Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 13
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Assessment of the exposure pathway in the uptake and distribution of americium and cesium in cuttlefish (Sepia officinalis) at different stages of its life cycle ArchiMer
Bustamante, Paco; Teissier, J.l; Warnau, M.
Laboratory radiotracer experiments were performed to study the uptake, assimilation and retention of americium (241Am) and cesium (134Cs) by the common cuttlefish Sepia officinalis. Uptake and loss kinetics of the radionuclides were measured following exposure through sediments, seawater and food at different stages of the animal's life cycle. Sediment was found to be a minor uptake pathway for both radionuclides in juveniles. Following a short seawater exposure, cuttlefish accumulated 241Am and 134Cs, but only to a limited extent (whole-body CF < 2). Among the cuttlefish organs, branchial hearts and their appendages displayed the highest degree of uptake for 241Am (CF = 42 and 16, respectively), but these tissues contained low percentage of total 241Am...
Tipo: Text Palavras-chave: Retention; Radionuclides; Cephalopods; Biokinetics; Accumulation.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-1872.pdf
Imagem não selecionada

Imprime registro no formato completo
Contrasting bioaccumulation and transport behaviour of two artificial radionuclides (Am-241 and Cs-134) in cuttlefish eggshell ArchiMer
Bustamante, Paco; Teyssie, J; Fowler, S; Warnau, M.
Radionuclide experiments were performed to study the accumulation, retention and transport of Am-241 and Cs-134 in egos of the common cuttlefish Sepia officinalis. Experiments were designed to determine the processes controlling uptake of both radionuclides following, exposure via seawater. The bioaccumulation of both radionuclides displayed saturation kinetics with steady state in uptake being reached in 10 d for Am-241 and 6 d for (CS)-C-134. Am-241 was readily taken up by the eggs which reached a concentration factor (CF) of 20 after 10 d of exposure. During embryonic development. the eggshell acted as an effective shield against Am-241 penetration with 98% of the radionuclide associated with this membrane. In contrast. (CS)-C-134 was transported across...
Tipo: Text Palavras-chave: Cephalopods; Bioaccumulation; Biokinetics; Radionuclides.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-1871.pdf
Imagem não selecionada

Imprime registro no formato completo
Environmentally driven synchronies of Mediterranean cephalopod populations ArchiMer
Keller, Stefanie; Quetglas, Antoni; Puerta, Patricia; Bitetto, Isabella; Casciaro, Loredana; Cuccu, Danila; Esteban, Antonio; Garcia, Cristina; Garofalo, Germana; Guijarro, Beatriz; Josephides, Marios; Jadaud, Angelique; Lefkaditou, Evgenia; Maiorano, Porzia; Manfredi, Chiara; Marceta, Bojan; Micallef, Reno; Peristeraki, Panagiota; Relini, Giulio; Sartor, Paolo; Spedicato, Maria Teresa; Tserpes, George; Hidalgo, Manuel.
The Mediterranean Sea is characterized by large scale gradients of temperature, productivity and salinity, in addition to pronounced mesoscale differences. Such a heterogeneous system is expected to shape the population dynamics of marine species. On the other hand, prevailing environmental and climatic conditions at whole basin scale may force spatially distant populations to fluctuate in synchrony. Cephalopods are excellent case studies to test these hypotheses owing to their high sensitivity to environmental conditions. Data of two cephalopod species with contrasting life histories (benthic octopus vs nectobenthic squid), obtained from scientific surveys carried out throughout the Mediterranean during the last 20 years were analyzed. The objectives of...
Tipo: Text Palavras-chave: Cephalopods; Mediterranean; MEDITS; Dynamic factor analysis; Synchrony; Octopus vulgaris; Illex coindetii.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00371/48207/48320.pdf
Imagem não selecionada

Imprime registro no formato completo
Female description of the hydrothermal vent cephalopod Vulcanoctopus hydrothermalis ArchiMer
Gonzalez, A; Guerra, A; Pascual, S; Segonzac, Michel.
During biological sampling of hydrothermal vents on the East Pacific Rise, the manned submersible 'Nautile' caught the first female of the endemic cephalopod Vulcanoctopus hydrothermalis. The specimen caught at the vent site Gromit (21 degrees 33 66'S, 114 degrees 17 98'W at 2832 m depth) is described here in detail and an amended diagnosis of the species proposed. The external morphology, measurements and internal structure resemble that Of males of this species. One of the most remarkable characters is the lack of spermathecae and the absence of apical filaments in the oocytes to provide a site for sperm storage. It is suggested that some species of the genera Benthoctopus and Bathypolypus would be the most suitable octopod ancestor of V. hydrothermalis.
Tipo: Text Palavras-chave: Female description; Vulcanoctopus hydrothermalis; Cephalopods; Hydrothermal vent.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4044.pdf
Imagem não selecionada

