6 results on '"Otto Bismarck Fazzano Gadig"'
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2. Habitat and Marine Reserve Status Drive Reef Fish Biomass and Functional Diversity in the Largest South Atlantic Coral Reef System (Abrolhos, Brazil)
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Fernanda Andreoli Rolim, Tim Langlois, Fábio dos Santos Motta, Guilherme Malagutti de Castro, Emily Lester, Maria Luiza Abieri, Otto Bismarck Fazzano Gadig, and Rodrigo Leão de Moura
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marine protected area ,MPA ,stereo-BRUVs ,South Atlantic ,Chondrichthyes ,Actinopterygii ,Science ,General. Including nature conservation, geographical distribution ,QH1-199.5 - Abstract
The effects of fishing have been documented across coral reefs worldwide. No-take marine reserves do not only act as a conservation tool but also allow an opportunity to study impacts of fishing, by acting as control sites. In addition, well-planned and well-managed no-take marine reserves (NTRs) provide conservation benefits that are essential to marine biodiversity and ecosystem-based management. The Abrolhos Marine National Park, off the tropical Brazilian coast, protects part of the largest coral reef system in the South Atlantic. To investigate the effects of fishing on reef fish richness, abundance, biomass, and functional diversity of the fish assemblage, we compared sites across two protection levels considering the variation in habitats (Fringing Reefs—Protected; Pinnacles Reefs—Protected; and Coastal Reefs—Open Access), using Baited Remote Underwater Stereo-Video systems (stereo-BRUVs). We adjusted generalized additive mixed models of fish assemblage characteristics with protection levels and environmental variables, such as topographic complexity (mean relief and relief variation), visibility, and benthic cover percentage. Inside NTRs, we found higher total biomass and biomass of fishery target species and carnivores, specifically for the Carcharhinidae (sharks) and Epinephelidae (groupers) families, indicating direct fisheries effects on these groups. In contrast, the ecological parameters of non-target fish were positively correlated with habitat characteristics, including mean relief and variance of relief. Moreover, fish functional diversity was higher within NTRs, demonstrating an even distribution of functional entities. The presence of large mobile predators and the overall higher biomass of carnivores inside the NTR indicate the effect of fishing exclusion. Our results point to the value of NTRs to study the effects of fishing and achieve biodiversity conservation and suggest the importance of using remote sampling methods to assess large mobile predators.
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- 2022
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3. Coleções zoológicas didáticas: uma ferramenta para a conservação da biodiversidade costeira
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Marcio Camargo Araujo João, Helton Souza de Sá, Graziela Alexandre Souza, Otto Bismarck Fazzano Gadig, Marcelo Antônio Amaro Pinheiro, and Ana Carolina Biscalquini Talamoni
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General Earth and Planetary Sciences ,General Environmental Science - Abstract
As Coleções Zoológicas Didáticas (CZD), quando contextualizadas, podem potencializar o ensino de zoologia e auxiliar os processos relativos à preservação e conservação das espécies. Este estudo relata uma experiência de Projeto de Ensino que, visando contribuir para ações de Educação Ambiental e o ensino e aprendizagem de zoologia, criou e implementou uma CZD em Escola Técnica do Município de São Vicente (SP). O material reuniu 30 espécies representativas da biodiversidade costeira do Litoral Centro de São Paulo, com potencial interdicisplinaridade a ser trabalhada nas aulas de ciências e biologia. Para implementar a CZD, foi oferecido um curso aos docentes da escola, além de material de apoio ao uso dessa coleção.
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- 2022
- Full Text
- View/download PDF
4. Comparative trophic ecology of two sympatric guitarfishes Pseudobatos (Chondrichthyes, Rhinobatidae) from Southeast Brazil, southwestern Atlantic
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Luiza de David Chelotti and Otto Bismarck Fazzano Gadig
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Aquatic Science ,Ecology, Evolution, Behavior and Systematics - Abstract
The present study compares the trophic ecology of two guitarfishes (Pseudobatos percellens and Pseudobatos horkelii) from the continental shelf of the São Paulo State, Brazil, caught by the bottom pair trawls between 2007 and 2009. These two sympatric species are under different threat categories, "Vulnerable" and "Critically Endangered," respectively, according to Brazilian agencies. Thus, any study considering trophic ecology parameters is pivotal in understanding the trophic ecology role of such species in the ecosystem. The authors analysed 500 stomachs of P. percellens and 108 of P. horkelii, quantifying with dietary indexes: numerical (%N), gravimetric (%W), frequency of occurrence (%FO) and the prey-specific index of relative importance (%PSIRI). For P. percellens and P. horkelii, 26 and 14 different prey items were found, respectively. Crustacea and Teleostei were the most important prey items for both species, indicating a specialist feeding behaviour due to their low niche amplitude. The results provide evidence related to ontogenetic dietary shift in P. percellens and individual-level diet specialization in both species. These two benthic-demersal elasmobranchs are important mesopredators (3,7 for P. percellens, and 3,5 for P. horkelii) in the study area, with high trophic-level values.
