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Registros recuperados: 7
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A study on the Gut contents of live Juvenile Loggerhead Turtles, Caretta Caretta (Linnaeus) (Reptilia, Cheloniidae), from the South-Eastern part of the North Atlantic Ocean, with emphasis on Coelenterate Identification Naturalis
Nierop, M.M. van; Hartog, J.C. den.
The gut contents of five juvenile individuals of the loggerhead turtle Caretta caretta (L.) from waters around Madeira, Selvagem Grande (Selvagens Islands) and São Miguel (Azores) were analysed macro- and microscopically. Macroscopic investigations showed that epipelagic salps (e.g., Pyrosoma atlanticum Péron) and gastropods (e.g., Ianthina spp. and Pterotrachea spp.) constituted an important part of the food remains present in these loggerheads. To a lesser extent this also holds for organisms such as goose-barnacles (Lepas spp.). and Idotea metallica Bosc, which live on drifting materials, including algae. Microscopic examination revealed the presence in all turtles of large numbers of nematocysts, deriving mainly from Siphonophora and to a lesser extent...
Tipo: Article / Letter to the editor Palavras-chave: Cheloniidae; Caretta caretta; Food; Nematocysts; Siphonophora; Hydromedusae; Scyphozoa; Crustacea; Mollusca; Tunicata; South-eastern North Atlantic; 42.82.
Ano: 1984 URL: http://www.repository.naturalis.nl/record/319311
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An evaluation of the systematics of the genus Thalia (Thaliacea, Salpidae) based on new material from the EASTROPAC and MORO expeditions Naturalis
Daponte, Maria C.; Castro, Roberto J.; Esnal, Graciela B..
Until 1973, when Van Soest revised Thalia Blumenbach, 1798, this genus comprised only two species: Thalia democratica (Forsskål, 1775) and Thalia longicauda (Quoy & Gaimard, 1824). The former showed great variability, which led Van Soest to distinguish five species: T. rhomboides, T. cicar, T. democratica, T. orientalis, and T. sibogae. Some authors have ignored this revision considering the observed differences of infraspecific level. In the present work new material is studied analysing variables not previously considered, such as the development of blastogenic stolons in the solitary zooids and the location of the tunnel opening through which the bud blocks are liberated. These characters previously permitted a separation of closely related species...
Tipo: Article / Letter to the editor Palavras-chave: Tunicata; Salpidae; Thalia; Thalia democratica group.
Ano: 1996 URL: http://www.repository.naturalis.nl/record/503970
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Ascidians at Currais islands, Paraná, Brazil: taxonomy and distribution Biota Neotropica
Rocha,Rosana Moreira da; Faria,Suzana Barros de.
The Currais Islands is a group of a few small rocky islands in the state of Paraná, in southern Brazil, which provides an interesting location for the study of ascidians. Subtidal diversity is very high and the islands have recently been proposed as a Conservation Unit. A field study was established on the largest island to understand ascidian distributions on spatial and temporal scales. Transects, sampled three times during 2002 and 2003, were established on northern and southern locations of the island as well as at three depths. Twenty species were recorded; the most common were Didemnum rodriguesi, Didemnum speciosum and Didemnum granulatum. Three species are possibly new and will be described elsewhere. An additional nine are new records for the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ascidiacea; Tunicata; Taxonomy; Spatial distribution; Temporal distribution.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032005000300013
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Introduced ascidians in Paranaguá Bay, Paraná, southern Brazil Zoologia
Rocha,Rosana M. da; Kremer,Laura P..
Exotic (introduced) species are a growing problem in ports worldwide and comprise the most important impacts in marine ecosystems. Periodic monitoring to detect introduced species is extremely important for effective population control. Here we sampled ascidian species near the port of Paranaguá for a taxonomic study of this fauna to attempt to detect introduced species. Larval stages in ascidians are short-lived, and dispersal is restricted to small distances, and so ascidians are very good bioindicators for exotic introductions due to ship transport. Four locations were sampled within Paranaguá Bay (Ilha das Cobras, Pier Tenenge, Ilha do Mel and Ilha da Galheta) and one location outside of the bay (Parque dos Meros). Information for the nearby fauna and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ascidiacea; Tunicata; Introduced species; Bioinvasion.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000400052
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Keys for the identification of families and genera of Atlantic shallow water ascidians Biota Neotropica
Rocha,Rosana Moreira da; Zanata,Thais Bastos; Moreno,Tatiane Regina.
Here we present tabular keys for families and genera of ascidian species found in shallow waters in the Atlantic Ocean. Characters used in the keys are illustrated or shown in photos of dissected animals and we also provide generalized drawings of all genera. A list of species in each genus and their geographical distribution in the Atlantic is also included, totaling 461 species.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ascidiacea; Tunicata; Taxonomy; Checklist; Geographic distribution.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000100022
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Non indigenous ascidians in port and natural environments in a tropical Brazilian bay Rev. Bras. Zool.
Marins,Flávia O.; Novaes,Roberto L. M.; Rocha,Rosana M.; Junqueira,Andrea O. R..
Despite limited natural dispersal, some species of ascidians can be transported vast distances via oceanic petroleum platforms, ship hulls and ballast water and therefore may be good indicators of bioinvasion. Usually non indigenous species (NIS) are abundant in harbors. This is caused in part because of the higher propagule delivery rate in these areas. An alternative explanation of why invasion is enhanced in harbor and marinas is that environmental degradation commonly found in these habitats favors the establishment of NIS. Most surveys for introduced species were not comprehensive and targeted mainly ports and marinas. Angra dos Reis is an excellent system that provides an opportunity to compare the potential distribution of introduced and native...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Artificial substrate; Bioinvasion; Exotic species; Organic pollution; Tunicata.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000200009
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Original watercolours donated by Cornelius Sittardus to Conrad Gesner, and published by Gesner in his (1558-1670) works on aquatic animals Naturalis
Holthuis, L.B..
Some original watercolours, that were donated by the sixteenth century physician Cornelius Sittardus, to Conrad Gesner, who published them in his "Historia Animalium Liber IV(1558), at present are kept in the National Museum of Natural History of Leiden. These watercolours are discussed here, as well as the other figures of the Sittardus collection published by Gesner.
Tipo: Article / Letter to the editor Palavras-chave: Conrad Gesner; Cornelius Sittardus; Gysbertus Horstius; Cetacea; Pisces; Tunicata; Coelenterata; Mollusca; Echinodermata; Insecta; Crustacea Decapoda; Fungi; Original 16th century illustrations; 42.01.
Ano: 1996 URL: http://www.repository.naturalis.nl/record/317918
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