To this aim, stable isotopic signature analysis (δ 13 C and δ 15 N) was used to infer the diet of both A. coerulea scyphistomae and medusae over 1 year. These results were matched with medusae gut content analysis and with the monthly abundances of local plankton groups. Lastly, the isotopic signatures of A. coerulea scyphistomae and medusae were compared with those of the oysters (Crassostrea gigas) cultivated in the lagoon to evaluate the potential interspecific trophic competition. The results revealed two seasonal shifts in the trophic niche of A. coerulea and substantial overlap between the diets of its benthic and pelagic stages. Conversely, trophic niche overlaps with the oysters were restricted, suggesting a limited impact of the local jellyfish bloom on shellfish production. Phytoplankton, microzooplankton, mesozooplankton, and sedimentary organic matter were all important food sources during critical periods of A. coerulea life-cycle. However, microzooplankton abundance was found to be key for the production of buds by the scyphistomae and, therefore it is likely to control the benthic population size and, thereby, to modulate the intensity of its annual bloom in Thau.

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Population succession and feeding of scyphomedusae, Aurelia aurita, in a eutrophic tropical lagoon in Taiwan

Cited by 44 publications

References 44 publications

Extension of methods for jellyfish and ctenophore trophic ecology to large-scale research

Extension of methods for jellyfish and ctenophore trophic ecology to large-scale research

A report on a Moon Jellyfish Aurelia aurita bloom in Sishili Bay, Northern Yellow Sea of China in 2009

Trophic ecology of a blooming jellyfish (Aurelia coerulea) in a Mediterranean coastal lagoon

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