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| Balseiro,Esteban; Souza,María S.; Serra Olabuenaga,Ignacio; Wolinski,Laura; Bastidas Navarro,Marcela; Laspoumaderes,Cecilia; Modenutti,Beatriz. |
| We studied the effect of volcanic ash on the crustacean zooplankton (mainly cladocerans) in the Andean North-Patagonian lakes that were affected by the eruption of the Puyehue-Cordón Caulle complex. The study was carried out at three different scales: sub cellular, population and ecosystemic. Cladocerans are filter feeding organisms that cannot distinguish between food (algae less than 30 µm) and suspended ash, therefore when feeding they ingest this material. The ash affected negatively the individuals at a biochemical level, increasing the oxidative stress reacting enzymes like Glutation-S-transferase and the biomarker Acetyl cholinesterase. At the population level, we recorded a decrease in survival and fecundity, in particular, when ash concentration... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Volcanic ash; Cladocerans; Oxidative stress; Survivorship; Trophic level. |
| Ano: 2014 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2014000100009 |
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| Caraballo, Pedro; INPA; Sanchez-Caraballo, Andrés Felipe; Universidad de Sucre; Forsberg, Bruce; INPA; Leite, Rosseval; INPA. |
| Para definir o efeito do seston como fonte de alimento para Ceriodaphnia cornuta e Diaphanosoma spinolosum durante a enchente no lago Catalão (Amazônia Central) foram desenvolvidos experimentos “in situ”, utilizando a variação natural de δ13C e δ15N como traçadores de alimento. As duas espécies tiveram acesso a três diferentes frações de seston (< 10, < 30 e < 60 µm) sendo mantidas em garrafas plásticas de 1,1 L submersas, durante nove dias. As atividades foram iniciadas com uma população de dez indivíduos em cada frasco, com três frascos por cada fração e quatro intervalos de tempo, para um total de 27 frascos por espécie. A cada três dias, foram coletados três frascos e os organismos foram fixados para contagem e observação... |
| Tipo: Crescimento etário |
Palavras-chave: Ciencias Biológicas dinâmica populacional; Cladóceros; Ecologia isotópica Ecologia Population dynamic; Cladocerans; Isotopic ecology. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/7260 |
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| Castilho-Noll,Maria Stela Maioli; Câmara,Carolina Figueira; Chicone,Maira Favaron; Shibata,Érico Hissashi. |
| There are few studies on the zooplankton from the northwestern region of São Paulo State, Brazil, compared to other regions of the State. Cladocerans are a very representative zooplankton group with high species diversity. Most of this diversity can be found at littoral zones of lakes and reservoirs, especially those occupied by macrophytes. This study was part of a thematic project FAPESP/BIOTA Program - The Virtual Institute of Biodiversity (www.biotasp.org.br), and its aim is to catalogue and analyze the distribution of cladoceran species (Crustacea, Anomopoda and Ctenopoda) in pelagic and littoral zones from small reservoirs in the northwest of the São Paulo State, in dry and rainy seasons. Zooplankton samplings were carried out in littoral and pelagic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cladocerans; Chydoridae; Littoral zone; Macrophyte; Northwest of São Paulo State; Shallow lakes. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032010000100001 |
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