Population dynamics of Aurelia aurita medusae in Kiel Bight, Germany (FRG)

Möller, H.

doi:10.1007/bf00389155

Cited by 170 publications

(97 citation statements)

References 6 publications

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“…This is similar to observations reported elsewhere for the related Aurelia aurita (Hamner & Jenssen 1974, Moller 1980, Van der Veer & Oorthuysen 1985, Papathanassiou et al 1987, Grondahl 1988. However, in contrast to these observations where A. aunta is present for only part of the year, P. punctata appears to grow inside the lagoon throughout the year.…”

Section: Discussionsupporting

confidence: 91%

“…Several studies have characterized the population dynamics and production of aposymbiotic scyphomedusae, such as Aurelia aunta (Yasuda 1971, Hamner & Jenssen 1974, Moller 1980, Van Der Veer & Oorthuysen 1985, Papathanassiou e t al. 1987, Grondahl 1988.…”

Section: Introductionmentioning

confidence: 99%

“…Predation by scyphomedusae can regulate system function by releasing herbivore grazing pressure, thereby inducing phytoplankton blooms (Huntley & Hobson 1978, Lindahl & Hernroth 1983. In highly productive systems, such as Elefsis Bay, Greece (Papathanassiou et al 1987) and Kiel Bight, Germany (Moller 1980) the population biomass of A. aurita has been shown to increase exponentially for at least 2 mo. Starvation, parasitism, predation and genetic determination have been proposed as potential causes for the typical population decline of A. aurita at the end of summer (Hamner & Jenssen 197 4, Moller 1980b).…”

Section: Introductionmentioning

confidence: 99%

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Population dynamics and production of Phyllorhiza punctata (Cnidaria: Scyphozoa) in Laguna Joyuda, Puerto Rico

Garcia¹

1990

Mar. Ecol. Prog. Ser.

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Medusae of Phyllorhiza punctata were sampled in Laguna Joyuda from October 1985 through October 1986. Maximum numerical abundance (143 ind. per 103 m3) and population biomass (530.6 mg ash-free dry wt [AFDW] m-3) were observed during summer Net increments In population biomass were associated with growth of individuals from October to December and with individual growth and subsequent recruitment of small medusae from May to August. More than 75 '', of the total recruitment into the smallest size classes (< 3 cm) occurred in June, indicative of one large cohort from which most of the summer population developed. High mortality was observed after December 1985, and between August and October 1986. Recruitment of the smaller medusae by early summer and mortality of large adults (> 30 cm) during late summer in the following year suggests that P. punctata follows an annual cycle in Laguna Joyuda. Growth rates, calculated from increases In mean individual weight of held-collected specimens, were exponential during autumn (mean g,. = 0.077 d -l ) , and fl-om June through August (summer; mean gw = 0.079 d-l). Individual growth rates declined with increasing size durlng both these growth stanzas, but faster growth rates were observed In autumn for medusae of equivalent or larger size. Total population biomass increased exponentially at rates of ca 0 063 and 0.028 d-l during October to December 1985 and May to August 1986 respectively. The slower growth rates in summer coincided with a marked reduction in abundance of non-gelatinous zooplankton, suggesting that medusae could have been food limited at this time. Nevertheless, estimated population production rates were much higher during summer (maximum 14.3 mg AFDW m-3 d.') due to the higher population biomass compared to autumn (maximum 1.6 mg AFDW m-%-').

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Population dynamics and production of Phyllorhiza punctata (Cnidaria: Scyphozoa) in Laguna Joyuda, Puerto Rico

Garcia¹

1990

Mar. Ecol. Prog. Ser.

