Chlorinated hydrocarbons in the seawater and surface sediments of Blanca Bay, Argentina

Sericano, JoséLuis; Pucci, Adan E.

doi:10.1016/0272-7714(84)90051-9

Cited by 19 publications

(8 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The information given by Sericano & Pucci (1984) on the water column of Blanca Bay, Argentina, reveals no significant differences (paired t-test) between ,,.-DDT, p,p.-DDT, aldrin, heptachlor, a-HCH, y-HCH and 6-HCH concentrations between l m depth and bottom waters (7 to 12 m). The studies of Stadler (1977) show significantly higher concentrations of ,,,-DDD, a-HCH (S) Concentrahon factor Source PCB's 104-10' Duce et al (19721, Bidleman & Olney (1974), Stadler (1977), Ofstad et al (1979), Caul & Ziebarth (1980 .,.-DDT 10J-106 Bidleman & Olney (19741, Stadler (1977), Sericano & Pucci (1984) .,.-DDT 1 o4…”

Section: Depth Distributionmentioning

confidence: 99%

“…Aldrin has been reported from Biscayne Bay, Florida, 17.8 i 9.4 ng I-', in 1968 (Seba & Corcoran 1969) and Blanca Bay, Argentina in 1980-81, 3.7 + 4.1 ng 1-' (Sericano & Pucci 1984). Heptachlor has been reported only from Blanca Bay, Argentina, in 198C81 at 40.8 f 46.4 and chlordane only from Corpus Christi Bay, Texas, in 1980 at 0.18 f 0.31 ng 1-' (Ray et al 1983a).…”

Section: Coastal and Near-shore Surface Watersmentioning

confidence: 99%

“…In the DDT family, ,,.-DDT, ,,.-DDE and ,,,-DDD are the most frequently reported forms in coastal surface waters with concentrations generally below 5 ng 1-' (pptr) ( Table 2). Exceptions are the coastal waters off Marseille, France, in 1971 (Raybaud 1972) and Blanca Bay, Argentina, in 1980-81 (Sericano & Pucci 1984) where levels averaged more than 40 ng 1-l. The lowest values, 0.008 ng 1-l, were reported off Syowa Station.…”

Section: Coastal and Near-shore Surface Watersmentioning

confidence: 99%

“…Bidleman & Olney (1974), Sericano & Pucci (1984) .,. (1984) and y-HCH but not .,.-DDT, ,,.-DDE, dieldrin and PCBs in the upper metre compared to bottom waters (10 to 44 m) of the German Bight, whereas in the western Baltic Sea only surface and bottom PCB concentrations were similar.…”

Section: Depth Distributionmentioning

confidence: 99%

“…Organochlorine determinations on seawater have been made either by direct solvent extraction of bulk seawater, occasionally prefiltered through coarse mesh to remove larger organisms, or by concentration of the samples on resins such as Amberlite XAD-2, polyurethane foam, activated carbon or other absorbant (Sericano & Pucci 1984). The direct extraction approach combines organochlonnes in 'solution' with those bound to both microorganisms and inert particles, whereas the sorbent methods allow a proportion of the organochlorines associated with particulates to escape detection (Bedford 1974).…”

Section: Availability To Zooplankton From Seawatermentioning

confidence: 99%

See 4 more Smart Citations

Organochlorine dynamics between zooplankton and their environment, a reassessment

Harding¹

1986

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

The level of organochlorine contamination in estuarine, coastal or oceanic waters and various depth strata, including surface films, is important in predicting bioaccumulation in zooplankton. Present and past levels of contamination in seawater are briefly reviewed and summarized. Most of the evidence indcates that little organochlorine is truly dissolved in seawater: most molecules are sorbed onto particulate material or sequestered into rnicellar structures. A first-order l n e t i c model is adequate to describe the accumulation of organochlorines by zooplankton from seawater because current laboratory techniques are not refined enough to disbnguish pathways within the organism. The chemical nature of the compounds, such as chlorine content, influences the time taken to reach an equilibrium level in an organism and the bioaccumulation at equilibrium. Size of organism, and temperature and salinity of the environment affect organochlorine uptake rates; this is believed to be related to the weight-specific surface area of the zooplankter exposed per unit time. The lipid content influences the carrying capacity of the zooplankter or its bloconcentration factor from seawater The same kinetic model can be expanded to include organochlorines asslmllated through feeding on contaminated food. Experimental studies have shown that 'field' levels of contamination in zooplankton can be reached in the lab within days by accumulation from food. The transfer of organochlorines from generation to generation in the lipid-nch eggs of zooplankters is discussed and explored with the l n e t i c model. Juvenile stages are prehcted to contain the highest organochlorine levels after yolk absorption and therefore should expenence the greatest n~ortality. Finally, it is concluded, from consideration of present levels of contamination, that the water column is the present and probably ultimate repository of most organochlorine compounds in the marine environment and that zooplankton play a major role in distributing organochlorines from atmospheric 'fallout' throughout the ocean depths.

show abstract