Sterol content in zooplankton of Adriatic Sea open waters

Serrazanetti, Gian Paolo; Purcaro, Giorgia; Pagnucco, C.; Bergami, Caterina; Milani, Liana Inês Guidolin

doi:10.1016/0305-0491(92)90073-z

Cited by 7 publications

(5 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Findings similar to this study were described by Serrazanetti et al (29) for mixed zooplankters from the Adriatic Sea. These authors observed that levels of cholesta-5,24-dien-3β-ol were higher by a factor of about three during algal blooms than later in the year.…”

Section: Discussionsupporting

confidence: 93%

Differences in the sterol composition of dominant antarctic zooplankton

Mühlebach

Albers

Kattner

1999

Lipids

View full text Add to dashboard Cite

The composition of free sterols was determined in Antarctic zooplankton species with various feeding behaviors. In the Southern Ocean, the dominant calanoid copepods Calanoides acutus, Calanus propinquus, Metridia gerlachei, and Euchaeta antarctica were investigated during different seasons and compared with the euphausiids Euphausia superba, E. crystallorophias, and Thysanoessa macrura. In addition, the Arctic copepods Calanus hyperboreus, C. glacialis, and C. finmarchicus were studied for comparison. Analyses were performed using gas chromatography and mass spectrometry. The zooplankton species exhibited a simple sterol content of up to six sterols. In the copepods, cholest-5-en-3beta-ol (22.1 to 60.5%, range of sample means), cholesta-5,24-dien-3beta-ol (22.3 to 45.2%), and cholesta-5,22E-dien-3beta-ol (4.3 to 33.4%) contributed most, while in euphausiids the sterol composition was less complex with cholest-5-en-3beta-ol always accounting for more than 75% of the total. Although sterols are membrane constituents and are expected not to vary considerably, differences in the abundance of sterols were observed between the species and the seasons. In herbivorous copepods, cholesta-5,24-dien-3beta-ol increased by a factor of 1.5 to about 45% during the main feeding period in summer; this sterol is a metabolic precursor of cholest-5-en-3beta-ol in the process of the dealkylation of dietary C-24 alkylated phytosterols. Cholest-5-en-3beta-ol decreased by the same proportion. Omnivorous and carnivorous copepods showed average levels of cholesta-5,24-dien-3beta-ol below 25%. These changes in sterol composition between copepod species seem to reflect their different feeding modes.

show abstract

Section: Discussionsupporting

confidence: 93%

Differences in the sterol composition of dominant antarctic zooplankton

Mühlebach

Albers

Kattner

1999

Lipids

View full text Add to dashboard Cite

show abstract

“…Sterol profiles are not well studied in copepods, but one major difference did occur between profiles from our study and previous work. Desmosterol (cholesta-5, 24-dien-3β-ol) was notably absent in the copepods in the present study, a compound which was often the second most abundant sterol found in zooplankton (Harvey et al 1987, Serrazanetti et al 1992, Mühlebach et al 1999. Desmosterol is usually thought to occur because it is an intermediate in the conversion of dietary phytosterols to cholesterol (Goad 1978).…”

Section: Discussionmentioning

confidence: 52%

Lipid composition of tropical and subtropical copepod species of the genus Rhincalanus (Copepoda: Eucalanidae): a novel fatty acid and alcohol signature

Cass¹,

Wakeham²,

Daly³

2011

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

“…a marker for marine plankton Hudson et al, 2001) and probably indicates extensive grazing of primary marine biomass by zooplankton or benthic fauna. Cholesterol has been reported to be the predominant sterol in zooplankton collected in Adriatic Sea (Serrazanetti et al, 1992). In the samples analyzed, cholesterol is more concentrated in the coastal areas.…”

Section: Sterolsmentioning

confidence: 88%

“…Due to their relatively good chemical stability and their taxonomically biased structures, sterols have been widely used as tracers for studying sources of organic matter in coastal areas Yunker et al, 1995;Hudson et al, 2001;Pinturier-Geiss et al, 2002). In the Adriatic Sea, the distribution of sterols has been mainly investigated in biota, including marine molluscs Viviani, 1976, 1989;Piretti et al, 1982Piretti et al, , 1987, zooplankton (Serrazanetti et al, , 1992 and microalgae (Piretti et al, 1997). The few studies published on the distribution of sterols in Adriatic Sea particulate matter and sediments dealt principally with the origin of organic matter in estuarine and coastal lagoonal areas (Laurcillard and Saliot, 1993;Benfenati et al, 1994;Fattore et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

The distribution of sterols and organic-walled dinoflagellate cysts in surface sediments of the North-western Adriatic Sea (Italy)

Sangiorgi

Fabbri

Comandini

et al. 2005

Estuarine, Coastal and Shelf Science

View full text Add to dashboard Cite

The distributions of sterols and organic-walled dinoflagellate cysts (dinocysts) in five NW Adriatic Sea surface sediment samples were investigated. Samples are representative of areas differently influenced by freshwater inputs, mainly coming from the Po River. All the investigated samples exhibit the same suite of principal sterols, with cholest-5-en-3b-ol (cholesterol), 4a,23,24-trimethyl-5a-cholest-22E-en-3b-ol (dinosterol), 24-ethylcholest-5-en-3b-ol (sitosterol) and 24-methylcholesta-5,22E-dien-3b-ol (brassicasterol or epibrassicasterol) displaying the highest concentrations and relative abundances. The distribution of sterols in the samples is not related to their distance from the coast and/or with the C/N ratios and suggests a prevalent input of marine, autochthonous organic matter in the surface sediments. In particular, the high abundance of dinosterol underlines the importance of dinoflagellate productivity in this area and its contribution to the organic matter in sediments. However, absolute and relative abundances of dinosterol do not follow the trend observed for dinocyst concentrations in the investigated samples, with the exception of Spiniferites spp. cysts and cysts produced by Gonyaulax species.

show abstract

Sterol content in zooplankton of Adriatic Sea open waters

Cited by 7 publications

References 17 publications

Differences in the sterol composition of dominant antarctic zooplankton

Differences in the sterol composition of dominant antarctic zooplankton

Lipid composition of tropical and subtropical copepod species of the genus Rhincalanus (Copepoda: Eucalanidae): a novel fatty acid and alcohol signature

The distribution of sterols and organic-walled dinoflagellate cysts in surface sediments of the North-western Adriatic Sea (Italy)

Contact Info

Product

Resources

About