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Registros recuperados: 15
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Age et croissance de l'oursin Paracentrotus lividus Lamarck, 1816 (Echinodermata-Echinoidea) dans le golfe de Tunis (Méditerranée) ArchiMer
Sellem, Fériel; Langar, Habib; Pesando, Danielle.
The age of Paracentrotus lividus in the gulf of Tunis was evaluated by analysing the natural growth banding in the interambulacral plates from the oral part of the test. It appeared that growth rates increased in spring and summer, and decreased in autumn and winter. The maximum age and diameter were estimated to be 8 years and 53 mm respectively, Compared to populations of Paracentrotus lividus from NW Mediterranean and Atlantic, that of the gulf of Tunis presented a more rapid growth.
Tipo: Text Palavras-chave: Méditerranée; Oursin comestible; Âge et croissance; Mediterranean sea; Sea urchin; Age and growth.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00323/43384/42830.pdf
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Analyse des ressources et des caractéristiques individuelles du stock d'oursin Paracentrotus lividus (Lamarck, 1816) du territoire 64 ArchiMer
De Casamajor, Marie-noelle; Mahias, Jeremy; Bru, Noelle; Caill-milly, Nathalie.
A spatial sampling was carried out for stock assessment of sea urchin P. lividus throughout the Basque coast. A sampling, over the year, was conducted to study the reproductive cycle. This work took place over 2013 and 2014. Reproduction occurs once in spring, between May and August 2014. Among factors affecting the release of eggs, salinity, temperature and hydrodynamics show a significant inter-annual variability in the Basque coast. Thus, the period set in 2014, may fluctuate between years. For the stock, the results showed that 11.85 (+/-0.32) million individuals of harvestable biomass for 724 tones (+/- 137). Stock is spread over the entire surveyed area density and biomass decrease rapidly with depth, individuals are mainly located between 0 and 5 m....
Tipo: Text Palavras-chave: Oursin commun; Stock; Biomasse; Reproduction; Côte basque; Conditions environnementales; Sea urchin; Stock; Biomass; Reproduction; Basque coast; Environmental conditions.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00218/32889/31373.pdf
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Biologia reprodutiva de Echinometra lucunter (Echinodermata: Echinoidea) na Praia da Costa, Vila Velha, Espírito Santo Rev. Bras. Zool.
Mariante,Fátima L. F.; Lemos,Gabriela B.; Eutrópio,Frederico J.; Gomes,Levy C..
Echinometra lucunter Linnaeus, 1758 is a tropical sea urchin with strong bioerosive potential. Consequently, this species has great ecological importance. The species occurs in high densities along the Brazilian coast, particularly in the south and southeast. The objective of this work was to evaluate both the effects of annual seasonality and the lunar cycle on the reproduction of E. lucunter. Individuals were sampled monthly for a period of one year and during four complete lunar cycles. The gonadosomatic index (GI) was calculated to determine the annual and monthly reproductive peaks based on the lunar phase. The sex ratio (male:female) was 1:1.04, without significant difference in sexual proportion. The GI was significantly higher for males than for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gonadosomatic Index; Lunar periodicity; Sazonality; Sea urchin.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000400008
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Cloning and expression analysis of allograft inflammatory factor type 1 in coelomocytes of antarctic sea urchin (Sterechinus neumayeri) ArchiMer
Ovando, Fernanda; Gimpel, Carla; Cardenas, Constanza; Machado Cunha Da Silva, Jose Roberto; De Lorgeril, Julien; Gonzalez, Marcelo.
We have cloned and characterized for the first time an allograft inflammatory factor 1 (Sn-AIF-1) from the Antarctic sea urchin. We report the cloning of Sn-AIF-1 cDNA and the characterization of its expression in coelomocytes after a bacterial challenge. The cDNA Sn-AIF-1 has a size of 608 bp and encodes a polypeptide of 151 aa. The deduced amino acid sequence has a putative size of 17.430 Da, an isoelectric point of 4.92, and shows 2 elongation factor handlike motifs that normally bind calcium ions. BLAST analysis revealed close matches with other known AIF-1. The deduced amino acid sequence of Sn-AIF-1 showed high homology with AIF-1 in vertebrates such as fish, mice, and humans; and in the case of invertebrates, the major degree of identity (55%) was...
