196,107 research outputs found
Are sponge assemblages from semi-submerged marine caves true discrete entities?
No full textAre sponge assemblages from semi-submerged marine caves true discrete entities
Silica content and spicule size variations in Pellina semitubulosa (Lieberkuhn) (Porifera, Demospongiae)
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Il ciclo sessuale di Tedania anhelans Lieberkühn (Porifera, Demospongiae) nell’insenatura della Strea di Porto Cesareo
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Silica content and spicule size variations in Pellina semitubulosa (Porifera: Demospongiae)
No full textReproductive strategies of Mycale contarenii (Porifera: Demospongiae)
No full textThe sexual and asexual phases of the reproductive cycle of the sponge Mycale contarenii (:Martens, 1824) were studied from samples collected over a period of 2 years (June 1994 to May 1996) in a Mediterranean coastal basin (Porto Cesareo, southwestern Apulia). The species is viviparous; year round it shows a discontinuous oocyte production. No males were found, possibly owing to the very short period of spermatogenesis. M. contarenii produces asexual buds during autumn and winter, and this process seems to be related to changes in water temperature. Even though, at present, vie cannot evaluate the incidence of larval recruitment, we postulate that asexual reproduction in M. contarenii plays a crucial role in maintaining the sponge population
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