4 research outputs found

    ATIVIDADES PESQUEIRAS NA LAGUNA RODRIGO DE FREITAS, RIO DE JANEIRO, BRASIL

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    De março de 1997 a junho de 1998 foram feitas cerca de quarenta visitas à Laguna Rodrigo de Freitas para realizar entrevistas com os pescadores da colônia Z-13 e coletar dados sobre a pesca local. O pescado da laguna é bem diversificado, sendo encontradas espécies de grande valor comercial como Mugil curema, Micropogonias furnieri, Centropomus parallelus, C. unidecimalis, Trachinotus carolinus, Gerres aprion e Geophagus brasiliensis. A situação socioeconômica dos pescadores é variada, e a atividade pesqueira exerce grande importância no sustento dos pescadores e de suas famílias. A consciência dos pescadores quanto à preservação do equilíbrio no ecossistema lagunar contribui para que não haja sobrepesca, mantendo a estabilidade da produção pesqueira no local.ABSTRACTFrom March 1997 to une 1998, Rodrigo de Freitas Lagoon was visited about fourty times in order to interview the fishermen from the Z-13 colony and to collect information on the fishery. The fishery is very diversified, and includes species of great comercial value, like Mugil curema, Micropogonias furnieri, Centropomus parallelus, C. unidecimalis, Trachinotus carolinus, Gerres aprion and Geophagus brasiliensis.The socioeconomic situation of the fishesmen is very diversified, and fishing activities exert great importance in the support of the fishermen and their families. The fishesmen are conscious that it is necessary to preserve the equilibrium of the ecosystem in the lagoon. This contributes to avoid over fishing, maintaining the stability of the production

    ATIVIDADES PESQUEIRAS NA LAGUNA RODRIGO DE FREITAS, RIO DE JANEIRO, BRASIL

    No full text
    De março de 1997 a junho de 1998 foram feitas cerca de quarenta visitas à Laguna Rodrigo de Freitas para realizar entrevistas com os pescadores da colônia Z-13 e coletar dados sobre a pesca local. O pescado da laguna é bem diversificado, sendo encontradas espécies de grande valor comercial como Mugil curema, Micropogonias furnieri, Centropomus parallelus, C. unidecimalis, Trachinotus carolinus, Gerres aprion e Geophagus brasiliensis. A situação socioeconômica dos pescadores é variada, e a atividade pesqueira exerce grande importância no sustento dos pescadores e de suas famílias. A consciência dos pescadores quanto à preservação do equilíbrio no ecossistema lagunar contribui para que não haja sobrepesca, mantendo a estabilidade da produção pesqueira no local.ABSTRACTFrom March 1997 to une 1998, Rodrigo de Freitas Lagoon was visited about fourty times in order to interview the fishermen from the Z-13 colony and to collect information on the fishery. The fishery is very diversified, and includes species of great comercial value, like Mugil curema, Micropogonias furnieri, Centropomus parallelus, C. unidecimalis, Trachinotus carolinus, Gerres aprion and Geophagus brasiliensis.The socioeconomic situation of the fishesmen is very diversified, and fishing activities exert great importance in the support of the fishermen and their families. The fishesmen are conscious that it is necessary to preserve the equilibrium of the ecosystem in the lagoon. This contributes to avoid over fishing, maintaining the stability of the production