Tipo: Text Palavras-chave: Antarctica; Sea urchin; Sterechinus neumayeri; Coelomocytes; Gene expression; AIF-1.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00098/20955/18572.pdf
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Distribution of Mysidium integrum (Tattersall) (Crustacea-mysidacea) in Venezuelan coral habitats Naturalis
Zoppi de Roa, Evelyn; Pedro Alonso, G..
ZOPPI DE ROA, EVELYN & PEDRO ALONSO G.: Distribution of Mysidium integrum (Tattersall) (Crustacea: Mysidacea) in Venezuelan coral habitats. Studies Nat. Hist. Caribbean Region 73, Amsterdam 1997: 55-62. This paper reports the occurrence, distribution and some ecological aspects of mysids in six coral habitats along the northern coast of Venezuela. Collections of mysid fauna were made during various months in the years 1980-1983, with simultaneous measurement of environmental conditions. Only Mysidium integrum (TATTERSALL 1951) has been found to be present in the protected zones of various coral species, and between the spines of the sea urchin Diadema antillarum (Philippi). Depth of water and type of association appear to be critical factors affecting...
Tipo: Article / Letter to the editor Palavras-chave: Microhabitat; Sea urchin; Mysidium integrum; Venezuela.; Coral.
Ano: 1997 URL: http://www.repository.naturalis.nl/record/503185
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Echinoid associations with coral habitats differ with taxon in the deep sea and the influence of other echinoids, depth, and fishing history on their distribution ArchiMer
Stevenson, Angela; Davies, Jaime S.; Williams, Alan; Althaus, Franziska; Rowden, Ashley A.; Bowden, David A.; Clark, Malcolm R.; Mitchell, Fraser J. G..
Patterns of habitat use by animals and knowledge of the environmental factors affecting these spatial patterns are important for understanding the structure and dynamics of ecological communities. Both aspects are poorly known for deep-sea habitats. The present study investigates echinoid distributions within cold water coral (CWC) habitats on continental margins off France, Australia, and New Zealand. It further examines the influence of habitat-related variables that might help explain the observed distribution of echinoid taxa. Six echinoid taxa were examined from video and photographic transects to reveal taxon-specific distribution patterns and habitat-related influences. The Echinoidea were found in all habitats studied, but tended to aggregate in...
Tipo: Text Palavras-chave: Cidaroidea; Echinothuriidae; Fishing intensity; Habitat characteristics; Predator activity; Sea urchin.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00423/53476/56749.pdf
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Expression pattern of heat shock proteins during acute thermal stress in the Antarctic sea urchin, Sterechinus neumayeri RChHN
González,Karina; Gaitán-Espitia,Juan; Font,Alejandro; Cárdenas,César A.; González-Aravena,Marcelo.
BACKGROUND: Antarctic marine organisms have evolved a variety of physiological, life-history and molecular adaptations that allow them to cope with the extreme conditions in one of the coldest and most temperature-stable marine environments on Earth. The increase in temperature of the Southern Ocean, product of climate change, represents a great challenge for the survival of these organisms. It has been documented that some Antarctic marine invertebrates are not capable of generating a thermal stress response by means of an increase in the synthesis of heat shock proteins, which could be related with their low capacity for acclimatization. In order to understand the role of heat shock proteins as a compensatory response in Antarctic marine species to...
Tipo: Journal article Palavras-chave: HSP; Thermal tolerance; Chaperones; Ocean warming; Sea urchin.
Ano: 2016 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2016000100002
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Faecal contamination of echinoderms: first report of heavy Escherichia coli loading of sea urchins from a natural growing area ArchiMer
Bouchoucha, Marc; Piquet, Jean-come; Chavanon, Fabienne; Dufresne, C.; Le Guyader, Soizick.
Although little evidence existed to support that view, European countries and in particular France, have regarded echinoderms, including sea urchins, as low risk in terms of feacal contamination. It is hypothesized that the sea urchins mode of feeding, which is based on grazing and differs from bivalve molluscs, would prevent it from concentrating high levels of Escherichia coli. Here, we monitored E. coli levels in sea urchins (Paracentrotus lividus) and in filter-feeder mussels (Mytillus galloprovincialis), collected concurrently from the same natural area over a 1-year period to verify this assumption. Sea urchins were collected on the seafloor, whereas mussels were collected from the water column at a depth of 4 m. Our results showed heavy bacterial...
