MONITORIZAÇÃO DE MICROALGAS PLANCTÔNICAS POTENCIALMENTE TÓXICAS NA ÁREA DE MARICULTURA DA ENSEADA DE ARMAÇÃO DE ITAPOCOROY - PENHA - SC

This paper is a descriptive synthesis of approximately 17 months of phytoplankton sampling in the shellfish culture area of Enseada de Armação do Itapocoroy (Penha - Santa Catarina - Brazil). The goal of this program was to know the local phytoplankton composition, specially the toxic and potentially toxic ones; to verify the characteristics of water masses associated to the different phytoplankton assemblies and to monitor the occurrence of blooms of toxic or potentially toxic species, in order to prevent human intoxication by ingestion of contaminated shellfish. The results have indicated the occurrence of seasonal patterns in species succession. Potential producers of diarrhetic toxins tend to occur in winter and spring. From late spring to late summer the occurrence of Trichodesmium spp. indicate the possible presence of cyanobacteria toxins. Alexandrium fraterculus - a potential producer of paralytic toxin - has ocurred only in low cell densities and mainly in winter.O presente trabalho trata-se de uma síntese de aproximadamente 17 meses de amostragens de fitoplâncton na área de maricultura da Enseada de Armação do Itapocoroy, município de Penha, Santa Catarina. Os objetivos foram conhecer as principais espécies de microalgas planctônicas ocorrentes no local, especialmente as espécies tóxicas ou potencialmente tóxicas; verificar as características das massas de água associadas às diferentes espécies ou assembléias de microalgas (salinidade, temperatura e transparência) e monitorar a ocorrência de densidades elevadas de espécies tóxicas ou potencialmente tóxicas para prevenir possíveis intoxicações pela ingestão de moluscos com acúmulo de ficotoxinas. Os resultados indicam a ocorrência de padrões sazonais de sucessão de espécies. Espécies potencialmente produtoras de toxinas diarréicas e amnésicas tendem a ocorrer nos meses de inverno e primavera. Entre o final da primavera e durante o verão a ocorrência de Trichodesmium spp. indica possibilidade de toxinas de cianobactérias. Alexandrium fraterculus - um potencial produtor de toxina paralisante - ocorreu em pequenas densidades e principalmente no inverno

How experimental physiology and ecological niche modelling can inform the management of marine bioinvasions?

Marine bioinvasions are increasing worldwide by a number of factors related to the anthroposphere, such as higher ship traffic, climate change and biotic communities' alterations. Generating information about species with high invasive potential is necessary to inform management decisions aiming to prevent their arrival and spread. Grateloupia turuturu, one of the most harmful invasive macroalgae, is capable of damaging ecosystem functions and services, and causing biodiversity loss. Here we developed an ecological niche model using occurrence and environmental data to infer the potential global distribution of G. turuturu. In addition, ecophysiological experiments were performed with G. turuturu populations from different climatic regions to test predictions regarding invasion risk. Our model results show high suitability in temperate and warm temperate regions around the world, with special highlight to some areas where this species still doesn't occur. Thalli representing a potential temperate region origin, were held at 10, 13, 16, 20 and 24 degrees C, and measurements of optimal quantum field (Fv/Fm) demonstrated a decrease of photosynthetic yield in the higher temperature. Thalli from the population already established in warm temperate South Atlantic were held at 18, 24 and 30 degrees C with high and low nutrient conditions. This material exposed to the higher temperature demonstrated a drop in photosynthetic yield and significant reduction of growth rate. The congregation of modelling and physiological approach corroborate the invasive potential of G. turuturu and indicate higher invasion risk in temperate zones. Further discussions regarding management initiatives must be fostered to mitigate anthropogenic transport and eventually promote eradication initiatives in source areas, with special focus in the South America. We propose that this combined approach can be used to assess the potential distribution and establishment of other marine invasive species. (C) 2019 Elsevier B.V. All rights reserved.National Council for Scientific and Technological Development (CNPq)Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ)Sustainable prospection in ocean islands: biodiversity, chemistry, ecology and biotechnology (PROSPECMAR-Islands)Rede nacional de pesquisa em biodiversidade marinha (SISBIOTAMar)Foundation for the support of research and innovation in the State of Santa Catarina (FAPESC)Fundacao BoticarioCoordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)Pew FoundationFoundation for Science and Technology (FCT) of PortugalPortuguese Foundation for Science and Technology [SFRH/BPD/111003/2015, CCMAR/Multi/04326/2013, DL57/2016/CP1361/CT0035]Centre Mondial d'Innovation, Roullier GroupCNPqConselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ) [CSF 88888.884790/2014-00, 306917/2009-2]CAPESCoordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) [PNADB 2338000071/2010-61]Instituto Nacional de Ciencia e Tecnologia para as Mudancas no Clima (INCT-MC)info:eu-repo/semantics/publishedVersio

Studien über die wirtschaftliche Bedeutung der insektenfressenden Vögel

Von Dr. G. Röri

Untersuchungen über die Verdauung verschiedener Nahrungsstoffe in Krähenmagen

Von Regierungsrat Professor Dr. G. Röri

Die Verbreitung der Saatkrähe in Deutschland

Von Regierungs-Rath Dr. Röri

Magenuntersuchungen heimischer Raubvögel

Von Regierungsrat Professor Dr. G. Röri