Imprime registro no formato completo
Geographic, seasonal and ontogenetic variation in cadmium and mercury concentrations in squid (Cephalopoda : Teuthoidea) from UK waters ArchiMer
Pierce, G; Stowasser, G; Hastie, L; Bustamante, Paco.
Cadmium (Cd) and mercury (Hg) levels were measured in the tissue samples of two loliginid (Alloteuthis sp. and Loligo forbesi) and two ommastrephid (Todarodes sagittatus and Todaropsis eblanae) squid species collected from research cruise and fishery (market) samples in UK waters during 2004-05. Concentrations of Cd were generally higher in the ommastrephids, in all tissues except muscle. Hg concentrations were higher in T sagittatus than in the loliginids. In L. forbesi, metal concentrations differed between tissues and also varied in relation to body size, geographic origin, and season. Cd levels decreased with increasing body size. This may be related to a shift in the diet with growth, since small L. forbesi feed on benthic invertebrates that have...
Tipo: Text Palavras-chave: Risk for human consumption; Bioaccumulation; Trace elements; Heavy metals; Cephalopods.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4356.pdf
Imagem não selecionada

Imprime registro no formato completo
Gladius and statolith as tools for age and growth studies of the squid Loligo plei (Teuthida: Loliginidae) off southern Brazil BABT
Perez,José Angel Alvarez; Aguiar,Daniela Cordella de; Santos,João Antônio Teixeira dos.
Statolith and gladius were investigated for their suitability as tools for age and growth studies in the loliginid squid Loligo plei off southern Brazil. Statoliths when polished, revealed a series of concentric increments deposited around a nucleus. Consistent increment counts covered the squid's entire life-time and could be considered suitable for individual age estimation. Growth increments were observed on the dorsal surface as delimited by consecutive marks formed during low growth periods. Because early growth was masked during chitin deposition, total increment counts underestimated individual age. Gladius growth was highly correlated with somatic growth, and gladius increments could be used to reconstruct individual growth histories. Both...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cephalopods; Statolith; Gladius; Age; Loligo plei; Growth.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000600009
Imagem não selecionada

Imprime registro no formato completo
Les Cephalopodes recoltes en Mediterranee par le 'Jean-Charcot'. Campagnes Polymede 1 et 2 ArchiMer
Mangold-wirz, Katharina.
Eleven spp of cephalopod were collected with the Isaacs Kidd midwater trawl during the Polymede expeditions on the N.O. 'Jean Charcot' in the western Mediterranean and in the vicinity of Cap Finisterre. The most abundant sp was Histioteuthis reversa. 14 spp were collected with the bottom trawl Marinovitch in the western part of the Alboran Sea. The most abundant mesobenthic sp was Bathypolypus sponsalis. The specimens, very similar to the type specimen from the Atlantic, are very different from the animals captured in the Catalonian Sea.
Tipo: Text Palavras-chave: Mediterrean sea; Identification; Trawled species; Cephalopods.
Ano: 1973 URL: http://archimer.ifremer.fr/doc/1973/publication-2152.pdf
Imagem não selecionada

Imprime registro no formato completo
MICROANATOMY OF THE DIGESTIVE SYSTEM OF ENTEROCTOPUS MEGALOCYATHUS (CEPHALOPODA, OCTOPODA) OF THE SOUTHWEST ATLANTIC Boletín de Investigaciones
Griselda Garri,Rosana; Lauria de Cidre,Lilia.
A detailed description of the microanatomy of the digestive system of Enteroctopus megalocyathus is given, and this revealed some differences between this octopod species and other species of Octopodidae previously described. These differences are mainly related to tissues lining the lumen of digestive organs. Unlike descriptions in some octopods mucosa, in E. megalocyathus a pseudostratified epithelium is found covering the lumen of oesophagus, crop, stomach, intestine and caecum. Another major finding is that in the posterior salivary glands, two cell types are present in the same tubular adenomere; they do not constitute independent glandular tubules with only one type of glandular cells. The tubules of these glands are lined by two distinct epithelial...
Tipo: Journal article Palavras-chave: Histology; Digestive organs; Cephalopods; Southwest Atlantic; Enteroctopus megalocyathus.
Ano: 2013 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612013000200003
Imagem não selecionada

Imprime registro no formato completo
Morphological and morphometric variability of the squid Lolliguncula brevis (Mollusca: Cephalopoda) in Brazilian waters: evidence for two species in the western atlantic? Anais da ABC (AABC)
Zaleski,Tânia; Perez,José A. Angel; Gandara-Martins,Ana luiza.
Morphological and morphometric variability of the small-sized coastal squid Lolliguncula brevis was assessed along the largest part of its latitudinal range in the southern hemisphere, off the Brazilian coast (8º S - 27º S). A general homogeneity in form was found throughout the entire latitudinal range. In terms of body proportions, no latitudinal gradients were evident, but a few local "morphotypes" could be distinguished. The distinctive egg mass morphology, and size and form features, including a hectocotylus 20-40% longer than the opposing ventral arm and the presence of suckers on the buccal membrane, indicated that Lolliguncula from northern and southern hemispheres might comprise two different taxa.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cephalopods; Morphology; Loliginidae; Brazil.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000400016
Imagem não selecionada

