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| Registros recuperados: 149 | |
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| Luz, Karla Danielle Gaspar da; UEM; Fugi, Rosemara; UEM; Abujanra, Fabiane; UEM; Agostinho, Angelo Antonio; UEM. |
| Foram avaliadas as alterações na dieta de Pterodoras granulosus (Osteichthyes, Doradidae), no reservatório de Itaipu, no período de 1994 a 1998, associadas às alterações na abundância de um bivalve invasor, Corbicula fluminea, considerando-se dois eventos: (i) a explosão de C. fluminea no reservatório a partir de 1994, e (ii) a mortandade desse bivalvia em função das flutuações do nível de água a partir de julho/96. Os conteúdos estomacais, foram analisados pelos métodos de ocorrência e volumétrico, combinados no Índice Alimentar. A análise mostrou que C. fluminea foi o principal alimento nos anos de 94/95/96, representando aproximadamente 90% da dieta. Em 1997, houve uma queda no consumo de C. fluminea (39% da dieta), concomitante a um incremento no... |
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Palavras-chave: 2.00.00.00-6 Ciências Biológicas dieta; Pterodoras granulosus; Bivalvia; Reservatório de Itaipu 2.00.00.00-6 Ciências Biológicas. |
| Ano: 2002 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/2315 |
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| del Río,Claudia J.. |
| El registro más antiguo del género Nodipecten Dall corresponde al Mioceno temprano alto, momento durante el cual tuvo, de acuerdo al registro fosilífero conocido hasta el momento, una distribución discontinua sobre el litoral atlántico occidental, registrándoselo en Patagonia y en la región caribeña. A fines del Mioceno medio se extinguió en Patagonia y desde entonces permaneció restringido a las latitudes tropicales del continente americano hasta hoy, expandiéndose al área tropical del Pacífico oriental en el Mioceno tardío. Su asociación a taxones paratropicales en Patagonia indica el desarrollo de aguas cálido-templadas en la región, reflejando el Óptimo Climático del Neógeno y su extinción en la región y su retracción a latitudes tropicales coincidió... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Terciario; Mioceno; Mollusca; Bivalvia; Pectinidae; Nodipecten; Lyropecten; Patagonia. |
| Ano: 2006 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142006000400009 |
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| Márquez-Aliaga,Ana; Damborenea,Susana; Gómez,Juan José; Goy,Antonio. |
| Bivalve mollusks from the Triassic-Jurassic transition collected in eight localities in Asturias and the western Basque-Cantabrian Basin (Palencia province) are systematically revised. Preservation is poor at all localities. The dominant Rhaetian bivalves are Isocyprina concentrica (Moore) and Bakevellia (Bakevelloides) praecursor (Quenstedt). These species, together with Isocyprina cf. ewaldi (Bornemann), Pteromya cf. crowcombeia (Moore), Pseudoplacunopsis alpina (Winkler), and Modiolus? sp. (cf. minimus J. Sowerby), with a specimen of Arcestidae (?), belong to an assemblage similar to that found in the Westbury and Lilstock formations (Penarth Group) in the late Rhaetian of southern England. The most abundant Hettangian species is Isocyprina... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triassic-Jurassic boundary; Rhaetian; Hettangian; Bivalvia; Asturias; Palencia; Spain. |
| Ano: 2010 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142010000200004 |
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| Griffin,Miguel; Parras,Ana; Casadío,Silvio. |
| The Upper Cretaceous - lower Paleogene rocks from northern Patagonia yield a rich fauna of marine mollusks that may be useful in elucidating paleobiogeographic and paleoenvironmental changes taking place across the K/P boundary in the region. Most of the mollusk faunas remain poorly understood, as the preservation is generally deficient. This paper describes three new species of mytilids (Septifer mayai n. sp., Mytilaster ? edseli n. sp. and Gregariella amara n. sp.), and records four species of pinnids, one of which is new (Plesiopinna pampeana n. sp.). All the material comes from the Maastrichtian Jagüel Formation, and the Maastrichtian/Danian Roca Formation, exposed in the provinces of Río Negro, Mendoza and La Pampa (Argentina). A survey of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bivalvia; Mytilids; Pinnids; Cretaceous/Paleogene boundary; Argentina. |
| Ano: 2008 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142008000100009 |
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| Martínez,Sergio; Rojas,Alejandra; Ubilla,Martín; Verde,Mariano; Perea,Daniel; Piñeiro,Graciela. |
| Dates of marine Holocene molluscs from Uruguay (Villa Soriano Formation) range from 6849 to 1858 cal. years BP. There are no significative gaps among the different ages obtained, with the exception of the interval 2276-2830 calculated years BP. Two kinds of concentrations are distinguished: autochthonous, for which a low energy depositional environment is inferred, and parautochthonous, deposited in foreshore and nearshore high-energy environments. Results of different types of multivariate analyses on presence-absence and abundance data show that only three localities are clearly differentiated from the others. The discrimination of two of them (Arazatí, Las Cañas) is explained by the presence of only one or two species, but the third (Punta Rasa) is the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Uruguay; Holocene; Paleoecology; Shell-beds; Mollusca; Bivalvia; Gastropoda. |
