Results 91 to 100 of about 168 (131)
Some of the next articles are maybe not open access.
Formation and Nature of the Opercular Chaetae of Sabellaria alveolata
Journal of Cell Science, 1945ABSTRACT The structure of the operculum of Sabellaria alveolata L. is described. There are three fans of chaetae set in each opercular lobe. The chaetae are formed in two longitudinal sacs on each side ; the outer one supplying the outer fan, and the inner the two remaining fans.
openaire +1 more source
Marine Environmental Research, 2019
Sabellaria alveolata is an ecosystem engineer species capable of building bioconstructions, playing a key functional role in the shallow coastal ecosystems. S. alveolata reefs perform several ecosystem services, such as hosting a rich fauna and producing structures able to provide coastal protection.
Bonifazi A. +5 more
openaire +3 more sources
Sabellaria alveolata is an ecosystem engineer species capable of building bioconstructions, playing a key functional role in the shallow coastal ecosystems. S. alveolata reefs perform several ecosystem services, such as hosting a rich fauna and producing structures able to provide coastal protection.
Bonifazi A. +5 more
openaire +3 more sources
Associated fauna of Sabellaria alveolata colonies on the central coast of Portugal
Journal of the Marine Biological Association of the United Kingdom, 2001This study deals with the associated fauna of Sabellaria alveolata (Annelida: Polychaeta) colonies on the central coast of Portugal. Samples were collected on two shores, Magoito and Avencas and a total of 137 taxa were found on both shores. In qualitative terms, χ2-test shows significant differences between shores.
Abel Sousa Dias, José Paula
openaire +1 more source
Ultrastructural study of oocyte maturation in the polychaete annelidSabellaria alveolata
International Journal of Invertebrate Reproduction and Development, 1984Summary Maturation begins by a cortical reaction, which resembles that of the sea urchin egg, but can precede fertilization. Complete vitelline membrane elevation necessitates the dissolution of the cortical granule matrix (which can be prevented by concanavalin A) and the retraction of the microvilli at the egg surface (which is inhibited by acid pH).
openaire +1 more source
Developmental Biology, 1984
Incorporation of [32P]phosphate into proteins was monitored, in preloaded Sabellaria oocytes, during meiosis. After a fourfold increase during the transition from prophase to metaphase I, the incorporated radioactivity decreased steadily by 25% during completion of meiosis, while it slowly increased in metaphase I-blocked oocytes.
G, Peaucellier, M, Dorée, A, Picard
openaire +2 more sources
Incorporation of [32P]phosphate into proteins was monitored, in preloaded Sabellaria oocytes, during meiosis. After a fourfold increase during the transition from prophase to metaphase I, the incorporated radioactivity decreased steadily by 25% during completion of meiosis, while it slowly increased in metaphase I-blocked oocytes.
G, Peaucellier, M, Dorée, A, Picard
openaire +2 more sources
Journal of Experimental Marine Biology and Ecology, 2016
Abstract Human trampling is one of the main anthropogenic threats to coastal communities, especially in rocky intertidal habitats. The adverse effects of human trampling have recently received increasing attention from conservation biologists, especially when concerning species playing key functional roles.
Adriana Plicanti +3 more
openaire +1 more source
Abstract Human trampling is one of the main anthropogenic threats to coastal communities, especially in rocky intertidal habitats. The adverse effects of human trampling have recently received increasing attention from conservation biologists, especially when concerning species playing key functional roles.
Adriana Plicanti +3 more
openaire +1 more source
Marine Biology, 1977
The digestive tract of Sabellaria alveolata (L.) is partitioned into 4 main regions: oesophagus, gizzard, intestine and rectum. Histoenzymologic study of the repartition of the protease activities along the digestive tract has shown that the proteases are secreted in the anterior intestine, where numerous serous gland cells are present.
openaire +1 more source
The digestive tract of Sabellaria alveolata (L.) is partitioned into 4 main regions: oesophagus, gizzard, intestine and rectum. Histoenzymologic study of the repartition of the protease activities along the digestive tract has shown that the proteases are secreted in the anterior intestine, where numerous serous gland cells are present.
openaire +1 more source
Experimental Cell Research, 1977
Abstract Contrary to most previous reports, oocytes of Sabellaria alveolata do not spontaneously undergo maturation (transition from prophase I to metaphase I) once shed. Apparent “spontaneous” maturations result from contamination of sea water by digestive proteases.
openaire +2 more sources
Abstract Contrary to most previous reports, oocytes of Sabellaria alveolata do not spontaneously undergo maturation (transition from prophase I to metaphase I) once shed. Apparent “spontaneous” maturations result from contamination of sea water by digestive proteases.
openaire +2 more sources
Sabellaria alveolata (Annelida: Sabellariidae) reefs in the Mediterranean Sea (Southern Sicily)
2015Sabellaria alveolata (Linnaeus, 1767), commonly named “sandcastle worm” or “honeycomb worm”, is a gregarious tube-dwelling polychaete building tubes by assembling sand grains and shell fragments with a proteinaceous adesive. The tubes are closely aggregated to form large reefs. These bio-constructions, providing shelter and food to several reefdwelling
Schimmenti E +4 more
openaire +1 more source
Experimental Cell Research, 1971
Abstract Appropriate concentrations of actinomycin or puromycin, applied to Sabellaria embryos, lead to swimming larvae devoid of apical tuft and post-trochal bristles, but do not prevent the regeneration of cilia in previously deciliated trochophores. These data seem to suggest a two-step translational process.
openaire +2 more sources
Abstract Appropriate concentrations of actinomycin or puromycin, applied to Sabellaria embryos, lead to swimming larvae devoid of apical tuft and post-trochal bristles, but do not prevent the regeneration of cilia in previously deciliated trochophores. These data seem to suggest a two-step translational process.
openaire +2 more sources