Tipo: Text Palavras-chave: E. coli; Fecal contamination; Mussel; Sea urchin; Shellfish monitoring program.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00310/42086/41400.pdf
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Immune response of the Antarctic sea urchin Sterechinus neumayeri: cellular, molecular and physiological approach ArchiMer
Gonzalez-aravena, Marcelo; Perez-troncoso, Carolina; Urtubia, Rocio; Branco, Paola; Machado Cunha Da Silva, Jose Roberto; Mercado, Luis; De Lorgeril, Julien; Bethke, Jorn; Paschke, Kurt.
In the Antarctic marine environment, the water temperature is usually between 2 and - 1.9 degrees C. Consequently, some Antarctic species have lost the capacity to adapt to sudden changes in temperature. The study of the immune response in Antarctic sea urchin (Sterechinus neumayeri) could help us understand the future impacts of global warming on endemic animals in the Antarctic Peninsula. In this study, the Antarctic sea urchins were challenged with lipopolysaccharides and Vibrio alginolitycus. The cellular response was evaluated by the number of coelomocytes and phagocytosis. A significant increase was observed in red sphere cells and total coelomocytes in animals exposed to LPS. A significant rise in phagocytosis in animals stimulated by LPS was also...
Tipo: Text Palavras-chave: Sea urchin; Antarctica; Sterechinus neumayeri; Coelomocytes; Phagocytosis; Gene expression.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00439/55012/56441.pdf
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Initial peptidomic profiling of Brazilian sea urchins: Arbacia lixula, Lytechinus variegatus and Echinometra lucunter J. Venom. Anim. Toxins incl. Trop. Dis.
Sciani,Juliana Mozer; Emerenciano,Andrews Krupinski; Silva,José Roberto Machado Cunha da; Pimenta,Daniel Carvalho.
Abstract Background Sea urchins can be found throughout the Brazilian coast and are reported to be one of the major causes of marine accidents on the shoreline. Although not lethal, these accidents are reported to be extremely painful. In order to understand the toxinology of the Brazilian urchins, a peptidomic approach was performed aiming to characterize the naturally occurring peptides in both the coelomic fluid and the spine. Methods Animals were collected without gender distinction and samples of the coelomic fluid and spines extracted were analyzed by RP-HPLC and mass spectrometry for peptide de novo sequencing. Results Several peptides were identified either in the coelomic fluid or the spine extract (except for E. lucunter). The peptide...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Peptides; Toxins; Sea urchin; Peptidomics.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992016000100313
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Preliminary molecular characterization of a proinflammatory and nociceptive molecule from the Echinometra lucunter spines extracts J. Venom. Anim. Toxins incl. Trop. Dis.
Sciani,Juliana Mozer; Zychar,Bianca; Gonçalves,Luis Roberto; Giorgi,Renata; Nogueira,Thiago; Pimenta,Daniel Carvalho.
Abstract Background Sea urchins are animals commonly found on the Brazilian shoreline, being Echinometra lucunter the most abundant species. Accidents caused by E. lucunter have been reported as one of the most frequent in Brazil, and are characterized by intense pain and inflammation, consequence of spine puncture in the skin. In order to characterize such toxic effects, we isolated one molecule that caused inflammatory and nociceptive effects. Methods E. lucunter specimens were collected without gender distinction. Spines were removed and molecules were extracted, fractionated by RP-HPLC and assayed for inflammatory and nociceptive activity, in a biological-driven fractionation way, until the obtainment of one active molecule and its subsequent...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Toxins; Sea urchin; Echinometra lucunter; Spines; Inflammation.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992017000100318
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Reproductive biology of Echinometra lucunter (Echinodermata: Echinoidea) in a northeast Brazilian sandstone reef Anais da ABC (AABC)
Lima,Eduardo J.B.; Gomes,Paula B.; Souza,José R.B..