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- 2022
5. The Professor Ulisses Leite Gomes and his contribution on the elasmobranchs anatomic and taxonomic studies (Chondrichthyes: Elasmobranchii)
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Karla Diamantina de Araújo Soares, Otto Bismarck Fazzano Gadig, and Hugo Ricardo Secioso Santos
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Morphology ,Pesquisador brasileiro ,Sharks ,General Medicine ,Rays ,Morfologia ,Tubarões ,Raias ,Brazilian researcher - Abstract
Este artigo é uma homenagem ao professor e ictiólogo brasileiro Ulisses Leite Gomes, uma das maiores referências em morfologia e taxonomia de elasmobrânquios no mundo, e que agora está se aposentando após 40 anos de serviços prestados à Universidade do Estado do Rio de Janeiro (UERJ). Aqui, contamos um pouco de sua história e de sua trajetória nos estudos de tubarões e raias e suas importantes contribuições para o conhecimento desse grupo. Ao final, apresentamos depoimentos de ex-alunos(as) e colegas de profissão, que gentilmente se unem a nós nessa homenagem, representando toda a comunidade acadêmica ictiológica. This article is a tribute to the Brazilian professor and ichthyologist Ulisses Leite Gomes, one of the greatest references in morphology and taxonomy of elasmobranchs in the world, and who is now retiring after 40 years of service at the Universidade do Estado do Rio de Janeiro (UERJ), Brazil. Here, we tell a little about his history and trajectory in the studies of sharks and rays and his important contributions to those groups' knowledge. At the end, we present testimonies from former students and professional colleagues, who kindly join us in this tribute, representing the entire ichthyological academic community.
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- 2022
6. A tale that never loses in the telling: Considerations for the shifting ethnobaseline based on artisanal fisher records from the southwestern Atlantic
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Sérgio Ricardo Santos, Márcio Luís Chagas Macedo, Thaís Rodrigues Maciel, Gabriel Barros Gonçalves Souza, Laís da Silva Almeida, Otto Bismarck Fazzano Gadig, Marcelo Vianna, Universidade Federal do Rio de Janeiro (UFRJ), Universidade Federal Fluminense (UFF), and Universidade Estadual Paulista (UNESP)
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Ecology ,Anthropology ,Common names ,Animal Science and Zoology ,Plant Science ,Ethnoknowledge ,Small scale fisheries ,Nature and Landscape Conservation - Abstract
Made available in DSpace on 2022-04-28T17:23:05Z (GMT). No. of bitstreams: 0 Previous issue date: 2022-01-01 PetroRio An ethnoichthyological survey was conducted with fishers from traditional communities distributed between the Lakes Region and the northern Fluminense region, in the state of Rio de Janeiro, Brazil. The study was developed based on semi-structured interviews, with fishers with at least 30 years of experience. Fishers were asked about changes noted for the biological communities with which they interact with, such as reports concerning abundance changes, the disappearance of certain species or the insertion of new ones, as well as weight and size changes. The reported ethno-names were confirmed at the specific level whenever possible through photographs and complementary descriptions. Eighty-five fishers aged between 39 to 83 years old were interviewed. Fishing activity times ranged from 30 to 68 years, averaging 40.6 years. Fishers reported differing estimates from what was expected according to the known length-weight relationship for the reported species. In general, length estimates were closer to the expected for medium-sized fish from 0.3 m to 1 m. Sixty-nine ethno-names and their variations were identified, associated with 58 fish categories. Of this total, denominations were associated to 47 local fauna species or genera, while one ethno-name was not linked to any taxonomic identification. This study is the result of research financed by the Brazilian Fund for Biodiversity and the Pescarte Environmental Education Project, a mitigation measure required by the Federal Environmental Licensing, conducted by IBAMA. Univ Fed Rio de Janeiro, Lab Biol & Tecnol Pesqueira BioTecPesca, BR-21941590 Rio De Janeiro, RJ, Brazil Univ Fed Rio de Janeiro, Programa Posgrad Ecol, BR-21941590 Rio De Janeiro, RJ, Brazil Univ Fed Fluminense, BR-24220008 Niteroi, RJ, Brazil Univ Estadual Paulista, Lab Pesquisa Elasmobranquios, BR-11330900 Sao Vicente, SP, Brazil Univ Estadual Paulista, Lab Pesquisa Elasmobranquios, BR-11330900 Sao Vicente, SP, Brazil
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- 2022
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