1,720,983 research outputs found
Biodiversity inventory of Mediterranean marine caves: Porifera checklist with new records from Marine Protected Areas of Sardinia and Sicily
No full textMariculture for bacterial and organic waste removal: a field study of sponge filtering activity in experimental farming
No full textCulture experiments in the field were performed on
western Mediterranean populations of Ircinia variabilis
and Agelas oroides. To evaluate culture and
filtering performances among polluted and unpolluted
sites in shallow waters, farming experiments
were carried out in a harbour, a small tourist nautical
base and a pristine biotope. Sponge explants
were cultured onto nylon ropes, and in situ clearance
rate tests were performed on farmed sponges
to assess filtering ability under diverse farming conditions.
At the harbour site, sponge survival and
growth were similar to that observed in the two
unpolluted sites until early summer, when a rapid
increase in explant mortality occurred in response
to extreme variations in environmental conditions.
Filtering experiments revealed high retention and
clearance rates of I. variabilis and A. oroides at all
sites. The highest rates were observed at the polluted
site, reflecting the optimal metabolic performance
of explants in the first phase of culture under
stressful conditions. Our results highlight the
feasibility of sponge microcosms and the ability of I.
variabilis and A. oroides to clear large volumes of
water of organic and bacterial loads in polluted sites
Retention rates on bacteria and organic matter by Ircina variabilis(Demospongiae, Dictyoceratida) in experimental sponge farming for bioremediation
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Is the geographic range of the palaeoendemic sponge Petrobiona massiliana (Porifera: Calcarea) restricted to the central-northwestern Mediterranean Sea?
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Biodiversity assessment in the Lower Mekong basin: First record of the genus Oncosclera (Porifera: Spongillina: Potamolepidae) from the Oriental Region
No full textTaxonomic richness of Thai Spongillina numbers so far seven species (five genera, one family). The first record of the genus
Oncosclera Volkmer-Ribeiro, 1970 belonging to the family Potamolepidae Brien, 1967 is here reported with the description of
a new species from the Pong River (NE Thailand, Oriental Region) in the framework of a biodiversity assessment in the Lower
Mekong Basin. An emended diagnosis of the genus is also provided. The new species, ascribed to the genus Oncosclera for
diagnostic traits of the skeleton and the gemmular architecture, differs from all the other known species of the genus in its
unique combination of diagnostic traits. O. asiatica sp. nov. is characterised by i) more or less alveolate skeleton, ii) conulose
surface with a network of branched subdermal canals, iii) acanthoxeas as dominant megascleres and less frequent
acanthostrongyles, iv) gemmular theca sublaminar of compact spongin with a scantly developed pneumatic layer of fibrous
spongin, and v) gemmuloscleres as acanthostrongyles from elongated to ovoid with tubercles/spines particularly dense towards
the tips. Despite the extremely disjunct distribution O. asiatica is morphologically similar to O. intermedia and O. jewelli from
the Neotropical Region and O. gilsoni from Pacific Islands, from which the former diverges for megascleres and/or
gemmuloscleres traits
Biomonitoring of coastal areas: cadmium effect on cytoskeleton of the calcisponge Clathrina clathrus
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