    COMPOSIÇÃO E DISTRIBUIÇÃO ESPACIAL DO ICTIOPLÂNCTON DA LAGUNA DE JACAREPAGUÁ, RIO DE JANEIRO, BRASIL

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    O trabalho objetivou determinar a composição, a distribuição espacial dos ovos e das larvas e suas relações entre salinidade e temperatura na Laguna de Jacarepaguá. Foram realizadas coletas mensais de março de 1990 a fevereiro de 1991 em quatro áreas da laguna. O plâncton foi coletado na camada superficial com uma rede cônica de 350µm. Foram coletados 172 ovo e 882 larvas. A maior quantidade de ovos ocorreu no período seco em setembro, totalizando 93.02% enquanto que as larvas foram encontradas, em março no período chuvoso, e também de outubro a dezembro de 1990, totalizando 86.28%. As seis espécies de larvas identificadas foram: Xenomelaniris brasiliensis, Tilapia rendallis, Poecilia vivípara, Phalloptychus januarius, Brevoortia pectinata e Gerres aprion, e as famílias Engraulidae e Sparidae. X. brasiliensis foi a mais abundante abrangendo 62.81% do total das capturas. As larvas concentraram-se nas áreas 2 e 4, no período chuvoso, em águas mais quentes. Pequenas variações de salinidade e temperatura foram verificadas na laguna, durante o período pesquisado.ABSTRACT Composition na spatial distribution of the ichthyoplankton of the Jacarepaguá lagoon, Rio de Janeiro, Brazil The aim of this work was to determine the spatial distribution and composition of the eggs and larvae and theis relationships between salinity and temperature in Jacarepaguá Lagoon. Mensal collects were held in the period of March 1990 to February 1991 in four stations.The plankton was collected with a 350µm conic net in the surfasse. One hundred and seventy two eggs and 882 larvae were found. The greatest number of eggs was found in September, 93.02% in the dry season. The larvae were found in March and in the period from October to December 1990, with 86.28% in the rainy season. Six spcies of larvae were identified: Xenomelaniris brasiliensis, Tilapia rendallis, Poecilia vivípara, Phalloptychus januarius, Brevoortia pectinata and Gerres aprion, and the families, Engraulidae and Sparidae. X. brasiliensis was the most abundant on with 62.81% of the total capture catches. The larvae stages were concentrated in the second and fourth áreas, during the rainy season and in warm water. Short variations in temperature and salinity were evidenced in the lagoon in this period

    Brazilian Flora 2020: Leveraging the power of a collaborative scientific network

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    International audienceThe shortage of reliable primary taxonomic data limits the description of biological taxa and the understanding of biodiversity patterns and processes, complicating biogeographical, ecological, and evolutionary studies. This deficit creates a significant taxonomic impediment to biodiversity research and conservation planning. The taxonomic impediment and the biodiversity crisis are widely recognized, highlighting the urgent need for reliable taxonomic data. Over the past decade, numerous countries worldwide have devoted considerable effort to Target 1 of the Global Strategy for Plant Conservation (GSPC), which called for the preparation of a working list of all known plant species by 2010 and an online world Flora by 2020. Brazil is a megadiverse country, home to more of the world's known plant species than any other country. Despite that, Flora Brasiliensis, concluded in 1906, was the last comprehensive treatment of the Brazilian flora. The lack of accurate estimates of the number of species of algae, fungi, and plants occurring in Brazil contributes to the prevailing taxonomic impediment and delays progress towards the GSPC targets. Over the past 12 years, a legion of taxonomists motivated to meet Target 1 of the GSPC, worked together to gather and integrate knowledge on the algal, plant, and fungal diversity of Brazil. Overall, a team of about 980 taxonomists joined efforts in a highly collaborative project that used cybertaxonomy to prepare an updated Flora of Brazil, showing the power of scientific collaboration to reach ambitious goals. This paper presents an overview of the Brazilian Flora 2020 and provides taxonomic and spatial updates on the algae, fungi, and plants found in one of the world's most biodiverse countries. We further identify collection gaps and summarize future goals that extend beyond 2020. Our results show that Brazil is home to 46,975 native species of algae, fungi, and plants, of which 19,669 are endemic to the country. The data compiled to date suggests that the Atlantic Rainforest might be the most diverse Brazilian domain for all plant groups except gymnosperms, which are most diverse in the Amazon. However, scientific knowledge of Brazilian diversity is still unequally distributed, with the Atlantic Rainforest and the Cerrado being the most intensively sampled and studied biomes in the country. In times of “scientific reductionism”, with botanical and mycological sciences suffering pervasive depreciation in recent decades, the first online Flora of Brazil 2020 significantly enhanced the quality and quantity of taxonomic data available for algae, fungi, and plants from Brazil. This project also made all the information freely available online, providing a firm foundation for future research and for the management, conservation, and sustainable use of the Brazilian funga and flora
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