Effects of <i>Olisthodiscus luteus</i> on the feeding and reproduction of the marine rotifer <i>Synchaeta cecilia</i>

Egloff, David A.

doi:10.1093/plankt/8.2.263

Cited by 32 publications

(18 citation statements)

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“…1), which did not eat the raphidophyte. These observations also do not support the hypothesis that H. akashiwo mucus prevents feeding by entangling cilia, as seen for the rotifer Synchaeta cecilia (Egloff 1986, H. akashiwo then considered Olisthodiscus luteus). Rather, it seems highly probable that ingestion of H. akashiwo by protists is required for toxicity.…”

Section: Discussionmentioning

confidence: 63%

Effects of Heterosigma akashiwo (Raphidophyceae) on protist grazers: laboratory experiments with ciliates and heterotrophic dinoflagellates

Clough¹,

Strom²

2005

Aquat. Microb. Ecol.

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Section: Discussionmentioning

confidence: 63%

Effects of Heterosigma akashiwo (Raphidophyceae) on protist grazers: laboratory experiments with ciliates and heterotrophic dinoflagellates

Clough¹,

Strom²

2005

Aquat. Microb. Ecol.

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“…Relationships between Heterosigma akashjwo abundance and the species divers~ty of tintinnid ciliates from proliferating. Tintinnid population collapses are interpreted to be caused by the harmful effects of intracellular elements (Verity & Stoecker 1982) or mucus (Egloff 1986) of H. akashiwo, which probably inhibit the consumption of H. akashiwo (Taniguchi & Takeda 1988).…”

Section: Discussionmentioning

confidence: 99%

“…The calanoid copepod Acartia omorii has been found to almost completely reject H. akashiwo due to the intracellular chemical compounds in this alga (Uye & Takamatsu 1990). Inhibition of the feeding activity and reproduction of the rotifer Synchaeta cecila caused by H. akashiwo has also been reported when more than 1000 cells ml-' of this alga are present (Egloff 1986).…”

Section: Introductionmentioning

confidence: 99%

Changes in microbial loop components: effects of a harmful algal bloom formation and its decay

Kamiyama

Itakura²,

Nagasaki³

2000

Aquat. Microb. Ecol.

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Temporal changes in microbial loop components during the formation and decay of a bloom caused by the harmful microalga Heterosigma akashiwo (Raphidophyceae) were investigated in 1995 at a site in northern Hiroshima Bay, the Seto Inland Sea of Japan. A surface bloom of H. akashiwo, the density of w h~c h exceeded 104 cells ml-', was recorded in early summer at surface temperatures ranging from 21.6 to 23.2"C. Although the abundance and species diversity of tintinnid ciliates decreased in the surface layer when the density of H. akashiwo exceeded 104 cells rnl-', aloricate ciliates increased evidently at the end of the bloom. In addition, the mean ciliate biomass in the surface and near bottom layers reached the same level as the bacterial biomass. Two peaks in bacterial abundance and biomass were recorded during the formation and at the end of the bloom, and fluctuations in the abundance of heterotrophic nanoflagellates (HNF) clearly corresponded with fluctuations in bacterial abundance, with a lag period of 1 to 3 d. The increase of each microbial loop component during the course of the H. akashiwo bloom suggests that the dissolved organic matter produced from H. akashiwo cells temporarily enhanced the energy flow from bacteria through HNF to bacterivorous aloricate ciliates.

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“…Growth inhibition of the tintinnid species Favella ehrenbergii by Alexandnum tamarense (Hansen 1989) and Gyrod~nium aureolum (Hansen 1995) has been recognized in culture experiments. Negative responses to harmful flagellates by tintinnids or rotifers are probably caused by cell surface chemical compounds (Verity & Stoecker 1982, Egloff 1986 or toxic substances exuded from the algae (Hansen 1989(Hansen , 1995.…”

Section: Introductionmentioning

confidence: 99%

Lethal effect of the dinoflagellate Heterocapsa circularisquama upon the tintinnid ciliate Favella taraikaensis

Kamiyama¹,

Arima²

1997

Mar. Ecol. Prog. Ser.

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We examlned the effect of the toxic dinoflagellate Heterocapsa circular~squama in bloom concentrations on the mortality process of the tlntinnid clliate Favella taraikaens~s The number of viable F tara~kaensis decreased dunng the first 7 h of the incubation expenment and disappeared within 24 h at a H c~rculansquama concentration of 2 6 4 X 103 cells ml-' Mortality of the clliates occurred more rapidly with increasing concentrahons of H circularisquama Morphological changes of F taraikaensis cells, charactenzed by swollen and/or spherical forms were observed after 4 and 7 h of incubation Microscopic observations showed that H circularisquama cells frequently adhered to the adoral membranelles of F taraikaensis The mean adhesion time of H circularisquama cells to the adoral membranelles of F taraikaens~s was significantly longer than cells of the non-toxlc dinoflagellate Heterocapsa triquetra During the adhesion process contact of H circular~squama cells with the cytoplasm around the oral plug of F taraikaens~s was observed Filtrate of H circulansquarna culture solution had no effect on the activity of F tara~kaens~s cells These results suggest that H circularisquama causes physiological problems for F tara~kaensis through cell contact, with higher algal concentrations increasing the frequency of cell contact between H circularisquama and F tara~kaensis which may enhance the novlous effect of H circulansquama on F taraikaens~s

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Effects of Olisthodiscus luteus on the feeding and reproduction of the marine rotifer Synchaeta cecilia

Cited by 32 publications

References 0 publications

Effects of Heterosigma akashiwo (Raphidophyceae) on protist grazers: laboratory experiments with ciliates and heterotrophic dinoflagellates

Effects of Heterosigma akashiwo (Raphidophyceae) on protist grazers: laboratory experiments with ciliates and heterotrophic dinoflagellates

Changes in microbial loop components: effects of a harmful algal bloom formation and its decay

Lethal effect of the dinoflagellate Heterocapsa circularisquama upon the tintinnid ciliate Favella taraikaensis

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