Benthic Organisms
Mostrando 1-12 de 43 artigos, teses e dissertações.
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1. A review of common parameters and descriptors used in studies of the impacts of heavy metal pollution on marine macroalgae: identification of knowledge gaps and future needs
ABSTRACT This study presents a systematic review to assess the main similarities and gaps in efforts to evaluate the impacts of heavy metals on benthic marine seaweeds. A total of 91 studies were compiled, the main parameters (abiotic, biological, ecotoxicological, and heavy metals) and descriptors of which were evaluated by quantitative and qualitative ana
Acta Bot. Bras.. Publicado em: 2020-09
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2. Diet of benthivorous fish and prey availability in streams of the Pirapó River basin-PR
Resumo Objetivo O objetivo deste estudo foi avaliar a dieta de sete espécies de peixes que consomem predominantemente macroinvertebrados bentônicos, e a disponibilidade desses organismos no ambiente. Foi analisada a ocorrência de segregação trófica entre as espécies de peixes e a correlação entre a abundância de macroinvertebrados na dieta e no am
Acta Limnol. Bras.. Publicado em: 16/05/2019
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3. Evaluation of the embryotoxicity in zebrafish (Danio rerio) of the flocculant and coagulant compounds used for water remediation
Resumo Objetivo: O carreamento decorrente das atividades de mineração atinge corpos d'água, causando contaminação da água e acidificação por metais tóxicos. Como conseqüência, a depleção de oxigênio ocorre, com o desaparecimento de certos organismos bênticos, perdas na biomassa do fitoplâncton e do zooplâncton, e mortalidade de peixes. Rem
Acta Limnol. Bras.. Publicado em: 25/04/2019
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4. A new “extreme” type of mantis shrimp larva
Abstract Mantis shrimps are prominent predatory crustaceans. Their larvae, although morphologically very differently-appearing from their adult counterparts, are already predators; yet, unlike the adults they are not benthic. Instead they are part of the plankton preying on other planktic organisms. Similar to some types of lobsters and crab-like crustaceans
Nauplius. Publicado em: 08/10/2018
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5. RESIDUE ANALYSIS OF ORGANOCHLORINE AND ORGANOPHOSPHORUS PESTICIDES IN URBAN LAKE SEDIMENTS
ABSTRACT The knowledge of pesticide residual concentrations in the environment is important to understand the threats to the environment and human health, especially when natural resources are used for human consumption. In this context, this study aimed to assess the potential ecological risk and respective sources of sediment contamination by organochlorin
Eng. Agríc.. Publicado em: 2017-12
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6. Intra- and inter-annual variations in Chironomidae (Insecta: Diptera) communities in subtropical streams
The structure and composition of stream benthic communities are strongly influenced by spatial and temporal factors. This study evaluated the intra and inter-annual variations in Chironomidae communities in subtropical streams. The organisms were sampled from 10 small-order streams during the summer and winter of 2010-2012. The number of chironomid specimens
Zoologia (Curitiba). Publicado em: 2015-06
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7. Genotoxic effect of Phenanthrene on Chironomus sancticaroli (Diptera: Chironomidae)
Phenanthrene, a Polycyclic Aromatic Hydrocarbon, remains adsorbed to sedimentary particles in aquatic environments. It affects mainly benthic organisms, and is considered potentially genotoxic. In ecotoxicology, species of Chironomus Meigen, 1803 are widely known as bioindicators of the effects of chemicals on aquatic organisms. This study investigates the e
Zoologia (Curitiba). Publicado em: 2014-08
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8. New drugs with antiprotozoal activity from marine algae: a review
The use of indigenous or remote popular knowledge to identify new drugs against diseases or infections is a well-known approach in medicine. The inhabitants of coastal regions are known to prepare algae extracts for the treatment of disorders and ailments such as wounds, fever and stomach aches, as for the prevention of arrhythmia. Recent trends in drug rese
Rev. bras. farmacogn.. Publicado em: 2014-06
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9. Avaliação da contaminação de córregos de Cerrado por metais pesados utilizando-se larvas de Odonata como bioindicadores / Assessment of heavy metal contamination in Brazilian savannas streams using Odonata larvae as bioindicators
The aquatic ecosystems are the main receptors of pollutants and contaminants from industrial and agricultural activities and of the discharge of sewage. Among the various substances potentially harmful, heavy metals are a threat to the aquatic ecosystems and the biota. This research aimed to evaluate the contamination of Cerrados streams by heavy metals usin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2012
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10. Rhodolith beds in Brazil: a new potential habitat for marine bioprospection
Rhodoliths are the free-living forms of a number of nongeniculate coralline algae. Rhodolith beds are a common feature of subtidal environments and have been recognized as important carbonate producers and paleoenvironmental indicators, as well as recognized as habitat-forming species. The rhodolith structure provides a hard three-dimensional substrate servi
Revista Brasileira de Farmacognosia. Publicado em: 24/05/2012
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11. Species composition and abundance of the benthic community of Axiidea and Gebiidea (Crustacea: Decapoda) in the Marapanim Bay, Amazon estuary, northern Brazil
The thalassinideans (Axiidea and Gebiidea) encompasses approximately 615 species with reclusive habits, generally confined to extensive galleries burrowed into the sand or mud and, more rarely, in openings in reefs or the cavities of sessile animals such as sponges and coral. These species use the galleries for shelter, feeding and breeding, except during th
Zoologia (Curitiba). Publicado em: 2012-04
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12. Change in the meiofauna community structure of sandy beaches of the Nuevo Gulf (Chubut, Argentina)
The composition and distribution of the benthic meiofauna assemblages of the Nuevo Gulf (Chubut, Argentina) are described in relation to abiotic variables. The meiofauna and sediment samples were collected in the intertidal zone of four sandy beaches with different anthropic disturbances in June 2005. The samples were obtained at 20 sampling sites using a 2.
Pap. Avulsos Zool. (São Paulo). Publicado em: 2012