Search results for " polychaetes"

Sabella spallanzanii mucus bacterial agglutinating activity after arsenic exposure. The equilibrium between predation safety and immune response stab…

2022

We report the Sabella spallanzanii mucus bacterial agglutination response after inorganic arsenic (As) exposure. As is actively adsorbed from the surrounding environment and accumulated at high concentrations in tissues as an anti-predatory strategy. Here we investigated the effect of high As concentrations on its immunobiological response. It may act on mucus lectins and on its ability to agglutinate bacteria. We concluded that As at high concentrations leads to the inhibition of pathogen recognition. Nevertheless, although its biological activity is significant reduced in winter, responses to As concentrations are very similar, and below a certain threshold do not induce alterations, supp…

Study of immunotoxicity responses of Sabella spallanzanii exposed to copper sulphate

2022

Siguiendo el ejemplo fenicio: colonización del Mediterráneo occidental por Spirobranchus cf. tetraceros (Annelida: Serpulidae)

2020

A newly established population of the fouling polychaete Spirobranchus cf. tetraceros is reported from the western Mediterranean (Valencia Port). Despite previous intensive surveys, this is the first record for the taxon in the Iberian Peninsula. Molecular analyses revealed that S. cf. tetraceros from Valencia are genetically identical to specimens from Heraklion, Crete, but different from those collected in the Red Sea and S. tetraceros sensu stricto from the type locality in Australia. Mediterranean and Red Sea S. cf. tetraceros form a well-supported monophyletic clade but are clearly distinct from New South Wales specimens of S. tetraceros. Our new molecular evidence supports the hypothe…

Potential of the polychaete Sabella spallanzanii as bioindicator for PHAs

2009

Every year 230.000 t of polycyclic aromatic hydrocarbons (PHAs) enter the marine environment, resulting ubiquitously distributed world‐wide. These compounds are aromatic molecules of special concern because of their toxic and carcinogenic properties. The two main sources of PHAs in the environment are fossil fuels, mainly crude oil, and the incomplete combustion of organic materials such as wood, coal and oil. They enter the sea by both atmospheric and aquatic routes. As a consequence of their hydrophobic nature, in aquatic environments PHAs rapidly tend to associate with particulate matter and sediments represent the most important reservoir. Animal and aquatic plants can accumulate PHAs f…