1,721,145 research outputs found
A new Mediterranean species of Tethya (Porifera: Tethyida: Demospongiae)
No full textA new species of Tethya, T. meloni, is described from the Mediterranean Sea. The sponge, spherical in shape, displays a large size, up to about 8Â cm in diameter. The surface is pale yellow, covered by flattened tubercles. It differs from the known Mediterranean Tethya species (T. citrina and T. aurantium) according to the following traits: larger body size; colour; shape and size of megasters; distribution pattern of micrasters
Tipologie di impianto modulare per la spongicoltura subacquea anche in policoltura U.S.A.M.A. (Underwater Sponge Aquacolture Modular System).
No full textPrimo brevetto italiano per l'allevamento delle spugn
Ecological differences in the distribution of two Tethya (Porifera, Demospongiae) species coexisting in a mediterranean coastal lagoon.
No full textThe budding process in Tethya citrina Sarà & Melone (Porifera, Demospongiae) and the incidence of post-buds in sponge population maintenance
No full textCiclo vitale di tre popolazioni di Ephydatia fluviatilis (Porifera, Demospongiae) in differenti condizioni ambientali.
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Epibiontic and endobiontic polychaetes of Geodia cydonium (Porifera, Demospongiae) from the Mediterranean Sea
Full text linkPolychaete assemblages associated to the sponge Geodia cydonium were investigated at two sampling sites in the Mediterranean Sea: Porto Cesareo Basin (Apulia) and Marsala Lagoon (Sicily), both characterized by sheltered hydrodynamic conditions. Samples were seasonally performed during 1997, in order to compare the assemblages coming from the two localities studied, considering separately the internal and external tissues of the sponge, and with the aim of evaluating the influence of sponge size on polychaete colonization. The examined sponge is characterized by a peculiar stratification of its tissues: an external thick and hard layer, the cortex, and an internal softer one, the choanosome. Statistical analysis showed that this was the main factor controlling polychaete assemblage, with the internal tissue, less rich and diversified, appearing impoverished with respect to the external layer. A similarity in species composition was observed between sites, even though some differences were evidenced in the abundance of some species, mainly reflecting differences in local environmental conditions. Species richness and density increased with the increasing sponge size. Such a situation is particularly evident at Porto Cesareo, where sponges are covered by an algal layer which is particularly rich on the largest specimens, thus suggesting that most of the species of polychaetes were linked more to the neighbouring environment than to the sponge itself
Didiscus spinoxeatus a new species of Porifera (Demospongiae) from the Mediterranean Sea.
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