Imprime registro no formato completo
Partial characterization of hepatopancreatic and extracellular digestive proteinases of wild and cultivated Octopus maya ArchiMer
Martinez, Romain; Santos, R.; Alvarez, A.; Cuzon, Gerard; Arena, L.; Mascaro, M.; Pascual, C.; Rosas, C..
Proteinases from hepatopancreas (HP) and gastric juice (GJ) from wild and cultured red octopus (Octopus maya) were characterized. Hepatopancreas assays revealed optimal activity at pH 4, 9-10 and 10 for wild and pH 3, 8, and 9, for cultured octopuses, for total proteinases, trypsin and chymotrypsin, respectively. In the gastric juice, maximum activity was recorded at pH 6, 8, and 7 for total proteinases, trypsin, and chymotrypsin, respectively for both wild and cultured octopus. A reduction on enzyme activity of 70 and 20% was observed in HP and GJ extracts, respectively when protease inhibitor Pepstatin A was used. That result suggests that the main proteases in the HP were aspartic acid proteinases type (possibly Cathepsin D) and some of them were...
Tipo: Text Palavras-chave: Cephalopods; Digestive proteinases; Hepatopancreas; Gastric juice; Octopus maya.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00036/14683/17998.pdf
Imagem não selecionada

Imprime registro no formato completo
Recognizing cephalopod boreholes in shells and the northward spread of Octopus vulgaris Cuvier, 1797 (Cephalopoda, Octopodoidea) Naturalis
Hiemstra, Auke-Florian.
Octopuses prey on molluscs by boring through their shell. Among the regular naticid borings, traces of cephalopod predation should be found soon on Dutch beaches. Bottom trawling has declined, and by the effects of global warming Octopus will find its way back to the North Sea where it lived before. I describe the distinguishing characters for Octopus bore holes, give an introduction into this type of behaviour, present a short history of Dutch octopuses and a prediction of their future.
Tipo: Article / Letter to the editor Palavras-chave: Cephalopods; Octopus; Predation; Hole-boring; The Netherlands.
Ano: 2015 URL: http://www.repository.naturalis.nl/record/588033
Imagem não selecionada

Imprime registro no formato completo
The diet of the South American sea lion (Otaria flavescens) at Río Negro, Patagonia, Argentina, during the winter-spring period Iheringia, Sér. Zool.
Bustos,Raimundo L.; Daneri,Gustavo A.; Volpedo,Alejandra V.; Harrington,Ana; Varela,Esperanza A..
The South American sea lion, Otaria flavescens (Shaw, 1800) population is steadily expanding along the Patagonian coast of Argentina in the last decades. However, little is known about the feeding ecology of the species in the area. The aim of this study was to analyze the food habits of O. flavescens from 91 scats collected at Río Negro province, during the winter and spring of 2005. Fish occurred in 96% of scats containing prey remains, followed by cephalopods (26%). Raneya brasiliensis (Kaup, 1856) was the most frequent and abundant species occurring in 58.6% of samples and constituting almost 50% of fish predated. Second in importance were Porichthys porosissimus (Cuvier, 1829) and Cynoscion guatucupa (Cuvier, 1830) in terms of occurrence (%FO 20.7)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Trophic ecology; Pinnipedia; Fishes; Cephalopods.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212012000400005
Imagem não selecionada

Imprime registro no formato completo
Variation of heavy metal concentrations (Ag, Cd, Co, Cu, Fe, Pb, V, and Zn) during the life cycle of the common cuttlefish Sepia officinalis ArchiMer
Miramand, Pierre; Bustamante, Paco; Bentley, Daniel; Koueta, Noussithe.
The developmental changes in the concentration of 8 essential and non-essential heavy metals (Ag, Cd, Cu, Co, Fe, Pb, V, Zn) in the tissues (digestive gland, cuttlebone and whole animal) of the common cuttlefish Sepia officinalis collected in the bay of the river Seine were monitored from the end of the embryogenesis until the adult reproductive stage. Compared to embryos, juveniles after hatching displayed much higher concentrations of Ag, Cu, Fe and Zn, suggesting an efficient incorporation from seawater. Conversely, the amounts of Cd, Pb and V in hatchlings remained constant suggesting that these metals are barely bioavailable for juveniles. Once the juveniles start to feed, the digestive gland appears to play a major role in the storage of all metals....
Tipo: Text Palavras-chave: Embryogenesis; Sexual maturity; Cephalopods; Detoxification; Bioaccumulation; Trace element.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-2330.pdf
Registros recuperados: 13
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional