Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Growth and grazing rates of the heterotrophic dinoflagellate Polykrikos kofoidii on red-tide and toxic dinoflagellates
Autore:
Jeong, HJ; Kim, SK; Kim, JS; Kim, ST; Yoo, YD; Yoon, JY;
Indirizzi:
Kunsan Natl Univ, Coll Ocean Sci & Technol, Dept Oceanog, Kunsan 573701, South Korea Kunsan Natl Univ Kunsan South Korea 573701 g, Kunsan 573701, South Korea Kunsan Natl Univ, Red Tide Res Ctr, Kunsan 573701, South Korea Kunsan NatlUniv Kunsan South Korea 573701 r, Kunsan 573701, South Korea
Titolo Testata:
JOURNAL OF EUKARYOTIC MICROBIOLOGY
fascicolo: 3, volume: 48, anno: 2001,
pagine: 298 - 308
SICI:
1066-5234(200105/06)48:3<298:GAGROT>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
SIZE;
Keywords:
feeding; food web; harmful algal bloom; protist; red tides;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Jeong, HJ Kunsan Natl Univ, Coll Ocean Sci & Technol, Dept Oceanog, Kunsan573701, South Korea Kunsan Natl Univ Kunsan South Korea 573701 573701, South Korea
Citazione:
H.J. Jeong et al., "Growth and grazing rates of the heterotrophic dinoflagellate Polykrikos kofoidii on red-tide and toxic dinoflagellates", J EUKAR MIC, 48(3), 2001, pp. 298-308

Abstract

We investigated growth rates, grazing rates, and prey selection of Polykrikos kofoidii when feeding on several species of red-tide and/or toxic dinoflagellates. Polykrikos kofoidii ingested all prey species used in this study, exhibiting positive growth on Lingulodinium polyedrum, Scrippsiella trochoidea, Ceratium furca, Gymnodinium catenatum, Gyrodinium impudicum, Prorocentrum micans, and the toxic dinoflagellate Amphidinium carterae, but not aP. minimum. Specific growth rates of P. kofoidii increased rapidly with increasing density of L. polyedrum. S. trochoidea, C. furca, and G. catenatumbefore saturating between 500-2,000 ng C ml(-1). Specific growth rates increased continuously when P. Kafoidii was fed the other prey species. Maximum specific growth rates of P. kofoidii on G catenatum (1.12 d(-1)) , S. trochoidea (0.97 d(-1)) and L. polyedrum (0.83 d(-1)) were higher than those on C. furca (0.35 d(-1)) A. carterae (0.10 d(-1)) P. micans (0.06 d(-1)) G. impudicum (0.06 d(-1)) and P. minimum (-0.03 d(-1)). Threshold prey concentrations (where net growth = 0) were 54-288 ng C ml(-1). Maximum ingestion and clearance rates of P. kofoidii on these dinoflagellates were 5-24 ng C pseudocolon(-1)d(-1) and 1.0-5.9 mul pseudocolony(-1)h(-1). respectively. Polykrikos kofoidii strongly selected L. polyedrum over S trochoidea in prey mixtures. Polykrikos kofoidii exhibited higher maximum growth, indigestion,and clearance rates than previously reported for the mixotrophic dinoflagellate Fragilidium cf. mexicanum or the heterotrophic dinoflagellates Protoperidinium cf. divergens and P. crassipes, when grown on th same prey species. Grazing coefficients calculated by combining field data on abundances ofPolykrikos spp. and co-occurring red-tide dinoflagellate prey with laboratory data on ingestion rates obtained in the present study suggest that Polykrikos spp. sometimes have a considerable grazing impact on prey populations.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 18:58:14