|
|
|
| Registros recuperados: 242 | |
|
| |
|
| |
|
| |
|
|
| Bonecker,Sérgio L.C.; Araujo,Adriana V. de; Carvalho,Pedro F. de; Dias,Cristina de O.; Fernandes,Luiz F.L.; Migotto,Alvaro E.; Oliveira,Otto M.P. de. |
| We describe the species richness, distribution and composition of mesozooplankton over the continental shelf and slope, and in the water masses in the Campos Basin, southwest Atlantic Ocean. We analyzed the mesozooplankton from two oceanographic cruises (rainy and dry seasons, 2009) with samples taken in five different water masses from the surface to 2,300 m depth. In the Subsurface Water (SS), in both sampling periods, more species were recorded over the slope (rainy: 100; dry: 128) than the continental shelf (rainy: 97; dry: 104). Over the slope, species richness decreased with increasing depth: the highest values were observed in the South Atlantic Central Water (SACW), and the lowest values in the North Atlantic Deep Water (NADW), in both sampling... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Deep sea; Diversity; Southeastern Brazil; Zooplankton. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702014000500005 |
| |
|
|
| Souza,Adelson S. de; Costa,Rauquírio M. da; Abrunhosa,Fernando A.. |
| The laboratory-hatched first zoeal stage of twelve brachyuran species collected in the estuarine area of the Caeté River in the Amazonian region are described and illustrated in the present study: P. americanus Saussure, 1857, Eurytium limosum (Say, 1818), Sesarma curacaoense De Man, 1892, S. rectum Randall, 1840, Armases rubripes (Rathbun, 1897), Aratus pisonii (H. Milne Edwards, 1837), Ocypode quadrata (Fabricius, 1787), Uca rapax (Smith, 1870), U. maracoani (Latreille, 1802), U. thayeri Rathbun, 1900, Ucides cordatus (Linnaeus, 1763) and Pachygrapsus gracilis (Saussure, 1858). Through intraspecific comparisons of the respective larval stage, an identification key was generated and provided. Most of the studied species presented morphological differences... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Decapod crabs; Identification; Larval morphology; Zooplankton. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000300004 |
| |
|
|
| Ríos,Patricio De los; Roa,Guido. |
| Even though the Chilean lakes are characterized by their oligotrophy, a transition from oligotrophy to mesotrophy, due human intervention, has been reported in some lakes. Nevertheless, there are still some pristine and unpolluted small lakes and ponds in mountain zones, free of human intervention and surrounded by native forests. Nine unpolluted, oligotrophic and pristine water bodies located in Cañi Park, a mountain zone with altitudes between 1000 to 1500 m a.s.l and forests where Nothofagus dombeyi, N. pumilio and Araucaria araucana predominate, were studied. For each sampled lake, zooplankton was collected and environmental parameters were obtained (conductivity, total dissolved solids, and chlorophyll concentration). A null model of species... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Boeckella gracilis; Null model; Oligotrophy; Zooplankton. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000100012 |
| |
|
|
| Perbiche-Neves,Gilmar; Rocha,Carlos E.F. da; Nogueira,Marcos G.. |
| Species richness and geographical distribution of Cyclopoida freshwater copepods were analyzed along the "La Plata" River basin. Ninety-six samples were taken from 24 sampling sites, twelve sites for zooplankton in open waters and twelve sites for zooplankton within macrophyte stands, including reservoirs and lotic stretches. There were, on average, three species per sample in the plankton compared to five per sample in macrophytes. Six species were exclusive to the plankton, 10 to macrophyte stands, and 17 were common to both. Only one species was found in similar proportions in plankton and macrophytes, while five species were widely found in plankton, and thirteen in macrophytes. The distinction between species from open water zooplankton and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: La Plata River basin; Reservoirs; Rivers; Zooplankton. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702014000300005 |
| |
|
| |
|
|
| RAMOS-JILIBERTO,RODRIGO; ZÚÑIGA,LUIS R.. |
| Eutrophic temperate and sub-tropical lakes often exhibit a marked vertical structure during the warm season that involves important spatial differences of physical, chemical and biological variables. Therefore, zooplankton is exposed to a highly heterogeneous environment in the vertical dimension. In this work, We analyze the depth-distribution of the cladoceran Daphnia ambigua in the eutrophic, monomictic lake El Plateado at midday and midnight, along with its relationship with the vertical distribution of water temperature and dissolved oxygen concentration. We also attempt to define whether or not this population exhibits a diel vertical migration. The results show significant changes in the day/night vertical distribution of D. ambigua during its... |
| Tipo: Journal article |
Palavras-chave: Chile; Daphnia; Depth-selection; Diel vertical migration; Zooplankton. |
| Ano: 2001 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2001000300007 |
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Mousinho, Lucas Pessanha; Silva, Mariana Lessa Carneiro da; Arrieira, Rodrigo Leite; Schwind, Leilane Talita Fatoreto. |
| We aimed to perform the first survey of testate amoebae community composition in Lake Monte Alegre at São Paulo state, and contribute to mitigate the taxonomic impediment regarding the diversity of testate amoebae in Brazil. Samplings were performed in 20 sampling sites within the lake, in the limnetic and littoral regions in April 2015, using a 58 µm-meshplankton net. We identified 20 taxa of testate amoebae belonging to four families: Arcellidae (8 taxa), Centropyxidae (4 taxa), Difflugiidae (7 taxa) and Lesquereusiidae (2 taxa). The littoral region showed the highest number of taxa (n = 20), whereas in the limnetic region 11 taxa were registered. Therefore, our results evidenced the importance of testate amoebae in aquatic systems, and that further... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ciências Biológicas/Taxonomia protozoa; Species richness; Zooplankton; Taxonomy. Ecologia. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/36768 |
| |
|
| |
|
| |
|
|
| MUXAGATA,ERIK; BARBOSA,CARLA N.; AGOSTINI,VANESSA O.. |
| Abstract: Information about euphausiids in central South Atlantic Ocean is scarce; hence, we investigated species composition and distribution of euphausiids along a longitudinal transect in this region, with an emphasis on Thysanopoda. Zooplankton samples were collected from 44 stations during the first Transatlantic Commission (Brazil–Africa). Euphausiids comprised 21,390 individuals across larval stages (nauplius, calyptopis, and furcilia) and adults. Furcilia and adults were classified to species level when possible, with a total of 19 identified species. Overall, Euphausia species frequency of occurrence and abundance were highest in samples collected near the African coast, while Thysanopada species dominated near the Brazilian coast. Of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Euphausiids; South Atlantic; Thysanopoda astylata; Zooplankton. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100621 |
| |
| Registros recuperados: 242 | |
|
|
|