The edible sea urchin Echinometra lucunter (Linnaeus, 1758) is a very common species on the sublittoral-midlittoral in Brazilian rocky shores. The aim of this work was to describe the gametogenesis and reproductive strategy of the E. lucunter population at Muro Alto beach in the Northeast coast of Brazil from August 2004 to August 2005. A total of 240 specimens were collected on the sandstone reef flat from a tidepool during spring low tides. The overall sex ratio was1.12:1,withoutsignificanttemporalvariationexceptinOctober2004. Firsts sexual maturity ocurred in individuals from a diameter of 20.8 mm. There was not a significant difference in gonad index between females and males during the sampling period. The female's gonad index variation was associated...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Beach rock; Brazil; Echinodermata; Reproduction; Sea urchin.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652009000100007
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Sperm and Egg Jelly Coat from Sea Urchin Lytechinus variegatus Collected in Rio de Janeiro Contain Distinct Sialic Acid-Rich Polysaccharides BABT
Valle,Gabrielle M.; Cinelli,Leonardo P.; Todeschini,Adriane R.; Brito-Gitirana,Lycia de; Vilela-Silva,Ana-Cristina E.S.; Mourão,Paulo A.S..
This work found the occurrence of a distinct sialic acid-rich polysaccharide in the sperm surface of the sea urchin Lytechinus variegatus, which differed significantly from a similar molecule found in the egg jelly. The sperm polysaccharide extracted by protease digestion was purified using anion exchange chromatography and characterized using agarose gel electrophoresis, gas chromatography/mass spectrometry and NMR spectroscopy. This polysaccharide was highly sulfated and composed almost exclusively of N-acetylneuraminic acid. In contrast, the sialic acid-rich polysaccharide from the egg jelly was composed of N-glycolylneuraminic acid and contains several other hexoses in its structure. This new molecule could help to characterize in further detail the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sea urchin; Sperm; Egg jelly coat; Fertilization; Sialic acid; Sulfated polysaccharide.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000400617
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Tidal level influence on the spawning process of the sea urchin Paracentrotus lividus (Lamarck, 1816) on a rocky shore (Bay of Biscay). ArchiMer
De Casamajor, Marie-noelle; Mahias, Jeremy; Castets, Virginie; Caill-milly, Nathalie; Bru, Noelle; Lissardy, Muriel.
The sea urchin Paracentrotus lividus is an important exploited resource on the Mediterranean coast and has been the subject of much research. In the Bay of Biscay, the situation is different, as some studies have been conducted on the Spanish Basque coast but few on the French part of that coast. However, the Basque coast offers favourable conditions for the development of this species, and its exploitation could be a source of potential diversification for fishermen, especially in the context of difficulties with some other resources. At the request of the managers of this coastal resource, a study was undertaken on sea urchins to improve knowledge of this stock, particularly about its biological characteristics. In this work, assessment consisted of...
Tipo: Text Palavras-chave: Sea urchin; Bay of Biscay; Spawning; Tidal level; Rocky coast.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00361/47216/47172.pdf
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Toxicological Investigations on the Sea Urchin Tripneustes gratilla (Toxopneustidae, Echinoid) from Anaho Bay (Nuku Hiva, French Polynesia): Evidence for the Presence of Pacific Ciguatoxins ArchiMer
Darius, Helene Taiana; Roue, Melanie; Sibat, Manoella; Viallon, Jerome; Gatti, Clemence Mahana Iti; Vandersea, Mark W.; Tester, Patricia A.; Litaker, R. Wayne; Amzil, Zouher; Hess, Philipp; Chinain, Mireille.
The sea urchin Tripneustes gratilla (Toxopneustidae, Echinoids) is a source of protein for many islanders in the Indo-West Pacific. It was previously reported to occasionally cause ciguatera-like poisoning; however, the exact nature of the causative agent was not confirmed. In April and July 2015, ciguatera poisonings were reported following the consumption of T. gratilla in Anaho Bay (Nuku Hiva Island, Marquesas archipelago, French Polynesia). Patient symptomatology was recorded and sea urchin samples were collected from Anaho Bay in July 2015 and November 2016. Toxicity analysis using the neuroblastoma cell–based assay (CBA-N2a) detected the presence of ciguatoxins (CTXs) in T. gratilla samples. Gambierdiscus species were predominant in the benthic...
Tipo: Text Palavras-chave: Ciguatera poisoning; Ciguatoxins; Tripneustes gratilla; Sea urchin; Echinoidea; Gambierdiscus polynesiensis; Windowscreens; Artificial substrates; QPCR assays; CBA-N2a; LC-MS/MS.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00436/54716/56153.pdf
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