| Ano: 2006 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142006000200009 |
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| Miyahira,Igor Christo; Carneiro,Jéssica Beck; Gonçalves,Isabela Cristina Brito; Lacerda,Luiz Eduardo Macedo de; Oliveira,Jaqueline Lopes de; Vasconcelos,Mariana Castro de; Santos,Sonia Barbosa dos. |
| Abstract The Guandu River Basin is extremely important to state of Rio de Janeiro, as a water supplier of several municipalities. However, the malacological knowledge and environmental status is not well known to this basin. The aim of this paper is to present an inventory of freshwater mollusks, as well as an environmental assessment through a Rapid Assessment Protocol, of ten sampling sites at Guandu River basin in six municipalities (Piraí, Paracambi, Japeri, Seropédica, Queimados and Nova Iguaçu). Thirteen species of molusks were found, eight native (Pomacea maculata, Biomphalaria tenagophila, Gundlachia ticaga, Gundlachia radiata, Omalonyx matheroni, Diplodon ellipticus, Anodontites trapesialis and Eupera bahiensis) and five exotics (Melanoides... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gastropoda; Bivalvia; Mollusca; Exotic species; RAP. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032017000300305 |
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| Passos,Flávio Dias; Birman,Adolpho. |
| Specimens of Bentharca asperula (Dall, 1881) were obtained from deep waters of the coasts of the Rio de Janeiro and São Paulo States, and their shells described, illustrated and compared with descriptions and illustrations obtained from the literature. This species has a small strongly inequilateral shell, trapezoidal in outline and expanded ventro-posteriorly; their umbos are placed at about 1/3 of the anterior length of their straight hinge line. The external sculpture consists of irregular spaced concentric ridges, intercepted by fine radiating striae; the periostracum is hairy, forming a cover as a thatch. Hinge teeth are small, disposed in two series interrupted by the ligament. With this finding of living specimens from the Bacia de Campos, the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bentharca asperula; Brazil; Arcidae; Bivalvia; Mollusca. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032009000400032 |
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| Lima,Silvio Felipe Barbosa; Lucena,Rudá Amorim; Santos,Galdênia Menezes; Souza,José Weverton; Christoffersen,Martin Lindsey; Guimarães,Carmen Regina; Oliveira,Geraldo Semer. |
| Abstract: Coastal ecosystems of northeastern Brazil have important biodiversity with regard to marine mollusks, which are insufficiently studied. Here we provide an inventory of mollusks from two sites in the estuary of the Paraíba River. Mollusks were collected in 2014 and 2016 on the coast and sandbanks located on the properties of Treze de Maio and Costinha de Santo Antônio. The malacofaunal survey identified 12 families, 20 genera and 21 species of bivalves, 17 families, 19 genera and 20 species of gastropods and one species of cephalopod. Bivalves of the family Veneridae Rafinesque, 1815 were the most representative, with a total of five species. Gastropods of the family Littorinidae Children, 1834 had the greatest species richness. The most abundant... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biodiversity; Mollusca; Gastropoda; Bivalvia; Cephalopoda; Tropical coastal ecosystems. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032017000100302 |
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| Lima,Silvio Felipe Barbosa; Lima,Bianca Vieira; Abreu,Evandro Cosmo; Oliveira,Geraldo Semer Pomponet; Lucena,Rudá Amorim; Mendonça,Luana Marina de Castro; Prata,Jéssica; Souza,J. Weverton S. de. |
| Abstract: The reef ecosystems of Morro de São Paulo are located in the Tinharé-Boipeba Environmental Preservation Area which was established in 1992 in the state of Bahia, Brazil. Despite this area has been created more than two decades ago, no study has provided knowledge on the invertebrate biodiversity associated with such reef ecosystems. The present investigation provides the first inventory of benthic mollusks associated with the reef ecosystems of Morro de São Paulo based on the collection of living specimens and fresh empty as well as some worn shells. Mollusks were sampled in January 2015 and August 2016 through intensive searches from the intertidal to shallow subtidal habitats of the reefs on three beaches of Morro de São Paulo. Taxonomic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alpha diversity; Malacofaunal composition; Gastropoda; Bivalvia; Polyplacophora. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000400312 |
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| Miyahira,Igor Christo; Santos,Sonia Barbosa dos; Mansur,Maria Cristina Dreher. |
| Abstract Unionida is the most diverse clade of freshwater bivalves. Among the groups occurring in South America, one with the highest number of species is Rhipidodontini (Hyriidae, Unionida, Paleoheterodonta, Bivalvia). However several issues remains on taxonomy and systematic of this group, leading to problems on species identification, description, as also as a limiting factor to other type of studies (e.g., ecology, conservation,…). In this paper is presented a synthesis of available knowledge about Diplodon Spix in Wagner, 1827 and Rhipidodonta Mörch, 1853 in South America, as a first step in order to a better understating of Rhipidodontini. The evaluation of different authors exposes the little agreement between them that resulted in a sort of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diplodon; Rhipidodonta; Hyriidae; Bivalvia; Freshwater bivalve. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032017000400601 |