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“…Möller 1980), and is a dominant predator in Tokyo Bay (Ishii & Tanaka 2001). Tokyo Bay is one of the most eutrophicated bays in Japan, and mass occurrences of A. aurita have often been observed with the progress of eutrophication (Omori et al 1995, Ishii 2001.…”

Section: Introductionmentioning

confidence: 99%

Effects of low dissolved oxygen on planula settlement, polyp growth and asexual reproduction of Aurelia aurita

Ishii

Ohba

Kobayashi

2008

Plankton Benthos Res

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Tokyo Bay is one of the most eutrophicated bays in Japan, and mass occurrences of scyphozoan jellyfish Aurelia aurita have often been observed with progress of eutrophication. In the coastal environment, the abundance of substrates suitable for A. aurita polyps are obviously increasing by reclamation. However, most suitable substrates for settling, except in the bottom-layer in the innermost part of Tokyo Bay, are occupied by other sessile organisms such as mussels, barnacles or ascidians. The bottom layer is characterized by low DO concentrations (Ϲ2.0 ml O 2 L Ϫ1) that turn to hypoxia during summer, resulting in low recruitment and low growth of other sessile organisms. To elucidate the mechanism by which mass occurrence of jellyfish occurs, adaptative behavior to hypoxia in planula larvae and the polyp stage was experimentally studied. In the present study, planula settlement was promoted by a decrease in DO concentrations, and apparent growth of polyps and production of daughter polyps by asexual budding were also observed, even in the polyps cultured in hypoxic waters. Moreover A. aurita polyps cultured under hypoxic conditions began strobilation and ephyrae were liberated after the DO concentration levels were restored. It is suggested that the occurrence of hypoxic waters is rather favorable for the survival, growth and asexual reproduction of A. aurita polyps, and it can directly contribute to the consequent production of A. aurita ephyrae in the next spring within Tokyo Bay.

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“…Among these coelenterates several species (e.g. the ctenophore Pleurobrachia pileus, the scyphomedusa Aurelia aurita and the hydromedusae Sarsia tubulosa and Eutonina indicans) are known as potential predators of fish larvae, under laboratory (Fraser 1969, Greve 1972, Arai & Hay 1982, Bailey & Batty 1983, Bailey 1984 or natural conditions (Moller 1980b, Arai & Hay 1982.…”

Section: Introductionmentioning

confidence: 99%

Impact of coelenterate predation on larval plaice Pleuronectes platessa and flounder Platichthys flesus stock in the western Wadden Sea

Veer¹

1985

Mar. Ecol. Prog. Ser.

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During the seasonal immigration of plaice and flounder larvae into the Dutch Wadden Sea in spring, the coelenterates Pleurobrachia pileus L. and Aurelia aurita L. have been positively identified as predators of both flatfish species. Evidence for a causal relation between outbursts of the predatory coelenterates and the observed abrupt termination of larval flatfish immigration is found in (1) the coincidence of increases in coelenterate numbers and decreases in larval densities, (2) positive observations of larval flatfish in coelenterate stomach contents, (3) a comparison between food demand of the coelenterate population and standing stock of the pelagic food resource at that time. Impact of this predation on plaice recruitment is expected to be small, since most larvae have already completed their immigration into the Wadden Sea when the coelenterate outburst starts. Although the coelenterate outburst occurs at about the same time every year, their predation may have a density-dependent component, since the timing of plaice immigration seems to be related to abundance, with larger yearclasses arriving later than smaller ones. For flounder larvae the impact will be greater, because of the shorter period of immigration and the coincidence between coelenterate outburst and maximum flounder abundance.

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Population dynamics of Aurelia aurita medusae in Kiel Bight, Germany (FRG)

Cited by 170 publications

References 6 publications

Population dynamics and production of Phyllorhiza punctata (Cnidaria: Scyphozoa) in Laguna Joyuda, Puerto Rico

Population dynamics and production of Phyllorhiza punctata (Cnidaria: Scyphozoa) in Laguna Joyuda, Puerto Rico

Effects of low dissolved oxygen on planula settlement, polyp growth and asexual reproduction of Aurelia aurita

Impact of coelenterate predation on larval plaice Pleuronectes platessa and flounder Platichthys flesus stock in the western Wadden Sea

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