Description and comparative study of physico-chemical parameters of the teleost fish skin mucus
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AuthorsGuardiola, F.A. (Francisco Antonio); Cuartero, M.; Collado-González, M.M.; Arizcun-Arizcun, M. (Marta); Díaz-Baños, F.G.; Meseguer, J. (José); Cuesta, A. (Alberto); Esteban, M.A. (María Ángeles)
Abstract. The study of mucosal surfaces, and in particular the fish skin and its secreted mucus, has been of great interest recently among immunologists. Measurement of the viscosity and other physico-chemical parameters (protein concentration, pH, conductivity, redox potential, osmolality and density) of the skin mucus can help to understand its biological functions. We have used five marine species of teleost: gilthead seabream (Sparus aurata L.), European sea bass (Dicentrarchus labrax L.), shi drum (Umbrina cirrosa L.), common dentex (Dentex dentex L.) and dusky grouper (Epinephelus marginatus L.), all of them with commercial interest in the aquaculture of the Mediterranean area. Mucus showed a direct shear- and temperaturedependent viscosity, with a non-Newtonian behavior, which differed however between two groups: one with higher viscosity (D. labrax, U. cirrosa, D. dentex) and the other with lower viscosity (S. aurata, E. marginatus). In addition, there was a clear interrelation ...
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