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| Cárdenas,Javiera; Aldea,Cristian; Valdovinos,Claudio. |
| The tip of the South American cone is one of the most interesting Subantarctic areas, both biogeographically and ecologically. Nonetheless, knowledge of the area's biodiversity, in particular that of the subtidal marine habitats, remains poor. Therefore, in 2004, a biodiversity research project was carried out as a part of the cruise Cimar-10 Fjords, organized and supported by the Chilean National Oceanographic Committee (CONA). The results of the subtidal marine mollusk surveys are presented herein. The samples were collected aboard the Agor 60 "Vidal Gormaz" in winter 2004. The study area covered the northern Chilean Patagonia from Seno de Relocanví (41°31'S) to Boca del Guafo (43°49'S), on the continental shelf from 22 to 353 m depth. The Mollusca were... |
| Tipo: Journal article |
Palavras-chave: Biodiversity; Taxonomy; South America; Fjords; Polyplacophora; Gastropoda; Bivalvia; Scaphopoda. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382008000200010 |
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| Набоженко, М. В.. |
| В статье рассматривается морфология, распределение, количественные характеристики популяций и роль в донных сообществах видов рода Hypanis в Таганрогском заливе Азовского моря. Вопрос о видовом составе рода в Таганрогском заливе является спорным. Различными авторами указывалось от 1 до 3 различных видов этого рода, в том числе и эндемиков лиманов и озер Северо-Западного Причерноморья. В заливе представлены два вида Hypanis: H. vitrea glabra и H. colorata. Виды четко отличаются строением лигаментов, створок раковин, мантийной и сифональной мускулатуры. Первый вид является вселенцем из Северного Каспия. Включение его в экосистему Таганрогского залива происходило, вероятно, неоднократно. Однако окончательное освоение вида в заливе произошло, видимо в конце 20... |
| Tipo: Journal Contribution |
Palavras-chave: Bivalvia; Hypanis; Таганрогский залив; Морфология; Распределение; Биомасса; Донные сообщества. |
| Ano: 2005 |
URL: http://repository.ibss.org.ua/dspace/handle/99011/908 |
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| Ellner, S. |
| A brief discussion of the physics involved in the destruction of micro organisms by exposure to 2537A of UV energy: UV dose required for destruction of various micro organisms in a dynamic UV reactor (Bio Assay). History of UV design for shellfish depuration: Kelly Purdy Overhead design, Closed channel reactore, Open channel horizontal reactors, Open channel vertical reactors. Factors which effect UV performance: Chemical make up of water-coefficient of absorption, Physical make up of water-turbidity and Color impact, Overall UV transmission limits for effective disinfection. Discussion of the U.S. Public Health Service: effects of color, turbidity, and bacterial densities on UV performance. Impact of temperature on UV lamp performance. Impact of coating... |
| Tipo: Text |
Palavras-chave: USA Coasts; Bivalvia; Marine molluscs; Storage effects; Ultraviolet radiation; Shellfish culture. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/acte-1630.pdf |
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| Dorange, G; Lepennec, M. |
| The spermatozoon of Pecten maximus is of the primitive type usually associated with species having external fertilization or emitting the sperm in the water. The size of the nucleus is reduced. The middle piece is similar to that reported for several Bivalves. It contains glycogen. But the spermatozoon of P. maximus exhibits its own ultrastructural characteristics: the short acrosome differs in size, shape, position and ultrastructure or by a combination of these from that of many bivalves. No axial rods was observed in contrast to several species of Mytilidae, Veneridae and Ostreidae. These originalities could go to the genus level. |
| Tipo: Text |
Palavras-chave: Pecten maximus; Bivalvia; Ultrastructure; Sperm. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/1991/acte-1725.pdf |
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| Plantecuny, M; Bodoy, Alain. |
| In order to estimate energetic relationship, microphytic and benthic bivalve levels of a shallow (1.5 m), sandy ecosystem near Marseille (Gulf of Fos, Southern France) were sampled monthly during 1.5 year, in two sites differing by their wave exposure. In the sheltered area, the bivalve Ruditapes decussatus was the dominant species, while another bivalve, Donax trunculus , was found in the open, wave exposed site. Chlorophyll a and primary production of the phytoplankton and the microphytobenthos, as well as population dynamic, growth and biochemical composition of bivalves (lipids, proteins and carbohydrates) were monitored. |
| Tipo: Text |
Palavras-chave: Ruditapes decussatus; Bivalvia; Periphyton; Phytoplankton; Biochemical composition; Growth; Marine molluscs; Hydrodynamics; Seasonal variations; Primary production; Trophic relationships. |
| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/1984/acte-1528.pdf |
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| Registros recuperados: 149 | |
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