Carbon metabolism and strobilation in Cassiopea andromedea (Cnidaria: Scyphozoa): Significance of endosymbiotic dinoflagellates

Hofmann, D. K.; Kremer, Bruno P.

doi:10.1007/bf00397064

Cited by 75 publications

(44 citation statements)

References 22 publications

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“…Lindahl & Hernroth 1983 and typically preceeds the population crash of aposymbiotic medusae and ctenophore populations during late summer in temperate systems. Direct transfer of algal production (photosynthates) to animal tissue has been shown for Cassiopea andromedea (Hofmann & Kremer 1981), but it is insufficient to meet the nutri.tiona1 demands of the growing scyphozoon. Both C. andromedea and P. punctata have the abllity to remain at the bottom for extended periods of time; this may be a behavorial adaptation to optimize assimilation of benthic nutrient fluxes.…”

Section: Discussionmentioning

confidence: 99%

“…(Mayer 1910). Algal endosymbionts (zooxanthellae) accelerate the excretion process of their hosts by utilization of ammonium-rich animal wastes (Younge & Nicholls 1931, Muscatine 1971, Cates & McLaughlin 1976, and contribute to the energetic requirements of the host by direct transfer of algal photosynthates (Hofmann & Kremer 1981). The ecological implications of symbiotic medusae in coastal environments are poorly understood.…”

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: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Garcia¹

1990

Mar. Ecol. Prog. Ser.

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“…suggest that the zooxanthellae remove hostproduced ammonia and aid in the recycling of nitrogen (Cates & McLaughlin 1976). Hofmann & Kremer (1981) and Hofmann et al (1996) investigated the importance of zooxanthellae to strobilation in Cassiopea andromeda and reported that the presence of algae was indispensable although algal photosynthesis or photosynthate release was not essential for this process. Apparently, the symbiotic zooxanthellae produce and supply a 'factor' which promotes the elevated metabolism required for proceeding through developmental stages (Rahat & Hofmann 1987).…”

Section: Introductionmentioning

confidence: 99%

Production, respiration, and photophysiology of the mangrove jellyfish Cassiopea xamachana symbiotic with zooxanthellae:effect of jellyfish size and season

Verde¹,

McCloskey²

1998

Mar. Ecol. Prog. Ser.

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The association between the symbiont Symbiodinium microadriaticum (zooxanthellae) and its host jellyfish, Cassiopea xamachana, was investigated as a function of jellyfish size and season. Symbiont cell diameter and volume were higher dunng January than September. Although zooxanthella-specific chlorophyll was independent of jellyfish size, both chlorophyll a and c were higher during January. Regardless of season, algal density and jellyfish size were inversely related. The die1 mitotic index (MI) of zooxanthellae was phased, with a peak of 0.25 y: occurring between 09:OO and 12:OO h. September photosynthetic rates were always higher than January rates and reflected the seasonal light and temperature regimes at the latitude of the Florida Keys (USA). Photosynthesis, when normalized to either zooxanthella density or protein, displayed an inverse relationship with jellyfish slie ? v ?~i i~l~d l i I B~~I I~L I U I I 1die3 dlbu biluwed iuve~be ~eidii~llsilip w~i i~ jeiiyiisil size, w~i i l Sepielll'uer metabolism being higher than that of January. The carbon budgets calculated for these rnedusae indicate that the carbon photosynthetically fixed by the zooxanthellae, and subsequently translocated to the host, is capable of satisfying about 169% of the host's metabolic demand (CZAR) and is independent of both jellyfish size and season. These seasonally influenced physiological effects underscore the necessity for seasonal examinations of algal-cnidarian syrnbioses in order to understand the photophysiology of the association on an annual basis

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“…Significance of endosymbiotic dinoflagellate in carbon metabolism and strobilation in C. andromeda has been studied by Hofmann and Kremer, 1981. They concluded that strobilation is just supported but not triggered by dinoflagellate or zooxanthellae photosynthetic activity.…”

Section: Discussionmentioning

confidence: 99%

Cassiopea andromeda (Forsskål, 1775) in the Gulf of Kutch, India: initial discovery of the scyphistoma, and a record of the medusa in nearly a century

2016

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Background: Cassiopea andromeda is reported here after long gap of almost a century from the Gulf of Kutch, Gujarat. This is the first record of scyphistoma form of the species from India and first record of the medusa from the Arambhada coast. Results: An upside down scyphozoan jellyfish Cassiopea andromeda belong to family Cassiopeidae. Identification and description of medusa and scyphistomae were given based on morphological characters. Conclusions: This paper discusses about the variation in colour form, aggregation of medusae and morphology of polyp.

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Carbon metabolism and strobilation in Cassiopea andromedea (Cnidaria: Scyphozoa): Significance of endosymbiotic dinoflagellates

Cited by 75 publications

References 22 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

Production, respiration, and photophysiology of the mangrove jellyfish Cassiopea xamachana symbiotic with zooxanthellae:effect of jellyfish size and season

Cassiopea andromeda (Forsskål, 1775) in the Gulf of Kutch, India: initial discovery of the scyphistoma, and a record of the medusa in nearly a century

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