Publications by authors named "Silvana G L Siqueira"
Marine amphipods are crustaceans that lack a larval phase and consequently have low dispersion rates. Despite that, these crustaceans present a remarkable ability to be transported by rafting on natural floating substrata, especially macroalgae, where they find shelter, food and a mating ground. The species Ampithoe marcuzzii is widely distributed throughout the western Atlantic Ocean.
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- Researchers studied the brown alga Sargassum furcatum and three families of amphipods in the São Sebastião Channel, Brazil, to see if they could indicate petroleum hydrocarbon pollution.
- They found that while the natural substances of the algae and amphipods made up most of the n-alkanes present, some signs of petroleum were evident, including uncharacteristic n-alkane patterns.
- Total polycyclic aromatic hydrocarbons (PAHs) in samples ranged from 33.4 to 2010 ng/g, with low molecular weight PAHs like naphthalene predominating, suggesting the algae and amphipods are effective indicators of petroleum input, even at low concentrations.
A new species of lysianassid amphipod belonging to the genus Cheirimedon was collected on the continental slope of the Campos Basin, the largest oil reserve in Brazilian waters. This is the first record of the genus Cheirimedon from the Atlantic Ocean, which was previously restricted to the Antarctic and Tasmanian sea. The new species is fully illustrated and compared with related species.
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